US3748881A - Key ejector lock - Google Patents

Key ejector lock Download PDF

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Publication number
US3748881A
US3748881A US3748881DA US3748881A US 3748881 A US3748881 A US 3748881A US 3748881D A US3748881D A US 3748881DA US 3748881 A US3748881 A US 3748881A
Authority
US
United States
Prior art keywords
key
plug
chamber
slot
extending
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
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English (en)
Inventor
L Erickson
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.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc
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 Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Application granted granted Critical
Publication of US3748881A publication Critical patent/US3748881A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B63/00—Locks or fastenings with special structural characteristics
    • E05B63/003—Locks or fastenings with special structural characteristics with key ejection means
    • 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
    • Y10T70/7763—Key ejecting

Definitions

  • ABSTRACT A key ejector lock including a spring loaded coaxially disposed bar member extending into the key way of the lock so as to maintain a constant ejecting bias force on a key and all angular positions of said lock.
  • the ejector mechanism is suited for use in a non-thermal conduct- 80 7 80 8 3 1 I739 01 7 3 5 7 1 82 89 32 W; m 0 mu 7 "m WMMO ".oo Umm mmmg N n- "H.3 n I "0 uhu c .r.
  • the differential in temperature between the interior and exterior of a refrigerated device results generally in a thermal conduction through a lock mechanism is removed from the lock mechanism by the refrigerated or frozen interior thereby lowering the mechanism and forming a condensing surface on which the moisture in the surrounding air can collect and in many instances freeze, thereby rendering the locking mechanism inoperative.
  • An earlier attempt to overcome such a problem can be found in the solution offered in the patent issued to Francis E. Ryder, US. Pat. No. 3,465,557, in which he proposes theuse of a plastic body member for mounting a rotatable plastic latch, whereby the absence of thermal conductivity eliminates part of the problems of condensation and freezing of moisture on the exterior surface of a locking mechanism.
  • the present invention relates to a non-thermal conducting locking device made of substantially all plastic materials, with the exception of the wafer tumblers, springs, and actuating key member, plus the addition of a key ejecting mechanism which constantly produces an ejecting biasing force against the extremity of the key.
  • a spring loaded coaxially disposed rigid bar member extends into the key way of the lock and occupies a position which must be moved in order to permit the key to actuate the lock.
  • the mechanism is so arranged that the key will be ejected from the lock at all angular positions between and including the lock and unlocked positions.
  • the bar member is preferably a lubricious plastic material which is compatable with the latch in which it is mounted so that it will be operable at all temperatures of the environment in which it is found.
  • a further object is to provide a locking device, incorporating such an ejecting mechanism which can be readily manufactured in an economical manner from non-thennal transmitting materials and which is readily mountable in the workpiece.
  • a further object of the present invention is to provide a locking is to provide a locking mechanism which is capable of accepting a multiplicity of latch means adapted to be accepted by various structural designs in the devices where they are used.
  • FIG. 1 is a prospective view in partial section of a freezer chest showing an embodiment of the present invention, partially in phantom, in its mounted environment;
  • FIG. 2 is an exploded view in perspective of the various components making up the preferred embodiment of the invention
  • FIG. 3 is a side elevational view in partial section, taken along line 33 of FIG. 1;
  • FIG. 4 is a plan view in section showing a key member in its inserted position and operating the ejector
  • FIG. 5 is a plan view in section identical to FIG. 4 except that the key has been removed.
  • FIG. 6 is an elevational view in section of the device shown in FIG. 5 located about its axis.
  • a key ejecting lock mechanism 10 of the type contemplated by the present invention includes a body member 12, a plug means or barrel 14, a latch or bolt 16, an ejecting mechanism 18 and a suitable key operating means 20.
  • the body member 12 serves as the mounting means for the lock mechanism. It includes a tubular main portion 30 having a hollow bore 32 passing throughout the entire length of the body with a laterally extending flange or face piece 34 and at the opposite end is reduced in thickness at 36.
  • the reduced portion 36 includes one or more axially extending slots 38 to make the thin portion 36 resiliently expandable.
