US71350A - John wiard - Google Patents

Description

JOHN WIARD, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO HIMSELF AND THOMAS A CONKLIN, OF SAME PLACE.

Letters Patent No. 71,350, dated November 26, 1867. l

IMPROVEMENT IN KEY-GUARD ron noon-Locus.

digs some numb in in tljttt items not ant lllil'lililg iiltlfl at 1am.

TO ALL WHOM IT MAY CONCERN:

Be it known that I, JOHN WIARD, of New Brituin, county of Hartford, and, State of Gonnecticu tjhave invented certain new and useful Improvements in the Manufacture of Locks; and to enable others skilled 'in the art to make and use the same, I will proceed to describe by referring to the drawings,'in which the same letters indicate like parts in each of the figures; i

The nature of this invention will be understood from the specification and drawings. r The object desired to be attained thereby is to secure the key of a lock in a fixed position when the bolt thereof is turned forward, so as to prevent it (the key) from being turned or pushed'out of the look by burg- 1m implements inserted through the key-hole.

-It consists of a spring secured to the case, so that when the key is turned, with the bolt,toa given point,

it (the spring) will press the key into a depression formed in the opposite side of the lock-case, so that a person inside of a room may turn the belt of the lock in the usual way, unconscious of this feature of the lock which fastens the key, when the key will become fixed in said depression by the pressure of said spring, as a hindrance to burglars enterprise. In the accompanying drawingsi Figure 1 is an interior view of a portion of a lock, showing its mechanism partly in dotted lines.

Figure 2 is a cap or side of the lock-case removed, so as to show the interior thereof, A

a is the lock-case; b isthe face-plate; c is the look-bolt; d is the tumbler, whichundcrlies the bolt; 0 is a spring, secured to the case by means of a screw or pin, 2'; la is a depression (see fig. 2) in the cap or opposite side of the case, formed nearly opposite of the swell portion of the spring e, so that as the hit of the key 1: turns the bolts into the position as shown in fig- 1, the bit of the key will be, in position upon the swell of the'spring e, and be pressed thereby into the depression k formed in the opposite sidcor cap of the case. (See fig. 2.) i r i Now, should a person enter a room and look the door, upon which is arranged one of these, locks, and afterwards desire to open or-unlock the door, and the key should not readily act by the pressure of the fingers in the usual way, instinct, it is believed, would readiiy suggest the inward pressureof the key, which, with the turning pressure by the action of the hand, would at once cause the bolt to move back in the usual way. Thus a person may look the door upon the inside of a room, without fear of the lock being disturbed from the outside through the key-hole.

I believeIhav'e thus shown the nature, construction, and advantage of this invention in locks so as to enable others skilled to make and use the same therefrom. What I claim, therefore, and desire to secure by Letters Patent, is

- In the manufacture of locks, the employment of the spring a, depression k, in combination with the bolt 0,

tumbler d s bstantiall as and for the ur ose described. w r I u y p p JOHN WIARED. [1,. s.]

Witnesses:

N. 0. WILDER, JEREMY W. Buss.

Images