[go: up one dir, main page]

US3724244A - Lock actuated anti-theft device mainly for automobiles - Google Patents

Lock actuated anti-theft device mainly for automobiles Download PDF

Info

Publication number
US3724244A
US3724244A US00198184A US3724244DA US3724244A US 3724244 A US3724244 A US 3724244A US 00198184 A US00198184 A US 00198184A US 3724244D A US3724244D A US 3724244DA US 3724244 A US3724244 A US 3724244A
Authority
US
United States
Prior art keywords
lock
rollers
drum
core
key
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00198184A
Other languages
English (en)
Inventor
G Schaumburg
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Valeo Neiman SA
Original Assignee
Societe dExploitation des Brevets Neiman SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Societe dExploitation des Brevets Neiman SA filed Critical Societe dExploitation des Brevets Neiman SA
Application granted granted Critical
Publication of US3724244A publication Critical patent/US3724244A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/01—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens
    • B60R25/02—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the steering mechanism
    • B60R25/021—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the steering mechanism restraining movement of the steering column or steering wheel hub, e.g. restraining means controlled by ignition switch
    • B60R25/0211—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the steering mechanism restraining movement of the steering column or steering wheel hub, e.g. restraining means controlled by ignition switch comprising a locking member radially and linearly moved towards the steering column
    • B60R25/02115—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the steering mechanism restraining movement of the steering column or steering wheel hub, e.g. restraining means controlled by ignition switch comprising a locking member radially and linearly moved towards the steering column key actuated
    • B60R25/02126—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the steering mechanism restraining movement of the steering column or steering wheel hub, e.g. restraining means controlled by ignition switch comprising a locking member radially and linearly moved towards the steering column key actuated with linear bolt motion perpendicular to the lock axis
    • B60R25/02128—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the steering mechanism restraining movement of the steering column or steering wheel hub, e.g. restraining means controlled by ignition switch comprising a locking member radially and linearly moved towards the steering column key actuated with linear bolt motion perpendicular to the lock axis comprising safety devices avoiding locking until removal of the key
    • B60R25/02131—Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens operating on the steering mechanism restraining movement of the steering column or steering wheel hub, e.g. restraining means controlled by ignition switch comprising a locking member radially and linearly moved towards the steering column key actuated with linear bolt motion perpendicular to the lock axis comprising safety devices avoiding locking until removal of the key by using an axially slidable lock cylinder
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/50—Special application
    • Y10T70/5889—For automotive vehicles
    • Y10T70/5956—Steering mechanism with switch
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/70—Operating mechanism
    • Y10T70/7441—Key
    • Y10T70/7486—Single key
    • Y10T70/7508—Tumbler type
    • Y10T70/7559—Cylinder type
    • Y10T70/7576—Sliding and rotary plug
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/80—Parts, attachments, accessories and adjuncts
    • Y10T70/8432—For key-operated mechanism
    • Y10T70/8649—Keyhole covers