  • the interior of the resilient portion 36 has a radially thickened extremity forming a shoulder 40 for purposes which will be set forth hereinafter.
  • One or more of the side of the main body portion 30 may be provided with a flat 42 or other suitable non-circular means for preventing rotation within a complimentary apertured workpiece.
  • the main body portion 30, in this embodiment, has one or more engaging or slot means 44 adapted to accept a retaining spring clip 46 to capture the body portion relative to the workpiece, with the flange 34 engaging the front of the workpiece and the clip 46 engaging the reserse side.
  • a bezel 48 can be added to the outer surface of the flange 44 for decorative purposes. It will be appreciated that the number of slots 44 for acceptance of the retaining clip 46 is generally dependent upon the multiplicity of panel thicknesses within which a particular block member is expected to operate as well as accommodating normal manufacturing tolerances through the spring take up of the retaining clip 46.
  • body portion 30 and particularly bore 32 adjacent the end tearing flange 34 is provided with two or more axially extending slots or grooves 50, 52, 54 and 56 which are angularly spaced relative to one another, for purposes best set forth hereinafter.
  • the plug means or barrel 14 is a one piece elongated member having a generally cylindrical main portion 60 adapted to be accepted within the bore 32 of body 12 and in this embodiment a non-circular extension 62 projecting from one end thereof.
  • the main cylinder portion 60 is provided with an interior chamber 64 which opens laterally through one side of the cylinder 60 and extends axially throughout its length. At the free extremity thereof it is provided with a pair of upstanding walls 66 each of which have one or more chordally disposed slot means 68.
  • One or more wafer like tumblers 70 having laterally extending tangs 72 are adapted to be positioned within the chamber 64 and having their opposite free extremities extending through slots 68.
  • a cavity within the chamber 64 is provided to accommodate actuating springs 74 which maintain the wafer tumbler 70 is a predetermined position by acting against the tangs 72 and the side wall of the cavity in the chamber 64.
  • each of the wafers has a lug 76 for purposes best set forth hereinafter.
  • a central elongated aperture 78 traverses each of the wafer tumblers.
  • the cylinder 60 includes a pair of oppositely disposed slot means 80 which terminate in an axially disposed shoulder 82.
  • a cover means 84 is provided with a cover plate 86 having a centrally disposed key hole slot 88 disposed therein, a laterally positioned axially extending element 90 having an exterior radius of curvature generally complimentary to that of the cylinder 60.
  • element 90 opposite the cover plate 86, are a pair of spring retainer arms 92 adapted to be complimentarily accepted within the transverse slot 80 and provided on the interior thereof with shoulder means 94 adapted to cooperate with the shoulder means 82.
  • the opposite end of the cylinder 60 adjacent to the non-circular extension 62 is provided with a circumferential groove 100 and a tapered cam surface 102 lead ing into the groove 100, for purposes best set forth hereinafter.
  • an axially extending slot or guide way 104 which communicates with the chamber 64.
  • the key ejecting mechanism 18 includes a first rigid bar portion 110 adapted to be coaxially disposed within the chamber 64, a second offset portion 112 adapted to be complimentally accepted in sliding relationship to the slot 104 and and intermediate portion 114 which interconnects the main portion 110 with the offset portion 112.
  • a cylindrical protuberance 116 is positioned on the backside of the intermediate portion 114 and is adapted to accept and locate one end of the actuating spring 118.
  • the main portion 110 is telescoped within the aperture 78 of the wafer switches while the free end of the spring 1 18 abuts against wall 65 of the chamber 64.
  • the offset portion 1 12 sliding in the groove or slot 104 provides the basis for retention of the main portion 110 in cantilever fashion from the intermediate portion 114 into its resiliently urged position within the key way.
  • a sealing O-ring 120 encircles the main portion 110 at its juncture with the intermediate portion 114, for purposes set forth hereinafter.
  • the non-circular extension 62 may take any desired configuration, in this embodiment it is generally rectangular in shape. At the free extremity of portion 62 there are provided fastening means which in the present instance are a pair of shouldered resilient legs 130 abrupt shoulders or stop means 132 positioned in spaced relation from their canned ends which facilitate entry into an aperture.
  • the latch or bolt 16 may assume any desired configuration to cooperate with a particular strike.
  • the latch 16 includes a hub 140 having a through bore 142 which is complimentary in configuration to the non-circular portion 62 of the latch mechanism.
