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Publication numberUS3792888 A
Publication typeGrant
Publication dateFeb 19, 1974
Filing dateJan 26, 1973
Priority dateJan 26, 1973
Also published asCA978228A1
Publication numberUS 3792888 A, US 3792888A, US-A-3792888, US3792888 A, US3792888A
InventorsR Kambic
Original AssigneeFolger Adam Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Electric lock
US 3792888 A
Abstract
An electric lock having two-part bolt with interposed bolt spring and pin and slot connections, a bell crank pivotally connected to bolt, solenoid means for swinging bell crank, a spring for swinging bell crank in one direction when power to solenoid means is shut off, a dead lock lever movable from active to inactive position by the bell crank as latter moves bolt to retracted position, and spring means automatically operable to move dead lock lever to active position into the path of retracting movement of the bolt, when bolt is in extended position, to prevent movement of bolt to retracted position by means other than bell crank, the bolt spring protecting the bell crank and solenoid means against damage by exterior forces applied to the bolt.
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United States Patent [1 1 Kambic I 1 ELECTRIC LOCK [75] Inventor: Raymond V. Kambic, Joliet, Ill.

[73] Assignee: Folger Adam Company, Joliet, I11. 22 Filed: Jan. 26, 1973 [21] Appl. No.: 327,068

[52] US. Cl .l 292/173, 292/144, 292/153 Primary mma-H HamPt n HERE? Attorney, Agent, or Firm-Davis, McCaleb & Lucas Feb. 19, 1974 57] ABSTRACT An electric lock having two-part bolt with interposed bolt spring and pin and s'lot'connections, a bell crank pivotally connected to bolt, solenoid means for swinging bell crank, a spring for swinging bell crank in one direction when power to solenoid means is shut off, a dead lock lever movable from active to inactive position by the bell crank as latter moves bolt to retracted position, and spring means automatically operable to move dead lock lever to active position into the path of retracting movement of the bolt, when bolt is in extended position, to prevent movement of bolt to retracted position by means other than bell crank, the bolt spring protecting the bell crank and solenoid means against damage by exterior forces applied to the bolt.

8 Claims, 5 Drawing Figures FTITFCTTT 1 ELECTRIC LOCK BACKGROUND OF THE INVENTION SUMMARY OF THE INVENTION This invention employs a single force application, first to move a dead lock lever to inactive position, and

then to retract the bolt in an electric lock. More specifically, it employs a dead lock lever spring-urged into active position into the path of retracting movement of a bolt in extended position, and a bell crank pivotally connected to the bolt for moving it between retracted and extended positions and having an end engaging the dead lock lever to move it to inactive position. The. bell crank also is pivotally connected to solenoid means for actuation thereby, and the latter optionally may comprise one or. two solenoids. In either case, spring means is included for swinging the bell crank in one direction,

and such bell crank spring means preferably is arranged to move the bolt to retracted position so as to function as a fail-safe feature in the event of failure of the power supply tothe solenoid means.

This invent-ion also provides for the protection of the operating mechanism insuch an electric lock by makin g the bolt in two parts and interposing a spring therebetween to initially, absorb any retracting force applied exteriorly when the boltis extended in order to cushion the bolt-stopping action of the dead lock lever, andwhich prevents damage to the bell crank from exterior forces applied to the boltwhen it is retracted andpossi ble rendering of the bell crank inoperative by the solenoid means. The simplified construction employed further facilitates inclusion in this electric lock of switch means for controlling door and bolt position signals.

In The Drawings:

FIG. 1 which is a front elevational view of a lock embodying the features of this invention, with the forward cover plate of the casingremoved;

FIG. 2 is a rear elevation of a portion of the lock of FIG. 1, with the rear cover plate removed;

FIGS. 3 and 4 are vertical sectional views taken substantially on the lines 3-3 and 4-4, respectively, of FIG. 1; and

FIG. 5-is a bottom plan side of FIG. 1.