Definitions

  • the first-mentioned ones require relatively long feeler levers which must be made with high precision and which may tend toward oscillations.
  • the other devices are relatively complicated, expensive to make, and not free of trouble in operation. They also require added skills of the driver which cannot always be presupposed and in the interest of security should not be presupposed.
  • the invention overcomes these drawbacks, adding to the security of operation while giving consideration to economic aspects. It does this by construction wherein axially and transversely shiftable cylinders or the like are provided in the key hole region and in contact with suitably shaped portions of this region, so that insertion of the key between the cylinders establishes a position wherein initially, turning of the key is made possible to establish the readiness for latching, which position can be terminated only when the cylinders are brought back to an earlier position, by substantially complete removal of the key. It is possible for example to use two cylinders symmetrically arranged, although this and other preferred details described hereinafter are not required in all variants of the invention.
  • FIG. 1 is a sectional view of a lock according to the invention, shown along lines 1 1 in FIG. 2 and in one of the several positions thereof (stopping position key removed for anti-theft securement);
  • FIG. 2 is a sectional plan view of the lock according to FIG. 1, the section being taken along lines 2 2 in FIG. 1;
  • FIG. 3 is a fragmentary sectional view, taken along lines 3 3 in FIG. 1;
  • FIG. 4 is a view generally similar to FIG. 1, but showing the device in a different position (key inserted to initiate unlocking of lock bolt) and wherein the section is taken along lines 4 4 in FIG. 5 which correspond to lines 1 1 in FIG. 2;
  • FIGS. 5, 6, 7 and 8 are sectional views through the lock shown in FIG. 4, the views being taken respectively along lines 5 5, 6 6, 7 7 and 8 8 in that Figure;
  • FIG. 9 is another view generally similar to FIG. 1 and showing still another position of the device (stopping positionkey still inserted);
  • FIG. 10 is a sectional plan view taken along lines 10 0 10 in FIG. 9.
  • FIG. 11 is a sectional plan view generally similar to FIG. 10 but showing the parts in a different position (driving).
  • a receptacle 1 which can be secured to the car or other structure to be controlled, by fastening means, not shown.
  • the receptacle On the side accessible to the driver or other operator, the receptacle contains lock cylinder 3, of suitable length 2, and which has anti-rotation channels 4, 5 formed therein as shown in FIG. 2, to control rotation of core sleeve 6 therein, as is known by itself.
  • the sleeve has core piece 7 axially shiftable therein, which in turn contains the well-known plunger means 8 to 14, see FIG. 4, movable in apertures 16, 17 of core sleeve 6, FIG. 2, the dimensions of these being such that the plungers can be mounted even when core piece 7 is in core sleeve 6.
  • this piece has a smaller co-axial extension 18, flattened at 19, 20 as is best shown in FIGS. 1 and 7.
  • the flattened portion of this piece extends through matching portions of a disc 22, FIG. 1, which is rigidly connected with core sleeve 6 to rotationally couple this sleeve with core 7 while allowing relative axial motion.
  • key hole 23 at the front end of sleeve 6 has a recess 24, inside this sleeve, FIG. 1.
  • the inner walls of this recess provide room and limitation for a set, particularly a pair, of lock-controlling form bodies or rollers, shown as cylinders 25, 26.
  • these bodies roll along walls 27 in recess 24 and on top surfaces 28 of core 7, compare FIGS. 1 and 4.
  • Some of the surfaces, facing one another, are inclined to enforce axial and transverse rolling of the rollers. As shown in FIG.
  • the rollers have plain rounded ends but it will be understood that they also can have spherical end enlargements; as already noted, they can be non-symmetrical particularly to the vertical center line in FIG. 6; they can also use sliding surfaces and be formed as wedges or the like. In each case, they constitute key-engaging form bodies movable relative to the key and the key-surrounding structures.
  • the shoulder 31 of core piece 7 surrounding extension 18, FIG. 1, has pressure spring 32 acting on it and reacting against disc 22 to bias core piece 7 forwardly against form bodies 25, 26.
  • drum 3 has lugs 36, 37 on its end facing the switch drum. These lugs are in positive engagement with recesses 38, 39 of switch .drum 34 when the unit, after removal of the key, is in 41 of cylinder housing 3. Drum 34 has shaft 42 extending through latch bar 33 and positively engages a rotatable part of an ignition switch, not shown, but well known by itself.
  • bar 43 has transverse extension 44 which has lateral slidable engagement with surface 45 on switch drum 34.
  • This extension contains pin 46, pressed upwardly by spring 47.
  • the locking bar with its extension is biased toward locking position by spring 48, as is known to the art.
  • spring 48 as is known to the art.
  • a variety of similar lock bar arrangements can be used. It will be understood that the upward direction mentioned and illustrated here, normally is forward" in the actual orientation of the lock device, in a car.
  • key 49 is introduced into key hole 23 of core sleeve 6. It encounters cylinders 25 and 26 which lie in recess 24 of sleeve 6 where they are laterally confined and have correspondingly limited mobility. The key shifts them into sleeve 6 where the enlargement of recess 24 at 50 and 51 (FIG. 4) together with the wedge action of the key tip allows the rollers to yield laterally corresponding with thickness of the key.
  • core 7 is axially moved against the pressure of spring 32 by the two rollers which engage its front face 28. The key slides between the rollers into key channel of core 7, up to the key stopping abutment, and, if it has the proper profile, operates plungers 8 to 14 to operate the lock.
  • Switch drum 34 rigidly connected with core 7, at its flattened part 33, is also shifted and its contact surface 45 slides along extension 44 of bar 43, FIG. 5. In this process it causes its rear surface 57 to shift pin 46, against the pressure of spring 47, into extension 44 of bar 43, FIG 4.
  • recesses 38 and 39 provided in switch drum 34 no longer surround and limit lugs 36, 37 of cylinder lock drum 3 so that switch drum 34 no longer is locked against rotation.
  • stop 40 on head surface 36 of switching drum 34 is removed from recess 41 of lock drum 3.
  • the invention improves former devices mainly in that it no longer requires that either the tip of the key or its unprofiled narrow side must establish readiness for locking, or introduce the transition from unlocked to locking position. Nor does the key require special recesses for such purposes. It is only necessary to have a key as known from simpler units. It has been made to utilize large area portions of the key for introducing readiness for locking and actual lock release, and the surface load on the key connected with these operations has been kept low. Similarly low is the load on the cylinders or other form bodies which lie against the broad sides of the key and against corresponding surfaces in the core and core sleeve.
  • a lock and anti-theft device mainly for an automobile structure such as the steering wheel, wherein a bolt can be engaged with and disengaged from said structure by different rotations of a drum, under the control of lock core means for shifting the drum into rotatable and non-rotatable positions, and the further control of lock core sleeve means for locking and unlocking the lock core means, the improvement which comprises:
  • a system of rollers disposed between said lock core and core sleeve means and capable of shifting motions both along and across the axis of said means but biased toward motions converging on said axis, while capable of motions diverging from said axis with the help of a key for the lock;
  • lock core means and core sleeve means comprise a two-part structure wherein the core is rotatable and axially shiftable in the sleeve.
  • Apparatus according to claim 1 having a lock housing which surrounds the lock core means, core sleeve means and drum, the drum and housing structures having, respectively, lock means and recess means, engageable with one another to prevent rotation of the lock core means in a predetermined position of the rollers.
  • each of said end portions is a spherical surface not wider than the cylinder but having a radius longer than the radius of the cylinder.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lock And Its Accessories (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
US00198184A 1970-11-30 1971-11-12 Lock actuated anti-theft device mainly for automobiles Expired - Lifetime US3724244A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2058802A DE2058802C3 (de) 1970-11-30 1970-11-30 Lenkschloß für Kraftfahrzeuge

