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B. H. Cramp & Co.
| Name | B. H. Cramp & Co. |
| Ortssitz | Philadelphia (Penns.) |
| Straße | York Street |
| Art des Unternehmens | Messinggießerei |
| Anmerkungen | Lage: York und Thompson Street. |
| Quellenangaben | [Philadelphia and popular Philadelphians (1891) 168] |
| Zeit |
Ereignis |
| 1885 |
Gründung |
| Produkt |
ab |
Bem. |
bis |
Bem. |
Kommentar |
| Bronzeguß |
1885 |
Beginn |
1891 |
[Philadelphia] |
|
| Messingguß |
1885 |
Beginn |
1891 |
[Philadelphia] |
|
| ZEIT | 1891 |
| THEMA | Beschreibung |
| TEXT | The great Brass and Bronze Foundry of Messrs. B. H. Cramp & Co., is not only the largest establishment of the kind in the United States, but the only one in America manufacturing what is known as manganese bronze, an alloy almost as strong as steel. The foundry is located at York and Thompson streets, Philadelphia, and the work includes brass and bronze castings of all kinds. The business was begun in 1885, exactly where the present buildings are now located. At the beginning the foundry was 30 by 60 feet, to day it is 65 by 125 feet with a lot 165 by 155 feet. At present there are 50 crucible furnaces with a capacity of 23.000 pounds, equaling at three melts per day 69,000 pounds of metal. One of the largest dimension pieces of brass ever undertaken by this or any other firm, was the main condensers for the United States Cruiser "Baltimore" and also for Cruiser No. 12, commonly known as the "Pirate". There are six castings for Cruiser "Baltimore", the combined weight of which is 12.604 pounds. A single brass casting weighing 4.317 pounds constitutes the main air pump for the "Baltimore". Up to the time that Messrs. Cramp & Co., commenced the manufacture of manganese bronze, all such work was imported. Now, the firm are turning out the very highest grade of this composition metal, and they call it the American. From it they have manufactured castings for screw propellers for two wheels each, for a number of United States vessels, among them the Vesuvius, Yorktown, Bennington, Concord, Baltimore,
Philadelphia, and Newark. Besides they have just added six spare blades for the above-named ships. Among other vessels may be mentioned the Mariposa and Torpedo Boat "Cushing". Throughout Europe this bronze is acknowledged as the most
efficient non-corrosive alloy for screw propellers. By practical demonstration the physical strength of the alloy made by this firm is shown to be more than equal to that of the English production. The tensile strength for castings averages over 50.000 pounds per square inch with an elastic limit of 35.000 pounds, thus enabling them to make propeller blades fully 20 per cent, lighter than iron or steel ones. It is of course impossible to say what difference this reduction in the weight of propeller blades makes in the speed of the ship, but the ocean greyhounds of to-day came in with the use of manganese blades. For instance, the steamship "Caracas" of the Red D. Line supplied with the manganese blades made her first trip in 24 hours less than any previous record. So gratified were her owners that they equipped her sister steamer "Venezuela" then building, with the manganese wheel. It is almost incredible, but Messrs. Cramp & Co. are prepared to show that the manganese wheels are even cheaper than the commonest grades of cast iron. It must certainly be a source of great gratification to ah Americans to recognize that the Messrs. B. H. Cramp & Co. have distanced all European manufacturers in the quality of their manganese bronze. The proprietors are practical brass founders, and to that fact they are proud to claim they owe their great success. They understand the most advanced requirements of modern furnace plants, and have the capital and energy to meet them. Thev invite an inspection of their foundry In all those interested in the progress of American metallurgical interests. The firm have now orders to supply a number of other merchant vessels, among them the Westerulaud and Noordland. The William Cramp & Sons, Ship and Engine Building Company, have made very severe tests of castings of manganese bronze, and the tables show the most satisfactory results. In a comparison of tests of castings of manganese bronze the subjoined figures are self-explanatory: At Zurich 41.250, English about 40.000, B. H. Cramp & Co.'s "Vesuvius" averaged 48.000. This firm have already received the order from the Cramp Ship Building Co., to supply manganese propeller wheels for all the
steam vessels now building at the yards of that firm including the men-of-war under construction for the Government. They have received from the William Cramp & Sons, Ship and Engine Building Co., reports upon seven tests made from castings furnished by them. |
| QUELLE | [Philadelphia and popular Philadelphians (1891) 168] |
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