  • the bore also includes a pair of opposite disposed slot means 143 which assist in the feeding end of the resilient retaining legs 130.
  • the latch hub 140 can be positioned in the direction shown in FIGS.
  • a secondary rectangular slot 144 is provided in cruciform relationship to slot 142 to accommodate the offset portion 112 as it slides in the slot 104, regardless of the position of the hub 140 relative to the non-circular portion 62.
  • a lug or latch 146 Extending laterally from hub 140 is a lug or latch 146 which includes a laterally extending tang 148 for locking engagement with a suitable strike.
  • the mounting body 12, the plug mechanism or barrel 14, the latch or dot 16, the ejecting mechanism 18 and the cover means 84 are preferably fabricated of a lubricious plastic material to reduce the thermal conductivity of the lug mechanism.
  • the cover means 84 is then latched into position and the entire barrel sub-assembly is telescoped within the mounting body means 12 by the introduction of the non-circular end 62 into the bore adjacent the flange 34.
  • the device is moved until the shoulders 40 rise up over the cam surface 102 to dispose the shoulders 40 and the adjacent thickened portion of the end portion 36 within the slot 100.
  • the bezel 48 may be positioned against the flange 34 prior to the telescoping of the latch mechanism 14. As can be seen in FIGS.
  • the bezel is provided with an inwardly directed flange arrangement 49 and located in a counterbore 35 within the flange 34 so that the cover plate 86 serves as a retention means for the bezel 48 and is mounted flush with the outer surface of the flange 34.
  • the sub-assembly of the body means or housing 12 and plug means or barrel 14 are telescoped within a complimentary mating aperture in a workpiece 162 such as the lid or door of a freezer chest.
  • the retaining spring 46 is then laterally slid into engagement with one of the slots 44 to securely mount the device with the flange and key slot 88 exposed on the outer surface.
  • a suitable complimentary latch or lug 16 is axially telescoped over the complimentary circular portion 62 until the shoulders 1232 fall behind the free extremity of hub 140 as defined by the end face 141.
  • a suitable strike means is positioned on the body 172 of the workpiece and is adapted to accept the tang 148, shown in phantom, in the locked position.
  • the wafer tumblers 70 are urged by their spring means 74 to extend laterally into locking engagement with the slots 54 and 56.
  • two wafer tumblers 70 are illustrated although it has been found that one is sufficient since the major purpose of such a lock is merely to prevent youngsters from leaving a freezer unit open and thereby destroying the efficacy of the unit for its intended function. Any number of tumblers can be provided if the security level desired is elevated.
  • the introduction of the key into the key way through slot 88 will move the tumblers 70 into an aligned position with the bore 32 and permit rotation of the latch mechanism or barrel 14 within the housing 12.
  • the latch or dog 146 will be rotated to engage the tang 148 with the strike 170.
  • the main portion 110 of the ejector mechanism 18 passes through the aperture 78 in the wafer tumblers 70 and blocks the key 20 way.
  • Introduction of the key 20 as shown in FIG. 4 results in a compression of the spring 118 as the main portion 110 is moved axially by the key.
  • Axial movement of the ejector mechanism to the left, as viewed in FIG. 4 moves the offset portion 112 within the slot 104 into a position within the slots 144 of hub 140 which slidingly accommodates same therein.
  • the main portion 110 maintains a constant force against the key so that it will be ejected in any position of angular rotation assumed by the barrel 14.
  • the cross-sectional area of the main portion 110 is substantially smaller than the included area of aperture 78 in wafer 70 so that the movement of the wafer tumbler 70 by the key will not affect the ejecting action under the motive power of spring 118.
  • the cover means 84 is provided with a protuberance 95 at its free end adjacent the legs 92.
  • This protuberance 95 forms the partial blocking of the lateral opening chamber 64 and in conjunction with a counterbore shoulder 121 in chamber 64 serves as a closure against which the O-ring seal 120 can seat to prevent the ingress of cold air from the freezer compartment into that portion of chamber 64 occuppied by the wafer tumblers 70.
  • the cover means 84 also includes an internal recess 96, as seen in FIG. 5, adapted to accept the lugs 76 of the wafer tumbler to assist in their rotation and stabilized operation.
  • latch or dog 16 to be utilized in this assembly is generally a matter of design choice to fit the specific environmental configuration in which it is located. While one method of fast assembly, i.e., the snap legs 130, has been illustrated as a means for assembling the latch to the barrel, it will be recognized that other forms can be utilized such as a screw and washer axially inserted into the barrel or alternatively suitable clip means, not shown.
