Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS3624945 A
Publication typeGrant
Publication dateDec 7, 1971
Filing dateApr 13, 1970
Priority dateApr 13, 1970
Publication numberUS 3624945 A, US 3624945A, US-A-3624945, US3624945 A, US3624945A
InventorsDaniel J Foote
Original AssigneeMaster Lock Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Universal self-conforming trigger lock for firearms
US 3624945 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)



am 6 MM, J.

AT TORNLY United States Patent 3,624,945 UNIVERSAL SELF-CONFORMING TRIGGER LOCK FOR FIREARMS Daniel J. Foote, Wauwatosa, Wis., assignor to Master Lock Company, Inc. Filed Apr. 13, 1970, Ser. No. 27,684 Int. Cl. F41c 27/10 U.S. Cl. 42] Y 6 Claims ABSTRACT OF THE DISCLOSURE To protect the triggers of guns, rifies, pistols and various forms of firearms against accidental or unauthorized operation a firearm trigger lock is provided for detachable, self-conforming and non-shiftable mounting on the trigger guard portion of a firearm to enclose the latter and prevent unauthorized movement of the firearm. trigger. A cover section of the trigger lock carries a transverse cylinder shell and strategically located transverse, axially yieldable ptungers and other means designed to engage portions of the trigger guard and trigger to prevent movement of the latter and prohibit shifting of the trigger lock regardless of how it is mounted on the trigger guard. Moreover, the trigger lock is universal in respect to its adaptability to trigger guards of various shapes and sizes and the disposition of the trigger therein, permitting its use on firearms of various types.

BACKGROUND OF THE INVENTION AND SUMMARY THEREOF This trigger lock for releasable adjustable locking on the trigger guard of any conventional firearm is key-operated and includes a pair of laterally separated side sections or covers each having on its inner side a resilient pad with one of the sections termed the carrier section being formed with a plurality of transverse, strategically located, spring-loaded axially yieldable plungers, any of which can recede to no-interfering positions but which, in conjunction with a transverse pin cylinder shell, lodge in such relation to the firearm trigger and to the trigger guard, that the side sections or covers cannot be shifted on the trigger guard and the trigger is completely protected against unauthorized movement. The side covers of the lock can be mutually released and removed from the trigger guard to which they have been applied by an authorized possessor of the proper key which controls the pin cylinder mechanism within the transverse shell. The trigger lock of the present invention, besides being universal and self-conforming relative to the trigger guard of the particular firearm on which it is mounted, is detachable and portable.

The improved trigger lock includes a pair of complementary side elements or covers which have resilient pads (one of which may be tapered) which, when the trigger lock is applied to a firearm trigger guard, are squeezed and compressed through internal ratchet lever locking mechanism in the lock assemblage, whereby the trigger lock adjustably encloses the trigger guard in a manner so as to prevent access to the firearm trigger. The transverse cylinder shell and spaced-apart yieldable plungers carried by the carrier cover locate within the trigger guard in proximity to the trigger and guard in a self-conforming manner to prevent undesired shifting or movement of the lock assemblage.

The improved trigger guard is relatively simple in design and construction, is positive and fool-proof in use, may be applied in a plurality of positions to the trigger guards of various forms of firearms, is easily removable by one having the proper key, is portable, and is otherwise particularly well adapted for its intended purposes.

Patented Dec. 7, 1971 DESCRIPTION OF THE PRIOR ART The assignee of the present invention is the owner of the prior Foote Pat. No. 3,392,471 for Adjustable Trigger Locks for Firearms and of the Foote and Buchmann Pat. No. 3,422,560 for Adjusatable Gun Trigger Locks, but involves mechanism very different from the latter and is an improvement over the former in the provision of yieldable strategically positioned transverse plungers, a pad wedge and other elements which render the present trigger lock universal and self-conforming. Other prior art patents of which Bjorklund No. 2,664,658 is typical cover devices constructed to fit only one type of gun. As far as applicant is aware there is nothing presently available in the firearm trigger lock art having the adjustable, lockable side cover features of Foote No. 3,392,471 plus the strategically positioned transverse yieldable plungers to render the trigger lock non-shiftable on its trigger guard, self-conforming, and adaptable to trigger guards of various shapes and sizes and compensatory relative to the disposition of the trigger therein.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings wherein the same reference characters designate the same or similar parts in all of the views:

FIG. 1 is a side view of a pistol showing the improved trigger lock applied to the trigger guard in protective relation to the trigger, with part being broken away;

FIG. 2 is a horizontal sectional view through the trigger guard taken approximately along line 22 of FIG. 1 showing the trigger lock applied to the trigger guard, there being a broken line showing of one cover of the lock as separated from the other cover element,

FIG. 3 is a transverse sectional view taken approximately along line 33 of FIG. 1;

FIG. 4 is a fragmentary view of the trigger lock applied to the pistol trigger guard, as in FIG. 1, only with the complementary cover element removed to show one relationship of the yieldable plungers, cylinder shell, wedge and pad to the trigger and guard;

FIG. 5 is a view similar to FIG. 4 only with the pistol pointed in the opposite direction and showing an alternative mounting of the trigger lock on the trigger guard and the corresponding disposition of the trigger lock elements;

FIG. 6 is a detail, fragmentary sectional view through a yieldable plunger taken on line 6-6 of FIG. 5;

FIG. 7 is a plan view of the complementary cover element of the trigger lock looking at the pad carried thereby,

FIG. 8 is a plan view of the plunger and cylinder shell carrying insert of the carrier cover element of the trigger lock;

FIG. 9 is a longitudinal sectional view of the carrier cover insert taken on line 9-9 of FIG. 8; and

FIG. 10 is a sectional view of the trigger lock assemblage in its connected-together locked condition, the firearm trigger guard and trigger being omitted.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The improved trigger lock designated generally by the numeral 15 provides a detachable, portable lock or safety device to substantially enclose the trigger guard portion of a firearm of any conventional type, in blocking relation to the trigger and thereby prevent the accidental discharge of the loaded gun or the unauthorized use there of by a child, tamperer or other unauthorized person. It is also intended that the adjustable, self-conforming and detachable trigger lock be of a type to fit all of the trigger guards of conventional firearms, regardless of the location of the triggers therein and the trigger guard size, being applicable thereto in a self-conforming and non shiftable manner irrespective of the disposition of the lock on the particular trigger guard.

By the way of illustration the improved trigger lock is shown in relation to the trigger guard 16 surrounding the trigger 17 of a pistol 18. When the lock is applied to the trigger guard 16 the trigger 17 is completely covered and rendered inaccessible for manual manipulation. Also, certain elements forming parts of the improved lock assemblage are positioned in juxtaposition to portions of the trigger guard so that such shifting or movement of the lock assemblage on the trigger guard, as might be effective to actuate the trigger, is prevented.

