US433262A

US433262A - Breech-loading breakdown gun

Info

Publication number: US433262A
Authority: US
Current assignee: Bath Unlimited Inc
Publication date: 1890-07-29
Anticipated expiration: 1907-07-29

Description

(No Model.) 2 Sheets-Sheet 1. A. E. WHITMORE. BREEGH LOADING BREAKDOWN GUN.

Patented July 29, 1890.,

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A. E. WHITMORE. vBRBBGH LOADING BRBAKDUWN GUN.

No. 483,262. Patented July 29, 189,0.A

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UNITED STATES PATENT OFFICE.

ANDREW E. VHITMORE, OF BOSTON, MASSACHUSETTS.

BREECH-LOADING BREAKDOWN GUN.

SPECIFICATION forming part of Letters Patent No. 433,262, dated July 29, 1890. Application led January 27, 1890. Serial No. 388,269. (No model.)

To all whom t may concern:

Be it known that I, ANDREW E. WHITMORE, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Breech-Loading Fire-Arms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This invention relates to breech-loading fire-arms, more particularly that class termed internal-hammer guns.

My present invention may be considered as pertaining to a similar class of re-arms underLetters Patent No. 386,174, issued July 17, 1888, to myself.

The said invention relates, chiefly, to improvements in mechanism for locking and unlocking the triggers, and compensating for wear in the breech-block. Moreover, l have introduced improvements in the train of parts by which the extractor is operated and. the

hammers cocked in the act of opening the weapon.

The improvements in which said invention consists will be hereinafter particularly set forth and claimed.

The drawings accompanying this specification represent, in Figure l, a longitudinal vertical sectional elevation in part of an internalhammer gun embodying my invention, such weapon being closed and the hammers down, but with the triggers free to move. Fig. 2 is a similar view showing the weapon open and with the triggers blocked, while the hammers are cocked. Fig. 3 is a side elevation of the front end of the breech-block containing the joint circle. Fig. fi is a sectional plan of the same, showing the tapered compensating pin. Fig. 5 is across-section of said pin. Fig. 6 is a side elevation of the trigger and Sear, showing the adj Listing-screw for causing positive engagement of the two.

In the above class of fire-arms several of the operating elements which go to form. the same are so arranged that upon movement of the top lever and breaking of the weapon the hammer or hammers are cocked. Consequently when the weapon is closed it is in readiness to be immediately discharged. j

One object of my invention is to prevent premature discharges and accidents occasioned by carelessness or negligence in not moving the thumb-slide to block the triggers or hammers, as the case may be, and after the weapon has been closed, at which time the hammers are cocked.

To obviate such accidents and to automatically bloek the triggers upon opening of the weapon, and prior to the act of cooking the hammers occasioned by such opening, is the primary object of this invention.

The drawings represent the rear part of the barrels at A, the breech-block at B, the extractor at O, fore-end at D, and joint circle at E. The hammer is shown at a, the cookinglever at h, cooking-pin at o, connecting-lever at d, and the extractor-lever at e, pivoted to the fore-end D, and actuated by a push-pin f through the agency of the joint circle.

, In my previous invention the connectingrod (l had sliding motion in the stem of the extractor. In the present instance I have made a connecting-lever CZ, and pivoted it to the extractor-stem, the latter being slotted to contain it. Moreover, I have rendered the cooking-pin c spring-actuated, as follows: Transversely theieof and toward the lower end is placed a pin g, securely fixed in the barrel-lug. The upper end of the cooking-pin is recessed at h, and contains a springt', which bears against the pin g as a fixed point, While the tension of such spring is exerted against the upper closed end of the cooking-pin; hence upon closing of the weapon the spring acts to retract the cooking-pin and disengage it from the nose of the cooking-lever to permit the hammer to fall when a pull on the trigger occurs. Thus in practice I find the above train of parts works very satisfactorily, since by pivoting the connecting-lever d and operating the extractor-lever e by means of the push-pin f the parts are operated more easily. The action of these parts is as follows:

IOO

After discharge of the Weapon the relative y position of the parts is as indicated in Fig. 1,. In the act of breaking the Weapon the joint circle thrusts the push-pin f outwardly against the pivotal end of the extractor-lever, while the free end of the latter swings rearwardly. At this time it wipes against the connectinglever CZ and the end of the extractor-stem, which latter is actuated to discharge the empty shells. lVith this act the connecting-lever d is rocked against the cocking-pin, and the latter is advanced slightly and held rigidly against the ends of the cocking-lever while the hammer is being raised.

` To block the trigger prior to cooking of the hammers in the act of opening the weapon, is, however, one of the primary features of this invention. I propose to accomplish this by means of the locking-bolt 7o, the eccentricshaft l, lever F, and an intermediary rod m, which actuates operating mechanism to the thumb-slide. The lever F, its swinging block and bolt are arranged as usual; likewise the slide G, positioned in rear of the lever F. Interiorly of the breech-frame and pivoted thereto is disposed a forked or bell lever fn, one arm of which engages beneath the thumbslide G, or safety, so called. The other arm enters laterally of the stop p, pivotally affixed upon the breech-frame. Pendent from this stop is a lug or finger r, which is adapted to swing over the top of the rear end of the trigger or triggers and block them at intervals of time, as desired, and controlled by the thumbslide.

