Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.


  1. Advanced Patent Search
Publication numberUS2436628 A
Publication typeGrant
Publication dateFeb 24, 1948
Filing dateJun 11, 1945
Priority dateJun 19, 1944
Publication numberUS 2436628 A, US 2436628A, US-A-2436628, US2436628 A, US2436628A
InventorsErnest Bratschi
Original AssigneeL B Fabrication De Serrures De
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Safety lock
US 2436628 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Eelo.24,1948. 'EBRATSCW 2,436,628

SAFETY LOCK Filed June 11, 1945 Patented Feb. 24, 1948 SAFETY LOCK Ernest Bratschi, Geneva, Switzerland, assignor to L. B. Fabrication De Serrures De Surete S. A., Geneva, Switzerland, a Swiss firm Application June 11, 1945, Serial No. 598,826 In Switzerland June 19, 1944 1 Claim.

The object of the present invention is a safety lock comprising a bolt locking member made of a single piece presenting two abutments acting in opposite directions.

The drawing represents, by way of example, an embodiment of the invention.

Fig. 1 is an elevation view.

Fig. 2 is a section along II-II of Fig. 1.

Fig. 3 is a section along III-III of Fig. 1.

Figs. 4, 5, 6, 7 show the bolt locking member in side elevation, in front, in the opposite side elevation, and in plan.

Fig. 8 shows a detail in a larger scale.

In the drawing, I refers to the bolt of the lock, which is operated by the key bit or by a lug 2 of a rotary member actuated either by a key or by a knob 3, which key bit or lug engages with the teeth 4 and 5 correspondin to two locking positions of the bolt. The shank of the bolt comprises two parallel jaws 2|, 2|; the lower edge of each jaw is formed with the teeth 4 and 5, 4' and 5'; and the upper edge of each jaw is provided with three notches 9, 9. The bolt locking member, intended to prevent the bolt from getting out of one of its three positions without the key or the operating knob being rotated, is constituted of a single U-shaped piece 6 pivotally mounted between the jaws 2|, 2| of the bolt shank. The upper arm of the bolt locking member 6 carries at its end two abutments I and 8, one on each side, the vertical abutting faces I and 8' being directed one to the right and the other to the left, in order to cooperate, in each one of the three positions of the bolt and in both directions, with the notches 9, 9' of the bolt jaws 2|, 2|. The single abutting piece 6 is pivoted at ID on a gudgeon secured in the frame of the lock and passing through slots ll of the bolt and 8 engage under the action of a spring |2 into the notches 9, 9' of the jaws 2|, 2| corresponding to this position, and their vertical abutting faces abut, one on the fore wall of the notch 9 and the other on the rear wall of the notch 9, thus locking the bolt against any fraudulous or accidental motion which is not produced by the key bit or by the knob or key operated lug 2 acting on the teeth 4 and 5, 4' and 5' on the bolt jaws 2|, 2| and on the lower arm of the U-shaped piece 6.

What I claim is:

A safety lock comprising a slidable bolt having a shank formed with two parallel jaws, the lower edge of each jaw being formed with teeth adapted to be engaged by a key and the upper edge of each jaw being provided with a plurality of notches, a U-shaped bolt locking member pivotally mounted between said jaws so as to enable its lower arm to be disposed in the path of movement of the key, the, upper arm of said locking member having its free end formed with two abutments disposed one on each side thereof for spring-urged engagement with a pair of notches of the bolt jaws, said abutments having their abutting faces directed in opposite directions to respectively engage the fore wall of a. notch and the rear wall of the other notch of the pair.


REFERENCES CITED The following references are of record in the file of this patent:


Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1036156 *Feb 17, 1912Aug 20, 1912Joseph SinkovichLock.
US1730662 *Apr 9, 1928Oct 8, 1929Bronislaw KobusLock
FR608882A * Title not available
FR629583A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US5201200 *Jun 20, 1991Apr 13, 1993Peter HauberReadily reversible entry lock with double throw dead bolt and slam latch lock
US6698259May 24, 2001Mar 2, 2004Macmillan DanielDual action detent for tamper resistant lever lock mechanism
DE1189406B *Oct 26, 1962Mar 18, 1965Emil FruehlingRiegel- oder Riegelfallenschloss, dessen Riegel von der Tueraussenseite in eine andere Schliessstellung vorschliessbar ist als von der Tuerinnenseite
U.S. Classification70/355, 292/153, 70/107, 292/140
International ClassificationE05B59/00, E05B59/04
Cooperative ClassificationE05B59/00
European ClassificationE05B59/00