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Publication numberUS535915 A
Publication typeGrant
Publication dateMar 19, 1895
Publication numberUS 535915 A, US 535915A, US-A-535915, US535915 A, US535915A
InventorsAugust Lubbe
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Sliding-door lock
US 535915 A
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Description  (OCR text may contain errors)

(No Model.)


No. 535,915. 5 Patented Mar.19, 1895.





SPECIFICATION forming part of Letters Patent No. 535,915, dated March 19, 1895.

Application filed October 13, 1894. Serial No. 525,802. (No model.)

To aZZ whom it may concern.-

Be it known that we, AUGUST LUBBE, residing at Cambridge, in the county of Middlesex, and WILLIAM J. KEATING, residin g at Boston,

in the county of Sufli'olk, State of Massachusetts, citizens of the United States, have invented a new and useful Improvement in Looks for Sliding Doors, of which the following is a specification.

This invention relates to looks which are adapted to be placed upon sliding doors (often termed folding doors) for the purpose of locking them together; and it consists of a lock constructed somewhat on the Yale lock principle, and in the manner hereinafter described, and illustrated in the accompanying drawings, in which- Figure 1 represents a transverse vertical section of aportion of a couple of sliding doors provided with our improved lock, which is shown in longitudinal vertical section in position therein. Fig. 2 is a transverse vertical section of the lock taken on line 1 Fig. 1. Fig. 3 is an elevation of the striker or plate 2 5 on the door which is to receive the bolt. Fig.

4 is a horizontal section of the lock taken on line m, Fig. 2. Fig. 5 is a vertical section showing a modification.

Similar letters of reference indicate corresponding parts.

'- A and A represent two sliding doors which are to be locked together. The door A is provided with a suitable horizontal recess 13,

over the edge of which is screwed the striker 5 0 provided with the opening 0' having the extension or curved recess 0" on one side of its edge, as shown in Fig. 3. The door A is provided-with the lock, which comprises the main body or case D provided with, say, five pin-chambers E occupied by the driving pins 6 e operated by springs in the usual manner.

F is the cylinder provided with the pin holes H containing the pins h constructed as usual. I is the key. This cylinder has cut 5 upon its periphery a spiral groove K which makes one complete circuit of the cylinder. A screw L extends from the case D into said spiral groove. The cylinder is provided on its periphery next its inner end with an en 5o gaging pin P.

In operation, the key I is inserted and turned, with the efiect of rotating the cylinder. The screw L, by its engagement in the spiral groove K causes the cylinder, when it is rotated, to advanceinto the recessB in the door A. As it thus rotatively advances, the engaging pin P passes spirally through the extension or recess Oin theedge of the hole C. When the cylinder has sufficiently rotated, therefore, the driving pins E have locked it by dropping into the pin-holds H in the ordinary manner, and the cylinderwhich acts as a bolt-is locked in the recess by said pins and by the pin P, so that the doors A A are firmly locked together.

The two outer driving pins 6 do not act as looks when the cylinder has been turned into the door A, and hence are provided with shoulders e-so that they will not drop as do the pins 6, but can yield to the upward pressore of the corresponding pins in the cylinder as the key is inserted. Of course a reverse rotation of the cylinder withdraws it from the recess B in the door A.

It will be observed that in the invention as 5 above described the cylinder itself acts as a bolt and locks the doors together. In the modification shown in Fig. 5 the cylinder, when rotated, does not advance, being prevented from so doing by the pin S which lies in the groove S; but a supplemental bolt U is provided which is furnished with a screw U engaging a spiral groove V on the periphery of the cylinder. As the cylinder is rotated therefore, the bolt U is driven into the recess W in the door by the engagement of the groove V with the screw U.

Having thus fully described our invention, what we claim as new, and desire to secure by Letters Patent, iso 1. In a lock of the character described, the combination of the rotative cylinder F adapted to. be operated by means of a key asI and provided with the pin holes H, pins h and peripheral spiral groove K, the case D pro- 5 vided with the pin chambers E and driving pins e c said driving pins 6 being provided with shoulders e, and the engaging screw L extending from the case into said groove, all arranged and constructed substantially as and for the purpose set forth.

2. In a lock of the character described, in

combination, theeylinder F provided with ,the to be locked to that provided with the loci: spiral groove K and pin P, the casing or body itself, substantially as described.

0f the lock provided With the engaging screw AUGUST LUBBE.

L extending into said groove, and the striker WILLIAM J. KEATING. 0 provided with the opening 0' having the Vitnesses:

extension or recess 0, said striker being set HENRY W. WILLIAMS,

over the edge of a recess in the door which is E. A. WOODBURY.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4722204 *Mar 3, 1986Feb 2, 1988Best Lock CorporationSliding door lock
US4768360 *Jun 26, 1987Sep 6, 1988Best Lock CorporationLock for sliding doors or panels
Cooperative ClassificationE05B29/0026, Y10S70/19