Patent: Otis Cole

US 171506
gas eject


Specification forming part of Letters Patent No. 128,506, dated December 28, 1875; application filed November 20, 1875.

To all whom it may concern:

Beit known that I, Otis F. Cole, of Norwich, in the county of New London and State of Connecticut, have invented a new and useful Improvement for Extracting Shells from Revolving Fire-Arms, which improvement is fully set forth in the following specification, reference being had to the accompanying drawings.

The nature of my invention consists in providing means for automatically throwing out an empty shell from one chamber by firing off another one of the chambers in the cylinder of a revolver. In the present instance it is done by allowing a small portion of the gas generated by the burning of the powder to be conveyed into the muzzle end of the chamber containing the empty shell to be thrown out.

In the drawings, Figure 1 shows a side view of the pistol and its attachment for throwing out the shell. Fig. 2 shows a longitudinal section of the same. Fig. 3 is an end view of the chambers of the cylinder, with the device for carrying the gas from the barrel being discharged to the one containing the empty shell. Fig. 4 is a cap with small groove, which takes the escaped gas from a small notch in the end of the barrel proper, and also a piece, which rotates in a hole or bore in the center of the cylinder, and serves to confine the cap in place, as well as for a device to aid in throwing the cylinder out of place.

A is the barrel proper; B, the cylinder; C, the cap for guiding the escaped gas; D, the securing-piece; E, a groove for guiding the empty cartridge, so that it passes clear of the hand while being automatically thrown out.

In Fig. 3, e is the chamber supposed to be in process of discharge. b is the small groove in the cap C, which takes the gas escaping from groove a at the union of the barrel proper with the chamber of the cylinder, and conveys it into the muzzle end of the chamber f, which contains the empty shell to be thrown out. The piece D fits, by its pivotal tube F, in the central bore of the cylinder, and, by its small pin c, fits into the small hole d in cap C. The pin G, Fig. 2, passes through the tube F, and confines the parts, and when this pin G is removed the cylinder is rotated outward, and turns upon the guide end g of piece D. A small pin or screw, h, (seen in Fig. 2.) Secures this end g.

The ordinary parts of the pistol or rotating fire-arm in common use do not, of course need any minute description, as We have in this invention only to do with the devices by which the escaped gas, in firing one chamber, throws out the shell from another one.

The operation of these above-described devices is as follows: While the chamber e of Fig. 3 is being discharged the gas escaping through opening a at union of barrel proper and this chamber is conducted through the groove b into chamber f, aid this opening a allows just enough gas to escape to throw backward the empty shell from f. The conducting-plate C, by means of the parts D and F, with pine, is anchored or rigidly fixed, so that it remains always in proper position for each chamber as it rotates to position. The empty shell passes along groove or guide E, and is thrown off the hand.

I am aware that levers are arranged in breech-loaders so that tilting up the barrel retracts or throws out the shell; but I believe myself to be the first who has ever, by any means whatever, made the firing of one chamber throw out the shell of another. Of course, it follows that I am the first to, in any way, make the escaped gas of firing do this. I do not wish to limit myself to a claim for doing this by use of escaped gas.

The piece D and F, Fig. 4, is not necessary, as the plate C can be held in place without it by means of a small pin.

It is to be remarked that a pistol of this construction can be readily loaded without unshipping the cylinder. As fast as an empty shell is forced backward a charged shell or cartridge is slipped in through the guiding groove E. The rotation is then made a new chamber discharged, and the same loading repeated. Thus all the empty shells are disposed of and the cylinder kept with all the barrels or chambers but one loaded.

The putting in a single cartridge at a time without removing the cylinder takes, in the aggregate, much less time, and is less trouble some, than loading in the common way.

It is apparent that the guard to throw the shell away from the hand can be made separate from the stock, and removably attached thereto-as, for instance, by a dovetail slot.

Of course, this device is applicable to any fire-arm with a rotating cylinder or plurality of barrels.

It is evident that a series of spring-levers might be arranged so that, in firing, they might be tripped and the shell thrown out.

I wish to claim for my invention throwing out an empty shell by firing another barrel.

I claim the following as my invention:

1. In a fire-arm having a plurality of chambers or barrels, throwing out the empty shell by firing another chamber, all in the manner and by the means substantially as set forth.

2. In a fire-arm having a plurality of chambers or barrels, throwing out the empty shell by means of the escaping gas generated in firing another chamber, all in the manner and by the means substantially as set forth.

3. The cap-piece C with its groove b, combined with the two chambers and the groove at in the barrel, and any suitable arrangement for holding it in position, all as and for the purposes set forth.

4. The cap-piece C, combined with the securing-piece F D, with its pin c fitting in orifice d, all as and for the purposes set forth.


Allen Tenny,
G. W. Furness.