US1413830A - Door lock - Google Patents

Description

M. cum-3M.

DOOR LOCK.

APPLICATION FILED DEC-28.1918.

1,413,830. Pa n ed Apr. 25, 1922-.

IIIIIIIF NT. .9? 15C E 5 P fT-E MICHAEL CUDERA, orsoLIiicrEa eERMAny.

noon 1100K.

Sne ification Application filed December 28, 1918. Serial No. 268,760.

To all whom it may concern:

Be it known that I, MICHAEL CUDERA, a citizen of the German Republic, and resident of Solingen, Germany, have invented certain new and useful Improvements in Door Locks, of which the following is a specification,

This invention relates to an improved door lock having a sliding shaft and a trigger head pivoted thereon and normally locked but to be disengaged electrically, and its novelty consists in the fact that the trigger head is prevented from turning by the abutment pin of a pivotal catch, which latter is turnable on a pivot of said shaft and which can be retracted with its abutment pin to'release said trigger head by means of an electromagnet and held in said position by means of a spring until, when opening the door and thereby turning the trigger head, said shaft is pressed back and the catch, which is compelled-to participate in said backward movement, is freed from said spring, whereupon it passes freely over the latter during the following return movement of the trigger head to its initial position and again locks the latter therein by means of its abutment pin; the trigger head being provided with a shoulder which bears against the end of said shaft, said shoulder limiting the turning movement of the trigger during the opening of the door and preventing its being carried beyond the path of said abutment pin.

The accompanyin drawing shows the improved door lock: 1 is a front view of the same with removed cover; Fig. 2 is asection on the line zz of Fig. 1; Fi 3 shows part of Fig. 2 in a plan view.

'On the lock bottom a, a sliding shaft 5 is movably held by a bolt (Z. A spring 6, which is mounted on a pin f of the shaft 6 between the latter and the rear lock wall 9, tends to press the shaft and trigger 0 toward the locking plate It. The trigger 0 is pivoted to a pin a of the shaft 6 so as to be turnable toward the lock wall a, while it is pressed into its locking position by means of a spring 70. Furthermore, on a pin Z of the shaft 6 a pivotal catch on. is mounted, straddling the end of the shaft 6 and having a pin a mounted between its walls, said pin normally abutting the end of shaft 5 to hold catch min proper position to allow the shoulder c of trigger head 0 to contact with said pin 02, thus preventing trigger head 0 from turning in a direction to allow opening of the door. The

catch on is connected by a link 0' with a bolt 79, over which engages a plate 9, which is suspended so as to swing toward electromagnets 7 Upon the latter being excited, the plate 9 i in a direction to allow opening of the door.

As catch m is retracted, its forward edge passes the head of a spring t which snapping up in front of said catch holds it in trigger releasing position as shown in Fig. 3 in dotted lines. Thereupon, the door can be opened,- forcing the head of trigger c to turn over toward the lock wall a against the action of its spring is and issuingfrom the locking plate h but as far only as is necessary for opening the door. Thereby, also the shaft b is pushed back sufficiently to free catch m from the spring 16, while it is again adjusted to its original position by a spring 2, the electromagnets being then no longer excited. When closing the door, the head of trigger 0 is pressed backwards and, upon the door having been closed, again pressed intothe looking plate It by means of the spring 6, the abutment pin a coming then again in locking engagement with the trigger head by action of spring a as above described. From outside, the door can be opened by means of a lock key in such away that an arm a forming a pivotal knee-lever'and engaging ina recess to of theshaftb is correspondingly adji)isted by turning said key. (see arrow, F 1

on the pin f outside the lock casing. The electric disengagement of the trigger may be effected from any point or points where This can also be effected from inside the door by means of a knob '12, which is located an electric contact for the electromagnets'r can be provided.

What I claim, is In a door lock, in combination, a. sliding shaft having a trigger head pivoted thereon,

a pivot on said shaft, a pivotal catch turnable on said pivot, an abutment pin on saidcatch said pivotal catchin its retracted position, and a shoulder on said trigger head to bear against the end of said shaft, said shoulder my hand in the presence of two subscribing limiting the turning movement of the trigger Witnesses.

during the openin of the door and preventing its being carri e d-beyondthe path of said MICHAEL CUDERA' 5' abutment pin, substantially as and for the VltIlGSSGSZ purpose set forth. t V HASE NOLDEN,

In testimony whereof I have hereunto set CORNELIA HAMMES-FAHR.

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