As is best shown in FIGS. 2, 3 and 10 of the drawings the improved trigger lock includes a key-receiving carrier cover 19 there is interposed between its pad 21 and the decovers are adapted to be applied to the opposite sides of the trigger guard 16 of the firearm 18 and adjustably conform to the breadth of the trigger guard 16. The covers 19 and 20 are both of similar ovate shape and size and, as will hereinafter appear, when applied to a firearm trigger guard in any manner, they are adjustably and selfconformingly held and locked together in the desired degree of transverse separation by means which will hereinafter appear, similar in that respect to the Foote Pat No. 3,392,471. The cover 19 and 20 are of metal and the inner face of each is flanged to receive resilient pads 21 and 22 respectively. However, with respect to the carrier cover 19 there is interposed between its pad 21 and the depressed inner face of said cover, a metallic carrier insert 23 of a size and shape to fit within the flanged periphery 24 of said cover. As is best shown in FIGS. 8, 9, and 10 said insert 23 is formed with an integral transverse cylinder shell 25 which projects at its inner end into a boss 26 projecting from the exterior face of said cover 19. The shell 25 turnably houses a plug 27 whereby a key 28 inserted into a slot therefor accessible through an opening in the exposed end of the boss 26 actuates tumbler pins 29 which yieldably extend into the pin extension 30 anchored within the boss 26. The complementary cover 20 is formed on its face with a hollow boss 31, which, when the covers are united on opposite sides of the trigger guard 16, receives the extended end portion of the cylinder shell 25, as shown in FIG. 10, the pad 22 being apertured to permit said end portion of the shell 25 to pass therethrough into said boss 31. Besides the shell 25 the insert 23 carries a plurality of transverse spring loaded plungers 32 of any desired shape which are spaced apart and strategically located so that certain of the same will perform blocking and shift preventing functions within the trigger guard 16 and regardless of the shape of the latter and location of the trigger 17 therewithin. Any of said plungers 32 may axially recede to non-interfering positions should pressure be exerted against the ends thereof in an axial direction if a particular plunger underlies a portion of the trigger or trigger guard, as shown in FIGS. 1, 2, 4 and 5. Also, the face of the insert 23 is formed with a raised portion 33 to underlie and give support for an eccentrically shaped wedge 34 on the exposed face of the pad 21, said wedge being inclined and performing wedging and blocking actions when the lock is in use, as in FIG. 2 and it cooperates with a raised rib 35 on said face of said pad 21. The latter normally locates exteriorally of a marginal portion of the trigger guard, as shown in FIGS. 4, 5, and 10. Said wedge 34 and rib 35 complement a similar wedge 36 and rib 37 on the exposed face of the pad 22 carried by the complementary cover 20. The pad 22 also carries a plurality of tapered protuberances 38 which may engage portions of the trigger guard and prevent slippage and marring. Additionally, the pad 21 is apertured to accommodate the projecting cylinder shell 25. Because firearm trigger guards are normally tapered and increase in breadth from top to bottom the pad 22 is conversely tapered, as shown in FIG. 3, so that the mounted trigger lock 15 will firmly and evenly engage the trigger guard.

As disclosed in the prior Foote Pat. No. 3,392,471 the inner extended end portion of the cylinder shell 25 has an elongated opening 39 therein to expose a side wall portion of the plug 27. A side wall portion of the key plug is formed with an extent of ratchet teeth 40. When the plug 27 is turned through a certain are through an applied key 28 the ratchet teeth 40 will be presented to and exposed through the opening 39 for engagement with the teeth on a spring loaded ratchet dog 41 to thereby hold the covers 19 and 20 in adjusted clamping position relative to the opposite sides of the trigger guard. A turning movement of the plug in the opposite direction through the applied key wil cause the teeth 40 to move away from their ex posed position and out of engagement with the dog 41 whereby the cylinder-plug unit 25-27 may be moved axially to separate the carrier cover 19 from the complementary cover 20, whereby complete removal of the lock assemblage from the trigger guard is possible.

