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Publication numberUS3834198 A
Publication typeGrant
Publication dateSep 10, 1974
Filing dateFeb 21, 1973
Priority dateOct 2, 1972
Publication numberUS 3834198 A, US 3834198A, US-A-3834198, US3834198 A, US3834198A
InventorsWiczer M
Original AssigneeWiczer M
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Lock anti-pick device
US 3834198 A
Abstract
An anti-pick device for a lock is described which includes means for disabling the lock, and means including a key slot for operating the disabling means. A housing is mounted over the key slot entrance and a key holder is mounted slidably in the housing for movement along the path aligned with the key slot. A recess is provided in the key holder extending transversely of the path of movement of the key holder for receiving the key and supporting the key in alignment with the key slot.
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Description  (OCR text may contain errors)

[111 3,834,198 ]*Sept. 10,1974

LOCK ANTI-PICK DEVICE 2,189,227 2/1940 Schoch 292/1 Max Wiczer 9122 Kedvale skokie 3,630,053 12/1971 Krakauer.................... 70/421 9 a 1 111. 60076 Th f th t f Primary Examiner-Albert G. Craig, Jr. igfz gg g f 990 Attorney, Agent, or Firm-Fitch, Even, Tabin & has been disclaimed. Luedeka Feb. 21, 1973 [21] Appl. No.: 334,394 [57 ABSTRACT 63 f l Appmm Data An anti-pick device for a lock is described which infgg g fi g gg 33 cludes means for disabling the lock, and means including a key slot for operating the disabling means. A housing is mounted over the key slot entrance and a Z2Z @Q key holder is mounted slidably in the housing for Int Cl Eosb 13/08 5/04 movement along the path aligned with the key slot. A [58] Fieid 70/156 273 406 recess is provided in the key holder extending trans- 70/ versely of the path of movement of the key holder for receiving the key and supporting the key in alignment References Cited wlth the key slot UNITED STATES PATENTS 8 Claims, 3 Drawing Figures 483,298 9/1892 70/107 ilnite States Patent [1 1 Wiczer [76] Inventor:

[*1 Notice:

[22] Filed:

77 I rnnnaflnhrddwnufi J M ./.|||,u1|/\. 9 9 t 1111 Me. un 4 9 .lllln l l l i 3 /J: m/ 5H9 7w 7/ e 2 6 e7 .9 3i a0 5 5 A 4 .1. 5 9]. n 4 M i LOCK ANTI-PICK DEVICE This application is a continuation-in-part application of copending application Ser. No. 294,385 filed Oct. 2, 1972, now US. Pat. No. 3,765,199 dated Oct. 16, 1973.

This invention relates generally to locking devices and, more particularly, to an anti-pick device for a lock having a movable element.

Various techniques have been devised by nefarious individuals within society for opening locking devices without the necessity of employing a key. Such techniques include picking, drilling, punching, and pulling the cylinder out of the lock.

In order to frustrate the activities of such persons employing the aforementioned techniques, a number of prior art devices'have been devised. Typically, these devices have not afforded as thorough protection against illegal tampering as might be desired. Moreover, such prior art devices have often been'difficult to install, expensive to construct, and have some times required extensive modification of the lock itself.

In the aforementioned copending patent application, an anti-pick device for a lock is described-which prevents a direct line of sight'access to the key slot and therefore provides a means for protection for the lock against picking, drilling, punching, and cylinder pulling. The device described in the aforementioned patent application is adapted for installation over the key slot entrance to an existing lock.

For certain types of locks, the device described in the aforementioned patent application may not be suitable. For example, in locks of the so called T-Handle type in which, upon opening of the lock, a handle springs outwardly from a recess to enable turning and opening of a latch, the locking device as described in the aforementioned patent application may interfere with the operation of the handle.

It is an object of the present invention to provide an improved anti-pick device for a lock.

Another object of the invention is to provide an antipick device for a lock which is readily installed, inexpensive to construct, and does not require major modification of. the lock itself.

