US354890A - dickeeman - Google Patents

Description

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(No Model.) 2 Sheets-Sheet 1.

A. DIGKERMAN.

BRBEGH LOADING FIRE ARM. No. 354,890. Patented Dec. 28, 1886.

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A. DIOKERMAN.

BREBGH LOADING FIRE ARM. No. 354,890 Patented Dec. 28, 1886.

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UNITED STATES AMOS DICKERMAN, OF NEW HAVEN, CONNECTICUT, ASSIGNOR OF ONE-HALF PATENT OFFICF.

TO CORNELIUS PIERPONT, OF SAME PLACE.

BREECH-LOADING FIRE-ARM.

i SPECIFICATION forming part of Letters Patent No. 354.890, dated December 28, 1886.

Application filed June 30, 1866. Serial No. 906,743. (No model.)

To all whom it may concern.-

Be it known that I, Amos DIOKERMAN, a citizen of the United States, residing in New Haven and Stateof Connecticut, haveinvented a new and useful 'Improvement in Breech- Loading Fire-Arms, of which the following is a specification.

My invention relates to that class of breechloading fire-arms in which the hammer is inclosed with the firing mechanism and operated by an external lever which disengages the barrel from the breech-block.

The improvement consists in the novel construction and arrangement of the hammer and safety-plate and their operating-cams, and in the means for limiting theswing of the barre1,as hereinafter more fully described and claimed.

In the accompanying drawings,- Figure 1 is a side view of the breech-block or receiver of my improved fire-arm with its cover or capplate removed, and Fig. 2 is a view of the same without the safetyplate, and showing the cam-shaft thrown back. Fig. 3 is a front or face view of the hammer. Fig. 4 is a horizontal section on the line 0:, Fig. 2. Fig. 5 is a view of the safety-plate, and Fig. 6 is a plan view of the trigger and safety-plate. Fig. 7 shows part of the breech-block with the barrel swung open therefrom. Fig. Sis a plan vie of the part of the breech-block in which the barrel is hinged; and Fig. 9 shows a trans verse section of the barrel on the line :0, Fig. 7.

Referring to the drawings, A designates the breech-block or receiver,which isrecessed in the usual manner to form a case for the reception of the hammer and other parts of the lock. The hammer Bis pivoted upon a stud or pin, 0, Secured in the side of the caseor receiver, and is adapted to oscillate or swinglengthwise thereof, with the striking part or head uppermost and in line with the firing-pin e. The hammer is actuated by a looped maiuspring, 9, arranged in the rear part of the receiver, with th per and longer arm connected by a link, it to ouble forked o'r divided spur or hook, f, on the rear side of the hammer, near thepivot O. The trigger notches or bentsz' are formed in the lower edge of the hammer, directly beneath the pivot. The trigger D is pivoted to the side of the receiver under the mainspring,

and has a rear arm, n, upon which the lower or short arm of the mainspring bears, thus serving both as trigger-spring and hammerspring. The trigger has a projecting arm or pointedspur, m, which extends forward under the hammer, and is adapted to springinto the trigger-bents z',operated by the force of the maiuspring.

The trigger-arm'm is about half as wide as the space in the receivercase, and rests against the back wall thereof, and the lower part of the hammer is formed of corresponding width, as shown in Fig. 3. Aprojecting lip or ledge, 1', is formed on the front side of the trigger integral with the arm m, and a safety-plate, t, is

forward by means of the finger which pulls the trigge I The safety-plate, with its neck and knob,

are formed in one piece,which is placed in the case when the cover is removed, and held in position by the cover 'when it isscrewed down upon the case. Two inclines, 0, are formed in the safety-plate on the side adjacent to the receiver-cover, and a spring, 11, is secured at one end to the trigger and adapted to bear at its opposite end upon the inclines on the platei The forward incline is made of such an angle that the pressure of the spring upon it draws the plate backward, and the rear incline is made'so steep that the spring, when acting thereon, will hold the plate forward. The plate is made of suflicient thickness to exactly fillthe space between the ledge and the, bottom wall of the case when the hammer is cooked, the trigger-bents being so formed that the arm m is at its highest point at such posi- 5 tion.

L represents the vertical cam-shaft journaled in the case, which carries the cams for operating the lock mechanism.

I represents the bolt which locks the barrel 1o:

and breech-lock, and is disengaged by the action of-the cam or arm C when the cam-shaft is thrown'back, as shown in Fig. 2.

The cam-shaft is operated by means of the external lever, E, upon the upper side of the breech-block. The hammer is cooked by cam or arm won the cam-shaft just below the'firingpin. The face of the hammer where the cam engages it is beveled, as shown at y in Figs. 3 and 4, to insure an easy lift of the hammer, and the friction of the cam on the hammer is reduced bya suitable friction-roll,w'. A earn, 0', is carried at the lower end of the cam-shaft, and is adapted to throw the safety-plate backward until the highest part of the inclines 0 passes under the end of the spring 10. The shaft carriesa cam, d, at its upper end, engaged by a spring, 0, which returns the carnshaft to its forward position automaticall after the gun has been cocked. 4

Fig. 7 shows the barrel ofthe gun hinged to the breech-block and swung open. The tongue or part m, which has the bolt-notches n, is formed with a countersink or recess, 0", in one side, and a pin,-u is inserted through the side of the breechblock, with its end received in the recess. The pin limits the movement of the barrel when its breech end is swung upward to insert the cartridge. The

recess may be milled into thetongne m, which is not thereby materially weakened.

In operation, as the cam shaft is turned backward to the position shown in Fig. 2 the cam w cooks the hammer, the cam G withdraws the barrel-bolt I and disengages the barrel to permit the insertion of the cartridge, and the cam 1- throws the safety-plate t backward until the spring prests upon the forward incline, o. The spring then draws the plate under the ledge 1' at the instant that the trigger-arm msprings into the rear bent, i, on the hammer. When the leverE is released, the spt'ing e returns the cam-shaft to place. In this position the gun is cocked, but cannot be fired until the safety-plate is pressed forward.

from under the trigger-ledge, which action maybe performed by the finger which operates the trigger.

I claim as new, and desire to secure by Letters Patent- In combination with the trigger and the trigger-locking plate provided with the inclines o 0, substantially as described, the spring carried by the trigger and having its end so situated as to engage the inclines on the plate, substantially as and for the purpose described.

AMOS DICKERMAN.

- Witnesses:

WALTER POND,

JONATHAN W. Porn).

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