US2375682A - Cylinder lock - Google Patents

Cylinder lock Download PDF

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Publication number
US2375682A
US2375682A US48234643A US2375682A US 2375682 A US2375682 A US 2375682A US 48234643 A US48234643 A US 48234643A US 2375682 A US2375682 A US 2375682A
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US
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Grant
Patent type
Prior art keywords
cylinder
tumbler
fig
key
lock
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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
Inventor
Philip W Olson
Original Assignee
Philip W Olson
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.)
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Publication date
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    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B29/00Cylinder locks and other locks with plate tumblers which are set by pushing the key in
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00Locks
    • Y10T70/70Operating mechanism
    • Y10T70/7441Key
    • Y10T70/7486Single key
    • Y10T70/7508Tumbler type
    • Y10T70/7559Cylinder type
    • Y10T70/7588Rotary plug
    • Y10T70/7593Sliding tumblers
    • Y10T70/7599Transverse of plug
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00Locks
    • Y10T70/70Operating mechanism
    • Y10T70/7441Key
    • Y10T70/7915Tampering prevention or attack defeating
    • Y10T70/7932Anti-pick

Description

P. W. OLSON CYLINDER LOCK May '8, 1945.

Filed April 8, 1943 n W PW y Y. a

PW 11/. azs BY Patented May 8, 1945 UNITED STATES PATENT OFFICE, h g 2,375,682

. CYLINDER were Phillip W. Olson, Chicago, 111.. Application April s, 1943, Serial No. 482,346

2 Claims. This invention relates in general to looks and more particularly to a tumbler type cylinder lock highly resistant to .picking.

So-called pick-proof locks prior to this invention usually were dependent upon a large number of tumblers or other complicated means i for their securityiand resistance to picking, which construction is expensive, whereas the novel construction of the present invention includes simple means whereby the use of relatively few tumblers and correspondingly low manufactuing cost provide ample security and high degree ofresistance to picking.

Ihe principal object of the invention is to provide a tumbler lock including a plurality of relatively few detent-controlled tumblers.

A further object of the invention is the provision of a cylinder lock having detent-controlled.

i 9 Further object and advantages of the invention will be apparent inone embodiment hereinafter described, in which: 7

Fig. 1 is a side elevation of the lock assembly. Fig. 2 is a typical key for operating the lock shown Fig. 1. i

Fig, 3 is an enlarged cross-sectional view of the lock taken through section lines 33, Fig. 1.

Fig. 4 is. an enlarged cross-sectional View of the key takenthrough section lines 4-4, Fig. 2.

Fig. 5 is an enlarged perspective view of the tumbler elements of the lock.

Fig. 6 is an enlarged cross-sectional elevation of the lock taken through section lines 6-6, Fig. 3 and showing the key in proper relation to the For the purpose of illustration, the type lock shown anddescribed is for the use of a key having unrelated serpentine grooves in its oppo-. site sides, and although this showing is a preferred construction, it will appear from the following description that locks for other type keys are equally applicable. i

Referring to Fig. 1, the barrel or housing I serves to retain the elements of the lock. .A cap 2 closely fitted over the barrel contains the keyhole. A conventional bolt 3 is integrally secured to the rotatable cylinder 4 and is adapted to engage a strike plate, not shown.

Referring to Figs. 2 and 4, the key 5 is provided with a rectangular shank 6 having unrelated sernormally would unlock the bolt 3 from a strike pentine grooves l in each side thereof. The barrel I has in'its inside periphery, two pair of oppositely disposed grooves 8 running parallel to its axis.

A cylinder 4 is constructed of two half sections and held together by means of two snap rings 9 fitting in appropriate grooves in each end of thefcylinder, shown in Fig. 6. The cylinder is adapted to rotate freely within the barrel l. A cylindrical projection ll! of the cylinder extends through a bearing ring I l which is retained in proper position by a snap ring 12. The bolt 3 is integrally attached to the end of the projection t In for locking purposes.

Referring to Fig. 5, each tumbler I3 is provided with a detent projection l4 and a key follower 15 positioned opposite the detent. The key follower in each tumbler is positioned to correspond with a predetermined formation of the serpentine grooves I in the keypthe action of which will be hereinafter described. Each tumbler is placed in its corresponding slot IS in the cylinder 4 which extends through the cylinder at right angles to the axis of rotationof the cylinder.