  • the specific configuration of the cover 162 and the box 172 are merely illustrations of an environment in which the mechanism can be utilized.
  • thermally conductive metals or other materials could be equally satisfactorily used with a key ejecting mechanism of the proposed type where the temperature differential between the interior and exterior of the block environment does not present the problems which have been contemplated by this inventor.
  • a lock adapted to be mounted in an apertured workpiece comprising first body means having a bore therethrough and plug means rotatably mounted in said bore, said plug means including an axial shank member and a latch member extending laterally of the free extremity of said shank member, said body means including a first means for engaging said workpiece, a hollow shank member extending axially from said engaging means for insertion through the workpiece aperture, second means carried by said shank for engaging the workpiece oppositely from said first means and cooperating therewith in securing said body means with respect to the workpiece, said plug means including chamber means within said axial shank member, an axially extending slot communicating with said chamber, shiftable elements positioned within portions of said chamber and shiftable in response to engagement by a key for releasably engaging said body means and locking said plug means against rotation relative thereto, said slot means being disposed axially in the outer surface and for a substantial extent of said shank portion of said plug means and rotatable therewith, ejecting means capable
  • a key ejector lock including a first body means having a bore therethrough and plug means rotatably mounted in axial fixed relation within said bore and having a key-way adapted to slidingly receive a key, bar means coaxially positioned within said plug means and extending within said key-way to oppose the introduction of said key, spring means urging said bar into its extended position within said key-way to provide a constant ejecting force on said key at all angular positions of said plug means, said plug means including a central chamber and a laterally axially extending open slot parallel but spaced from the axis of said plug and communicating with said chamber, said bar including an elongated first portion of substantial extent axially disposed in said key-way within said chamber, an offset but parallel elongated second portion having substantial extent and extending in the opposite direction from 7 said first portion and slidingly accepted within said slot and an intermediate portion interconnecting said first and second portions adjacent their respective ends,
  • each of said wafers including an elongated cen tral aperture having end bearing surfaces adapted to accept and be acted on by said key, externally chordally disposed slot means terminating in abrupt shoulders, a cover means forming a retainer for said wafer tumbler means and serving as an enclosure for said one side of said plug means adjacent said chamber, a cover plate extending substantially perpendicularly to one side from one end of said cover means and including a keyhole, shouldered leg means extending laterally in the same direction as said cover plate from adjacent the opposite end of said cover means and adapted to be accepted and retained within said chordally disposed slot means.
  • said retaining means includes integral resilient shouldered finger means extending from said non-circular portion, said finger means adapted to flex during telescopic association with said latch member and to snap outwardly when the shoulders have passed through the aperture and engage the backside of said latch means to removably nomrotatably assemble same to said shank memher.
  • said plug means further includes circumferentially disposed slot means axially spaced from said chordal slot means, said body means including a radially extending flange at one end for contacting an apertured workpiece in which it is mounted, said bore at said one end being countcrbored to form an internal stop means and adapted to accept said cover plate in flush relation with said flange, said body means being provided with shoulder means resiliently biased at the opposite end to said one end and adapted to be complimentarily accepted to said circumferentially disposed slot means whereby said plug means upon telescopic association with said body means is axially captured but rotatably mounted therein, and means for engaging the workpiece in 0pposition to said flange for securing said body means relative to said workpiece.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Lock And Its Accessories (AREA)
  • Mechanical Control Devices (AREA)
  • Scissors And Nippers (AREA)
US3748881D 1972-01-04 1972-01-04 Key ejector lock Expired - Lifetime US3748881A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US21532872A 1972-01-04 1972-01-04

