US1174385A - Door-latch. - Google Patents

Description

S. W. BUTLER & E. WASSON.

DOOR LATCH; 1 APPLICATION mm MAR. 12, m5.

Pzitented' Mar.

6 1 1/ jnuc'ntm,

g /fiz/fler i I .Wasa a SAMUEL W. BUTLER AND ELLIOTT WASSON, 0F LOCK HAVEN, PENNSYLVANIA.

DOOR LA'ICH.

To all whom it may concern Be it known that'we, SAMUEL W. B T- LER and ELLIOTT VVASSON, citizens of the United States, residing at Lock Haven, in the county of Clinton, State of. Pennsylvania, have invented certain new an useful Improvements in Door-Latches; and we 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 a door latch.

An object of the invention resides in the provision of a latch which will automatically look when door is closed.

A further object of the invention resides in so constructing the latch that it will be operated as the door is opened from either the inside or outside by simply pushing upon the knobs.

lVith these and other objects in view, such as will appear as the description progresses, our invention comprises the combination and arrangement of parts as set forth in and falling within the scope of the appended claim. I

Referring to the drawing: Figure 1 is an elevational view-of our device with one of the cover plates removed, l oking from the side of the device which is to be secured to the door. Fig. 2 is a sectional view looking at the other side of the device. Fig. 3 is a sectional view taken in a. plane at right angles to the plane of Fig. 2 and showing the position of the operating rod and slide when the latch bolt is in its locking position. Fig. 1 is a similar view showing the latch bolt-drawn into the casing.

Referring to the drawing like parts are indicated by like characters throughout the several views.

In the embodiment of our invention shown in the drawing, we have provided a casing 1 which is of rectangular formation and has one side 2 removable. Mounted in this casing 1 is a slide 3 which operates between pins 4 at one end thereof, which pins are formed on the casing 1. A slot 5 is located in the other end stud 6, formed integrally with the casing 1, extends upwardly through the slot. The

slide is thus guided in its longitudinal move-,

ment in the casing. At one end of this slide a pair of upwardly extending guides 7 are provided, which are in spaced relation for Specification of Letters IPatent.

of the slide 3 and a Patented Mar. 7, 1916.

Application fi1ed March 17, 1915. Serial No. 15,026.

a purpose which will later appear. An elongated opening 8 is formed in the slide 3 adacent the guides 7 and in alinement with the space between the same. A latch bolt 9 which has the usual beveled end is mounted on the slide 3 and has a reduced neck 10 which is slidable between the guides 7. On

the end of this neck is across head 11 from which a projection 12 extends into the openlng 8. The contacting of the head 11 with the inner edges of the guides 7 limits the outward movement of the latch bolt and the projection 12 guides the latch bolt 9 together with the guides 7 in its movement relative to the slide 3,

In order that the slide 3 and the latch bolt 9 maybe normally pressed outwardly so that the beveled end of the latch bolt will extend through the edge of the casing, we have pivoted a pawl 13 to the casing 1, which pawl pro]ects into a recess 14 in the slide 3 and the free end of which bears against the projection 12 on the latch bolt 9. This pawl is actuated by a spring 15, which bears against it and against one edge of the casing 1. The movement of this pawl is limited by a stop 16 formed on the casing 1. The movement of the slide 3 is limited in one direction by the contacting of the inner end of the slide with the casing and in the other direction by the contacting of a pin'17 with one of the pins 4.

In order that the latch bolt 9 may be drawn inwardly against the tension of the spring 15, we have provided a cam 18 formed in a recess 19 in the slide 3, which cam extends into a cam groove 20 in an operating rod 21, which rod extends through the casing and is slidable transversely thereof. This rod is adapted to bev extended through the door and have the usual knobs secured to the ends thereof. The rod 21 is rectangular in cross section so that it will not be allowed to have rotative movement, but its only movement will be a sliding movement through the casing. Now as the knob on the inside of the door is pulled the latch bolt will be drawn'inwardly because of the fact that the slide 3 will be forced inwardly by the riding of the cam 18 in the groove 20. The operation of the rod 21 from the opposite side of the door will of course be reversedinasmuch as it will be necessary-to push the rod inwardly to cause the cam 18 to ride in the'groove. The door may then be opened by a. continued-push because of the fact that the latch bolt may have relative movement, ,as respects the' slide. This movement of the latch bolt allows the door to close easily since it is not necessary for the latch bolt to move the cam 18 in the groove 20, which would require considerable force and tend to prevent the latching of the door.

In order that the closing of the door may be facilitated, we have provided the keeper 23 with a roller 24: on which the beveled end of the latch bolt 9 rides.

It will be seen that we have provided a latch by means of which a door will be secured in its closed position, but which may be operated to allow the door to open by merely pushing or pulling upon the knobs.

l/Vhile we have illustrated and described a particular embodiment of our invention, we have merely done so for the sake of convenience and we do not wish to be limited to that particular embodiment as it is obvious that numerous changes may be made within the details of construction thereof without in any way departing from the spirit of the invention or exceeding the scope of the appended claim.

What we claim is 7 In a door latch, the combination with a casing, of a slide operable therein, said slide having a pair of spaced guides on one end thereof and an opening therein in alinement with the space between the guides, a latch 'bolt having an elongated neck slidably mounted between the said guides and a cross head arranged to engage the inner faces of the said guides, a projection extending from the cross head and into the said opening in the slide, and resilient means for maintaining the latch bolt and slide in such position that the cross head will engage the guides. In testimony whereof, we aflix our signatures, in the presence of two witnesses.

SAMUEL W. BUTLER. ELLIOTT VVASSON.

Witnesses:

J C. SMITH, J. JONES.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

- Washington, D. C.

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