It is another object of the invention to adapt the antipick device of the previously set forth patent applica I Various other objects of the invention in addition to those set forth above will become apparent to those skilled in the art from the following description, taken in connection with the accompanying drawings, wherein:

FIG. 1 is a full cross sectional view of the device of the invention, shown installed-with a lock in a panel;

FIG. 2 is a front elevational view of the apparatus shown in FIG. 1; and

FIG. 3 is a rear elevational view of a portion of th apparatus of FIG. 1.

Very generally, the anti-pick device of the invention comprises disabling means 11 for engaging and disengaging a movable element 12 of a lock 13 for preventing and enabling movement-of the movable element. A rotary memberl4 is provided, and means 15 are provided for operating the disabling means in response to rotation of the rotary member. A key slot 16 in the rotary member is adapted for receiving a key 17 for rotating the rotarymember. A housing 18 is mounted about the entrance to the key slot, and a key holder 19 is mounted slidably in relation to the housing for linear movement along a path aligned with the key slot. The key holder has a recess 21 therein for receiving the key and supporting the key in alignment with the key slot. The recess extends transversely of the path of move- .ment of the key holder.

Referring now more particularly to the drawings, the invention is shown employed in connection with a T- Handle lock assembly with an Ace lock of the type manufactured by the Chicago Lock Company, Chicago, Ill. The anti-pick device of the invention is adapted for mounting to a panel 23 in which the lock is already mounted in order to provide protection for the existing lock against tampering. The device of the invention may be so mounted without substantial modification of the lock or the panel, as will be described. The panel 23 may be, for example, the door to a vending machine cabinet 24.

The lock illustrated in the drawings includes a movable element or body 12 which projects through an opening 25 in the panel 23 and which has a handle 27 mounted thereon. The body 12 contains the lock mechanism internally thereof, and the lock mechanism,

which is not illustrated, is operated by the insertion of a key, not shown, in an annular slot 29. The body is supported in a bracket 31 which is mounted by means of a flange 33 to the panel 23 by bolts 35 and nuts 37. A shim plate 39 is placed behind the panel for additional rigidity. The flange 33 is provided with a recess 41 and the body 12 is movable axially within the bracket 31 so as to enable the handle 27 to be recessed within the recess 41 when the lock is in a locked condition. To hold the body with the handle in the recessed condition, a pin, not shown, mounted internally of the lock body, enters a hole 42 in the bracket 31. Operation of the lock mechanism by the key withdraws the pin from the hole.

A spring 43 is mounted between the inner end of the body 12 and an inwardly projecting annular wall 45 on the inner end of the bracket 31. The spring 43 biases the body 12 axially outward and therefore biases the handle 27 into the position illustrated. In this position, an internal keyway not shown couples the handle 27 to a lock shaft 47 in order to enable the shaft 47 to be rotated when the handle 27 is turned. The shaft 47 is connected to drive a threaded shaft 49, the latter being mounted for rotation within the annular flange 45 of the bracket 31 by means of washers 51, 53, and 55. Suitable mechanisms, such as a latch, not illustrated, are mounted on the threaded shaft 49 for operation by the handle 27.

When the lock 13 is in the locked condition, the han- I cessible when the lock 13 is in the locked condition.

Accordingly, tampering with the lock could cause release of the internal latching mechanisms within the lock body 12 and enable the lock to be placed in the illustrated condition andthe latch mechanism to be operated. In order to prevent this, the device of the invention is employed.

In accordance with the invention, a U-shaped bracket 57 is mounted to the inside of the panel adjacent the lock bracket 31. The bottom of the U-shaped bracket 57 is provided with an opening 59 through which the lower one of the screws 35 passes. The sides of the U-shaped bracket 57 are provided with a pair of aligned openings 61 and 63 through which a pin 65 is adapted to slidably pass. The lock 13 is altered by means of providing a simple hole, recess, or other detent 67 in the lock body 12 such that the recess 67 is in alignment with the holes 63 and 61 when the lock 13 is in the locked condition. This enables the pin 65 to be passed into the recess. With the pin 65 in the recess, the

lock 13 is disabled in that the handle 27 may neither'be withdrawn nor rotated to operate the latch.