One manner in which the improved trigger lock may be mounted on the trigger guard of a firearm is shown in FIGS. 1, 2, 3, and 4. The carrier cover 19 is manually positioned against the remote face of the trigger guard with its resilient pad or cushion 34 in contact with the latter. The complementary cover 20 is then positioned against the other side (the front in the drawings) of the trigger guard so as to cover the same with its pad 22 in contact with the guard surface. The cylinder shell 25 carried by the cover 19 is passed transversely through the opening in the trigger guard. In this particular disposition of the lock covers, the cylinder shell 25 will locate forwardly of the trigger 17 with the extended end of the shell being inserted into the hollow boss 31 in the complementary cover 20. The two covers may be brought together as firmly as desired with the pads 21 and 22 impinging against the opposite outer surface portions of the trigger guard 16. During this mounting operation the plug 27 is in a position so that the ratchet dog 41 and inward adjustments are possible, but the ratchet dog will prevent outward separation of the covers. When the two covers are thus clamped onto the firearm trigger guard the axially yieldable plungers 32, wedges 34 and 36 and ribs 35 and 37 come into play. The plungers 32 are of a sufficient number and are so strategically, non-uniformly located that most of the same (not necessarily all) will locate in functioning juxtaposition to portions of the trigger guard 16 and trigger 17, as shown in FIGS. 1 and 4, and this will be the case irrespective of the size or design of the trigger guard and the location of the trigger therein, thereby rendering the trigger lock self-conforming relative to practically any firearm trigger guard and trigger. From FIGS. 1 and 4 it will be observed that in the illustrated mounting of the trigger lock certain of the plungers 32 as well as the cylinder shell 25, will block unauthorized movement of the trigger 17, while others recede inwardly to noninterfering positions because they happen to underlie portions of the trigger guard and trigger. A trigger lock, to be effective when mounted, must be prevented from any shifting thereof on the guard to an extent which might cause any of the transverse guarding elements to undesirably engage and actuate the trigger 17, or which might allow trigger movement known as fanning in a single action firearm wherein the barrel might be rotated through cocking. Contributing to the elimination of such problems are the wedges 34 and 36 and the peripheral ribs 35 and 37. The latter, as shown in FIG. 4, locate exteriorally of one end of the trigger guard while one or more of the plungers 32 may locate exteriorally of a remote portion of the trigger guard. The improved lock assemblage not only conforms to the trigger guard to which it is applied and prevents movement of the trigger, but it also is non-shiftable.

It is not essential that the covers of the trigger lock be applied to the trigger guard in a single prescribed position. Depending on the type and size of trigger guard and the convenience of the user, the lock may be applied to a trigger guard in dispositions other than that of FIGS. 1 and 4, FIG. 5 illustrating one of many other modes of application. In FIG. 5 the lock assemblage covers 19 and 20 are positioned somewhat more rearwardly on the trigger guard with the cylinder shell 25 locating against the rear of the trigger 17. One plunger 32 locates against a forward edge of the trigger and another plunger engages the rear of the trigger so that unauthorized movement of the latter is prevented. Ribs 35 and 37 engages the front end of the trigger guard and still another plunger 32 locates near the rear end of the trigger guard. Thus the trigger is efiectively blocked against movement and the lock cannot shift on the trigger guard. The wedges 34 and 36 contribute toward insuring the retention of the lock assemblage on the trigger guard in its mounted, protective, self-conforming position.

The present trigger lock may be mounted on any trigger guard regardless of the breadth or shape of the latter. As mounted and with the pads firmly compressed against the firearm trigger guard, and with the plungers 32, wedges 34 and 36, and ribs 35 and 37 performing their functions, the trigger lock is securely, self-conformingly attached to the trigger guard and prevents access to the covered trigger 17. The lock cannot be removed without unlocking the unit through the manipulation of the applied key 28.

By providing a gun trigger lock having a key-controlled pin tumbler cylinder mechanism it is impossible for an unauthorized person to actuate and remove the lock. The trigger lock conformingly covers the trigger guard and it mounts so compactly and snugly that it in no manner interferes with storage, handling or carrying of the tirearm, but fully protects the latter.

From the foregoing description it will be evident that the improved trigger lock is readily applicable to the trigger guards of various types of firearms, is easy to apply and remove, is adjustable and conforms to the trigger guard to which it is applied, and is otherwise well adapted for the purposes described.

What I claim is:

l. The combination with a firearm trigger enclosing guard, of a trigger lock, comprising: a pair of cover members applied to opposite sides of said trigger guard; lockable means connecting said cover members and extending transversely into said guard in proximity to the trigger; and other means carried by a cover member and extending into adjacency to portions of the guard and the enclosed trigger including spaced-apart yieldable plungers.

