US3799592A - Dead bolt auxiliary latch - Google Patents

Dead bolt auxiliary latch Download PDF

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Publication number
US3799592A
US3799592A US00248425A US24842572A US3799592A US 3799592 A US3799592 A US 3799592A US 00248425 A US00248425 A US 00248425A US 24842572 A US24842572 A US 24842572A US 3799592 A US3799592 A US 3799592A
Authority
US
United States
Prior art keywords
bolt
extension
latching
arm member
positions
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
US00248425A
Other languages
English (en)
Inventor
J Babb
O Maurits
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.)
Dexter Lock Co
Original Assignee
Kysor Industrial Corp
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 Kysor Industrial Corp filed Critical Kysor Industrial Corp
Priority to US00248425A priority Critical patent/US3799592A/en
Priority to CA164,243A priority patent/CA972003A/en
Priority to AU52773/73A priority patent/AU5277373A/en
Application granted granted Critical
Publication of US3799592A publication Critical patent/US3799592A/en
Priority to JP1977109474U priority patent/JPS5540284Y2/ja
Assigned to KYSOR INDUSTRIAL CORPORATION, A CORP. OF reassignment KYSOR INDUSTRIAL CORPORATION, A CORP. OF ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: KYSOR INDUSTRIAL CORPORATION, A CORP. OF DE.
Assigned to DEXTER LOCK COMPANY, A CORP. OF DE. reassignment DEXTER LOCK COMPANY, A CORP. OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: KYSOR INDUSTRIAL CORPORATION
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
    • E05B63/0017—Locks with sliding bolt without provision for latching
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B15/00—Other details of locks; Parts for engagement by bolts of fastening devices
    • E05B15/16—Use of special materials for parts of locks
    • E05B15/1614—Use of special materials for parts of locks of hard materials, to prevent drilling
    • E05B15/1621—Hardened bolts, or bolts with hardened inserts
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S292/00—Closure fasteners
    • Y10S292/52—Rollbacks
    • 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
    • Y10T292/00—Closure fasteners
    • Y10T292/08—Bolts
    • Y10T292/096—Sliding
    • Y10T292/0969—Spring projected
    • Y10T292/097—Operating means
    • Y10T292/0977—Cam
    • Y10T292/0982—Bolt blocking or disabling means
    • Y10T292/0983—Involves rollback
    • 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
    • Y10T292/00—Closure fasteners
    • Y10T292/08—Bolts
    • Y10T292/096—Sliding
    • Y10T292/1014—Operating means
    • Y10T292/1016—Cam

