US3346983A

US3346983A - Automatic cartridge ejector device

Info

Publication number: US3346983A
Application number: US515381A
Authority: US
Inventors: Julius E Brooks
Original assignee: Olin Corp
Current assignee: Olin Corp
Priority date: 1965-12-21
Filing date: 1965-12-21
Publication date: 1967-10-17
Anticipated expiration: 1984-10-17

Description

Oct. 17, 1967 J. E. BROOKS AUTOMATIC CARTRIDGE EJECTOR DEVICE Filed Dec. 21, 1965 5 Sheets-Sheet -l INVENTOR' JUL/US E BROOKS Fay/wig ATTORNEY 0 1967 .J. E. BROOKS 3,346,983

AUTOMATIC CARTRIDGE EJECTOR DEVICE Filed Dec. 21,, 1965 3 Sheets-Sheet 2 INVENTORJ JUQUS E. BROOKS BY Kim ATTORNEY Oct. 17, 1967 J. E. BROOKS 8 AUTOMATIC CARTRIDGE EJEC'I'OR DEVICE Filed Dec. 21. 1965 5 Sheets-Sheet 5 FIG 4 INVENTOR. JUL/US E BROO/(S ATTORNEY United States Patent 3,346,983 AUTOMATIC CARTRIDGE EJECTOR DEVICE Julius E. Brooks, Branford, Conn., assignor to Olin Mathieson Chemical Corporation, a corporation of Virginia Filed Dec. 21, 1965, Ser. No. 515,381 1 Claim. (CI. 42-47) ABSTRACT OF THE DISCLOSURE A bolt action sear-trigger assembly operable independently of the conventional firearm sear-trigger assembly to effect a cartridge ejection function.

The present invention relates to firearms and relates in particular to an automatic ejector device.

The ejector device is especially suited to a firearm having a plurality of cartridge receiving chambers in that the device is operable to eject cartridges from a plurality of chambers automatically and simultaneously.

A further feature of the invention is the provision of an ejector device which is actuated automatically by a sear-trigger assembly which is separate and distinct from a second sear-trigger assembly such as ordinarily used in firing a firearm.

'A firearm ejector device embracing certain principles of the present invention may comprise a barrel member pivotally connected to a receiver member, said barrel member being movable relative to said receiver member, ejector means slidably mounted in the barrel member, spring means in the barrel member for moving the ejector means from a first position defining a firing position to a second position defining an ejection position, a sear means carried by the barrel member for holding the ejector means in the first position and an automatic trigger pivotally supported by the barrel member cooperating with the sear means and making a driving connection with the receiver member effective automatically to actuate the sear means to release the ejector means when the barrel member is pivoted relative to the receiver member.

Other features and advantages of the present invention will become more apparent from a study of the succeeding specification when read in conjunction with the appended drawings, in which- FIG. 1 is a side elevation of a firearm incorporating one embodiment of the invention illustrated in the firing position;

FIG. 2 is a similar View showing the firearm of FIG. 1 in an ejection position;

FIG. 3 is a top view of the illustration of FIG, 1;

FIG. 4 is a view similar to FIG. 1 with portions broken away to show the elements of the ejector device disposed in the firing position;

FIG. 5 is similar to FIG. 4 and shows the ejector device in the ejection position; and

FIG. 6 shows the hinged connection between the barrel member and the receiver member including the trigger support.

Referring now to the drawings, the barrel member is indicated generally by the reference numeral 11 and the receiver member is referenced 12.

The barrel member includes a block 13 which receives four symmetrically arranged barrels 14 held in alignment and in proper spaced relation by a plate 16.

The plate 16 functions additionally as a muzzle guard or shield to protect a shooters hand in that a margin of the plate 16 projects downwardly as indicated by the reference numeral 17.

ice

The upper portion of the plate 16 is fitted with a return bend portion indicated by the reference numeral 18 which, in combination with the member 19, define fixed sights.

Since the present invention is directed to a novel ejector device, the details of the firing or trigger end of the firearm will not be described in detail and only those elements necessary for an understanding of the invention will be detailed.

For example, the firearm includes a hand grip 19, trigger guard 21, trigger 22 and exposed single action hammer 23.

Referring now to FIG. 6, note that the receiver 12 formed with spaced

ears

24 and 26 is formed with aligned bores 27 and 28 operative to receive a hinge pin 29 which rotatably supports barrel member 11 in that

lugs

31 and 32, formed integral with the barrel member, are bored to receive and rotate relative to hinge pin 29. The bored lugs 32 are fitted with a bushing 33 making a press fit with the lugs and providing a support and pivotal mounting for a trigger 34.

Referring to FIGS. 4 and 5, it is apparent that the trigger 34 includes a sear engaging head 36 and a driving head 37. Coil spring 38, seated at one end against shoulder 39 formed by counterboring lugs 31 and 32 (as is most apparent in FIG. 6), is retained under compression in that the opposite end thereof engages head 37 and tends to drive trigger 34 in a coounterclockwise direction.

