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William Sellers & Co.
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| Name | William Sellers & Co. |
| Ortssitz | Philadelphia (Penns.) |
| Straße | Hamilton Street 1600 |
| Art des Unternehmens | Maschinenfabrik |
| Anmerkungen | Bis 1855 unter der Firma "Bancroft & Sellers" in Philadelphia-Kensington gegründet. 1868/72: in der Sixteenth und Hamilton streets. 1949 dei Werkzeugmaschinenproduktion an "Consolidated Machine Tool Corporation". |
| Quellenangaben | [Spur vom Wandel ind. Welt (1991) 303] [Wiley: American iron trade manual (1874) 142+147] [Pennsylvania and the Centennial Exposition (1878) 230] [Bishop: History of American manufacturers 3 (1868) 28] |
| Hinweise | [Hexamer General Surveys, Plates 617+618 (1872)] [Poor's Manual of Railroads 26 (1893)]: Anzeige Karusselldrehbank; [Philadelphia and popular Philadelphians (1891) 106]: Werksansicht; [Poor's Manual of Railroads 22 (1889) 54]: Anzeige Machine Tools (mit Drehbank-Spindelstock) |
| Zeit |
Ereignis |
| 1848 |
Gründung unter der Firma "Bancroft & Sellers". Gebaut werden schwere Werkzeugmaschinen, und zwar in Anlehnung an den Whitworth-Stil. Die Firma erwirbt sich ihren Ruf mit Bolzen- und Mutternschneidemaschinen, Hobelmaschinen und Drehbänken. Sie nimmt insgesamt 90 Patente auf und gilt hinsichtlich ihrer Werkstattstechnik als erstklassig. |
| 1848 |
William Sellers wird Teilhaber seines Schwagers Edward Bancroft (1811–1855) in der Firma "Bancroft & Sellers" |
| 1853 |
Bau einer neuen Werkstätt an der 16th Street und Pennsylvania Avenue |
| 1855 |
Tod des Senior-Partners Bancroft. Danach Umwandlung aus "Bancroft & Sellers". Inhaber sind die zwei zwei Brüder William und John Sellers, Jr. |
| 1856 |
Eintritt als Junior-Partner Chefingenieur bei "William Sellers & Co." in Philadelphia |
| 1867 |
Sellers stellt auf der Pariser Weltausstellung eine neue Hobelmaschine aus. |
| 1870 |
Umzug in neue Gebäude |
| 1871 |
William S. Hudson, Leiter der "Rogers Locomotive Works", entwirft ein Bohrwerk, das bei Sellers hergestellt und von Rogers 1871 erworben wird. Es kann einen 16 x 14"-Zylinder in acht Stunden ausbohren |
| 1873 |
Coleman Sellers, John Sellers Bancroft und James C. Brooks werden Teilhaber |
| 1876 |
Auf der Weltausstellung in Philadelphia werden im Bereich der Methodenbearbeitung insbesondere die amerikanischen Firmen William Sellers & Co. und Brown & Sharpe hervorgehoben. |
| 1886 |
Eintragung von "William Sellers & Co." mit William Sellers als Präsident |
| Produkt |
ab |
Bem. |
bis |
Bem. |
Kommentar |
| Bolzen- und Mutternschneidemaschinen |
1848 |
Beginn vmtl. ab Gründung |
1876 |
Weltausstellung |
|
| Dampfhämmer |
1876 |
Weltrausstellung Philadelphia |
1876 |
Weltrausstellung Philadelphia |
|
| Drehbänke |
1848 |
Beginn vmtl. ab Gründung |
1876 |
Weltausstellung |
|
| Drehbrücken |
1874 |
[Wiley: American iron trade (1874)] |
1874 |
[Wiley: American iron trade (1874)] |
Vorgabe: pivot bridges |
| Drehscheiben |
1874 |
[Wiley: American iron trade (1874)] |
1874 |
[Wiley: American iron trade (1874)] |
Vorgabe: railroad turn-tables |
| Dreizylindermaschinen |
1876 |
Weltrausstellung Philadelphia |
1876 |
Weltrausstellung Philadelphia |
vmtl. Dampfmaschinen |
| feine Maschinen |
1874 |
[Wiley: American iron trade (1874)] |
1874 |
[Wiley: American iron trade (1874)] |
Vorgabe: fine machinery |
| Gußeisen |
1874 |
[Wiley: American iron trade (1874)] |
1874 |
[Wiley: American iron trade (1874)] |
Auch Maschinenguß |
| Hobelmaschinen |
1848 |
Beginn vmtl. ab Gründung |
1876 |
Weltausstellung |
|
| Injektoren |
1876 |
Weltrausstellung Philadelphia |
1876 |
Weltrausstellung Philadelphia |
|
| Lochstanzen |
1876 |
Weltrausstellung Philadelphia |
1876 |
Weltrausstellung Philadelphia |
|
| Maschinerie |
1874 |
[Wiley: American iron trade (1874)] |
1874 |
[Wiley: American iron trade (1874)] |
Vorgabe: machinery |
| Riemenscheiben |
1876 |
Weltrausstellung Philadelphia |
1876 |
Weltrausstellung Philadelphia |
|
| Scheren |
1876 |
Weltrausstellung Philadelphia |
1876 |
Weltrausstellung Philadelphia |
|
| Transmissionen |
1876 |
Weltrausstellung Philadelphia |
1876 |
Weltrausstellung Philadelphia |
|
| Transmissionskupplungen |
1876 |
Weltrausstellung Philadelphia |
1876 |
Weltrausstellung Philadelphia |
|
| Transmissionslager |
1876 |
Weltrausstellung Philadelphia |
1876 |
Weltrausstellung Philadelphia |
|
| Werkzeugmaschinen |
1874 |
[Wiley: American iron trade (1874)] |
1876 |
Weltrausstellung Philadelphia |
Vorgabe: Machine tools |
| Zeit |
Objekt |
Anz. |
Betriebsteil |
Hersteller |
Kennwert |
Wert |
[...] |
Beschreibung |
Verwendung |
| 1872 |
Dampfkessel |
3 |
|
unbekannt |
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Zeit = 1: Zeitpunkt unbekannt
| ZEIT | 1868 |
| THEMA | Firmenbeschreibung |