Definitions

  • ABSTRACT A dead bolt lock mechanism having a locking bolt extendable by a rotary drive arm and locked into ex tended position by a special latching means. Spring biasing means acting on the latch holds it in position to thereby allow the mechanism to be mounted in virtually any orientation within a panel.
  • a double latch of the bolt is achieved with a combination of the noted latching means with an over-center latch provided by the rotary drive arm.
  • FIGA' DEAD BOLT AUXILIARY LATCH BACKGROUND OF THE INVENTION This invention relates to locking mechanisms and particularly to dead bolt locking mechanisms as used, for example, in a door panel to supplement the conventional door lock.
  • the dead bolt is manually extendable into and out of locking engagement with a cooperative recess in a door jamb.
  • Locking means within the housing prevents bolt retraction other than by a key from the outside or a turn control on the inside.
  • the present invention provides a dead bolt locking mechanism which includes a pivotally mounted camactuated, spring-biased auxiliary locking mechanism or locking bar.
  • the locking bar is operable against the bolt actuating mechanisms to lock the bolt and securely hold it in its extended position.
  • the locking bar can be released only by retraction of the bolt in a conventional manner, i.e., rotation of the radius arm by a key or inside-mounted knob.
  • the locking bar is spring biased into locking position with the bolt when in its extended position such that the bolt may be mounted in virtually any position within a door panel and yet remain operative as the various component parts wear.
  • the novel dead bolt lock mechanism possesses a double lock feature relative to the dead bolt since, not only is the dead bolt secured against retraction by this locking bar, but also the retractor bar or bolt extension for the dead bolt is prevented from retracting by the over-center rotary radius arm.
  • the radius arm cooperates with the bolt extension to hold the bolt in retracted position.
  • Another object of the present invention is to provide a dead bolt lock having a locking bar therein operable to lock the bolt in a retracted position.
  • Another object of this invention is to provide an effective one inch throw dead bolt mechanism with unique bolt locking features.
  • Another object of this invention is to provide a novel dead bolt structure achieving a double lock for the extended bolt to prevent its forceful or accidental retraction.
  • FIG. I is a plan view of the dead lbolt lock of the pres ent invention.
  • FIG. 2 is an end view of the dead bolt lock mechanism shown in FIG. 1;
  • FIG. 3 is a cross-sectional view taken along the plane IIIIII of FIG. 2 illustrating the lock mechanism with the bolt in a retracted position;
  • FIG. 4 is a cross-sectional view similar to FIG. 3 illustrating the bolt in an extended position
  • FIG. 5 is a cross-sectional view taken along the plane VV of FIG. 1.
  • a movable bolt 112 is generally contained within a tubular housing 14 having a face plate 16 fixed to the outer end, i.e., front end thereof in a conventional manner.
  • a U- shaped channel-like housing extension 18 projects from the lower rear of the opposite end of housing 14.
  • Extension 118 is secured to the tubular housing as by riveting, welding, or the like.
  • An elongated bolt extension or retractor bar 20 is slidably mounted on an upper edge of extension 118 and extends through an opening 22 in the rear of the tubular housing 14.
  • the bolt extension 20 is an elongated U-shaped channel member with an upper leg or sliding portion 24 slidably mounted on the extension 18.
  • a shorter leg 26 depending downwardly is in a slot 28 (FIG. 5) formed in the rear portion of bolt 12.
  • the retractor bar is secured to bolt 12 by having this leg 26 attached to the bolt in this slot 28 by a roll pin 30.
  • a hardened steel bolt pin 32 is placed within an opening 33 located along the axial length of bolt 12. The pin 32 is free to rotate in the opening 33 and is provided as a security measure to prevent the bolt from being cut as by a saw.
  • a transverse abutment tab 34 is formed across the open side of the channel.
  • An opening 36 is provided in the upper portion of leg 24 to receive the extended end of a radius arm or rotary drive arm 38 as will be more fully described hereinafter.
  • a bias spring 40 is fixed at one of its ends in an upper portion of leg 24 near the intersection with shorter leg 26. The opposite or free end of the bias spring extends outwardly away from the bolt between the legs of the bolt extension and downwardly to bias an auxiliary latch member or looking bar 42 downwardly onto tab 34.
  • the locking bar 42 is an elongated plate member that extends along the length of the bolt extension 20 and extension 18 and between the side walls of the bolt extension.
  • the locking bar 42 is provided with a downwardly turned mounting flange 44 at the rearward end thereof by which it is pivotally mounted and secured to housing extension 18 by a pin 46.
  • a curved concave cam-follower surface 48 is formed along a portion of the underside length of the locking bar for cooperative engagement with a pin 50 forming a cam mounted in radius arm 38.
  • the cam follower surface 48 tapers upwardly and then downwardly forming a step 49 adjacent the surface 48 toward the pivoted end of the bar.
  • the pin 50 and radius arm 38 are rotatably mounted in extension 18.
  • the radius arm 38 includes a pair of upstanding legs 55 (FIG. 2) connected together at their upper portion and extending through opening 36 in bolt extension 20.
  • the upper extremity of the legs 55 includes aligned notches 57 which are adapted to engage the sidewall 37 of opening 36 when the bolt is retracted.
  • the locking bar 42 passes between legs 55 such that they are free to travel and rotate along a portion of its length.
  • the radius arm 38 at its lower extremity, includes a pair of axially outwardly directed bosses or hubs 56 on each leg 55 which are journaled in the sides of housing extension 18.
  • Mounting holes 58 in extension 18 are in alignment with an opening 60 provided in boss 56.
  • the openings in the bosses or hubs 56 are provided for driving engagement with a drive bar (not shown) connected to an external key-operated lock mechanism and an internal manual lock actuating knob or turn control for operating the mechanism in a conventional manner.
  • the pin 50 is staked between the legs 55 of radius arm 38 and pivots in an arc with rotation of the hubs 56 in housing extension 18.
  • the pin forms a cam between the legs of radius arm 38 and engages cam follower surface 48 of locking bar 42.
  • radius arm 38 is rotated to its extreme clockwise position so that notch 57 abuts against the side of opening 36 in bolt extension 20. This prevents the bolt from being extended accidentally as by slamming the door.
  • the free end of bias spring 40 is positioned on the upper portion of the locking bar 42 such that the bar is biased into contact with the top surface of abutment 34 positioned on the retractor bar.
  • radius arm 38 is totated in a counterclockwise direction (FIG. 4) so that the end of radius arm 38 will abut the lefthand side of opening 36 in retractor bar 20 and move bolt extension 20 and the bolt fixed thereto to the left.
  • arm 38 when arm 38 is rotated sufficiently to throw the dead bolt to its extended position, arm 38 is over center such that its radially outer end drops in behind the upper crosspiece 35 of bolt extension 20, i.e., immediately ahead of opening 36. Hence, any attempt to push bolt 12 back into its housing will not only cause tab 34 to strike surface 60 of arm 42, but also would cause crosspiece 35 to strike the radially outer end of arm 38. Since arm 38 is then over center, the force will be along its length to its rotational mounting axis preventing the retractor and bolt from being so pushed. This not only provides a double lock safety when the bolt is fully extended, it also effects a latch if the bolt accidentally is not fully extended.
  • the present invention provides a novel latch mechanism for use in a dead bolt lock construction.
  • the latch is relatively simple in construction. It is cam actuated and spring biased into position such that it may be mounted in relatively any orientation without fear of the consequences of improper installation.
  • the component parts making up the completed latch assembly are formed by relatively inexpensive manufacturing techniques as by stamping and bending, thereby resulting in a latch assembly which is relatively low in cost.
  • the device is effective even for a large bolt throw of say, about 1 inch. It effects a double lock against inadvertent or unauthorized dead bolt retraction and inadvertent extension.
  • a dead bolt lock construction having a frame; a bolt housing; a bolt shiftable between extended and retracted positions; a bolt extension slidably mounted on said frame connected to said bolt, extending along said frame; and actuating means operating on said bolt extension for shifting said bolt between said positions, the improvement comprising:
  • latching means for said bolt shiftable between latching and nonlatching positions to hold said bolt'in extended position, said latching means including abutment means on said bolt extension;
  • said shifting means includes a cam fixed on said actuating means, said arm member engageable with said cam to pivot said arm about said frame in response to movement of said actuating means to thereby shift said latching means between said positions.
  • said actuating means comprises a radius arm having one end thereof pivotally mounted in said frame; and cam means extending radially outwardly from said one end for operative engagement with said arm member to shift same between latching and nonlatching positions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Lock And Its Accessories (AREA)
US00248425A 1972-04-23 1972-04-23 Dead bolt auxiliary latch Expired - Lifetime US3799592A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US00248425A US3799592A (en) 1972-04-23 1972-04-23 Dead bolt auxiliary latch
CA164,243A CA972003A (en) 1972-04-23 1973-02-21 Dead bolt auxiliary latch
AU52773/73A AU5277373A (en) 1972-04-23 1973-03-01 Deadbolt auxiliary latch
JP1977109474U JPS5540284Y2 (enExample) 1972-04-23 1977-08-15