Slidably mounted in the block 13 of the barrel member 11 is an ejector means indicated generally by the reference numeral 41 comprising a bolt 42 carrying a stop pin 43 and formed with a collar as at 44.

The bolt is received in a bore 46 formed in the block 13 and is surrounded by a coil spring 47 seated at the left end as viewed in FIG. 4 at the bottom of the bore 46 and at the opposite end against collar 44. Coil spring 47 is under a compressive stress as viewed in FIG. 4 and sear means 48 is operative to engage an undercut 4? formed in the bolt so that in the arrangement shown in FIG. 4 the ejector means is shown in the first or firing position.

The right end of the bolt 42 (as viewed in FIG. 4) indicated by the reference numeral 51 is received in a counterbore 52 formed in the receiver and the cooperation between the end 51 and the counterbore 52 serve to retain the barrel member and the receiver member locked in the firing position.

Cam face 53 formed on end 51 cooperates with cam 54 to drive bolt 42 to the left to permit rotation of the barrel member relative to the receiver member whenever lock lever 56 (see FIG. 3) is rotated from the position shown in FIG. 1 to the position of FIG. 2.

The bolt 42 is fitted with a sleeve 57 having a flared or funnel-like end as indicated by the reference numeral 58.

The sleeve 57 makes a driving connection with bolt 42 as at 59 so that operation of the bolt from the position shown in FIG. 4 to the position shOWn in FIG. 5 moves the sleeve 57 to the right.

As can be observed in FIGS. 2 and 4, the cartridge receiving end or chambers indicated generally by the reference numerals 61 are each intercepted by a sector of the flared end 58 in that the rims of cartridges indicated by the reference numerals 62 overlay said arcuate sectors.

That is, when the firearm is in the condition shown in FIG. 4 cartridges disposed in the chamber 61 are received so that their rims are disposed in a mating counterbore and a portion of their rims overlay a sector of the flared end of sleeve 57. Thus, when the ejector means is unseared and driven by coil spring 47 the flared end 58 is operative to eject cartridges disposed in the chambers 6161 simultaneously.

The ejector device of the present invention operates in automatic fashion in the following manner:

Assume that the elements previously detailed are disposed in the position shown in FIG. 4 wherein the bolt 42 is seared by sear means 48 and actuating head 36 of the automatic trigger 34 engages the undercut 64 of the sear means.

Coil spring 38 bottomed in bore 39 is under compressive load and thus urges trigger 34 in counterclockwise direction about bushing 33.

Head 51 received in counterbore 52 is operative to retain barrel member 11 locked to receiver member 12.

Actuation of the lock lever 56 from the position shown in FIG. 1 to the position of FIG. 2 is effective to cause cam 54 to drive head 51 free of counterbore 52 permitting the firearm to break. During the course of the breaking action, barrel member 11 rotates relative to receiver member 12 with the result that lug 37 of triggger 34 engages the receiver member as at 66 to drive the trigger automatically in a clockwise direction as viewed in FIGS. 4 and 5 moving sear means 48 from FIG. 4 position to FIG. 5 position.

Upon this occurrence, bolt 42 is powered to the right and its stroke is limited by the engagement of cross pin 43 with the face of block 13.

Movement of the bolt to the right drives sleeve 57 to the right and the flared end thereof is operative to eject cartridges as shown in FIG. 2.

To return the barrel member and the receiver member to the fixed position, it is merely necessary to rotate the barrel member back to its original position and the face 65 of the receiver member is operative to cam the bolt head 51 and the flared sleeve 57 back into the barrel member to their firing position. Bolt 42 sears up automatically.

Force of spring 47 is effective to reset cam 54 and its operating lever 56.

It is anticipated that a wide variety of modifications and design changes may be devised in the disclosed embodiment without departing from the spirit and scope of the invention.

What is claimed is:

A combined barrel lock and ejector device for a firearm comprising a barrel member pivotally mounted to a receiver member, said barrel member being movable relative to the receiver member from a locked position to a second position defining an ejection position, bolt means slidably mounted in the barrel member, a counterbore formed in the receiver member operative to receive one end of the bolt means when the barrel member is in the locked position, spring means for urging the bolt means into the counterbore to lock the barrel member, cam means for driving the bolt means out of the counterbore to unlock the barrel member and ejector means carried by the bolt means and movable relative thereto, automatic sear means cooperating With the bolt means for limiting movement of the bolt means relative to the counterbore, trigger means cooperating with the sear means and the receiver member when the barrel member is in the open position effective to trip the sear means and release the bolt means to permit the spring means to drive the bolt means and the ejector means to effect a cartridge ejection function.

References Cited UNITED STATES PATENTS 285,993 10/1883 Gardner 4246 350,328 10/1886 Toggenburger 4246 526,690 10/1894 Davenport 4247 1,530,041 3/1925 Fearn 4247 2,108,130 2/1938 Lewis 4247 BENJAMIN A. BORCHELT, Primary Examiner.