Publications (1)

Publication Number Publication Date
US3748881A true US3748881A (en) 1973-07-31

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ID=22802546

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Application Number Title Priority Date Filing Date
US3748881D Expired - Lifetime US3748881A (en) 1972-01-04 1972-01-04 Key ejector lock

Country Status (9)

Country Link
US (1) US3748881A (it)
JP (1) JPS5641791B2 (it)
AU (1) AU4808272A (it)
CA (1) CA968174A (it)
DE (1) DE2251686C3 (it)
FR (1) FR2167040A5 (it)
GB (1) GB1391232A (it)
IT (1) IT973018B (it)
SE (1) SE385722B (it)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4106317A (en) * 1977-06-06 1978-08-15 Illinois Tool Works Inc. Freezer lock assembly with key ejecting mechanism
US4910982A (en) * 1988-10-14 1990-03-27 Engineered Security Products Corporation Self-assembling locking device
US6237378B1 (en) * 1999-01-15 2001-05-29 Valeo Securite Habitacle Anti-theft device including an electric switch for detection of key insertion
US6477875B2 (en) * 2001-02-06 2002-11-12 Medeco Security Locks, Inc. Rotating pin tumbler side bar lock with side bar control
US6565135B2 (en) * 2000-11-06 2003-05-20 Southco, Inc. Pivoting-handle device
US20040246695A1 (en) * 2003-06-09 2004-12-09 Schlack Richard E. Compact PCI ejector latch
US6945082B2 (en) 2001-02-06 2005-09-20 Medeco Security Locks, Inc. Key blank, key and master keying system
US6969810B1 (en) 2004-05-25 2005-11-29 Rockwell Automation Technologies, Inc. Electric key switch with key sensing and ejection
AU2002237938B2 (en) * 2001-02-06 2006-06-29 Medeco Security Locks, Inc. Rotating pin tumbler side bar lock with side bar control
US20080264123A1 (en) * 2005-12-20 2008-10-30 Huf Hulsbeck & Furst Gmbh & Co. Kg Cylinder Core
US20100000275A1 (en) * 2006-10-30 2010-01-07 Valeo Securite Habitacle Locking cylinder for a motor vehicle
CN101135214B (zh) * 2006-08-30 2012-01-25 海尔集团公司 一种冷藏装置的门锁结构
US9644397B2 (en) 2014-05-16 2017-05-09 The Eastern Company Food freezer locks and keys having safety features for preventing child entrapment
US20170254118A1 (en) * 2012-06-06 2017-09-07 Novomatic Ag Locking device

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2261695A (en) * 1991-11-15 1993-05-26 Peter King Key ejecting lock security device
US6041628A (en) * 1999-08-13 2000-03-28 Hua Ye Lin Magnetic key lock assembly
FR2882385B1 (fr) 2005-02-24 2008-08-08 Ronis Sa Serrure de securite a moyens de rappel elastiques

