US316574A

US316574A - Door-lock

Info

Publication number: US316574A
Authority: US
Publication date: 1885-04-28
Anticipated expiration: 1902-04-28

Description

(No Model.) R. G. ROLAND.

DOOR LOOK.

PatentedApr. 28, 1885.

Rm m ih ATTO NBY- Warren STATES ROBERT G. ROLAND, OF BEECH GROVE, KENTUCKY.

DOOR-LOCK.

SPECIFICATION forming part of Letters Patent No. 316,574, dated April 23 18815.

(No model.)

To all whom, it may concern:

Be it known that I, ROBERT G. ROLAND, a citizen of the United States, residing at Beech Grove, in the county of McLean and State of Kentucky, have invented certain new and useful Improvements in Door'Locks; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the'accompanying drawings,.and tothe letters and figures of reference marked thereon, which form a part of this specification.

My invention relates to door-locks; and the novelty consists in the construction, arrangement, and adaptation of parts, as willbe more fully hereinafter set forth, and specifically pointed out in the claims.

The essential object of the invention is to provide a lock and a peculiar key therefor which shall be inexpensive of construction, simple in operation, not liable to get out of order, and which shall be eflicientin preventing evil-disposed persons from tampering with the bolt.

To these ends it consists, essentially, in a body in a recess of which is housed a single bolt. This bolt has two recesses, in which the end of a single spring operates to lock the bolt either in a projected position into engagement with the keeper or in its withdrawn position within the lock. The key is cylindrical and carries a pivoted arm which operates the bolt. The arm is pressed within the shank of the key when the key is inserted into the lock, and a spring operates to throw the arm outward. The back plate of the lock has a slot through which the key-arm passes, and as the key is partly withdrawn this key-arm falls into position to operate the bolt and the boltspring. Spring-shields pivoted upon the outer face of the back plate serve to close the keyhole, except when they are forced apart by the sharpened point of the key, and ahook serves to lock these together when it is desired to lock the door upon the inside. When it is desired to remove the key, the said key is forced inward until the arm passes entirely through the back plate, when a quarter-turn of the key will bring the said arm against a lug or guard and within the plane of the key, and the key may be readily withdrawn.

The invention is illustrated in the accompanying drawings, which form a part of this specification, and in whichi Figure 1 is a cross-section of the look through the line :0 m, Fig. 2. Fig. 2 is a plan view thereof with the back plate removed. Fig. 3 is a back plan View with the'back plate in posit-ion. Fig. 4c is a detail view of the key, and Fig. 5 a detail view of the key-clos ing guard.

Referring to the drawings, in which similar letters of reference indicate like parts in all the figures, A designates the body of the lock, to which is secured a back plate, B, and between which is formed and located the springreeess a and the boltway a. One end of the spring 0 has a bearing in slit a of the body,

and the opposite end, 0, operates in a recess,

(1, of the bolt D to lock the said bolt into e11- gagement with the keeper, (not shown,) or into the recess d, to lock said bolt in its withdrawn position.

The key-hole of the lock is designated by the letter a, and it is continuous through the body and back plate, B.

Pivoted to the outer face of the back plate, B, is a pair of guards, F, a spring,f, operating to hold them together with their contiguous edges over the plane of the key-hole, and a slot, b, in the plate B extends upon either side of the keyhole in that portion.

K designates the shank of the key, which is circular in cross-section, and has a sharpened or conical point, it. In a longitudinal slot in the said shank is pivoted an arm, L, in such a manner as to present a long end, 1, and a short end, Z. A spring, M, is located within the slot and serves by its spring force to throw the longer end of the arm toward the pointof the key after said end has been pulled back preparatory to inserting the key in the lock. Upon the guards F are secured a hook, s, and an eye, 8, by means of which the said guards may be secured together, and this aetion,it will be observed,serv.es to lock the en'- tire device against the action of the key.

Upon one of the guards F contiguous to the end of the arm L in the direction of the pot-nt poses of this description will beassumedtobe. with the guards close together, but not locked,

with the bolt withdrawn, and with the longer of the key-shank. The operator pulls the longer end, I, of the arm L back against the action of the spring M and inserts the keyi nto the hole (1 forcing it entirely through the back plate, B. As soon as the arm L is clear of the back plate the action of the spring lyI' throws the longer end outward. The key :being then partially withdrawn said :arm bearsagainst 'theguards Fand is forced to :assume' a .position at rightangles to the :plane of the :key-shank-and parallel with the plane of the back plate. A slight oscillation of itheikey will then make the arm L register with the slot D, and :the key being furth-e-r withdrawn I the said-arm'drops into the chamber -a with the longer end lying intthe direction of the bolt {IQ-and the shorter end lying .in (the vdi- I rection of the spring 0. A-sithus conditioned, the key being turned in the proper-zdiiine'ction,

from the recess id of the bolt.

inward until the arm :L has passed beyond the back;plate,B, turn'the key untilthe-s'hort end, :Z, comes into contact with the lug z, =when .ai proper manipulation will bring the :arm L within the :plane of'the'ekey'andiit mayireadily be withdrawn.

I attach importance to the construction and operation of the keyinits.relationitothesin- .gle bolt-and single spring.

I I also attach importance to the guardsand their concomitant "parts, and to the lug z for withdrawing :the

a-nnwithin the body of the .:key.

Modificationsin details ofconstruction may be made without departing from the principle or sacrificing the advantages of my invention, the essential features of which will be readily understood from the foregoing description, taken in connection with the drawings.

"The lug 2 maybe formed with an inclined face, the contact of which with the arm Lwill TSBIVB illO force it within the slot of the key.

Having thus described theinvention, what I claim as new, and desire to secure by Letters Patentof the UnitedStates, is

1. The combination, with aloek-case, as described,and-with a bolt, D, having recesses d d and spring 0, of a key having a pivoted spring-actuated arm, L, ha-v-ing vasshortiend, .l, adapted to first unlock the spring from .the bolt, and:a longer end, IZ, adapted to operate the bolt by the same movement of the key, :as set forth. I

:2. 'The combination of thezboltandisprnim'g anditheguards 13, having spring fand lugz, wv-ith inclined face secured upon one :of said guards, with the :key ihaving conical point. and pivoted :and spring-actuated arm L, .as sand -for rthe purposes set forth. f3. 'The combina'tion, with the ibod y A, ing recesses a a"a the plate B, haviingssl'otsb, .the guards F, spring f, and lug z, the bolt 19.,

sandspniing O, oflthe keyhaving conical point an'dl-the pivoted and spring-actuated anmL, :as set forth.

4. The eom'binatiomwith alock-case having a cylindrical key-hole and a =SlOl],b,U :l1 fih'e ibackiplataofia key having.aslottedeylindrfical s'hanfk .and :api voted spring-actuated arm, EL, aa=bolt, ill-land spring (3, and a lug, z, :lyingadjacen't to the slot 1), itheiwhole adapted flso serve as and :for the-p urposes set forth.

Intestimony whereof I affix myrsignatuureiiin presence of two witnesses.

FRGJIBERT G. Witnesses: l

{GRAND-ELL, M. G. .AsrrBY.