US1214148A - Door-latch. - Google Patents

Description

S. H. FORD.

DOOR LATCH.

APPLICATION FILED JUNE 3, 19l5.

1,214,148. Patented Jan. 30, 191?.

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SAMUEL H. FORD, 0F FLAT ROCK, ILLINOIS.

DOOR-LATCH.

Application filed .Tune 3, 1915.

To all whom 2'25 may concern.-

Be it known that I, SAMUEL H. FORD, a citizen of the United States, residing at Flat Rock, in the county of Crawford, State of Illinois, have invented certain new and useful Improvements in Door-Latches; and I do hereby 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.

This invention relates to door latches.

The object of the invention is the provision of a door latch embodying an improved construction whereby the latch is retracted by longitudinal movement of the knob arbor in the direction in which the door opens.

A further object of the invention is the provision of a door latch embodying an improved construction for locking the latch element against retraction.

With the above and other objects in view the invention consists in the details of construction and in the arrangement and combination of parts to be hereinafter more fully described and particularly pointed out in the appended claim.

In describing the invention in detail reference will be had to the accompanying drawings wherein like characters of reference denote corresponding parts in the several views, and in which Figure 1 is a vertical section through a fragment of a door showing the improved latch associated therewith; Fig. 2, a view similar to Fig. 1 showing the latch element locked against retraction; Fig. 3, a section on the line 33 of Fig. 1; Fig. 4, a section on the line 4.4 of Fig. 1, and Fig. 5, a perspective view of the key utilized to operate the locking means of the latch bolt.

Referring to the drawings 10 indicates a door in which is provided a recess 11 for the reception of the improved latch, the latter being indicated generally at A and being held in the recess 11 by means of a suitable face plate 12. The door 10 is provided within the limits of the recess 11 with alined openings 13, and alined openings 14; the pur pose of which will presently appear.

The improved latch comprises a casing 1d having one end open and a relatively thick wall 15 opposite the open end provided with a recess 16 which registers with the openings 13. Slidably mounted in the casing 14 is a Specification of Letters Patent.

Patented Jan. 31), 1917.

Serial No. 31,954.

latch bolt 17 having a longitudinal slot 18 therein. Secured in a suitable manner within the casing 14: and disposed in the slot 18 is a block 19. Also disposed in the slot 18 and having one end bearing against the forward end of the slot and its other end against the block 19 is a spring 20 which serves to normally hold the latch bolt 17 in projected position. This block 19 is provided with a longitudinal recess 21 opening through two sides thereof and a transverse passage 22 communicating with the recess 21. Rotatably mounted in the passage 22 is a member 23 having respective ends thereof provided with squared sockets 24: adapted to receive a key 25 for the purpose of effecting rotation of the member 23. Carried by and projecting laterally from the member 23 is a hook 26 adapted to move in the recess 21 when the member 23 is rotated. The rear end of the latch bolt 17 is provided with a longitudinal passage 27 the inner end of which communicates with the slot 18. Mounted in the latch bolt and eXtending across the passage 27 is a pin 28 over which the hook 26 is adapted to engage to positively secure the bolt 17 against retraction as clearly shown in Fig. 2. It will be obvious that the hook 26 can be moved to and from looking position by rotating the member 23 through the medium of the key 25. It will be noted that the passage 22 registers with the openings 1 1 in the door 10 whereby the key 25 can be conveniently inserted in either of the sockets 24 for the purpose of effecting rotation of the member 23.

The door knob arbor of the improved latch is indicated generally at B and is shown as comprising an intermediate tubular section 29 slidably mounted in the recess 16 and having threaded in each end thereof a solid terminal section 30. Each of the sections 30 have their outer ends squared as at 31 and slidably engaged in face plates 32 secured to opposite sides of the door 10 respectively. The intermediate section 29 of the knob arbor is provided with a longitudinal slot 33 and a pin 34: extends transversely through the bore of the section 29 within the limits of the slot 33. Secured on the outer end of each terminal section 30 is a knob 35 having a. tubular stem 36 and surrounding each section 30 is a spiral spring 37 one end of which bears against the adjacent face plate 32 and the other end against the inner wall of the related tubular stem 36.

Mounted in the latch bolt 17 and extending across the passage 27 is a pin 38. The latch bolt 17 is operatively connected with the arbor B by means of a link 39 having a longitudinal slot 40 therein in Which the pins. 34 and 38' are engaged.

By this construction it Will be apparent that When the arbor B is forced longitudinally t0 theleft in Fig. 3 it Will act through the link 39 to flect the necessary retraction of the bolt 17; When the operating force is removed fromrthe arbor the springs 37 and the spring 20 will automatically operate to return the various parts to their normal position.

What is claimed is 2- A door latch comprising a casing, a normally projected latch bolt mounted in the casing, aknob arbor slidably mounted in the casing and having a longitudinal slot therein, a pin mounted in the arbor and extending through the slot, a link provided With a longitudinal slot through which the pin extends, said latch bolt being provided With a SAMUEL H. FORD.

' Witnesses:

CECIL DUNCAN, CHAS. PLEUR.

COPIQIQ! this patent may be 'obtalnedtor flve cents each, by addressi'ngthe Commissioner of Patents,

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