US1383269A - Electric-lock strike - Google Patents

Description

' N. FIENBERG AND W. L. WAKEHAM.

ELECTRIC LOCK STRIKE.

ABPUCAHON FILED SEPT, 21, 1920.

Patented June 28, 1921.

2 SHEETS-SHEET 1- INVENTORSI NATHAN FIENBERG WALTER LESLIIE WAKEHAM BLJ 1mm ATTORNEY N. FIENBERG AND w..L, WAKEHAM.

ELECTRIC LOCK STRIKE. APPLICATION Fl LED SEPT-21. 1920.

m vizmoaa NATHAN FIENBER G WALTERLESLIE WAKLHAM;

Their- ATTORNEY UNITED STATES NATHAN rrnnnnne, or BONDI, NEAR SYDNEY,

Ann WALTER LESLIE WAKEHAM, or

FIVE DOCK, NEAR SYDNEY, NEW SOUTH WALES, AUSTRALIA.

ELECTRIC-LOCK STRIKE.

Specification of Letters Patent.

Patented June 28, 1921.

Application filed September 21, 1920. Serial No. 411,853.

To all whom it may concern Be it known thatv we, NATHAN FIENBERG and WALTER LESLIE .WAKEHAM, subjects of the King of Great Britain and Ireland, residing at Doretta, Curlewis street, Bondi, near Sydney, New South Wales, Australia, and F ortescue street, Five Dock, near Sydney, aforesaid, respectively, have invented certain new and useful Improvements in Electric-Lock Strikes, for which I have filed an application in the Commonwealth of Australia, #l2,405, filed Sept. 5, 1919, andof which the following is a specification.

This invention relates to electrically controlled latch locks for doors, and it has been devised with the object of providing an effective common entry door latch lock control system for apartment houses and flats whereby the occupant of any room or flat may release said lock to admit an incomer, maytascertain if the door has been opened thereafter, and may relock the door by operating press button. control switches located in the flat, and whereby also the lock will be automatically reset before the door has been fully opened prior to the entry of an incomer so that when reclosed it will be again effectively relocked.

In the accompanying drawings, Figure 1 is an elevational view of the control board which is located in a flat or apartment;

Fig. 2 is a transverse section on the line 22 Fig. 1;

Fig. 3 is an elevational View of the look as viewed from the inner side, that is the side of the look toward which the door closes; portion of the bolt is shown in section in this view Fi 4 is a horizontal section Hin 3,

Fi 5 is a horizontal section on the plane 55% ig. 3,

on the plane Fig. 6 is a diagrammatic view showing.

the circuit arrangement, and explanatory of the operation of certain parts of the lock; and

Fig. 7 is. a fragmentary view explanatory of the automatic mechanicalre-locking device.

In Fig. 6, A represents a call or letter box fitting which is placed outside the common door or in a nearby position, one of these fittings being provided for each set of apartments or flats to which the said door serves as a common entry.

B represents a control board fitted in one fiat or apartment, C represents operative portions of the latch lock device, and D represents a call bell located in the fiat or apartment. The bell D may be actuated by a separate battery E orby the battery associated with the lock control equipment which will behereinafter described, and it is controlled by the push button F which is mounted in the apartment fitting A. An indicator window 10 is fitted in proximity to the door lock, it is preferably glazed with tinted glass on which directions may be engraved for the information of incomers. In a cavity behind this tinted glass is an electric filament lamp 11. One terminal of this lamp is wired to the contact spring 12 in the look, its other terminal is connected by a wire 13 in parallel to the indicator lamps 14 in the several 7 release magnet 24; the other terminal of the winding on that magnet is junctioned into the line to earth 19 from the magnet winding 17. The back spring 25 on the lock staple pawl 26 is adjusted to contact with the spring 12 when the pawl 26 is lifted by the magnet 18, but to break circuit at 12 when the pawl 26 is in the dropped or locked position; Said pawl is earthed at 27 or connected to a return wire.

