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Publication numberUS3762089 A
Publication typeGrant
Publication dateOct 2, 1973
Filing dateJun 24, 1971
Priority dateJun 24, 1971
Publication numberUS 3762089 A, US 3762089A, US-A-3762089, US3762089 A, US3762089A
InventorsMeyer H
Original AssigneeWilliam E Cummings
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Self-ejecting safety device
US 3762089 A
A self-ejecting safety device for use with all external hammer firearms as for example, automatic pistols, which is designed to render such firearms absolutely safe to carry with a round of ammunition in the firing chamber.
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Description  (OCR text may contain errors)

United States Patent l Meyer, Jr. I Oct. 2, 1973 [54] SELF-EJECTING SAFETY DEVICE l,072,335 9/1913 Kunv l .i 42/70 F 3,157,958 ll/l964 Lewis 42/70 F [75] Inventor: Herbert Meye" 3,482,348 12/1969 Zanchi 42/66 Jeffersontown, Ky.

[73] Asslgnee: William Cummings Primary Examiner-Benjamin A. Borchelt leffersomown Assistant ExaminerC. T. Jordan 22 il June 24 1971 Attorney-William R. Price [21] Appl. No.: 156,258

[57] ABSTRACT [52] Cl 472/70 42/66 A self-ejecting safety device for use with all external [51] Int. Cl. i F41c 17/06 hammer firearms 5s p adtdmauc P [58] Field of Search 42/70 F, 66 which is designed m render such firearms absolutely [56] References Cited safe to carry with a round of ammunition in the flrlng chamber. UNITED STATES PATENTS 109,5l4 11/1870 Hay 42/70 F 7 Claims, 4 Drawing Figures r! l ii-4o I l 14 l I l l i I IQ lv:///7/'1/I1'I/,

win/ml Z 9 i' i l \QUQM and housing retainer 6. The hammer strut 9 is connected at one end with main spring cap 8 and at the other end to the hammer 10. Hammer base 11 engages with the sear 13 which is controlled by sear spring 12. The hammer l normally contacts the firing pin stop 14 and strikes the firing pin which is retracted by firing pin spring 16. The chamber 19 located behind the barrel 23 is pushed by means of slide 22 into position over the magazine, when the firearm is in recoil position so as to charge a cartridge to the firing chamber 19 and eject the spent shell therefrom. The link 20 and the link pin 21 link the members together. The recoil spring 30 guided over recoil spring guide 31 is held in position by means of plug 32. The barrel bushing 25 allows easy reciprocation of the slide mechanism over the barrel 23. The front sight 24 is on slide 22 in alignment with rear sight 17. The trigger 33 is pulled backwardly to coaet with the sear assembly and thus disconnect the hammer from full or half-cock position. The trigger guard is designated by numeral 34 and the magazine catch by numeral 35.

Referring now to FIG. 4, the self-ejecting safety device is designated generally by numeral 40 and has a top 41. The device tapers along front and rear faces 42 and 45 to a generally wedged shape. The front face 42 contains a recess 43 which fits generally over the head of the firing pin and thus protects the firing pin from contact with the hammer l0. Projecting feet 44 engage with the bottom of the firing pin stop 14 and thus tend to hold the safety device in position in abutment with the firing pin assembly when the device is at safety position. The back face 45 is in contact with the hammer and the hammer pressure pushes the device forwardly so that the front face 42 is in engagement with the firing pin stop 14. Thus the self-ejecting safety device is held in position by the engagement of the projecting feet 44 with the firing pin stop and by the hammer pressure. A first bore 50 vertically disposed in the body of the selfejecting safety device, provides a housing for spring 53. A second bore 52 opens into the floor 51 of the first bore and provides a slidable passageway for pin 60 so that the head 63 of said pin fits against the floor 51 and against the bottom of the spring 53. The shaft 62 of the pin extends through the bottom of the safety device 40 and is in engagement with the base 11 of hammer when the device is loaded into safety position. Thus as the shaft 62 is pushed downwardly against the base 11 of the hammer, the head 63 is biased against the spring 53 held in position at the top by set screw 55 engaged with threads 54. The self-ejecting device is thus securely engaged in position through the projecting feet 44 and the pressure of the hammer 10 in safety position with the hammer only slightly pulled back to less than half-cock position. Now, when it becomes necessary to fire the firearm, the hammer is pulled back into full cock position by the thumb and the self-ejecting safety device ejects through the coaction of the shaft 62 and spring 53 against the base of the base 11 of hammer 10. Thus the device 40 is completely out of the way when the trigger 33 is pulled and the firearm is fired by contact of the hammer 10 with the firing pin 15. The safety device 40 is securely held in safety position by the hammer pressure and by the projecting feet 44 in engagement with the bottom of the firing pin stop 14. Nevertheless, should the device become disengaged, the hammer is pulled back such a small amount that the possibility of the firearm firing is very remote. Further,

since the hammer is only pulled back slightly, the tension on the main spring 7 is so little that essentially no fatigue on the spring is encountered. The body of the self-ejecting member 40 is preferably fabricated of a resilient plastic material such as nylon or polyethylene. However, it is within the scOpe of this invention to use other materials such as soft metals and even wood as the material of fabrication of this device.