2. The combination of claim 1 wherein said yieldable plungers are plural in number and are strategically spacedapart in a non-uniform manner.

3. The combination of claim 1 wherein said plungers are axially yieldable and automatically retract to non-interfering positions when contacted endwise by obstructions.

4. The combination of claim 1 wherein an element of the lockable means which extends transversely into said guard is a shell enclosing a key actuated cylinder plug.

5. The combination of claim 1 wherein the inner face of each cover member carries a resilient pad and the exposed face of a pad is formed with protuberances.

6. In a trigger lock having a pair of opposed cover members shaped to engage and substantially cover opposite faces of a firearm trigger guard with a turntable plug connected to and extending transversely of the plane of one of the cover members through the firearm trigger guard and housed within a cylinder shell with the other cover member being formed with means for adjustably receiving an extended portion of said turntable plug and shell, there also being means which permit the cover members to be adjustably clamped against opposite sides of the trigger guard in connected, spaced relation, the improvements which comprise; axially yieldable, spaced apart plungers projecting transversely inwardly from one of the cover members for entry into a trigger guard in proximity to portions of the latter and the enclosed trigger.

References Cited UNITED STATES PATENTS 3,392,471 7/1968 Foote 42] Y 3,422,560 1/1969 Foote eta] 421 Y 3,022,596 2/ 1962 Cannon 42-1 Y 2,664,658 1/1954 Bjorklund 42-l Y BENJAMIN A. BORCHELT, Primary Examiner C. T. JORDAN, Assistant Examiner