| TEXT | In the manufacture of Machine Tools, Philadelphia has a peculiar and deserved celebrity. Iron being comparatively cheap, by reason of proximity to the sources of its production, the Philadelphia builders use it freely in the beds and other important parts of their tools, which are consequently remarkable for solidity and freedom from injurious vibration when in active use. The weight of metal, however, is not so much their distinguishing" characteristic as the excellence of the workmanship. Any one who will visit the establishment of William Sellers & Co., canuot fail to be astonished at the extreme pains taken to insure accuracy in all parts of the machines which they make. The wearing surfaces are scraped together - a slow and laborious process, which, however, secures absolute contact at every point. The bolt-holes are all reamed, and the bolts turned and driven home. The gearing is cut to a perfect form of tooth in every case. All the parts are made to standard guages, whereby each will fit its corresponding part in a hundred tools. The firm which we have named has attained a reputation that is truly enviable. We know of no other that in so short a period of time has built up a mechanical reputation so wide-spread, resting on a basis of unquestioned substantial excellence. In 1848, the firm of Bancroft & Sellers commenced business in Philadelphia, and in a very few years their influence was feit in all branches of the machine manufacture. Tools from their shop were ordered from Russia, and supplied to other parts of Europe. Early in 1855, Mr. Bancroft died. Since his decease, the firm has been composed of two brothers, William and John Sellers, Jr., names that at this time are everywhere regarded as a sufficient guarantee of the excellence of whatever they manufacture. In workmanship, mathematical, not proximate accuracy, is their standard. A variation of a hair's breadth, if it can be overcome, is not left unremedied. Besides Machinists' Tools, this firm manufactures a number of special articles which are in extensive demand. The Self-adjusting Hanger, made by them, is of great value in the construction of shafting, inasmuch as it allows the shaft complete control of the bearing, so as to insure an equal amount of pressure on every part. By means of this, they are enabled to use a, long bearing without danger of binding the shaft, thus reducing the pressure per square inch upon the bearing, and consequently requiring less oil, as the pressure does not force out the oil so as to bring the surfaces of iron in contact and cause them to heat and cut. About six years ago, the firm introduced a new plan of coupling shafting together, which obviated entirely the necessity, before existing, of fitting each shaft to its proper coupling, and also enabled them to adopt a new style of hanger, of much cheaper construction than any in use, the whole completing a system at present unequaled, all parts being interchangeable. The ability to interchange the parts in any system of construction is a matter that manufacturers can fully appreciate; but in shafting, it not only greatly facilitates its first introduction, but it enables any subsequent alterations or repairs to be readily made, and, what is of prime consequence, reduces its first cost whilst it im proves the article. They also manufacture a Turn-Table, for turning an engine and tender, of which the largest size is fifty-four feet in diameter, and weighs 32.000 ibs. It consists of a quadrangular centre-piece or box, upon which the arms for carrying the rails are keyed in a very substantial manner. At the outer end of the arms are placed two cross-girts, carrying four truck wheels, which are intended to take the weight when the load is going on or off. The centre rests upon Parry's Patent Anti-Friction Box, and the power of one man is sufficient to turn the table and its load easily, without the intervention of any gearing. They are so constructed that water in the pit, within eighteen inches of the top of the rail on the road, will not impair their efficiency or durability. Twenty-five of these Turn-Tables are now in use on the Pennsylvania Central Railroad, and the orders for them require the firm to complete one in every four days. Some three years ago, Messrs. Sellers & Co. introduced Giffard's Patent Self-acting Water Injector, for feeding boilers, of which they are now sole manufacturers and licensees. This is an apparatus which is intended to dispense with pumps in feeding boilers and the various movements for working them in all classes of engines. It is an adjunct to the boiler, and entirely independent of the engine, and its application is rendered especially easy by the fact that it can be placed in any position, vertical, horizontal, or otherwise, and near to, or at a distance from the boiler, and at any reasonable height above the line of the feed water. This Injector will supply itself from the hot well of a condensing engine, and is connected with the boiler by two pipes, one leading from the steam space, and the other conducted to the lowest convenient point of the water space. By using this apparatus, those having boilers save not only the first cost of all pumps and the parts to connect them with