DESCRIPTION OF'Il-IE PREFERRED EMBODIMENT Referring more particularly to the drawings, reference numeral 11 indicates in general an electric lock embodying the features of this invention which is enclosed in a case assembly or casing meansincluding front and rear cover plates 12 and 13, respectively, and a face plate 14v secured together in any suitable manviewas seen from the under ner. As will be understood by those skilled in the art, this case assembly is adapted to be mounted in well known manner in position to cooperate with either a swinging or sliding door having means (not shown) for lockingly receiving the bolt of the loc This comprises a two-part bolt made up, as best seen in FIGS. 1 and 3, ofa bolt pin or inner 15 having a cross pin 16 extending into'slots or apertures 17 in the walls of an inner bored portion of a deadbolt or outer part 18. Such pin and slot connections 16, 17 permit but limit longitudinal movements of the inner and outer parts 15 and 18, and a compression spring 19 is disposed in the inner bored'portion of the deadbolt 18 between the latter and the lower end of the bolt pin 15 disposed therein. The faceplate 14 is provided with an aperture 21 accommodating the deadbolt l8, and a bolt guide or collar 22 is secured in any suitable manner to, and extends upwardly from, the casing means in vertical alignment with the aperture 21. The upper end of that bolt guide 22 cooperates with a flange 23 on the upper or inner end of the deadbolt 18 to limit downward or extended movement of the bolt, as best seen in FIG. 1, wherein the bolt is illustrated in its extended position. I

Pivotallymounted at its upper end on a cross stud 24 is a dead lock lever 25, the lower end of which is urged in a counterclockwise direction (viewing FIG. 1) to active position into the path of retracting movement of the deadbolt 18, 23 by a spring 26. The inner vertical edge of this dead lock lever 25 is shaped to provide a cam surface 27 with which the outer end of the central arm of a bell crank 28 cooperates in a manner to be later described.

This bell crank 28 is pivotally mounted on a cross shaft 29 supported by a suitable vertical bracket 30, and its central arm is pivotally connected near its outer end by means of a link 31 to thebolt pin or inner part 15 of the two-part bolt. A bell crank spring 32 has one end engaging in an aperture 33 in bracket 30 and its other end terminating in a bent portion adapted to engage either the lower or upper edge of the central arm of the bell crank 28. As illustrated in FIG. .1, this bent end ofthe spring 32 engages the lower edge of the central arm to urge the bell crank 28 in a clockwise direction. If for reasons which will hereinafter be better appreciated it is desired to employ this spring 32 to urge the bell crank 28 in a counterclockwise direction, it is necessary only to remove the ends of the spring from their engagement with the bell crank and the bracket and reverse the spring so that the longer bent end engages. the opposite edge of the central portion while the other end extends into the aperture 33 from the opposite side. I

Solenoid means are provided for swinging the bell crank 28which are illustrated in FIG. 1 as comprising a first or lower solenoid 34 and a second or upper solenoid 35 secured in any suitable manner to the case assembly interiorly thereof. The plungers of these solenoids 34, 35 are pivotally connected, respectively, .to the lower and upper ends of the bell crank 28 by means of links 36 which are similar to the link 31. Thus, energization of the lowersolenoid 34 will pull its plunger inwardly, or to the right in FIG. 1 to swing the bell crank 28 counterclockwise and move the bolt to its extended position. Such movement of the belly crank 28 also results in the plunger of the upper solenoid 35 being pulled to its extended position. Conversely, when the upper solenoid 35 is energized and solenoid 34 is deenergized, the bell crank 28 will be swung clockwise from its position of FIG. 1. The initial portion of such movement of the bell crank 28 results in the outer end of its central arm moving upwardly along the cam surface 27 to swing the dead lock lever 25 clockwise against the action of its spring 26. This clears the lower end of the dead lock lever 25 from the bolt, moving it outwardly beyond the path of upward movement of the flange 23 on the deadbolt 18. Continued such clockwise movement of the bell crank 28 moves the bolt upwardly or inwardly to its retracted position in which the lower end of the deadbolt 18 is within the aperture 21 and substantially flush with the outer surface of the face plate 14. At the same time, this clockwise movement of the bell crank 28 pulls the plunger of the lower solenoid 34 outwardly to its extended position.