The pin 65, which forms part of the disabling means 11, is biased toward the movable element or body 12 of the lock 13 by means of a suitable spring 69. The spring 69 is contained between one side of the U- shaped bracket 57 and a washer 71. The washer is held in place by a suitable spring clip 73 secured in an annular groove in the pin 65. The washer 71 provides a stop for the axial movement of the pin 65 by engaging the inner side of the U-shaped bracket 57 when the pin aligns with the recess 67 in the body 12 of the lock 13.

In order to retract the disabling pin 65 from the recess 67 and enable the lock 13 to beoperated, the pin 65 is provided with a washer 75 on the end thereof away from the lock body 12. A shoulder 77 on the pin 65 retains the washer 75 on the pin. A pair of curved prongs 15 are provided for operating the disabling pin 65. As may be seen in FIG. 3, the prongs are mounted on the end of a bracket 81. The bracket 81 is provided with a square hole 83 therein which is slipped over a nut 85 screwed onto the threaded portion of a rotary member 14. The bracket is retained on the nut 85 by a washer 89 and bolt 91. The axis of rotation of the prongs is about the axis 92 of the rotary member 14, but the axis of curvature 79 of the prongs is offset to provide eccentric action.

The rotary member 14 is contained within the body 93 of a second lock 95. The second lock 95 is provided with an anti-pick device in accordance with that shown, described, and claimed in the aforementioned copending application, and the aforementioned copending application is incorporated herein by reference.

The body 93 of the lock 95 is secured to an annular disc 97 by means of a flange 99 and a nut 101. A key slot 16 is provided in the rotary member 14 in which a key 17 may be inserted for rotating the rotary member 14 in the lock body 93. The disc 97 is secured to a housing 103 by means of screws 105.

The housing 103 is supported in an opening 105 in the front panel 23 at a flange 107. A mounting collar 109 surrounds the housing 103 on the inner side of the panel 23 and is secured to the housing by set screws 111 which enter an annular recess 113 in the housing. Thus, the panel 23 is clamped-between the flange 107 and the collar 109 to support the housing 103 in the opening 105.

The housing 103 contains an internally projecting flange 113 in which or through which a key holder 19 is slidably supported. The key holder 19 is provided with an internal enlarged portion 115 which is contained within the housing 103 behind the flange 113, thus preventing removal of the key holder 19 from the flange. The key holder 19 is provided with a key slot 21 therein which is narrow and which has an opening extending transversely of the direction of movement of the key holder 19. A key 17 fits within the key slot 21 and the key holder 19 is then pushed inwardly to cause the key 17 to enter the key slot 16 for operating the lock 95.

Because the lock 13 is disabled by means located solely behind the panel 23, and because access to the lock95 is obtained only through the narrow key slot 21,'preventing direct line of access to the key slot 16, the invention provides a high degree of protection against tampering. Protection is provided against picking, drilling, punching, cylinder pulling, and many other types of nefarious activities. The device of the invention is-relatively simple of construction, is easily installed, and represents a significant improvement over the known prior art. The device of the invention is readily installed in an existing panel having a lock already mounted therein to provide protection without substantial modification of the existing lock.

Various modifications of the invention in addition to those shown and described herein will become apparent to those skilled in the art from the foregoing description and accompanying drawings. Such modifications are intended to fall within the scope of the appended claims.