Publications (1)

Publication Number Publication Date
US3724244A true US3724244A (en) 1973-04-03

Family

ID=5789483

Family Applications (1)

Application Number Title Priority Date Filing Date
US00198184A Expired - Lifetime US3724244A (en) 1970-11-30 1971-11-12 Lock actuated anti-theft device mainly for automobiles

Country Status (7)

Country Link
US (1) US3724244A (it)
BR (1) BR7107911D0 (it)
DE (1) DE2058802C3 (it)
ES (1) ES396979A1 (it)
FR (1) FR2115804A5 (it)
GB (1) GB1323250A (it)
IT (1) IT942992B (it)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3877265A (en) * 1973-02-28 1975-04-15 Des Brevets Neiman Soc D Expl Theft protection device with cylinder lock, particularly steering lock for motor vehicles
US4052869A (en) * 1974-08-29 1977-10-11 Neiman S. A. Anti-theft device having a cylinder lock
WO1980002857A1 (en) * 1979-06-20 1980-12-24 W Nugent Locks
US4581909A (en) * 1982-05-27 1986-04-15 Neiman S.A. Cylinder lock, particularly a steering-wheel lock for a motor vehicle
US4658610A (en) * 1984-04-14 1987-04-21 Neiman S.A. Cylinder lock
US4773241A (en) * 1986-07-03 1988-09-27 Daimler-Benz Aktiengesellschaft Unlocking prevention device for a steering wheel lock
AT394877B (de) * 1990-08-22 1992-07-10 Evva Werke Zylinderschloss mit zylindergehaeuse und einem in diesem verdrehbaren zylinderkern
US20050223764A1 (en) * 2004-04-08 2005-10-13 Detex Corporation Retaining mechanism for mortise cylinders
US20050257389A1 (en) * 2004-04-17 2005-11-24 Detex Corporation Installation template for lock and alarm assemblies
US7339472B2 (en) 2004-04-08 2008-03-04 Detex Corporation Self-adjusting cam assembly
CN103114767A (zh) * 2013-03-21 2013-05-22 徐新林 珠碰珠双轴关联和交错插入弹珠防盗锁
US20140150504A1 (en) * 2012-12-03 2014-06-05 Strattec Security Corporation Ignition lock steering column lock assembly
US20170203718A1 (en) * 2014-10-01 2017-07-20 U-Shin France Anti-theft for a steering column of a motor vehicle
RU2645667C1 (ru) * 2017-05-10 2018-02-26 Максим Николаевич Филиппов Запирающий механизм ригеля
US20180208154A1 (en) * 2015-07-21 2018-07-26 Huf Huelsbeck & Fuerst Gmbh & Co. Kg Motor vehicle steering lock

