US999209A - Ejector for firearms. - Google Patents

Description

L. H. COBB. EJEQTOB, FOR PIREARMS. APPLIOATION FILED MAY 29, 1909.

Patented Aug. 1, 1911.

FlQE.

LYMAN' I-I. COBB, OF FITCI-IBURG, MASSACHUSETTS, ASSIGNOR T0 MARY ELIZABETH JOHNSON, TRUSTEE, OF FITCl-IBURG, MASSACHUSETTS.

EJECTOR FOR FIREARMS.

Specification of Letters Patent.

Application filed May 29, 1909.

To all @07mm it may concern:

lie it known that l, LYMAN H. COBB, a citizen of the United States, residing at Fitchburg', in the county of ,Worcester and Commonwealth of Massachusetts, have invented a new and useful improvement in Ejec-tors for Firearms, of which the following a specification, accompanied by drawings forming a part of the same, in which- Figure 1 represents a side View of a pistol embodying an ejector mechanism containing my present invention, a portion of the frame having been broken away to disclose the ejector cam. Fig. 2 represents a side view of a portion of a pistol, showing the ejector plateasmoved away from the cylinder in the operation of withdrawing a cartridge. Fig. 3 is the same view as shown in Fig. 2, but with the ejector plate returned to its normal position. Fig. 4 is a side view of a portion of a pistol with thc cylinder in central sectional view, and showing the cartridge eject-- ing mechanism at the point of release of the ejector plate, and Fig. 5 is an enlarged view of the ejector cam partly shown in section.

Similar reference letters and figures refer to similar parts in the different Views.

My present invention relates to an improvement in the cartridge eject-ing mechanism of a break-down firearm and my invention is illustrated in the accompanying drawings as embodied in a revolver.

It relates particularly to that partof the mechanism which is lrnown as the ejector cam, and it consists in t-he employment of a spring actuated plunger' carried by the ejector cam and applied to the pivotal pin upon which the cam rocks, for the purpose of restoring the cam to its normal position, in which the cam shoulder will engage the frame of the firearm as the latter is broken down.

Referring to the accompanying drawings, 1 denotes the frame of a pistol and 2 the barrel pivoted upon the frame by a pivotal pin 3 in the usual manner in firearms of this class.

4 is a rotatable cartridge cylinder having cartridge chambers which are successively brought into alinement with the breech 5 of the barrel, in position to be discharged by the hammer 6. The cylinder 4 rotates upon a hollow sleeve 7 containing a sliding ejector rod S, provided at one end With a notched ejector plate 9 which normally rests in a recess 10 in the end of the cylinder, and engages the flanged heads of the eartridges as they are held in the chambers 11 of the cylinder. A spiral spring 12 is applied between the cylinder and a shoulder 13 of the ejector rod to hold the ejector plate 9 in the recess 10. The opposite end of the ejector rod 8 rests against a projecting tooth 14 upon a rocking ejector cam 15 held upon, the pivotal pin 3, which passes through an elongated opening 16 in the cam in order to allow a slight sliding movement of the cam upon the pivotal pin 3.

lDressing against the pivotal pin 3 is a plunger 17 having a stem 1S provided with a head 19, which prevents the plunger from falling out when the cam is removed. The cam is provided with a chamber 20 to receive the plunger 17 and also with a radial hole litting the stem 1S, and is counterbored upon the outside of the cam to receive the head 19. Between the outer wall of the chamber 20 and the plunger 17 is a spring 21, which incloses the stem 18 and presses the plunger 17 against the pivotal pin 3. The cam 15 is provided with an eccentric cam surface 22 and also with a radial shoulder rllhe barrel is provided with a projection 24 which, as the barrel is rocked on the pivotal pin 3, slides over the cam surface 22 and slides the cam on the pivotal pin 3 from the position shown in Fig. 1 to that shown in Fig. 4.

During the rocking movement of the barrel about the pivotal pin 3, the cam 15 is held from rotating by the contact of the shoulder 3 with the frame 1 of the firearm, as shown in Fig. 2, and the pressure of the tooth 14 against the ejector rod 8 forces the ejector plate 9 out of the recess 10 of the cylinder against the tension of the spiral spring 12. As the projection 24 approaches the shoulder' 23, it moves over the cam surface 22 and slides the cam 15 laterally on the pivotal pin 3 against the tension of the spring 21, until the shoulder 23 is released from the frame 1, thereby allowing the cam 15 to rotate, when the tension of the spring 12 ret-urns the ejector plate 9 to the recess 10 of the cylinder, bringing the parts into the position shown in Fig. 3. In Fig. 2 the cam 15 is shown as held from rotation by the contact of its shoulder 23 with the frame of the firearm. In Fig. 4 the shoulder 23 is represented as just being released from engagement with the trame 1 and in Fig. 3 the ejector rod 8 and ejector plate 9 are represented as having been returned to their normal position by the ejector spring 12 rotating the cam 15.

I am aware that an ejector rod and plate actuated by a toothed cam in withdrawing a cartridge shell Jfrom the cylinder, and returned by the tension of a spiral spring, are not new. One of the diiiiculties attending the use of an ejector mechanism of this class has been to control the lateral sliding movement of the ejector cam 15 upon the pivotal pin 3. Wlhen the barrel is returned from the position shown in Fig. 3 to that shown in Fig. 1, the contact of the projection 24 against the back side of the tooth 141 reverses the movement of the cam 15 and brings the shoulder 23 outside the frame, but/ unless the spring 21 is certain in its action, the shoulder 23 is not moved downward into position to engage the frame when the firearm is again broken down. It is the object of my invention to control the movement of the cam so as to render its action certain in ejecting the cartridges. l accomplish this object by providing the cam 15 with a radial chamber 2O containing the spring 21 and plunger 17, as above described. 1When the barrel has been restored to its normal position in the frame, as shown in Fig. 1, the shoulder 23 will have been been brought outside the end of the frame by the contact of the projection 241 with the tooth 14. As soon as this occurs,` the tension of the spring 21 acting against the plunger 17, which rests against the pivotal pin 3, will force the cam 15 laterally in the direction of the arrow 25, Fig. 1, thereby moving the shoulder 23 radially outward in position to contact with the end of the frame and hold the cam 15 from rotation as the pistol isI again broken down.

I claim,

1. In a cartridge ejector mechanism, an ejector cam capable of a slight lateral movement on a pivotal pin, a plunger having a head carried in a chamber in said cam and pressing against said pivotal pin, a stem for said plunger inclosed in a radial hole in said cam, and a spiral spring inclosing said stem and between the outer wall ot said chamber and the head of said plunger.

2. In a cartridge ejector mechanism, an ejector cam capable of a slight lateral movement on a pivotal pin, a plunger having a head carried in a chamber in said cam and pressing against said pivotal pin, a stem inclosed in a radial hole in said cam'and a second head in a counterbored recess in said cam outside of said radial hole, and a spiral spring inclosing said stem and between the outer wall of said chamber and the head ot said plunger.

3. A rocking cam for a cartridge ejector mechanism capable of a slight sliding movement on a pivotal pin, means for moving said cam in one direction, comprising a plunger 17 held in a chamber 20 in said cam and in contact with said pin, a stem 18 for said plunger passing through said chamber 2O and through a radial hole in the outer wall of said chamber and provided with a head 19, and a spring 21 inclosing said stem 18 between the outer wall of said chamber 2O and said plunger 17.

Dated this 25th day of May 1909.

LYMAN H. COBB.

Witnesses:

RALPH H. FALEs, ARTHUR H. BROWN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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