US111693A

US111693A - Improvement in spring-bolts

Info

Publication number: US111693A
Authority: US
Publication date: 1871-02-07
Anticipated expiration: 1888-02-07

Description

Odnted @Grant @stent @Mitre WILLIAM E. SPARKS, CE NEW HAVEN, CONNECTICUT, ASSIGNCR TC SARGENT St CC., CF SAME PLACE.

Letters Patent No. 111,693, dated February 7, 1871. f

vIMPROVEMENT lNA SPRING-BOLTS.

The Schedule referred to in these Letters Patent and making part of the same.

thereon, to be a full, clear, and exact description ot the same, and which said drawing constitutes part of this speeih'cation, and represents in- Figure l, a side view;` Figure 2, an end view;

V Figure, a longitudinal central section; and in Y Figure 4, a sectional view, tc more fully illustrate.A

my invention. y

This invention relates to an impro-vement in that class of bolts commonly called spring-bolts or eupboard-latcl1es,that is, a latch-bolt witha beveled nose,

vcombined with a spring to throw the bolt from the ease, and a knob fixed to the bolt, by means of which it is drawn into-the case.

Heretofore these bolts have been .constructed with a knob extending through a slot in the case und fixed to the bolt, the base of the knob being ot' larger diameter than the width of the slot, and bearing upon the surface of the case to sustain the bolt in its position. This constant rubbing oi' the knob upon the oase soon disigures the surface of the case, a difficulty which, by my invention,'is entirely overcome.

'.lo more fully illustrate my improvement l show in fig. 4 a sectional view of bolt of common construction, in which it willbe observed that the knob A necessarily bears `upon the surface ofthe case B, `for,

if it didnot, as' the bolt was drawn back the bevel'of the nose would allow the bolt to drop, as denoted in broken lines; hence the entire support ot the bolt is dependent upon the base ofthe knob bearing upon the outside surface of the case.

My invention consists in- Constructing the bolt with theI two sides inclined inward, making the inside of the bolt narrower than the outside, and the bolt-opening in the case of the sanne form, whereby the bolt, in what-ever position, will take its bearing in the opening through the case.

C is the case, and may be of any of the usual forms of construction, and provided with the usual means -or securingto the door.

D, the bolt, is beveled in the usual. manner, but is formed with inclined sides, as seen infig. 2, making it narrower npon the lower or inside.

The bolt is provided with a spring, E, to force it forward, also in the usual manner. l 'lhrough a slot, a, in the case a knob,'F, is set into the bolt l), without any bearing surface upon the case, and, when the bolt is drawn in to its fullest extent, the widest portion still .rests in the opening through the' case, and, in consequence of the inclined sides ot' the opening, cannot fall from that/position, thus making the bolt'.selfsupportiug.

It desirable, the base ot' the knob may be enlarged so astocorer the slot in the case, and this without coming in Contact with the case.-

I claimas my invention- Inspring-bolts or latches, the bolt D', construct-ed with inwardly-inclined sides, and the ease with a eorresponding opening to form 'abearing forthe bolt, to support it in drawing or when drawn into the oase, substantially in the manner and for the purpose set forth.

witnesses: WILLIAM n. SPARKS.

J. H. SHU'MWAY, A. J. TIBBITS,