Signal switch means are provided for controlling signal means indicating the locked or unlocked position of the bolt or its extended or retracted position which comprises a lower microswitch 37 and an upper microswitch 38 suitably mounted interiorly of the casing assembly, as shown in FIG. 2, for alternate actuation by a switch tripper in the form of a stud 39 mounted in, and extending rearwardly from, the central arm of the bell crank 28. This signal switch means also includes a door position signal switch 41 suitably mounted interiorly of the case assembly, as shown in FIGS. 1, 2 and 4. A switch tripper in the form of a stud 42 (FIG. 4) is mounted in a switch cam 43 which is pivoted interiorly of the casing means at 44. A spring 45 urges the lower end of the switch cam 43 downwardly or outwardly of the case assembly through an aperture 46 (FIG. provided in the face plate 14. As will readily be appreciated, when the door associated with this electric lock is in closed position, whether it be a swinging or sliding door, the cam 43 will have been swung inwardly or upwardly about its pivot 44 and against the action of its spring 45 by the door to move the stud 42 into switch tripping relationship with the microswitch 41. The latter is connected in the circuit of a suitable signal means (not shown) so that a signal will be given thereby to indicate whether the door is in open or closed position. In similar manner, the microswitches 37 and 38 are connected in the circuit of suitable signal means (not shown) to indicate, respectively, whether the deadbolt 18 is in extended position, as illustrated in the instant drawings, or in retracted or unlocked position.

From the foregoing description, it will be apparent that energization of the first or lower solenoid 34 will swing the bell crank 28 counter-clockwise in FIG. 1 to move the deadbolt 18 to locked or extended position. This results in the deadlock lever being swung by its spring 26 into active or locking relationship with respect to the flange 23 on the deadbolt 18. With the parts in such locked position of FIG. 1, deenergization of the lower solenoid 34 and-energization of the upper solenoid will swing the bell crank 28 clockwise about its pivot 29. This first will cause the outer end of .the central arm of bell crank 28 to move upwardly along the cam surface 27 of the dead lock lever 25 to swing the latter clockwise to inactive position, thereby clearing its lower end from the path of upward movement of the dead-bolt flange 23. Continued clockwise swinging of bell crank 28 will retract the deadbolt 18 to its unlocked position. If desired, the upper solenoid 35 may be dispensed with, since the bell crank spring 32 is sufficiently strong, when the lower solenoid 34 is deenergized, to swing the bell crank 28 clockwise from its position of FIG. 1 to automatically effect the abovedescribed unlocking operation. This constitutes a fail safe arrangement which assures automatic unlocking or retraction of the deadbolt 18 in the event of power failure. Likewise, as noted hereinbefore, the position of the bell crank spring 32 may be reversed to impose a counterclockwise rotating force upon the bell crank 28 to automatically move the deadbolt 18 to extended or locked position. In such arrangement, the lower solenoid 34 may be dispensed with, the upper solenoid 35 being employed to move the deadbolt 18 to retracted or unlocked position.

During all such operations of this electric lock, it will be appreciated that the bolt spring 19 and the pin and slot connections 16, 17 between the bolt pin 15 and the deadbolt 18 effectively protect the bell crank 28 and the solenoids 34, 35 against damage by any exterior forces applied to the deadbolt 18. When the latter is in its locked or extended position of the drawings, this spring 19 cushions the bolt-stopping action of the dead lock lever 25 when upward force is applied to the deadbolt 18. This two-part construction of the bolt likewise prevents damage to the bell crank 28 in response to any exterior forces applied to the deadbolt 18 when the latter is in its retracted position, thus assuring that the operating mechanism cannot be damaged or rendered inoperative to effect a locking operation.

It is thought that the invention and many' of its attendant advantages will be understood from the foregoing description, and it will be apparent that various changes may be made in the form, construction, and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing all of its material advantages, the forms hereinbefore described being merely preferred embodiments thereof.

I claim:

1. An electric lock, comprising casing means, a bolt having an inner part and an outer part, means for guiding movement of said bolt between retracted position and extended position with said outer part protruding from said casing means, a bell crank pivotally mounted in said casing pivotal connections between said bell crank and said bolt, solenoid means pivotally connected to said bell crank for swinging the same to move said bolt, a dead lock lever movable from active to inactive position by said bell crank as said bolt is being retracted, and spring means automatically operable to move said dead lock lever toactive position into the path of retracting movement of said bolt, when the latter is in extended position, to prevent movement of said bolt to retracted position by means other than said bell crank.