the engine and boiler, but the power required to work them, and their wear and tear, which in high-pressure engines is very considerable. Since their introduction, and the improvements which they have made upon them, this firm have sold more than three thousand, and we believe with entire satisfaction to the purchasers. They have now forty hands constantly employed in manufacturing them, and their orders are at the present time fully up to their capacity for producing them. As this work will probably be perused by a large number of manufacturers, and others who have boilers and steam engines, we probably cannot do our readers a greater practical service than in calling their attention to this valuable improvement. The General Superintendent of the Pennsylvania Central Railroad, Mr. Enoch Lewis, writes: "We have a large number of Giffard's Injectors upon our stationary and locomotive engines, and they continue to give us entire satisfaction. Upon all the new engines built for us during the past year, and upon those being bui>« for us at this time, we are using them to the entire exclusion of pumps. Wherever pumps require renewal, we use Injectors in place of them. We find them less liable to derangement than pumps, and at least equally efficient." Robert Rennie, proprietor of the Lodi Print Works, Bergen county, N. J., certifies : "The Giffard Injector has now been in use on one set of my boilers for nearly two months. It is a perfect success, and, although I have some of the best known steam pumps on my other boilers, I intend to take them all out, and supply their places with Injectors. They are the most perfect boiler feeder ever invented, and a blessing to any one that has as many boilers as I have." Isaac Hinckley, Superintendent of the Merrimack Manufacturing Corporation at Lowell, writes: "The No. 6 Giffard Injector, which we received in November last, has never failed to perform its duty perfectly. It takes feed water at about 125° Fahr't, from a tank placed about thirty inches below the water lintf of the boilers; and feeds in the most satisfactory manner a boiler of seven feet diameter and twenty-five feet long, and carrying steam at about twenty-four pounds. The second Injector of the same size, lately received, is also in successful operation, feeding a nest of boilers, where steam is carried at forty pounds. We shall want in April three more Injectors; and I now see no reason to doubt that this Company will eventually apply this apparatus to their whole system of boilers, which is of an extent to require nine thousand tons of coal per annum." Garsed & Brother, proprietors of the Wingohocking Mills, write: "We have used no Force Pump since the Injector was put up. The average pressure of our steam ii eighty pounds; and we are so well satisfied with it that we would not be without it for double its cost." G. Dawson Coleman, proprietor of the Lebanon Furnaces, writes : "No one, after seeing the operation of the Injector, can hesitate as to which to adopt when ordering a new engine; and most persons would decide to abandon the pumps on an old one. They are particularly valuable at blast fur-naces, where we have so little time for repairs." This firm are now manufacturing the Morrison Steam Hammer in this country. It is largely in use in England, being manufactured at Newcastle-upon-Tyne, by Messrs. Robert Morrison & Co. These machines differ principally from other Steam Hammers in having the piston-rod and piston forged in one solid mass, and of a size sufficient to give the required weight; the rod or hammer bar passes through both ends of the steam cylinder, which forms the only guides; the space underneath the cylinder is thus entirely clear, giving great facility for handling the iron. The celebrated Armstrong guns have all been forged under this hammer, and the English firm are just completing an immense machine of this kind. The weight of the hammer bar, which has just been completely finished, is 40 tons, its fall 13 feet, having a piston of 78 inches diameter forged solid upon it, the bar itself being 26 inches in diameter, and 38 feet long. This is the largest forging ever made. These hammers are of two kinds; in one the valve is worked by hand, and may be either single or double acting, that is, the steam may be admitted to the under side of the piston only, or by a slight additional movement to the same valve, can be admitted upon the upper side also; in the other, the valve is under the control of the hammer itself, which enables the workman to obtain very rapid blows, the intensity of which are entirely under his control. The works of Wm. Sellers & Co. are located at Sixteenth and Hamilton streets, and consist of a machine shop 320 by 83 feet, and a new three-story fire-proof building 110 by 55 feet, for the storage of finished work and patterns. This latter building contains their offices, drawing rooms, etc. Adjoining the above, the firm have two foundries, in one of which the moulding floor is 80 feet square, and is entirely