One terminal of the battery 28 is earthed at 29; its other terminal is wired to the back plate 30 of the controlboard B. The magnet 24 is provided with a pendular armature 32 counterbalanced at 33 so that it will normally fall open-that is outward. An upbenttoe 34 on said armature is .engageable in a notch on the end of the pawl 26 and is also engageable with a spring raised knuckle64 in the latch staple 26. p v

' Referring to Figs. 1 and 2. The operating control board consists of a hollow back 50 covered with a face plate 51 through which the heads of finger buttons 15, 20, and 21 protrude. The stems of these but c with two stepped not mission to thecaller, presses the ton 15 on the board in his flat or apartment,

tons are metallic and are adapted to make contact with the back plate 30 of a box casing in which is mounted an insulatorsupport 53 on which the various electrical connections to the wires 13, 16 and 22 are fixed, the order of these connections being shown in'Fig. 1. Springs 54-serve to tons 15, 20 and 21 outward, and to establish contact between the stems of the buttons on the terminal fittings to which the several leads 16, 13 and 22 are connected up. It is to be noted that the push button 20 controls the circuit of the lamps '14 (B) and 11, these lamps being in series on the line 13. The lock'control device is a staple fitting adapted to be mortisedinto the door post 57 58 is the door, 59'the frame stop, and 60 the latch bolt of the door fitment. This latch bolt may be withdrawn by means of a latch key in the usual way so that the door may be opened without requiring operation of the electromagnetic control devices in which the invention consists. The latch 60 engages a hook shaped staple 36 which is mounted to'turn in ahorizontal path about a heavy pin 62. The staple 36 is pushed to ward the outer or locked position by means of a back spring 63; when it is retired it takes up the position shown in the dotted lines in-Fig. 5; In the top of the staple is an upwardly disposed knuckle pin 64 restingupon a light spring 65 in compression located in a cavity in the jaw portion .of the staple. fThe. staple is normally held in the outer or lOCkBClPOSltlOIl by means of a drop pawl 26, which is mounted to hang freely on a horizontal pin 68 fixed in the casing 69.

The forward end of this pawl 26 is formed hes 70, 71. It carries also the back spring 25 which is adapted to make contact when the pawl is lifted, with thefixed contact spring'12, the spring 12 being wired back to the lamp 11 as seen in Fig. 6. The binding screws to take the various connections are located above the top side of the casing 69 in a cavity 7 3 in the doorpost, this cavity allowing convenient room for carrying in and connecting up the wire terminals to said screws. v

The pawl 26 acts as armature to the unlatching electromagnet 18. The rear latching electromagnet 24 is arranged with its axis horizontal and its armature 32 pendent on apin 75, its upper portion being bent backward and counter-weighted as shown at 33, so that the toe34 on its lower end tends tobear outwardly against the nibbed end of the drop pawl 26.

The operation 1s as follows Bymeans of the pushbutton F a caller announces his presence by the ringing of the 'annunciator bell D in the flat or apartment sought. The occupier, desiring to give adpush buthold the but-- therefore informs the occupant v or not, as the indicator lamp 14 will glow until the door hasbeen thereby'establishing a circuit from the battery 28 through the unlatching electromagnet18. V immediately lifts the pawl armature 26 from the position shown in Fig. 3 up to the position shown in Fig. 6. As seen in Fig. 3 the lower notch 7 0 on the outer; end of the pawl 26 takes behind the head of the staple 36, and while located there it effectually checks movement of the staple 36 to release the latch bolt 60. .When, however, the pawl 26 is lifted to the position shown in Fig. 6

its upper notch 71comes above the toe 34 of the hanging armature 32, which immediately engages it and holds" it up; The staple 36 is thus leftfree subject' tothe pressure of the lightspring 63, so that if the door be pushed by the caller, the staple will swing back against the spring 63 from'the,

position shown in .fullf lines to the position shown in dotted lines, Fig. 5. When the pawl 26 is raised, the spring 25 makes contact with the spring 12, and this contact is held so long as the pawl 26 is in theupper position shown in Fig. 6. The occupier of the flat. or apartment, by pressing the button 20, in his control board, establishes a circuit through the localindicator lamp 14 and the admission indicato'rlamp 11, thereby 'assuring himself by observing his pilot light 14, in the first place, that the staple has been released,"and in the second place giving notice to the person calling for ad That magnet being then energized,

ission that the door lock has been released.

