US353196A

US353196A - Feedeeick james biggs

Info

Publication number: US353196A
Authority: US
Publication date: 1886-11-23
Anticipated expiration: 1903-11-23

Description

(No Model.)

15'. J. BIGG-S.

MORTISE LOOK.

No. 353,196. Patented Nov. 23, 1886 INVENTOR: WITNESSES.

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UNITED STATES PATENT- OFFICE. I

FREDERICK J AMES BIGGS, OF l j ONDQN, ENGLAND.

. MORTIS-E-LOCK.

SPECIFICATION forming part of Letters Patent No. 353,196, dated November 23, 1886.

Application filed October 6, 1885. Serial No. 179,096. (No model.)

To all whom it may concern:

Be it known that I, FREDERICK JAMES BIGGS, a subject of the Queen of Great Britain, and a resident of London, England, have invented certain Improvements in Mortise- Locks, of which the following is a specification.

My invention relates to that class of mortiselocks which have cylindrical cases. adapted to be inserted in a hole bored with a bit or anger;

' that there has not been sufficient vertical space to provide for the proper rise and fall of the tumblers, nor to admit of the locking-plate and tumblers being made suifieiently wide to permit of the proper cutting out of the space in which the key moves, thereby rendering the wards of the key so small that there is difficulty in providing sufficient variety in the wards of different keys to afford adequate security. In order to provide more space, and thereby reduce these disadvantages, I make the lock with a cylindrical casing, having the chamber for the locking mechanism extending entirely through it in vertical direction, and in order to close the open top and bottom of this chamber I slip over the frame a cup-shaped sheath of thin drawn tubing having a closedrear end. This drawn tubing gives a desirable finish to the lock-case, and is so much thinner than a cast-metal casing that a considerable economy of space is effected.

1n the drawings, which serve to illustrate my'invention, Figure 1 is a side elevation of the exterior sheath of the lock detached, and Fig. 2 is a transverse section of the same, taken in the plane indicated by line 2 2 in Fig. 1. Fig. 3 is a side elevation of the lock complete, and Fig. 4 is a rear elevation of same. Fig. 5 is a similar view to Fig. 3, but showing the exterior tubular sheath in longitudinal section. Fig. 6 is a transverse section on line 6 6 of Fig. 5. Fig. 7 is a plan view of the lockwith the tubular sheath removed.

I construct the inner frame of the lock which contains the locking mechanism in two parts, one of which is permanently attached to the face-plate. This frame is made of cast metal, and its two sections are secured together by a screw. Over this frame I slip the cupshaped inclosingsheath, made of thin drawn tubing closed at its rear end in the drawing process.

Inthe drawings, a is the exterior tubular sheathflnade from thin drawn metal tubing of cylindrical form and closed at its end b.

e 6 represent the two sections of the lockframe, one of which is permanently attached to the face-plate f, and the two are secured together by a screw, Z. The frame 6 e has a chamber formed in it extending diametrically through it from top to bottom, in which chamber are placed the tumblers or levers k k and the latch-plate or lock-plate k. The plate It is flush with the top and bottom of the frame e 6, while the tumblers k it have play for the full height of the frame. When the frame 6 e,

containing the locking mechanism, is inserted in the sheath a, the open end of the latter abuts against the face-plate f, and at the other end it is secured to the frame'by a screw, which passes through its closed end b, and screws into the inner end, h, of one of the sections of the frame.

The sheath a, being very thin, forms a com-,

plete housing for the mechanism and frame, and at the same time occupies no appreciable room, which is a great desideratum, and as the vertical chamber for the locking mechanism extends entirely through the'frame e e the entire vertical width of the bored socket or mortise is rendered available for the play of the lock mechanism, except the insignificant space occupied by the thickness of the sheath.

In the sheath is formed the keyhole c, and in the frame e e is formed the key-hole d, the two coinciding when the sheath is in place on the frame; and in order that these key-holes maybe readily brought into their proper relative positions and maintained there, I provide the frame e 6 with a stud, t, which engages a hole in the closed end b of the sheath when the sheath is properly in place.

The key-hole is made horizontal, instead of vertical, as usual, and is placed as low as is practicable in order to enlarge the space in the locking-plate and tumblers and enable the wards of the key to be made longer. The key-hole is made doublethat is, with a wing for the wards on each side of the eye for the key-stem. The key is inserted horizontally with its wards in one wing, is turned a half-revolution in order to lock or unlock the bolt, and then reaches the opposite position,where it may be withdrawn, its wards passing out through the opposite wing. Myinvention' is not, however, confined to this construction and arrangement of key-hole.

My invention is applicable to mortise-locks of all descriptions, whether latch-locks, such as that shown (and which may have a sphericalended latch, as represented, or one of another form,) or dead looks, or two-bolt locksthat is to say a lock with both a latch and a:

bolt.

I am aware that tubular mortise-locks are old, and that the mechanisms ofsuch locks have been inclosed in thick tubular openended casings. This I do not claim; but

What I do claim is 1. A mortise-lock consisting of'a cylindrical frame formed with a chamber for the-lock mechber, and a face-plate fixed to said frame, in combination with an exterior sheath, a, of thin drawn tubing, having a closed end, b, fitting over said frame, and a fastening-screw, g, passing through the end I) and engaging said frame, whereby the sheath is secured to the lock, substantially as set forth.

2. A mortise-lock consisting of a cylindrical frame formed with achamber forthelock mechanism extending entirely through it, a latch or bolt and tumbler arranged to work in said chamber, a face-plate fixed to said frame, and a projection, 2', at the rear end of said frame, in combination with an external sheath, a, of thin drawn tubing having a closed end, b, and having also a hole therein to receive said projection and prevent the sheath from turning, substantially as set forth.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

F. J. BIGGS.

Witnesses:

J os EPH PASPELD, JOHN WM. \VILLIAMS.