devoted to heavy castings; in the other, the moulding floor is 80 by 40, with a wing of 80 by 20, all of which are devoted to the lighter class of work. Beside the above are the requisite buildings for pattern shops, smithy, and brass foundry. The engine and boiler for driving these works are located in smaller buildings, distinct from the main ones, so as to make the whole as nearly fire-proof as possible. The future of American progress in the arts and manufactures depends largely upon the perfection of the tools with which her machines are made; and it is a source of National pride and congratulation that such a great degree of excellence has been attained, and that the general standard of manufacturing is so far advanced as to maintain a demand for such a superior class of machinery. |
| QUELLE | [Bishop: History of American manufacturers 3 (1868) 28] |
| |
| ZEIT | 1874 |
| THEMA | Angaben zum Unternehmen |
| TEXT | The manufacturing firm of Wm. Sellers & Co. of Philadelphia, so noted as makers of machine tools, steam hammers, shafting, mill gearing, turntables, and the Gifiord injector for supplying steam boilers with water, had its origin in 1848 under the firm name of Bancroft & Sellers, in that part of Philadelphia known as Kensington. The shops there occupied proving too small to accomodate their increasing trade, they removed in 1853 to a lot bounded by Sixteenth and Seventeenth Streets, and Hamilton Street and Pennsylvania Avenue. Here they erected shops of one story in height, which seemed to them extensive enough for all future wants. In 1855 Mr. Bancroft died, and the firm name was changed to its present style, two brothers, Messrs. William and John Sellers, jr., being the only members of the new firm. In time, with a rapidly increasing business, the square occupied by their shops did not afford space sufficient, even with extension of their buildings, made two and three stories high. Fortunately an adjoining square north of their shops was offered for sale, and they erected other buildings on it, removing the foundry and pattern shop to the new site. Upon this lot they have a foundry 295 feet long by 80 feet wide. Of this extensive space, 200 feet in length is 33 feet high in the clear. A very perfect system of cranes swinging over the part needed for heavy castings is here provided. Two of these cranes are of a capacity to hoist 50 tons, others 25 tons, and a few of 10 tons capacity each. The rooms for making cores, the core ovens, the cupola room, pattern shop and rooms for storage of patterns, as well as rooms for cleaning castings are adjoining the main foundry. The whole space under the roof beeing 178 by 275, nearly one half of this being two stories high. The coal vaults are under ground and vaulted passages give access to the furnaces for heating the core ovens. In one of the underground vaults are the hydraulic engines for working the crane hoists. This foundry has been fitted with special reference to their peculiar business, and every care is taken to make very superior castings, both as regards quality of material and smoothness of surface. The south square, that is the part first occupied by the firm, is now devoted entirely to machine shops and blacksmith shops. The main building, one story high, is 80 by 369 feet. At one end of this large room a space 80 by 80 feet is roofed over 25 feet in the clear, while the remainder of the building is 16 feet high under the beams. The windows are large, and the whole space is admirably lighted and well ventilated, while in winter all parts of all their buildings are heated by steam. A three story fire-proof building, 110 by 55 feet, gives space for turning shop and store rooms. In this building are also located the office and drawing room. Other buildings cover all the available space in the lot, and are used for the manufacture of specialties. The entire space occupied by the works is over five acres, in the heart of the city. A track from the Reading Railroad passes into the buildings, crossing Hamilton Street, and enables the distribution of coal, lumber, and material to all needful parts; also furnishing a ready means of shipping machinery by rail. A noteworthy feature of the main machine shop is a railroad track, laid on heavy foundation walls, extending the entire length of the main building, this track, with convenient turn-tables at proper intervals being a portion of the railroad system extending to the tracks of the Reading Railroad. The principal tools in the main room are set on cast iron floor-plates, resting on foundation walls, while the part of the floor upon which the work men stand is made of wood. This arrangement insures great solidity to the machines. |
| QUELLE | [Wigley: Iron industry (1874)] |
| |
| ZEIT | 1891 |
| THEMA | Beschreibung |