What is claimed is:

I. An anti-pick device for a lock having a movable element, comprising, disabling means for engaging and disengaging the movable element of the lock for preventing and enabling movement of the movable element, a rotary member, means for operating said disabling means in response to rotation of said rotary member, a key slot in said rotary member for receiving a key for rotating said rotary member, a housing for mounting about the entrance to said key slot, said housing having an opening therein aligned with the key slot, and a key holder mounted slidably in relation to said housing for movement along a path aligned with the key slot, said key holder generally filling said opening in said housing, and means for preventing withdrawal of said key holder from said housing, said key holder having a recess therein for receiving a key and supporting same in alignment with the key slot, said recess extending transversely of the path of movement of said key holder and extending axially to open in alignment with the key slot only within said housing.

3. A device according to claim 2 wherein said disabling means include a spring biasing said lock pin toward the movable element.

4. A device according to claim 1 wherein said operating means comprise a cam movable in response to rotation of said rotary member.

5. A device according to claim 4 wherein said cam comprises a pair of prongs curved about an axis which is parallel with and offset from the axis of rotation of said rotary member and which are mounted for rotation about the axis of said rotary member to provide an eccentric action.

6. A device according to claim 5 wherein said disabling means comprise a lock pin movable axially into and out of a receiving opening in the movable element, and wherein said lock pin includes means thereon for engaging said prongs.