A detent plunger IT having a Pointed end and a spring IB are retained in the cylinder in an appropriate hole IS. The pointed end of the plunger is adapted to slidably engage the detentv projection M of each corresponding tumbler.

It is now apparent from Fig. 3 that each tumbler is capable of reciprocable movement in its slot l6 and that the plunger I! will urge the tumblerv in either direction depending upon its initial movement over the central point of the projection.

In operation and assuming that the key followers l5 have been positioned to suit a corresponding key, it will be seen from Fig. 6 that one end of each tumbler will engage a groove 8 and thus prevent the cylinder 4 from turning in the barrel 1. When the key shown in Fig. 6 is inserted, the lateral surfaces of the serpentine groove 1 will engage the key followers l5 and Withdraw each tumbler a predetermined distance to free its end from the grooves 8 and thus enable the key to turn the cylinder 4 within the barrel I, which plate.

The usual practice of picking locks i dependent upon either vibrating or moving the tumblers and disengaging their ends from locking grooves. In the present invention any attempt at moving the tumblers to predetermined positions would be defeated by virtue of the detent action previously described, as it can easily be i seen if a particular tumbler is withdrawn sufficiently far to disengage one of its ends from the cylinder groove and the plunger l1 reaches the peak of the projection M of the tumbler, the plunger, urged by spring l8, will throw the tumbler in the opposite direction and thus engage the opposite end of the tumbler in the groove of the cylinder. Therefore, any attempt to operate or pick even a small plurality of tumblers without a key is impractical if not impossible.

Although the lock described herein shows three tumblers, it is to be understood that a smaller or larger number of tumbler may be used without departing from the scope of the invention.

Having described my invention, I claim: 1. A cylinder lock comprising a casing having a'key-operable rotatable cylinder afiixed therein, said casing having a plurality of tumbler slots therein, a plurality of key-operable tumblers slidslots, each'said tumbler provided with an integral detent projection, spring-actuated detent means for normally and independently engaging said therein, a plurality of key-operable tumblers slidably retained in saidcylinder, each end of said tumblers adapted to engage corresponding said bler in a corresponding said slot to lock said cyl-- inder to said casing.

- PHILLIP W. OLSON.

US2375682A 1943-04-08 1943-04-08 Cylinder lock Expired - Lifetime US2375682A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US2375682A US2375682A (en) 1943-04-08 1943-04-08 Cylinder lock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US2375682A US2375682A (en) 1943-04-08 1943-04-08 Cylinder lock

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US2375682A true US2375682A (en) 1945-05-08

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US2375682A Expired - Lifetime US2375682A (en) 1943-04-08 1943-04-08 Cylinder lock

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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2687639A (en) * 1948-06-03 1954-08-31 Gunnar E Swanson Cylinder lock and key
DE1049269B (en) * 1952-05-20 1959-01-22 Mefina Sa cylinder lock
US2890582A (en) * 1954-10-28 1959-06-16 Eugene M Navarro Lock mechanism
US3035433A (en) * 1959-10-30 1962-05-22 Eagle Lock Corp Lock mechanism
US3058336A (en) * 1960-04-12 1962-10-16 Tocchetto Virgilio Dante Locks
US3509749A (en) * 1964-04-13 1970-05-05 Duncan Ind Inc Lock
WO1996001354A1 (en) * 1994-07-01 1996-01-18 Brian Arthur Cook A key operable locking mechanism
EP0879927A1 (en) * 1997-05-22 1998-11-25 Valeo Securite Habitacle Car mounted plate tumbler cylinder lock comprising an improved sidebar
US5956986A (en) * 1995-12-11 1999-09-28 R. Berchtold A.G. Locking device with a cylinder lock and a flat key
US6105404A (en) * 1998-06-30 2000-08-22 Medeco Security Locks, Inc. Squiggle keys and cylinder locks for squiggle keys
US20050172688A1 (en) * 2002-01-23 2005-08-11 Bo Widen High security lock and key blade combination
US7392677B1 (en) * 2007-01-23 2008-07-01 Porter Lock Co., Ltd. Lock core structure
US20090019904A1 (en) * 2004-09-21 2009-01-22 Kabushiki Kaisha Tokai Rika Denki Seisakusho Key and lock
US20090293564A1 (en) * 2006-06-14 2009-12-03 Cisa S.P.A. Lock and Associated Key
FR2956690A1 (en) * 2010-02-23 2011-08-26 Valeo Securite Habitacle Device for opening a vehicle half glitters
US20120240645A1 (en) * 2009-10-30 2012-09-27 Schlage Lock Company Llc Lock cylinder and key combination
US20150184422A1 (en) * 2013-12-26 2015-07-02 Yun-Hsiang Chang Lock core structure
US9447605B1 (en) * 2015-03-11 2016-09-20 Schlage Lock Company Llc Key and lock cylinder