| TEXT | At the great iron works of William Sellers & Company (Incorporated), Philadelphia, manual skill in a large measure is dispensed with as there are various machines for turning, planing, shaping, drilling, or boring metal or wood in which the tool or cutting edge is guided in its fixed path by mechanical means. The term "machine tool" in this connection should be understood to include all machines that work or shape metal, as steam hammers, hydraulic forging machines, riveting machines, punching and shearing machines. As a distinct branch of industry, "machine tool" making is of recent date. The first man to attempt the construction of "machine tools" was Mr. Joseph Whitworth, of England. Not long after this "Bancroft & Sellers", now "William Sellers & Co. (Incorporated)", started a similar establishment in this country. They began in 1848 with the making of "machine tools" shafting and mill gearing, their shops being located in Kensington. In 1853 they erected new buildings at Sixteenth and Seventeenth streets, Pennsylvania avenue and Hamilton street, the works taking in the entire block. In 1855, not two years after the occupation of the new works, Mr. Bancroft, the senior partner, died, and the business passed into the hands of William Sellers and John Sellers, Jr., the firm name being "William Sellers & Company". The two brothers constituted the firm until 1873, when Coleman Sellers, John Sellers Bancroft and James C. Brooks, who had long been associated in the business were admitted to partnership. In 1870 they removed to new buildings covering more than half the square of ground north of them, all that pertained to the foundry, namely : the pattern shop, pattern storage rooms, and the foundry proper. In addition to the
regular business of the house of "machine tool" making, they have for several years been engaged in the manufacture of other necessities of railroads, as turn tables for locomotives, turn tables for pivot bridges, sliding or transfer tables. Their cast iron turn table has been adopted by many of the railroads in the United States, South America and Australia, and is in use in Europe. Among the most important of their recent productions are two high speed power
travelling cranes just placed in the new erecting shops of the Baldwin Locomotive Works. Each of these cranes has two 50-ton trolleys, making the total capacity of each crane 100 tons. The machinery is driven by electric motors and the speed of the cranes is as follows: Upon the runway 100 and 200 feet per minute; transversely in the crane bridge 50 and 100 feet per minute; hoisting and lowering 5, 10, 20, and 40 feet per minute; all variable at the will of the operator to any speed between maximum and zero and may be made without shock or jar. This house introduced the Gifford boiler injectors into the United States, and improved it greatly, and is now sending the improved instruments in large
quantities to the French railways. The first display of the work of this house in Europe was in Paris in 1867. This they followed by a larger exhibit in Vienna in 1873. In Paris they received the Gold Medal, and in Vienna what is called the Great Diploma of Honor, the highest possible mark of appreciation. The award was to "Sellers for pre-eminent achievements in the invention and construction of 'machine tools,' many of which have been adopted as patterns by the constructors of tools in all countries." With the advent of "machine tools," wooden cog wheels, wooden shafts, and the cumbersome wooden drums gave way to iron pulleys on iron shafts, running in metal boxes. But all those were of clumsy and heavy designs, altogether too heavy, and as they were sold at so much per pound, there was small inducement for the manufacturer to attempt a reducement in weight. The need of a more perfect system of transmission had long occupied
the mind of Mr. Edward Bancroft, and at last he designed a form of hanger for shafts which is known as the "ball and socket hanger", and is now in general use throughout the country. It involves a self-adjusting principle in the alignment of the box in relation to the shaft turning in it and ready means of lining up the entire series of shafts, making one continuous line. Oddly enough after this invention was completed, Mr. Bancroft could not induce a single
one of the leading manufacturers to take hold of it. On this account the house of Bancroft & Sellers pushed forward to further perfect the manufacture of shafting, and soon became as celebrated for the excellence of their shafting as for their other machines. In fact they turned their attention very particularly to the shafting business and they contrived many ingenious machines in this connection. They introduced a new form of coupling for uniting the separate pieces of round iron going to make up a line of shafts. This coupling was easily attached and detached, did away with much expensive fitting requiring skilled workmen and allowed the use of a form of hanger with less metal than was ever before possible. It took some time to show the users of hangers that it would be true economy to pay more per pound for a good article, that was honestly strong and would cost less money to keep running and in repair than