Patent: Henry S. Rogers – Eli Whitney

British 1136
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LETTERS PATENT to Henry S. Rogers, of New Oxford Street, in tlie County of Middlesex, for the Invention of “ Improvements in Fire-arms.” —A communication from Eli Whitney, of the United States of America. Sealed the 22nd August 1854, and dated the 22nd May 1854.

(Void by reason of the Patentee having neglected to file a Specification in pursuance of the conditions of the Letter’s Patent.)
PROVISIONAL SPECIFICATION left by the said Henry S. Rogers at the Office of the Commissioners of Patents, with his Petition, on the 22nd May 1854.

I, Henry S. Rogers, of New Oxford Street, in the County of Middlesex, do hereby declare the nature of the Invention for “ Improvements in Firearms ” to be as follows:—

This Invention has for its object “ Improvements in Fire-arms ” where several breeches are used in combination with a single fixed barrel, the several breeches revolving to bring them in succession opposite the fixed barrel. For this purpose, the frame to which the fixed barrel is screwed is formed with an opening through it to receive the several breeches or chambers for the charges. The back end of the metal frame is made to form part of the stock, and in it arc fixed the main spring, and also a spring which acts on the sear, which is formed in one piece with the locking bolt, which locks the revolving chambers and prevents movement at the time of the discharge. The locking bolt and sear is acted on by the spring, above mentioned, and another at the fore part of it, and by the arrangement and form of the sear and locking bolt the hammer is prevented acting except when properly cocked. The several breeches are placed on a moveable axis, which passes through the fore part of the frame and into the back part thereof, and is locked securely in its place when forced into position by means of a catch acted on by a spring. The trigger has a projection in front, which is acted on by a spring, tending to bring the trigger forward; and the trigger, has a projection backward, to which a finger or driver is attached by a pin, and it is by this driver acting against ratchet teeth that the breech chambers are caused to revolve. The driver is pressed constantly forward by a spring.. The main spring enters a notch or recess in the lower part of the hammer, and the hammer is prevented coming against the nipple by coming in contact with the upper part of the frame. The barrels and breech chambers are made, by preference, of cast steel.