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5436424Y2 (it) * 1976-03-27 1979-11-02
DE2644312C2 (de) * 1976-10-01 1978-11-23 Neiman Gmbh + Co Kg, 5600 Wuppertal Vorrichtung zur Sperrung eines in gesperrter Lage befindlichen, zylinderschloßbetätigbaren Sperriegels
DE2935556C2 (de) * 1979-09-03 1986-07-31 Neiman Gmbh & Co Kg, 5657 Haan Lenkschloß für Kraftfahrzeuge
DE3442949A1 (de) * 1984-11-24 1986-06-05 Bayerische Motoren Werke AG, 8000 München Gepaecktraeger fuer ein kraftfahrzeug, insbesondere personenkraftwagen
DE3508160C1 (de) * 1985-03-07 1986-06-26 Tibbe KG, 8065 Erdweg Lenkschloß für Kraftfahrzeuge
DE3608304A1 (de) * 1986-03-13 1987-09-24 Neiman Gmbh Schliesszylinder mit verschluss des schluesselkanals
FR2731457B1 (fr) * 1995-03-10 1997-04-04 Valeo Securite Habitacle Antivol de direction de vehicule automobile

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2932186A (en) * 1956-11-08 1960-04-12 Yale & Towne Mfg Co Dust cover for a lock mechanism
DE1118050B (de) * 1959-12-29 1961-11-23 Heinrich Flohr Vorrichtung zum staubdichten Verschliessen der Schluessel-Einfuehrungsoeffnung an Drehzylinderschloessern
US3132503A (en) * 1960-01-23 1964-05-12 Nieman & Co Kg Anti-theft lock device
DE1913412A1 (de) * 1969-03-17 1970-10-01 Ymos Metallwerke Wolf & Becker Lenk- und Zuendschloss fuer Kraftfahrzeuge mit Schluesselabzugsicherung
DE1960634A1 (de) * 1969-12-03 1971-06-16 Rudolf Eichenauer Lenkschloss fuer Kraftfahrzeuge

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2932186A (en) * 1956-11-08 1960-04-12 Yale & Towne Mfg Co Dust cover for a lock mechanism
DE1118050B (de) * 1959-12-29 1961-11-23 Heinrich Flohr Vorrichtung zum staubdichten Verschliessen der Schluessel-Einfuehrungsoeffnung an Drehzylinderschloessern
US3132503A (en) * 1960-01-23 1964-05-12 Nieman & Co Kg Anti-theft lock device
DE1913412A1 (de) * 1969-03-17 1970-10-01 Ymos Metallwerke Wolf & Becker Lenk- und Zuendschloss fuer Kraftfahrzeuge mit Schluesselabzugsicherung
DE1960634A1 (de) * 1969-12-03 1971-06-16 Rudolf Eichenauer Lenkschloss fuer Kraftfahrzeuge