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3425248A (en) * 1967-04-13 1969-02-04 Independent Lock Co Key ejector lock with anti-pick feature
US3465557A (en) * 1967-11-15 1969-09-09 Illinois Tool Works Freezer lock assembly
US3661000A (en) * 1970-06-12 1972-05-09 Chicago Lock Co Lock with universal key ejector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3425248A (en) * 1967-04-13 1969-02-04 Independent Lock Co Key ejector lock with anti-pick feature
US3465557A (en) * 1967-11-15 1969-09-09 Illinois Tool Works Freezer lock assembly
US3661000A (en) * 1970-06-12 1972-05-09 Chicago Lock Co Lock with universal key ejector

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4106317A (en) * 1977-06-06 1978-08-15 Illinois Tool Works Inc. Freezer lock assembly with key ejecting mechanism
US4910982A (en) * 1988-10-14 1990-03-27 Engineered Security Products Corporation Self-assembling locking device
US6237378B1 (en) * 1999-01-15 2001-05-29 Valeo Securite Habitacle Anti-theft device including an electric switch for detection of key insertion
US6565135B2 (en) * 2000-11-06 2003-05-20 Southco, Inc. Pivoting-handle device
CN100359122C (zh) * 2000-11-06 2008-01-02 索斯科公司 可枢轴转动的手柄锁定装置
AU2002237938B2 (en) * 2001-02-06 2006-06-29 Medeco Security Locks, Inc. Rotating pin tumbler side bar lock with side bar control
US6477875B2 (en) * 2001-02-06 2002-11-12 Medeco Security Locks, Inc. Rotating pin tumbler side bar lock with side bar control
US6945082B2 (en) 2001-02-06 2005-09-20 Medeco Security Locks, Inc. Key blank, key and master keying system
US20040246695A1 (en) * 2003-06-09 2004-12-09 Schlack Richard E. Compact PCI ejector latch
US7397674B2 (en) 2003-06-09 2008-07-08 Southco, Inc. Compact PCI ejector latch
US20050263378A1 (en) * 2004-05-25 2005-12-01 Davidsz Mark E Electric key switch with key sensing and ejection
US6969810B1 (en) 2004-05-25 2005-11-29 Rockwell Automation Technologies, Inc. Electric key switch with key sensing and ejection
US20080264123A1 (en) * 2005-12-20 2008-10-30 Huf Hulsbeck & Furst Gmbh & Co. Kg Cylinder Core
US7634929B2 (en) * 2005-12-20 2009-12-22 Huf Hulsbeck & Furst Gmbh & Co. Kg Cylinder core
CN101135214B (zh) * 2006-08-30 2012-01-25 海尔集团公司 一种冷藏装置的门锁结构
US20100000275A1 (en) * 2006-10-30 2010-01-07 Valeo Securite Habitacle Locking cylinder for a motor vehicle
US8146396B2 (en) * 2006-10-30 2012-04-03 Valeo Securite Habitacle Locking cylinder for a motor vehicle
US20170254118A1 (en) * 2012-06-06 2017-09-07 Novomatic Ag Locking device
US10626635B2 (en) * 2012-06-06 2020-04-21 Novomatic Ag Locking device
US9644397B2 (en) 2014-05-16 2017-05-09 The Eastern Company Food freezer locks and keys having safety features for preventing child entrapment

Also Published As

Publication number Publication date
JPS5641791B2 (it) 1981-09-30
IT973018B (it) 1974-06-10
FR2167040A5 (it) 1973-08-17
CA968174A (en) 1975-05-27
GB1391232A (en) 1975-04-16
DE2251686C3 (de) 1979-02-08
JPS4879098A (it) 1973-10-23
DE2251686A1 (de) 1973-07-19
AU4808272A (en) 1974-04-26
SE385722B (sv) 1976-07-19
DE2251686B2 (de) 1978-06-22

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