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00248425A US3799592A (en) 1972-04-23 1972-04-23 Dead bolt auxiliary latch

Publications (1)

Publication Number Publication Date
US3799592A true US3799592A (en) 1974-03-26

Family

ID=22939070

Family Applications (1)

Application Number Title Priority Date Filing Date
US00248425A Expired - Lifetime US3799592A (en) 1972-04-23 1972-04-23 Dead bolt auxiliary latch

Country Status (4)

Country Link
US (1) US3799592A (enExample)
JP (1) JPS5540284Y2 (enExample)
AU (1) AU5277373A (enExample)
CA (1) CA972003A (enExample)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4228669A (en) * 1978-07-03 1980-10-21 Kysor Industrial Corporation Double cylinder lock with key retention
US4685709A (en) * 1984-05-29 1987-08-11 R. R. Brink Locking Systems, Inc. Deadlocked latch having disc and motor actuators
US4921290A (en) * 1988-11-04 1990-05-01 Masco Building Products Corp. Backset adjustable door latch
US4974884A (en) * 1989-12-22 1990-12-04 Masco Building Products Corp. Selective self-locking deadbolt latch
US5257837A (en) * 1992-03-03 1993-11-02 Masco Building Products Corp. Door latch with adjustable backset and deadlocking feature
GB2376262A (en) * 2001-06-06 2002-12-11 Secr Defence Lock with drill resistant lock bolt member
US20220213723A1 (en) * 2019-09-25 2022-07-07 Uhlmann & Zacher Gmbh Door lock adapter

