US1578598A - Closure latch - Google Patents

Description

March 30 1926.

Patented Mar. 30, 1926.

cnA nNon .ernnny, or sAwrnnLn, .cALIronnrA.

se sa ter dkpplicationfiletl Apri1l4, 193s Serial No. 23,920.

To aZZ whom z'zfi-mag concern Be it known that I, Cneiinnon E. Grann a citizen of Canada, residing at 'Sawtelle, in the county 'of-Los Angeles and State o'f Galifori'iia, have invented certain new a-nduse ful Improvements in a Closure Latch, ofwhich the following is a specification. I

This invention relates to an improved latch I01 ClOSlll'QS the $211116 bein GS Jeciall I but 110i necessaril dQSl DGCl I'OI' USE ll 3011 doors, and particularly't-h ose types employed in houses. e I

hat I aimtodo is to provide a spring projected latch-bolt confined-within a casing, the casing being such as to permit it to be fitted into a mortise in the-door to conceal it.

In order that a completeunderstanding of the invention will be had it is deemed advisable to set forth the method of assembly of the improved structure. To this end it is to be stated that one method of assembly would be by inserting the unit comprising the parts 8, 9, 10 and 11, through the open end of the casing, after which the internal rib shown could'be depressed inwardly; or,-

the plunger 8 maybe inserted by itself, and then the rib pressed in andthe spring and head lO'placed in position.

The latch bolt itself is novel in that it isadjustable in length, and also for the reason that it is constructed to accommodate a commonly marketed knob which may be readily connected thereto to serve as a handle for opening the door, and also as a means for;

retracting the latch to unlock the door.

The particular details forming this novel structure will become apparent from the following description and drawings. 7

In the accompanying drawing forming a part of this application, and in which like numerals are employed to designate like parts throughout the same:

Figure 1 is a fragmentary elevation of a portion of a door and its frame showing the order to adaptthe door for the improved fastener, it is provided with a relatively small centrally located mortise and with an clongatedguide slot 5 opening through the inner face and into the mortise. Fitted snugly into this :mortise is an elongatet and relatively.smallcasing 6 having a slot '7 iii one sideregistering with the slot J 5. .iThe

outerzopen'end (if the casing is-fashionedin any appropriate waytotinish it elf and to provide a means for screwing or "otherwise fasteningit in place. Between its ends, the casingis formed'with an inwardly pressed annular channel TprOviding an internal stop rib. Mounted for sliding movement in I the casing is a spring projected plunger,

and the plunger preferably comprises a head 8 of a cross section corresponding to that of the'casing and a stem 9 extending from the center of the head. The free end of the stem is screw threaded, and is adapted to be screwed into-a screw threaded socket formed in the tongue 10. This permits the plunger to be shorted-within comparatively small limits so that the distance of projection of the tongue may be regulatedto some extent. Surrunding the stem 9 and interposed between the tongue and the rib 7 is a coil spring which serves to normally project the plunger outwardly. Particular emphasis is to be laid on the head 8 which is provided in one side with a screw threaded socket of a predetermined diameter." I

As before stated, the gist of the invention resides in the fact thatthe device is con finedwholly in the mortise to conceal it.

It is equally as important, if not more so to j however that the device is such as to accommodate a commonly marketed knob 12.

This knob is of conventional configuration, and in most circumstances is made of glass and carries a central bolt 13 screw threaded at its inner end. My device is important in that it permits this commonly marketed article to be bought and connected with the head 8 through the medium of the screw threaded socket with which it is provided. Sufficient adjustment may be made for the necessary clearance-between the knob and.

the surface of the door. In this way a h'an-dle'is providedfor opening and closing the door and also for retracting the tongue 10 from the keeper seat to unlock the door.

The advantages derived from a device embodying these novel characteristics are clearly apparent, and the details and construcllO i v may be resorted to.

Having thusdescribed the inventioni'what '-I claim as new is:

1. In a closure fastener of the class described v a casing and a spring pressed plunger slidable'in said casing, said plunger comprising a head provided with a central stein screw thread-ed at its free end, a tongue having a screw socket in its inner end into which said threads are tapped, and a coiled spring surrounding said stem and hearing against said tongue at one end, said casing being provided with-a stop with which the other end of the spring is engaged.

2. In a closure fastener of the class de scribed, an open ended plunger casing adapt mieases ed for reception in a mortised socket said casing being provided .in one sl de wlth a longitudinal gu de slot and being formed prising a head carrying a stem screw threadedat its free end, a bevel ended tongueprovided with a socket into which the screw threaded end of said stem is tapped, and a. coiled spring surrounding said stem, and

bearing at one end against the tongue and at its opposite end against said rib to yieldably hold said head in engagement with said rib when said plunger is projected, and said head being provided in one side with a screw threaded socket of a predetermined depth and 40 between its ends with an annular channelforming an internal rib, a spring pressed plunger located. in said caslng and comdiameter adapted for reception of a standardized knob-bolt.

ture.

CLARENCE E. IDNEY;

In testimony whereof I 'a liix my signa-

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