US454449A

US454449A - Albert w

Info

Publication number: US454449A
Authority: US
Publication date: 1891-06-23
Anticipated expiration: 1908-06-23

Description

(No Model.)

A. W. BARTHOLOMEW.

KEY FASTENER.

No. 454,449. Patented June 23,1891.

UNITED STATES PATENT OFFICE.

ALBERT IV. BAR'lHOLOMEl/V, OF BOSTON, MASSACHUSETTS, ASSIGN OR TO THOMAS C. ASHLEY, OF SAME PLACE.

KEY-FASTENER.

SPECIFICATION forming part of Letters Patent No. 454,449, dated June 23, 1891. Application filed April 25, 1889. Renewed May 16, 1891. Serial No. 392,949. (No model.)

To aZZ whom it may concern.- that the key cannot be turned while the slide Be it known that I, ALBERT W. BARTHOLO- is in that position.

MEW, of Boston, in the county of Suffolk and Minor features of my invention will be set State of Massachusetts, have invented a new forth hereinafter.

5 and useful Improvement in Key-Locks, of In the drawings, a is a cupped or recessed which the following is a specification, referkey-hole escutcheon having the usual keyonce being had to the accompanying drawhole a and screw-holes of. This escutcheon ings, in whichmay of course be a casting, but is prefer- Figure 1 is a plan of the front side of a deably struck up out of sheet metal.

to vice embodying my invention in its preferred In the cup or recess a I mount a slide f,

form. Fig. 2 is a plan of the back side of having one or more bearing-surfaces a b at what is shown in Fig. 1. Fig. 3 is a sectional one end to engage a bearing-surface 7.; on the view on line 3 3 of Fig. 1; Fig. 4, a sectional key (see Figs. 6 and 9) when the bolt of the View 011 line 4 4. of Fig. 1. Fig. 5 is a plan look is shot and the key is in the lock. Slide 15 of the back side of the device shown in Figs. b is preferably held in this position by a 1 and 2, the key-locking slide being in posispring-pawl d, also mounted in the cup or re tion to cover the key-hole in the escutcheon. cess a (see Fig. 6) and adapted to engage Fig. 6 shows the device applied to a lock, the teeth 11 on one edge of slide 12. In this form key being locked in (the lock the bolt of which of my device slide b is provided with a finger- 20 is shot) by the key-locking slide shown in dotpiece 1, which projects through the key-hole ted lines. Figs. 7 and 8 show a modification, a, and spring-pawl d is also provided with a Fig. 8 being a section on line 8 8 of Fig. 7. finger-piece 2, which projects through an Fig. 9 shows a key, the shank of which is opening a in the escutcheon. The toothed formed with a flat bearing-surface. slide 1) and spring-pawl are the best means 2 5 The object of my invention is to produce a known to me for locking the key in its lock,

simple, neat, and strong device for locking and the construction set forth is the best at keys in looks, so that the keys cannot be present known to me as an embodiment of turned from the other side of the door; and my invention. The slide 1) slides against the my invention consists in the combination minor edges of the rim of the cupped escutcho hereinafter set forth. eon as it is moved from one position to an- One of the chief features of my construcother, and when in position to lock the key in tion the combination of a cupped or reits lock is kept from being tipped on the gassed key-hole escutcheon with a key-lockshank of the key as a fulcrum, and so pering mechanism mounted in the recess in the haps allow the key to be turned fro ith t 3 5 escutcheon. so as to protect and hide the keyby a pin 3, working in a slot 4, as shown.

locking mechanism. This isafeature of prac- In Fig. 7 the pin-and-slot arrangement is tical importance, adding to the durability and dispensed with and the slide 12 mounted beneatness of the device. Moreover, it enables tween one side rim of the es ut h d a me to produce a very economical device, the strip 5, secured in the recess in the escutch- 4o cupped or recessed escutcheons being readily eon, spring pawl d projecting across this formed f h t tal by dieing and dropstrip to engage the teeth in the edge of slide 0 ping, as will be plain to all skilled in the art. d, (see Fig. 7,) as in the preferred form of my The key-locking mechanism is also readily device shown in Figs. 1 to G, inclusive. formed of sheet metal and all the parts are The operation of my device is as follows:

45 assembled with rapidity. iVhen the slide 1) is in position to allow the A second feature of my construction is the passage of the key, (see Figs. 1 and 2,) the 5 combination of a key-hole escutoheon and a key is inserted and the lock-bolt Z shot. spring-pawl-controlled slide adapted when in Slide 12, is then moved to bring a bearing-surone position to engage the key and lock it, so face against a bearing-surface k on the key,

from the escutcheon, the pawl being mounted in the recess of the escutcheon and engaging the toothed slide, and the toothed slide being formed with a bearing-surface to engage the key, all substantially as and for the purpose set forth.

ALBERT WI BARTI-IOLOMEVV.

Witnesses:

EDWARD S. BEACH, H. C. YOUNG.