US111567A - Improvement in latch-locks - Google Patents

Description

ittitali hm NICHOLAS PE-TR, NEW YORK, N. Y.

Letters Patent No. 111,567, dated February 7, 1871.

IMPROVEMENT IN LATCH-LOCKS.

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

Toall whom it may concern.'

Be it known that I, NIcHoLAs Pnrnr, of the city county, and State of New York, have invented certain new and useful Improvements in Latch-Locks; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings making a part of this specification, in which- Figure 1 represents a View oi theinterior of the lock, the backplate being removed to show the interior.

Figure 2 represents a longitudinal transverse section through the lock and plate.

Figure 3 represents the position ofthe several parts of the lock when the` bolt is thrown outA ot' action,

with the knob-shaft or itslevers, so as not to be moved by them. c

Figurel 4 represents, in perspective, the interior side of the back-plate, to show the studs or pivots thereon for guiding and directing some of the moving parts 0i' the lock, said studs, for cheapness, being cast on and with'said plate.

Similar letters of reference, where they occur in the several drawings, represent like partsof the lock in all of them.

This invention consists in the manner in which the bolt, its'hinged limb or member, spring, stops, and guides are connected, arranged, and operated by a pivoted lever from the exteriorof the lock, to throw out or let in the knob attachments, as may be required.

To enable others skilled in the art to make and use my invention, I will proceed to describe the same with reference to the drawings.

The lock-case A is cast with its flanges, studs, and openings on and in it, as is also the back-plate B, so that they will not onlyr drop together without ttngs, but also furnish guides, supports, and stops for the several interior moving or operative parts, of which there are but-tive, as follows The bolt C; its hinged limbA or member, D'; 'the lever E; the hub and its arms F, that are operated by the knob-shank or shaft; and the spring G.

The bolt is cast with van opening, a, in it, so that it may more past and be guided by a projecting piece, b, that is cast on and with the lock-oase A.

From the upper rear end of the opening a a recess, c, is made, that will, when the bolt isv thrown out of actionrwith the arms F, take in the permanent projecting piece b, and prevent the bolt from being moved in or out of the lock, or in other words, lock it.

There is also cast upon the bolt a recessed lng, e,

in va hole, in which'the pivot or stud d of the hinged limb D drops, andvwhereon it works.4

The spring G bears against this lug c, and the tendency of the spring is constantly to force'the bolt out of the lock-case and upward, to keep it in a posi tion to be caught and drawn in by the arm F, ope rated from without by the knob. v

The lever Fris pivoted by the stud j, cast on the inside of the plate B, which stud passes through the hole g cast in the lever.

This lever E is designed for moving the bolt C out of action with the turning arms F, as shown in tig. 3, and when so thrown out it is done against the resistance ot' the spring G, the reactionary power oi' which is constantly exerted to force it (the bolt) back into its working position and connect-ion, as seen' at ii 1.

gThe limb or member D is pivoted, as heretofore mentioned, to the bolt C at d, and this limb has cast in and with it a slot, j, into whicha stud, i, cast on the plate B, enters, and by which stud' said limb D is controlled when the bolt proper, of which it is really a part, is thrown out of or allowed to come into action, as explained.

The moving oi' the lbolt C out of action causes the 'limbDto also move out ofv action, its stud i serving as a stationary'fulcrum, upon which it swings.

When the lever E isA moved so as to allow the bolt to be returned into action by therecoil of the spring G, the limb D is also. swung upon itsl hinge at d, caused by the stationary stud t', to also swing into action with the arms F. f

h h are stops against which the rear end of the bolt aswell as of' its hinged limb D take to prevent the bolt from coming too far within the lock-.case

While I prefer the single spring G for accomplisln.l

ing the two movements of the bolt, viz., upward and outward, yet for the purpose of evading m y invention two springs' may be used, one to force the bolt lin one direction aud the other in the other' direction.

This Il should regard asan obvious change, but still a part ot' my invention. f

Having thus fully described' my invention,

What I claim therein as new, and desire to secu-re by Letters Patent, is-

In combination with the bolt `C and tripping-lever E, the hinged piece or limb D and its slot j and pin fi, and the spring Gr, moving on the inclinec, for the double purpose ofv allowing the bolt to be thrown and held out of and to be returned into action with thc arms F, the parts'being arranged to operate substantiallyas described.

N. PETR. lVitnesses WILLIAM WEBB, Pn'rma M. MORGAN.

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