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8158A (en) * 1851-06-17 Mahlon gregg
US1864429A (en) * 1929-01-16 1932-06-21 Goroshko Will Lock
US2533023A (en) * 1945-12-22 1950-12-05 Nat Brass Co Night latch
US2769652A (en) * 1955-03-28 1956-11-06 Dexter Ind Inc Deadlocking mechanism for auxiliary door locks
US2803479A (en) * 1955-03-16 1957-08-20 Dexter Ind Inc Lock mechanism
US3751085A (en) * 1972-02-07 1973-08-07 Norris Industries Incremental dead bolt latch

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8158A (en) * 1851-06-17 Mahlon gregg
US1864429A (en) * 1929-01-16 1932-06-21 Goroshko Will Lock
US2533023A (en) * 1945-12-22 1950-12-05 Nat Brass Co Night latch
US2803479A (en) * 1955-03-16 1957-08-20 Dexter Ind Inc Lock mechanism
US2769652A (en) * 1955-03-28 1956-11-06 Dexter Ind Inc Deadlocking mechanism for auxiliary door locks
US3751085A (en) * 1972-02-07 1973-08-07 Norris Industries Incremental dead bolt latch

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4228669A (en) * 1978-07-03 1980-10-21 Kysor Industrial Corporation Double cylinder lock with key retention
US4685709A (en) * 1984-05-29 1987-08-11 R. R. Brink Locking Systems, Inc. Deadlocked latch having disc and motor actuators
US4921290A (en) * 1988-11-04 1990-05-01 Masco Building Products Corp. Backset adjustable door latch
US4974884A (en) * 1989-12-22 1990-12-04 Masco Building Products Corp. Selective self-locking deadbolt latch
FR2656362A1 (fr) * 1989-12-22 1991-06-28 Masco Building Produits Corp Verrou a pene dormant a verrouillage automatique selectif.
DE4041218A1 (de) * 1989-12-22 1991-07-04 Masco Building Products Corp N Wahlweise selbstverriegelndes einriegelschloss
BE1005314A3 (fr) * 1989-12-22 1993-06-29 Masco Building Products Corp Serrure a pene dormant a verrouillage automatique selectif.
US5257837A (en) * 1992-03-03 1993-11-02 Masco Building Products Corp. Door latch with adjustable backset and deadlocking feature
GB2376262A (en) * 2001-06-06 2002-12-11 Secr Defence Lock with drill resistant lock bolt member
WO2002099230A1 (en) 2001-06-06 2002-12-12 Qinetiq Limited Drill resistant lock
US20040148990A1 (en) * 2001-06-06 2004-08-05 Brown Peter Mark Drill resistant lock
US7287405B2 (en) 2001-06-06 2007-10-30 Qinetiq Limited Drill resistant lock
US20220213723A1 (en) * 2019-09-25 2022-07-07 Uhlmann & Zacher Gmbh Door lock adapter
US11624219B2 (en) * 2019-09-25 2023-04-11 Uhlmann & Zacher Gmbh Door lock adapter

Also Published As

Publication number Publication date
AU5277373A (en) 1974-09-05
CA972003A (en) 1975-07-29
JPS5330491U (enExample) 1978-03-15
JPS5540284Y2 (enExample) 1980-09-19

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Legal Events

Date Code Title Description
AS Assignment

Owner name: KYSOR INDUSTRIAL CORPORATION, A CORP. OF MI.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KYSOR INDUSTRIAL CORPORATION, A CORP. OF DE.;REEL/FRAME:004474/0605

Effective date: 19850822

AS Assignment

Owner name: DEXTER LOCK COMPANY, A CORP. OF DE.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KYSOR INDUSTRIAL CORPORATION;REEL/FRAME:004493/0821

Effective date: 19851115