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4050662 *Mar 4, 1976Sep 27, 1977David Harrison PickeringBracket
US4499681 *Mar 7, 1983Feb 19, 1985Presto Lock, Inc.Security device for firearms
US4763431 *Sep 25, 1986Aug 16, 1988Allan Robert EHandgun locking and unlocking apparatus
US4864760 *Oct 21, 1988Sep 12, 1989Shivers Horace LHammer locking device for handgun
US4914846 *Jul 24, 1989Apr 10, 1990Shivers Horace LGun hammer cocking apparatus usable with a hammer locking device extending about the hammer
US5050328 *Mar 8, 1991Sep 24, 1991Harry A. InskoTrigger lock
US5153360 *Oct 11, 1991Oct 6, 1992Upton Industries Pty. Ltd.Gun lock
US5231236 *Jan 7, 1992Jul 27, 1993Carlos Del RealSafety lock for firearms
US5347835 *Feb 3, 1992Sep 20, 1994Dewey David LControl lever lock
US5375440 *Aug 19, 1993Dec 27, 1994Patterson; Scott D.Lockable storage case for a handgun
US5437119 *Aug 16, 1994Aug 1, 1995Weinraub Enterprises, Inc.Gun trigger blocking structure
US5487234 *Nov 29, 1993Jan 30, 1996Dragon; Paul K.Firearm locking device with motion sensor and alarm
US5515633 *May 1, 1995May 14, 1996Harris; Jon H.Trigger shield
US5535605 *Aug 23, 1995Jul 16, 1996United States Marketing CorporationGun lock
US5551181 *Apr 13, 1993Sep 3, 1996Mcdonald Upton LimitedGun lock
US5561935 *Jan 16, 1996Oct 8, 1996Coastal Trading CompanyTrigger lock for firearms
US5638627 *Mar 1, 1996Jun 17, 1997Franzen International, Inc.Lock for firearms with trigger blocking function
US5647158 *Sep 11, 1995Jul 15, 1997Eskelinen; Conrad W.Gun trigger lock
US5704152 *Oct 22, 1996Jan 6, 1998Martin HarrisonSecure, quick release safety gun lock
US5713149 *Jan 11, 1996Feb 3, 1998Trigger Block, Inc.Electronic trigger lock
US5720193 *Apr 11, 1995Feb 24, 1998Dick; Daniel J.Push button firearm lock
US5755054 *Mar 26, 1997May 26, 1998Crosman CorporationTrigger blocking device
US5899102 *Jul 5, 1998May 4, 1999Ling; Chong-KuanSimplified firearm lock
US5918492 *Jan 29, 1997Jul 6, 1999Smith & WessonTrigger guard-engaging gun lock
US6240670Sep 3, 1999Jun 5, 2001Ra Brands, L.L.C.Locking mechanism for firearms
US6269575 *Aug 17, 1999Aug 7, 2001Wen-Kwei ChangLocking device for the trigger of a pistol
US6308540 *Oct 22, 1999Oct 30, 2001Li-Chiue LeeCable-type fastening device for pistol trigger lock
US6349496 *Aug 31, 1999Feb 26, 2002George Joseph NeelySafety locking device for a firearm
US6405469 *Apr 25, 2000Jun 18, 2002Michael J. WalshTrigger lock
US6415540 *Apr 26, 2000Jul 9, 2002Derek RingersFirearm trigger lock
US6457272Jun 1, 2001Oct 1, 2002Weinraub Enterprises, Inc.Firearm security arrangement
US6474238Jun 14, 2000Nov 5, 2002Weinraub Enterprises, Inc.Gun trigger lock
US6487803Jan 14, 2000Dec 3, 2002Sandy Tai Sheung YuPush button firearm lock
US6568117Dec 20, 2001May 27, 2003Weinraub Enterprises, Inc.Gun hammer and lever lock
US7281397 *Dec 14, 2004Oct 16, 2007Hugh VictorSecuring system and method
US7367150Dec 9, 2005May 6, 2008Regal Industrial Sales, Inc.Universal fixed pin trigger block
US7584566Aug 9, 2007Sep 8, 2009Hugh VictorSecuring system with housing for hardware
US7730750Sep 25, 2007Jun 8, 2010Hugh VictorSecuring system and method
US8186088Aug 7, 2009May 29, 2012Hugh VictorSecuring system with housing for hardware
US8402799May 10, 2010Mar 26, 2013Hugh VictorSecuring system and method
US20050229654 *Dec 14, 2004Oct 20, 2005Hugh VictorSecuring system and method
US20060117633 *Dec 3, 2004Jun 8, 2006Wen-Kwei ChangCore structure of a gun trigger lock
US20080034635 *Aug 9, 2007Feb 14, 2008Hugh VictorSecuring system with housing for hardware
US20080245117 *Sep 25, 2007Oct 9, 2008Hugh VictorSecuring system and method
US20090266963 *Apr 23, 2008Oct 29, 2009Christopher MarszalekClamp, system and/or method for securing an article to a fixture
US20100218567 *May 10, 2010Sep 2, 2010Hugh VictorSecuring system and method
US20110016932 *Feb 13, 2009Jan 27, 2011Sinox Co., LtdBurgarproof lock and burgarproof system using the same
US20150033609 *Aug 1, 2014Feb 5, 2015Rodrick A. HerdmanDevice for mounting and securing a handgun
EP0740122A2 *Mar 22, 1996Oct 30, 1996S. Franzen Söhne (GmbH & Co)Safety lock for gun trigger
EP0740122A3 *Mar 22, 1996Mar 5, 1997Franzen Soehne SSafety lock for gun trigger
WO1993014956A1 *Feb 2, 1993Aug 5, 1993Dewey David LControl lever lock
WO1993021491A1 *Apr 13, 1993Oct 28, 1993Upton Industries, Pty., Ltd.A gun lock
WO1995014901A1 *Nov 29, 1994Jun 1, 1995Dragon Paul KFirearm locking device with motion sensor and alarm
U.S. Classification42/70.11, 70/14, 42/70.7, 70/34, 70/202, 70/461, 70/DIG.580
International ClassificationF41A17/02, F41A17/54
Cooperative ClassificationF41A17/54, Y10S70/58, F41A17/02
European ClassificationF41A17/02, F41A17/54