To actuate the stop p to block the triggers and place the thumb-slide at safety coincident with the withdrawal of the locking-bolt in the act of breaking down the weapon, I have interposed the intermediary rod fm, which at one end engages a slot s, cnt in the rear extremity of the locking-bolt, and at the other end rests against the front face of the pendent lug fr on the stop. Thus, upon retracting the locking-bolt by means of the eccentric-shaft and its lever F, the rod m is pushed rearwardly, and a positive motion is imparted to the stop p, which is rocked to place the lug r above the rear end of the trigger or triggers. Such action has rocked the bell-lever n and caused the thumb-slide Gr to be placed at safety. Vhen the weapon has been loaded and closed, the hammers are at full-cock; but the triggers have been automatically blocked and will so continue until the thumb-slide is removed from its position of safety. At this time reverse rocking of the bell-lever n occurs, when the pendent lug 'r is swung forward to release the triggers. Simultaneouslythe rod m is thrust forward, andis now in readiness to repeat its previous function should the locking-bolt be moved. From this it is evident that the weapon is perfectly safe, since the triggers are blocked and the thumb-slide at safety every time the weapon is opened.

The other prominent feature of my invention consists in mechanism for obviatin g wear between the ends of the barrel and the face of the breech-block to prevent escape of gas. In Figs. 3 and 5 I have shown such mechanism, which consists, primarily, in a compensating pin transversely through the front end of the breech-frame. rlhis pin is shouldered, as shown in Fig. 5 in cross-section, to prevent its turning or shifting axially. Further, the front side is straight or parallel with the end of the breech-frame, while the rear surface is tapered and bears in part against the end of the barrel-lug H, pendent beneath the barrels. This compensating pin is bored lengthwise, and is adapted to receive end adjusting-screws @c laterally disposed in the breech-block. Moreover, since axial rotation of the pin t is stopped movement of the screws by advance of one or retreat of the other will cause the compensating pin to have right-line movement, and since the barrel-lug His in contact with the tapered portion of the pin the barrels are readily adjusted against the breech-block to compensate for any wear and to prevent gas-vent.

The last feature of my improvements is embodied in a compensating device whereby the hammer, when being thrown back, is caused to strike the upper portion of the sear in order to lift the nose ofV the latter and effect a positive engagement of said scar with the full-cock notch of the hammer. As shown in Fig. 6 of the drawings, I have cast or formed a horn e on the upper part of the sear I and to the rear of its pivot. This horn is in proximity to the back of the hammer when the latter is at full-cock. Transversely of such horn I have inserted an adjusting-screw y, which can by turning be made to project more or less toward the hammer. By such means the hammer, when in the act of being thrown back and just before the sear engages with the full-cock notch, strikes the screw y in the scar. As a result the nose of the sear is brought positively against the hammer, and when the full-cock notch is reached the sear cannot fail to enter and engage said notch.

1. The combination, with thelever, its rotating eccentric-shaft, the locking-bolt, and the triggers, of the stop pivotal above the trigger, the pendent lug from said stop, and the intermediary rod which interconnects said locking-bolt and the pivotal stop to block the triggers in the act of opening the weapons, substantially as herein set forth.

2. In combination, the trigger or triggers, the pivotal stop with its pendentlug, the th umb-slid e,its ro ckingbell-lever, which serves to unite the thumb-slide with the stop, the snap-lever, its eccentric-shaft and lockingbolt, and the intermediary rod by which the locking-bolt positively actuates the pivotal stop to block the trigger or triggers, substan-V tially as and for purposes herein specified..

3. The combination, with the extractor, its operating parts, the fore-end, and the cond necting-lever pivotally in the extractor-stem, of a cocking-pin swinging with the barrel, receiving leverage action from the connectingr- IOO IIO

lever and having endwise movement in the barrel-lug to engage the cooking-lever, substantially as and for purposes stated.

4. In combination, the extractor, the eX- t-ractor-lever, its push-pin, the fore-end, and the connecting-lever pivotally in the extractor-stem, the spring-actuated cooking-pin .swinging with the barrel and having endwise movement'to engage the cooking-lever', said movement being produced by means of the connecting-lever (Z, substantially as' and for purposes stated.

5. The combination, with the fore part of the breech-frame and the barrel-lug therein, of the tubular compensating pin tapered upon the rear side and shouldered lengthwise to prevent axial movement, andthe end adjusting-screws by which the pin is shifted transversely of the barrel-lug, as and for purposes set forth and stated.

6. In lire-arms, the combination, with the sear and hammer, of a compensating screw adj ustably secured in said Sear and adapted to bring the Sear-nose and hammer positively into contact by the meeting of said screw with the hammer at a point to rear of the searpivot, substantially as herein set forth.

In testimony7 whereof I affix my signature in presence of two witnesses.

ANDREV E. VVIIITMORE.

Witnesses:

H. E. LODGE, FRANoIsC. STANWooD.