7. A device according to claim 6 including a spring biasing said lock pin toward the movable element.

8. An anti-pick device for-a lock having a movable element, comprising, a lock pin movable axially into and out of a receiving opening in the movable element, a spring biasing said lock pin toward the movable element, a cam in engagement with said lock pin, a rotary member for moving said cam to move said lock pin against the bias of said spring, a key slot in said rotary member for receiving a key for rotating said rotary with the key slot, and a key holder mounted slidably in relation to said housing for movement along a path aligned with said key slot, said key holder generally filling said opening in said housing, and means for preventing withdrawal of said key holder from said housing, said key holder having a recess therein for receiving a key and supporting same in alignment with said key slot, said recess extending transversely of the path of movement of said key holder and extending axially to open in alignment with the key slot only within said housing.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US483298 *Aug 15, 1891Sep 27, 1892 Hineich bruns
US2189227 *Feb 28, 1938Feb 6, 1940Fred C SchochDoor latch
US3630053 *Apr 1, 1970Dec 28, 1971Krakauer Edwin GSafety lock
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4132092 *Apr 18, 1978Jan 2, 1979Chicago Lock Co.Protective cover for a handle lock
US4167104 *Nov 21, 1977Sep 11, 1979Coca-Cola Bottling Works CompanySolenoid enabled lock for vending machines and the like
US4217064 *Jun 29, 1978Aug 12, 1980Spectrum X-Ray CorporationLatching mechanism
US4383451 *Apr 10, 1981May 17, 1983Chapel Nimrod TApparatus and method for removing material
US4526058 *Jun 2, 1983Jul 2, 1985Hr Textron Inc.Centering and lock mechanism for hydraulic actuator
US4966018 *Oct 25, 1989Oct 30, 1990Peter HauberLow profile, secure camper shell latch
US5212972 *Jun 15, 1992May 25, 1993The Eastern CompanyTamper resistant pop-handle lock
US5347834 *Apr 24, 1991Sep 20, 1994Dieter RamsauerPivoting lever catch securable with a cylinder lock device
US5813257 *Jun 25, 1997Sep 29, 1998Coin Acceptors, Inc.Electrically controllable locking device for vending machines and the like
US6474119 *Jan 28, 1999Nov 5, 2002Fastec Industrial Corp.Pop-up handle assembly
US6564597Aug 13, 2001May 20, 2003Star Lock Systems, Inc.Vandal resistant T-handle assembly
US6615623 *Sep 29, 1999Sep 9, 2003Vending Management Services, Ltd.Vending machine lock arrangements
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US6843084 *Jan 22, 2003Jan 18, 2005Dave PorterStorage compartment security system
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US7370503Dec 9, 2005May 13, 2008Ernest KellerSafety key and locking cylinder, and locking system with such safety keys and locking cylinders
US7757524 *Mar 6, 2006Jul 20, 2010Harrow Products LlcFastener shield device for locks
US7779659 *Aug 1, 2005Aug 24, 2010Aisin Seiki Kabushiki KaishaDoor handle device
US7866194 *Sep 24, 2009Jan 11, 2011Shih-Te LiuUnlocking device for concealing keyhole of lock
US7918117Jun 11, 2010Apr 5, 2011Harrow Products, Inc.Fastener shield device for locks
US8161782 *Apr 2, 2007Apr 24, 2012Cale Access AbLock for vending machine
US8347679 *Sep 24, 2009Jan 8, 2013Shih-Te LiuUnlocking device for concealing keyhole of lock
US8820128 *Nov 27, 2012Sep 2, 2014Shih-Te LiuAnti-picking device for lock and key thereof
US20030106356 *Jan 22, 2003Jun 12, 2003Dave PorterStorage compartment security system
US20040016273 *May 12, 2003Jan 29, 2004Ernst KellerSafety key and locking cylinder, and locking system with such safety keys and locking cylinders
US20060086164 *Dec 9, 2005Apr 27, 2006Ernest KellerSafety key and locking cylinder, and locking system with such safety keys and locking cylinders
US20060150694 *Mar 6, 2006Jul 13, 2006Harrow Products, Inc.Fastener shield device for locks
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US20080302148 *Aug 1, 2005Dec 11, 2008Aisin Seiki Kabushiki KaishaDoor Handle Device
US20100024497 *Aug 4, 2008Feb 4, 2010Kun-Yu WuLock assembly with picking resistant shield
US20100050705 *Apr 2, 2007Mar 4, 2010Carl Johan HakanssonLock for vending machine
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Classifications
U.S. Classification70/208, 70/156, 292/169, 70/408, 70/423, 70/181
International ClassificationE05B13/08, E05B13/00, E05B5/02, E05B5/00, E05B17/14, E05B17/00
Cooperative ClassificationE05B5/003, E05B17/14
European ClassificationE05B5/00B, E05B17/14
Legal Events
DateCodeEventDescription
Oct 23, 1989AS17Release by secured party
Owner name: BT COMMERCIAL CORPORATION
Effective date: 19880831
Owner name: WICO DISTRIBUTION CORP., A DE CORP.
Oct 23, 1989ASAssignment
Owner name: NATIONAL WESTMINSTER BANK USA, NEW YORK
Free format text: SECURITY INTEREST;ASSIGNOR:WICO DISTRIBUTION CORP., A CORP. OF DE;REEL/FRAME:005216/0295
Effective date: 19890614
Owner name: WICO DISTRIBUTION CORP., A DE CORP.
Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:BT COMMERCIAL CORPORATION;REEL/FRAME:005216/0312
Effective date: 19880831
Dec 30, 1988ASAssignment
Owner name: WICO DISTRIBUTION CORP., A DE CORP., ILLINOIS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WICO DISTRIBUTION COMPANY, L.P.;REEL/FRAME:005001/0133
Effective date: 19881221
Oct 24, 1986ASAssignment
Owner name: WICO DISTRIBUTION COMPANY, L.P., 6400 WEST GROSS P
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST. AS OF JULY 11, 1986;ASSIGNOR:WICZER, MAX;REEL/FRAME:004619/0240
Effective date: 19860711
Oct 24, 1986AS02Assignment of assignor's interest
Owner name: WICO DISTRIBUTION COMPANY, L.P., 6400 WEST GROSS P
Owner name: WICZER, MAX
Effective date: 19860711
Jul 14, 1986ASAssignment
Owner name: J. HENRY SCHRODER BANK & TRUST COMPANY, ONE STATE
Free format text: SECURITY INTEREST;ASSIGNOR:WICO DISTRIBUTION COMPANY, L.P., A DELAWARE LIMITED PARTNERSHIP BY WICO HOLDING CORP., GENERAL PARTNER;REEL/FRAME:004599/0762
Effective date: 19860711
Owner name: J. HENRY SCHRODER BANK & TRUST COMPANY, A NY. CORP