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2687639A (en) * 1948-06-03 1954-08-31 Gunnar E Swanson Cylinder lock and key
DE1049269B (en) * 1952-05-20 1959-01-22 Mefina Sa cylinder lock
US2890582A (en) * 1954-10-28 1959-06-16 Eugene M Navarro Lock mechanism
US3035433A (en) * 1959-10-30 1962-05-22 Eagle Lock Corp Lock mechanism
US3058336A (en) * 1960-04-12 1962-10-16 Tocchetto Virgilio Dante Locks
US3509749A (en) * 1964-04-13 1970-05-05 Duncan Ind Inc Lock
GB2305213A (en) * 1994-07-01 1997-04-02 Brian Arthur Cook A key operable locking mechaniism
WO1996001354A1 (en) * 1994-07-01 1996-01-18 Brian Arthur Cook A key operable locking mechanism
GB2305213B (en) * 1994-07-01 1998-09-23 Brian Arthur Cook A key operable locking mechaniism
US5826451A (en) * 1994-07-01 1998-10-27 Bacoz Developments Pty Ltd. Key operable locking mechanism
US5956986A (en) * 1995-12-11 1999-09-28 R. Berchtold A.G. Locking device with a cylinder lock and a flat key
EP0879927A1 (en) * 1997-05-22 1998-11-25 Valeo Securite Habitacle Car mounted plate tumbler cylinder lock comprising an improved sidebar
FR2763624A1 (en) * 1997-05-22 1998-11-27 Valeo Securite Habitacle Latch motor vehicle having an improved bar retaining glitter
US6105404A (en) * 1998-06-30 2000-08-22 Medeco Security Locks, Inc. Squiggle keys and cylinder locks for squiggle keys
US7621163B2 (en) 2002-01-23 2009-11-24 Winloc Ag High security key blade and key
US7370502B2 (en) * 2002-01-23 2008-05-13 Winloc Ag High security lock and key blade combination
US20050172688A1 (en) * 2002-01-23 2005-08-11 Bo Widen High security lock and key blade combination
US20090019904A1 (en) * 2004-09-21 2009-01-22 Kabushiki Kaisha Tokai Rika Denki Seisakusho Key and lock
US8689596B2 (en) * 2004-09-21 2014-04-08 Kabushiki Kaisha Tokai Rika Denki Seisakusho Key and lock
US20090293564A1 (en) * 2006-06-14 2009-12-03 Cisa S.P.A. Lock and Associated Key
US20080173051A1 (en) * 2007-01-23 2008-07-24 Porter Lock Co., Ltd. Lock core structure
US7392677B1 (en) * 2007-01-23 2008-07-01 Porter Lock Co., Ltd. Lock core structure
US20120240645A1 (en) * 2009-10-30 2012-09-27 Schlage Lock Company Llc Lock cylinder and key combination
US9127480B2 (en) * 2009-10-30 2015-09-08 Schlage Lock Company Llc Lock cylinder and key combination
FR2956690A1 (en) * 2010-02-23 2011-08-26 Valeo Securite Habitacle Device for opening a vehicle half glitters
WO2011104004A1 (en) * 2010-02-23 2011-09-01 Valeo Securite Habitacle Device for a vehicle door having half-springs
US20150184422A1 (en) * 2013-12-26 2015-07-02 Yun-Hsiang Chang Lock core structure
US9447605B1 (en) * 2015-03-11 2016-09-20 Schlage Lock Company Llc Key and lock cylinder

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