2. An electric lock according to claim 1, wherein said solenoid means comprises a first solenoid operable to swing said bell crank to move said bolt to extended position and a second solenoid operable to swing said bell crank to move said bolt to retracted position.

3. In an electric lock according to claiml, bell crank spring means operable to swing said bell crank to move said bolt upon deenergization of said solenoid means.

4. In an electric lock according to claim 1, means interposed between said inner and outer parts of said bolt to initially absorb any retracting force applied exteriorly to said bolt when the same is in extended position with the positioning of said bolt by said bell crank.

7. An electric lock according to claim 6, wherein said signal switch means comprises two microswitches and a switch tripper for alternately actuating the same mounted on said bell crank.

8. In an electric lock according to claim 1 for cooperation with a door movable between closed and open positions relative thereto, door position signal switch means, comprising a switch mounted interiorly of said casing means, a cam mounted in said casing means having an outer portion protruding through an aperture therein for movement by said door, and means mounted on said cam interiorly of said casing means for actuating said switch.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US368212 *Mar 20, 1887Aug 16, 1887THE YALE a TOWNE MANUFACTURING COMPANYNecticut
US580820 *Oct 13, 1896Apr 13, 1897 Electromagnetic locking device
US1706486 *May 19, 1927Mar 26, 1929Gasey Leo LesterDead-locking mechanism for door latches
US1946384 *Feb 16, 1933Feb 6, 1934Lucien R BarilElectric lock
US2783617 *Nov 5, 1954Mar 5, 1957Halovatch PaulElectromagnetic refrigerator door lock
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3897093 *May 9, 1974Jul 29, 1975Wico CorpElectrical door lock
US4073518 *May 28, 1976Feb 14, 1978Goodwin Charles MElectrically and manually actuatable door locking structure
US4254582 *Jul 25, 1979Mar 10, 1981Mcgee Michael HElectrically actuated overhead garage door opener assembly
US4355830 *Feb 25, 1980Oct 26, 1982Cni IncorporatedElectrical locking mechanism
US4593543 *Oct 5, 1983Jun 10, 1986Folger Adam CompanySecurity lock
US5228730 *Sep 2, 1992Jul 20, 1993Security People, Inc.Apparatus for converting mechanical locks to operate electrically using momentary power
US5492382 *May 27, 1994Feb 20, 1996Security & Control Equipment, Inc.Electro-mechanical locks for security accesses
US5636880 *Oct 11, 1995Jun 10, 1997Milocon CorporationElectronic lock
US5852944 *Apr 18, 1997Dec 29, 1998Stephen C. CohenRemotely controlled door lock
US6032500 *Dec 28, 1998Mar 7, 2000Stephen C. CohenKit for retrofitting a door with a security lock system
US6953210 *Jan 17, 2002Oct 11, 2005Abloy OySolenoid arrangement for controlling handle operation in a door lock
US20090282875 *May 19, 2008Nov 19, 2009Robert John OlmstedMethod and Apparatus Pertaining to Selectively Blocking a Lock Hasp
DE3028295A1 *Jul 25, 1980Feb 12, 1981Michael H McgeeElektrisch betaetigte garagenkipptoroeffnervorrichtung und insbesondere dafuer vorgesehenn elektromagnetkonstruktion
DE4430736C1 *Aug 30, 1994Nov 30, 1995Codic Elektronische SicherheitElectromagnetic door lock operable from either side
Classifications