to buy, at say ten per cent less per pound triple the number of pounds costing more coal to run. But eventually this lighter and more efficient shafting was placed upon the market at no greater cost in the aggregate than the other articles. This change was due entirely to the introduction of improved "machine tools." Many hundreds of miles of this improved shafting now drive the cotton and woolen mills of this country, and there are numerous examples of it to be found abroad. In their exhibit in Paris in 1867, and afterwards in Vienna, this new system of shafting was first displayed in Europe. A number of the technical schools of Europe have purchased samples of hangers, couplings, etc., which they have placed in their museums. The foreign journals, while enthusiastic over the merits of the hangers and couplings of this firm, declare that in their introduction to Europe, much is due to the establishment of a scale of fixed prices in contradiction of the custom of some other manufacturers, who, selling their goods by weight, w'ould make them inconsistently heavy. For instance, the London Standard says, "The advantages thus arising to the purchasers of the Messrs. Sellers' improved
shafting consist not only in a direct saving of first cost by greatly diminished weight, but in the acquisition of a well constructed and smooth running shafting of very neat appearance and as light as is consistent with the required
strength. The journal boxes are unusually long and so held in their supports as to always insure a uniform distribution of pressure over the entire length of bearing. In their construction iron is used instead of brass or other soft metal composition." Appended to the report made by the British Commissioners to Parliament on the subject of the Vienna Exhibition, there were a series of technical papers on special sections of the Exhibition contributed by W. W. Maw and James Dredge. Speaking of machine tools they say of the exhibit from the United States, "For the number of machines it included there was in fact no collection of tools in Machinery Hall which could compete for real originality of construction with that found in the American department. Messrs. W. Sellers & Company, of Philadelphia, are well known as the Whitworths of America, and their exhibits well sustained their reputation both for design and excellence of workmanship." One of their machines which attracted perhaps the largest share of attention at the European exhibitions was a peculiar kind of planing machine for metal. It was the invention of Mr. William Sellers and involved an entirely new principle in the method of operating the table. A shaft crossing the bed diagonally has on ita spiral pinion, this pinion engages the teeth of a straight rack and imparts an exceedingly uniform motion to the table with less friction than is common to other methods of driving. This machine has been greatly improved of late years and is now as far in advance of the ordinary constructions of planing machines as the original invention was of the machines then in use.
Another of the English journals speaking of the planing machine for metal, said, "The American inventor had in view the construction of a better machine than any now in use and that could be more economically placed in the workshop. The English builder of what purported to be the same character of tool, adapted devices which had been found to work well but ignored all the deviations from existing customs that looked towards a rational change in the placing of tools in the work shop. American mechanics have been obliged to bestir themselves in the world's race. They have had to contend with high wages and a lack of good workmen, they have therefore been forced to exercise their inventive faculties to make machinery that will cheaply and effectively perform the work required to be done, and this house held to be a model in its line, has done its share in thisgreat work by its perfection of the tools required to make these machines." William Sellers & Company (Incorporated) are now engaged among other works in building the large gun lathes for the United States Navy Yard, Washington, for 16 and 14 inch rifled guns. These are not only of the largest that have ever been designed for such uses, but embody features which in the judgment of engineers make them superior to any lathes before produced for modern guns. Many of the machines above mentioned have been recently greatly improved, and there have been addeel several important tools, among them the tool grinding and shaping machine, and the drill grinding machine with drill pointing attachment. This great industrial works was incorporated in 1886, and is now presided over as follows: William Sellers, president and engineer; John Sellers, Jr., vice-president and treasurer; Justus H. Schwacke, secretary; J. Sellers Bancroft, manager; D. L. Lukens, purchasing agent. |
| QUELLE | [Philadelphia and popular Philadelphians (1891) 107] |
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