Immediately the door opening movement has brought the latch bolt 60 clear of the staple head 36 on which movement the staple is forced back to the dotted position Fig. 5, the knuckle 64 passes under the toe 34 of the hangingarmature 32. In the return movement of the staple 36 which occurs immediately 6O terminates, the knuckle 64 strikes the toe 34 of the armature 32 backward toward the magnet 24, thus dropping the pawl 26 from theposition shown in Figs. 6 and 7 to that shown in Fig; 3, so that the staple 36 is again locked by it automatically," even before the door has been opened sufficiently to clear the rabbet. When the pawl 26 is thus dropped, the' lampcircuit'is broken at 25-12, with the result that the lamps 14 and 11 are extinguished. Pressinghom'e the finger button 20 tov test the lampcircuit whether the door has been opened opened and will c'easeto glowafter it has been re-clo-sed. The door 58 is fitted with a self-closing spring of any ordinary'kind to insure that it'will'slamc1osed after being opened. If the occupier,;finding that a false call has been received, owing to the lamp 14 remaining continuing to glow 'as long as the button 20 is held pressedfand he therefore when contact with theflatch bolt determines to restore the staple to the locked position, the button 21 is pressed to establish a circuit through the line 22 and the resetting magnet 24. This happening, the armature 32 is pulled over, thereby drawing the armature toe 84 away from the upper notch 71 on the end of the pawl 26, thus allowing said pawl to drop to its normal locked position as shown in Fig. 3.

All the several apartments or flats in the building being connected up in parallel, each local circuit self contained with the indicator lamp 11 common to all, a complete system of control is established by which any occupant is enabled to supervise the happenings at the common door in response to a call. The caller ascertains by means of the indicator lamp 11 whether the person called for is available, for that lamp does not glow unless the button 15 is pressed in the apartment called. The apartment occupant has at his hands means to satisfy himself when entry has been effected and if the lock has been automatically reset, and also has means provided whereby in the event of the call received being an accidental one or a mischievous one, the lock may be reset by pressing the restoring button 21.

What we claim as our invention and desire to secure by Letters Patent is 1. Electromagnetic control means for doors, comprising a spring backed hinged staple engageable by a latch bolt and-adapted when free to be swung aside to allow said latch end to pass it, a drop pawl adapted to take behind said staple to chock it, an electromagnet adapted for lifting said pawl to free said staple, a counterbalanced pendent armature with toe piece'adapted to engage and hold said pawl in its raised position, a resetting electromagnet adapted to pull off said pendent armature torelease said pawl, a contacting member on said staple adapted to strike said pendent armature in the relocking movement of said staple, and separate circuit closing contacts with spring resetting means for closing the circuits of said latch staple attachment, comprising a hinged staple, means including an anmature pawl for chocking said staple, means dependent upon the resetting movement of said staple for reengaging said pawl therewith, an electromagnet adapted to lift said pawl, a trip device adapted to engage and hold said pawl when lifted, an electromagnet adapted to disengage said trip device from said pawl, and manually closed switches in battery circuits through said magnets.

3. In a device of the character described, the combination with a pivotally mounted spring pressed staple adapted to cooperate with a door latch, of an electromagnetically controlled drop pawl adapted to normally hold said staple in locking position, tripping means for said pawl, electromagnetic means for actuating said tripping means, and a member on the staple for contacting with said tripping means.

4:. In a device of the character described, the combination with a pivotally mounted spring pressed staple adapted to cooperate with a door-latch, of an electromagnetically controlled drop pawl having a plurality of steps at one end thereof, one of said steps being adapted for engagement with said staple when the latter engages the door latch, a p'ivotally supported electromagnetically controlled lever having a toe piece for engaging another of said steps in the pawl to hold the latter out of engagement with the staple, and yieldable means carried by the staple to contact withsaid lever andm-ove said toe piece out of engagement with its step.

In testimony whereof we afiix our signatures.

NATHAN FIENBERG. WALTER LESLIE WAKEHAM.

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