U.S. Classification292/173, 292/144, 292/153
International ClassificationE05B47/06, E05B47/04
Cooperative ClassificationE05B47/0004, E05B47/0002, E05B2047/0007, E05B47/0607
European ClassificationE05B47/00A1, E05B47/06B
Legal Events
DateCodeEventDescription
Aug 8, 1994ASAssignment
Owner name: FIDELITY BANK, N.A., PENNSYLVANIA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:FOLGER ADAM COMPANY;WILLIAM BAYLEY COMPANY, THE;STEWART-DECATUR SECURITY SYSTEMS, INC.;REEL/FRAME:007091/0522
Effective date: 19940701
Aug 8, 1994AS02Assignment of assignor's interest
Owner name: FIDELITY BANK, N.A. BROAD AND WALNUT STREETS PHILA
Owner name: FOLGER ADAM COMPANY
Owner name: STEWART-DECATUR SECURITY SYS
Owner name: WILLIAM BAYLEY COMPANY, THE
Effective date: 19940701
Jan 11, 1988ASAssignment
Owner name: CONTINENTAL ILLINOIS NATIONAL BANK AND TRUST COMPA
Free format text: RE-RECORD OF AN INSTRUMENT RECORDED MARCH 20, 1987, REEL 4686 FRAME 703-706, TO CORRECT A PATENT NUMBER ERRORNEOUSLY STATED AS 4,221,443.;ASSIGNOR:FOLGER ADAM COMPANY, A DE CORP;REEL/FRAME:004830/0580
Effective date: 19861222
Owner name: FIDELITY BANK, N.A., AS AGENT, BROAD AND WALNUT ST
Owner name: NATIONAL WESTMINSTER BANK, USA
Owner name: NATIONAL WESTMINSTER BANK, USA,STATELESS
Free format text: RE-RECORD OF AN INSTRUMENT RECORDED MARCH 20, 1987, REEL 4686 FRAME 703-706, TO CORRECT A PATENT NUMBER ERRORNEOUSLY STATED AS 4,221,443;ASSIGNOR:FOLGER ADAM COMPANY, A DE CORP;REEL/FRAME:004830/0580
Owner name: FIDELITY BANK, N.A., AS AGENT,PENNSYLVANIA
Jan 11, 1988AS34Re-record of an instrument recorded
Free format text: FIDELITY BANK, N.A., AS AGENT, BROAD AND WALNUT STREETS, PHILADELPHIA, PA 19109 * FOLGER ADAM COMPANY, A DE CORP : 19861222
Mar 20, 1987ASAssignment
Owner name: CONTINENTAL ILLINOIS NATIONAL BANK AND TRUST COMPA
Owner name: FIDELITY BANK, N.A., AS AGENT, BROAD AND WALNUT ST
Free format text: SECURITY INTEREST;ASSIGNOR:FOLGER ADAM COMPANY, A CORP OF DE.;REEL/FRAME:004686/0703
Effective date: 19861222
Owner name: FOLGER ADAM COMPANY
Free format text: CHANGE OF NAME;ASSIGNOR:SUNROC CORPORATION;REEL/FRAME:004686/0708
Effective date: 19851212
Owner name: NATIONAL WESTMINSTER BANK, USA
Owner name: SUNROC CORPORATION, C/O SUNROC CORPORATION, GLEN R
Free format text: MERGER;ASSIGNOR:TELKEE, INC., (MERGED INTO);REEL/FRAME:004686/0731
Effective date: 19850816
Free format text: MERGER;ASSIGNORS:FOLGER ADAM COMPANY (MERGED INTO);SFA ACQUISITION COMPANY, (CHANGED INTO);REEL/FRAME:004686/0684
Effective date: 19860329
Free format text: SECURITY INTEREST;ASSIGNOR:FOLGER ADAM COMPANY;REEL/FRAME:004686/0703
Owner name: FIDELITY BANK, N.A., AS AGENT,PENNSYLVANIA
Owner name: FOLGER ADAM COMPANY,ILLINOIS
Owner name: NATIONAL WESTMINSTER BANK, USA,NEW YORK
Owner name: SUNROC CORPORATION,PENNSYLVANIA
Free format text: MERGER;ASSIGNOR:TELKEE, INC.;REEL/FRAME:004686/0731
Owner name: FOLGER ADAM COMPANY,PENNSYLVANIA
Mar 20, 1987AS01Change of name
Owner name: FOLGER ADAM COMPANY
Effective date: 19851212
Owner name: SUNROC CORPORATION
Mar 20, 1987AS06Security interest
Owner name: FIDELITY BANK, N.A., AS AGENT, BROAD AND WALNUT ST
Effective date: 19861222
Owner name: FOLGER ADAM COMPANY, A CORP OF DE.
Mar 20, 1987AS03Merger
Owner name: SUNROC CORPORATION, C/O SUNROC CORPORATION, GLEN R
Effective date: 19850816
Owner name: TELKEE, INC., (MERGED INTO)