Many modifications will occur to those skilled in the art from the detailed description hereinabove given, and said description is meant to be nonlimiting except so as to be commensurate in scope with the appended claims.

I claim:

1. A self ejecting safety device, for use with a gun having a firing pin, a firing pin stop and an external hammer, and, which, in safety position, renders a loaded gun harmless, by holding said hammer out of contact with the firing pin of said gun, said safety device comprising:

A. a blocking member,

1. said blocking member, when in safety position, fitting between said hammer and said firing pin and being held in safety position adjacent to said firing pin by the pressure of said hammer; and,

8. self ejection means for ejection of said device.

when said hammer is pulled back.

2. A self-ejecting safety device, as defined in claim 1,

in which:

A. said blocking member is wedged-shaped and is fabricated of a resilient material.

3. A self-ejecting safety device as defined in claim 1,

the improvement in which:

A. said blocking member has a recess in one of its faces, said recess fitting over the head of said firing pin when said device is in safety position.

4. A self-ejecting safety device, as defined in claim 1,

in which:

A. said blocking member includes a projecting foot at the bottom, for engagement with the lower edge of the firing pin stop when said blocking member is in safety position.

5. A self-ejecting safety device, as defined in claim 1,

in which said self-ejection means comprises:

A. a spring mounted in the body of said blocking member; and

B. a retractable shaft in operative relation with said spring 1. one end of said shaft projecting from the body of said blocking member when said shaft is in extended position.

2. said shaft retracting into body of said blocking member to compress said spring when the end of said shaft is loaded against the base of said hammer.

6. A self-ejecting device, as defined in claim 5 in which:

a. said body of said blocking member contains a first bore disposed along its longitudinal axis for provision of said spring, and

b. a second bore of smaller diameter than said first bore in alignment with first bore and extending from the bottom of said blocking member to open into the floor of said first bore for the provision of said shaft.

7. A self-ejecting device, as defined in claim 6, in


a. the upper end of said shaft terminates in a flat head which lies in abutment with the bottom part of said spring.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US109514 *Nov 22, 1870 Improvement in gun-locks
US1072335 *Feb 14, 1913Sep 2, 1913Louis F KunzAttachment for firearms.
US3157958 *Feb 27, 1963Nov 24, 1964Browning Ind IncHammer safety for fire arms
US3482348 *Feb 8, 1968Dec 9, 1969Forjas Taurus Sa Ind E ComerciAutomatic hammer safety for revolvers
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4501081 *Sep 29, 1982Feb 26, 1985Izumi Michael TDry fire unit
US5704152 *Oct 22, 1996Jan 6, 1998Martin HarrisonSecure, quick release safety gun lock
US6305114 *Mar 11, 1999Oct 23, 2001Saf-T-Hammer IncSafety hammer for a firearm
US6530168 *May 3, 2001Mar 11, 2003Israel Military Industries Ltd.Safety mechanism for a handgun
US6691445 *Jan 11, 2001Feb 17, 2004Springfield, Inc.Disablement mechanism for a firearm
US6889459Oct 14, 2003May 10, 2005Alfred W. SalvittiModel 1911 type firearm safety lock
US7832135Jan 14, 2008Nov 16, 2010Springfield, Inc.Model 1911 type firearm safety lock
US8434255 *Jan 18, 2007May 7, 2013Steyr Mannlicher Holding GmbhBreech block for a drop-down barrel weapon
US20010016999 *Jan 11, 2001Aug 30, 2001Williams Charles DavidDisablement mechanism for a firearm
US20050086845 *Oct 14, 2003Apr 28, 2005Salvitti Alfred W.Model 1911 type firearm safety lock
US20050268512 *May 9, 2005Dec 8, 2005Salvitti Alfred WModel 1911 type firearm safety lock
US20110083352 *Jan 18, 2007Apr 14, 2011Steyr Mannlicher Holding GmbhBreech block for a drop-down barrel weapon
U.S. Classification42/70.8, 42/66, 42/106
International ClassificationF41A17/20, F41A17/00, F41A17/74
Cooperative ClassificationF41A17/20, F41A17/74
European ClassificationF41A17/74, F41A17/20