US1230774A - Latch. - Google Patents

Description

J. L. POLLOCK.

LATCH.

APPLICATION FILED OCT. 16, 1915.

1,230,774. I Patented June 19, 1917.-

wi/tnaoo Mr W 5/ lmflqfl 8% m I l 7% W M MW JOHN LOUIS POLLOCK, OF STERLING, ILLINOIS, ASSIGNOR OF ONE-THIRD TO NICHOLAS BAINONE AND ONE-THIRD TO ALBERT MILLER, OF STERLING, ILLINOIS.

LATCH.

Specification of Letters Patent.

Patented June 19, 1917.

Application filed October 16, 1915. Serial No. 56,167.

To all whom it may concern:

Be it known that I, JOHN LOUIS PoLLooK, a citizen of the United States, residing at Sterling, in the county. of Whiteside and State of Illinois, have invented certain new and useful Improvements in Latches, of which the following is a specification.

My invention has reference to latches, and

pertains more specially to that class thereof which are commonly known as night latches. In many instances the night latches are employed on doors which are in frequent use during the day-time, such as doors of stores and other public places, in which use it is desired to have the latch held permanently in an inoperative pos1- tion, means being employed for locking the latch from outward movement in the easing. In releasing the latch from such position this locking means is frequently operated by means of a small knob or thumbslide on the outside of the casing, and on the inside of the door, but in the ordinary use of the door there is danger of such knob being accidentally moved by the arm or clothing of a person passing through the door, causing a springing of the latch and accidental locking of the door, perhaps with the operator on the outside-thereof. The latch may also be released from its-locked position within the casing by children or other irresponsibles tampering with the thumb-piece.

One of the purposes of my invention is to provide a novel means for securing the latch in place in withdrawn position and effecting the release thereof, the releasing means being guarded against casual operation.

In the drawings: Figure 1 shows a latch embodying my invention, from the inner side of the latch casing. Fig. 2 is a similar view with some of the parts removed, showing the latch locking devices. Fig. 3 is an outer face view of a portion of the casing and projecting parts thereon. Fig. 4 is a side view of the barrel 18 in inverted position. Fig. 5 is a longitudinal section thereof.

1 represents a casing of usual form, provided with flanges 2 for attachment to a door, and 3 is a latch slidable in said casing and provided with arms 4: having on their ends lugs 5 adapted to be engaged by a cam 6 secured on a short spindle 7 rotatably outside of the casing with a rim 19.

mounted in the casing 1, and provided on its outer end with a knob or handle 8, by means of which said cam may be actuated. The only other means for operating said cam is by means of a latch-key insertible from without the door and suitable lock devices not herein shown.

The latch 3 is held normally in extended. position by means of a frame comprising a cross-bar9 perforated at its ends for a slidable mounting on a pair of pins 10, on which extensile coil springs 11 are interposed between the ends of the bar 9 and lugs 12 in the casing. A constant'pressure outwardly upon the bar 9 and latch 3 is thereby exerted at all times. At their outer ends the pins 10 are providedwith heads 13 which have free movement in the end of the casing 1, permitting a free lateral adjustment of the outer part of the frame and preventing the latch from binding against the edge of the casing.

The bar 9 is preferably connected with the latch 3 by means of a tongue 14 on such bar engaging a recess 15 in the outer face of the latch. (Shown in broken line.) The parts can thus be quickly assembled without the use of any special fastening means, and so as to operate in unison.

Fixed in the casing 1 is a plate 16 provided with a circular opening 17 in which is rigidly held a barrel 18 provided on the Extending through the barrel 18 is a slot 20 in which is held a pin 21, provided on its outer end with a button 22 encircled by the rim 19. The inner end of the slot 20 is central of the barrel 18 and the pin 21 is normally held in such inner end, with the button 22 held at a central point of the rim 19. In the plate 16 is a recess 23 in which is pivoted a lever 24, one end of which is adapted to engage a recess 25 in one of the arms 1 of the latch. vided with a recess 26 which accommodates the opposite end of the lever 24 and permits a free movement thereof. The engaging end of the lever 2 1 is curved and has a bearing against the pin 21, the pressure exerted thereon through the action of the spring 28 tending to hold said pin in its inner end of the slot 20.

Fixed to the plate 16 is a plate 29 provided with an opening 30 forming an extension of the opening 17 and receiving the end of the The barrel 18 is probe opened and closed without hindrance therefrom. If a person passing out through the door desires to release the latch, so that the same will operate this can be accomplished by pushing the button 22 outwardly or toward the edge of the door, with the finger or thumb. This cause-s the pin 21 to move outwardly in the slot 20, forcing the inner end ofthe lever 24: outwardly and the opposite end inwardly, releasing the arm 4: and permitting the return of the latch to its normal position.

The button 22 with its encircling rim has the appearance of an ordinary push-button and attempts would undoubtedly be made by those not informed as to the construction thereof to force the same inwardly, which cannot be accomplished, the real method of operation of such button being so thoroughly concealed as to rarely be detected by those not acquainted with the secret. It will be apparent, also, that the button is thoroughly protected by the surrounding rim so that there is no danger of the same being accidentally operated.

The arms 4 are provided with projecting pins 31 which come in contact with the cam 6 when such cam is in a neutral position, as in Fig.1, and limit the inward movement of the latch, so that no engagement of the lever 24 and recess 25 can take place. When the door is swung shut and the latch forced inwardly by coming in contact with a strike of usual construction no locking of the latch in inward position will result, but it will immediately return to outer position in its keeper. The locking of the latch in with drawn position can be accomplished only by operation of the spindle 7.

What I claim as my invention and desire to secure by Letters-Patent of the United States, is:

l. A device of the class described, comprising a casing adapted to be attached to a door; a latch slidable therein and held normally in extended position; means for'operating said latch; a barrel mounted in said casing and provided with a longitudinal slot and transverse recess; a spring-controlled lever adapted to engage saidlatch at one of its ends. and having its other end movable in said recess; a pin held in said slot in engagement with said lever and provided with a button on the outside of said casing, said pin being held normally at a central point in said barrel by said spring-controlled lever; and a guard-rim for said button on the outer face of the casing. i

2. In a device of the class named, a casing adapted to be attached to a door; a latch slidable therein and held normally in extended position; cam-operating devices capable of moving said latch inwardly; means for locking said latch in inward position; a slider-button on the outside of said casing operatively'connected with said locking devices to release the same; and stop members carried by said latch and adapted to engage the cam-operating devices when in a normal position, and prevent the locking of said latch in withdrawn position.

In testimony whereof I afiix my signature in presence of two witnesses.

JOHN LOUIS POLLOGK.

Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Batents,

' Washington, D. G.

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