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3877265A (en) * 1973-02-28 1975-04-15 Des Brevets Neiman Soc D Expl Theft protection device with cylinder lock, particularly steering lock for motor vehicles
US4052869A (en) * 1974-08-29 1977-10-11 Neiman S. A. Anti-theft device having a cylinder lock
WO1980002857A1 (en) * 1979-06-20 1980-12-24 W Nugent Locks
US4581909A (en) * 1982-05-27 1986-04-15 Neiman S.A. Cylinder lock, particularly a steering-wheel lock for a motor vehicle
US4658610A (en) * 1984-04-14 1987-04-21 Neiman S.A. Cylinder lock
US4773241A (en) * 1986-07-03 1988-09-27 Daimler-Benz Aktiengesellschaft Unlocking prevention device for a steering wheel lock
AT394877B (de) * 1990-08-22 1992-07-10 Evva Werke Zylinderschloss mit zylindergehaeuse und einem in diesem verdrehbaren zylinderkern
US7339472B2 (en) 2004-04-08 2008-03-04 Detex Corporation Self-adjusting cam assembly
US20050223764A1 (en) * 2004-04-08 2005-10-13 Detex Corporation Retaining mechanism for mortise cylinders
US7246449B2 (en) 2004-04-17 2007-07-24 Detex Corporation Installation template for lock and alarm assemblies
US20050257389A1 (en) * 2004-04-17 2005-11-24 Detex Corporation Installation template for lock and alarm assemblies
US9108585B2 (en) * 2012-12-03 2015-08-18 Strattec Security Corporation Ignition lock steering column lock assembly
US20140150504A1 (en) * 2012-12-03 2014-06-05 Strattec Security Corporation Ignition lock steering column lock assembly
US8943863B2 (en) * 2012-12-03 2015-02-03 Strattec Security Corporation Ignition lock steering column lock assembly
US20150107315A1 (en) * 2012-12-03 2015-04-23 Strattec Security Corporation Ignition lock steering column lock assembly
CN103114767A (zh) * 2013-03-21 2013-05-22 徐新林 珠碰珠双轴关联和交错插入弹珠防盗锁
US20170203718A1 (en) * 2014-10-01 2017-07-20 U-Shin France Anti-theft for a steering column of a motor vehicle
US10434983B2 (en) * 2014-10-01 2019-10-08 U-Shin France Anti-theft for a steering column of a motor vehicle
US20180208154A1 (en) * 2015-07-21 2018-07-26 Huf Huelsbeck & Fuerst Gmbh & Co. Kg Motor vehicle steering lock
US10507791B2 (en) * 2015-07-21 2019-12-17 Huf Huelsbeck & Fuerst Gmbh & Co. Kg Motor vehicle steering lock
RU2645667C1 (ru) * 2017-05-10 2018-02-26 Максим Николаевич Филиппов Запирающий механизм ригеля

Also Published As

Publication number Publication date
ES396979A1 (es) 1975-03-01
DE2058802A1 (de) 1972-06-15
IT942992B (it) 1973-04-02
BR7107911D0 (pt) 1973-03-29
GB1323250A (en) 1973-07-11
DE2058802B2 (de) 1976-01-15
FR2115804A5 (it) 1972-07-07
DE2058802C3 (de) 1980-02-28

Similar Documents

Publication Publication Date Title
US3724244A (en) Lock actuated anti-theft device mainly for automobiles
US5295377A (en) Burglar proof lock, especially lock for cars
US6516640B2 (en) Steering column lock apparatus and method
US4418554A (en) Key operated locking mechanism
US5497640A (en) Door locking system for vehicles
US3863473A (en) Cylinder lock with key in particular for steering-wheel locks for motor vehicles
US2440744A (en) Upper fifth wheel kingpin lock
GB1335904A (en) Key operated lock
US2524339A (en) Cylinder lock
GB1340968A (en) Steering locks for vehicles
US3427413A (en) Lock mechanism and alarm
GB1333779A (en) Locking device for a steering shaft of an automobile
GB1332413A (en) Motor vehicle steering column assemblies
US3613412A (en) Steering column lock
US2578211A (en) Side bar cylinder lock
GB964358A (en) Improved lock
US3455128A (en) Tumbler construction and lock using the same
US1136067A (en) Interchangeable-key lock.
US3250101A (en) Theft prevention devices
GB2291020A (en) Steering lock
US4788839A (en) Tamper resistant lock bolt assembly
US1559189A (en) Gear-shift-lever lock
GB1355188A (en) Keys for cylinder type locks and to locks operated thereby
US4561269A (en) Key-exchangeable lock
US1705363A (en) Lock