US781272A

US781272A - Latch.

Info

Publication number: US781272A
Authority: US
Inventors: William H Dalrymple
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-04-20
Filing date: 1904-04-20
Publication date: 1905-01-31
Anticipated expiration: 1922-01-31

Description

No. 781,272. PATBNTBD JAN. s1, 1905.

- l W.v H. DALRYMPLB.

LATCH.

APPLICATION FILED APR. 20, 1904.

d3 j@ E, Y mmm. ljafijm/vz i Trofmfrs UNITED. STATES Patented January 31, `1905.

PATENT GEEICE.

LATCH.

SPECIFICATION forming-` part of Letters Patent No. 781,272, dated January 31, 1905.v Application filed April 20, 1904. Serial No. 203,986.

To all whom, t may concern:

. Be it known that-I, WILLIAM H. DALEYM-` PLE, a citizen of the United States, residing' at Branch ville, in the county'of Sussex and State of New Jersey, have invented certain new and useful Improvements in Door Latches, of

which the-following is a specification, such as will enable those skilled in the art to which it appertains to make and use the same. The object of this invention is to provide an improved door-latch designed particularly for use on the doors of cupboards, closets, wardrobes,`and the like, but which may also be usedn gates, hinged windows, and in any similar relations.

The invention is fully disclosed in the fol- 'lowing specification, of which the accompanying drawings form a part, in which the separate parts of my improvement are designated by suitable reference characters in each of thel views, in which- Figure' 1 is a horizontal section showing my improvement applied to a door as a case-latch; Fig. 2, an inside view of the latch removed from the door; Fig. 3, a view similarto Fig. 1, showing'my improvement applied as a mortise-latch; and Fig. 4, a'section on the line l iliof Fig. 3.

In the drawings forming part of this speci.s iication I have shown at c a part of a door. and at a part of the door-frame, and the frameb is provided in the usualmanner with aV recess b2 and face-plate 3.

In the practice of my invention as shown in Figs. 1 and 2 I provide a latch-case or casing c. which is open at one end and provided with a flange c2, whereby it may be secured to the door c. Within the case c is provided at c3 a .curved lever d, the shorter arm ofV which projects toward the closed end ofthe case c and the lever-arm of which is curved and extends diagonally of said casein the normal position of said lever and in the direction ofthe open end ofsaid case, as clearly shown in said ligure. the lever 0l, as shown at 62, lis a rod e, which passes loosely through the door c and is provided with a handle e2, and mounted on said rod between the door ct and the shorter arm of the lever c is a spiral spring f, which nor- Pivoted to the shorter arm of mally serves to hold the lever OZ and the rod e in the position shown in Fig. 1. Pivoted at g just within the open end of the'case c and near the outer closed side of said case is a dog L, having apnose 7b2, which normally projects from the open end of said case and the side of which opposite the pivotal point g of said dog is beveled, as shown at k3, and the side of which between the point of the nose and the 1 pivotal point g of the dog Ais also inclined, as shown at 7a4. The dog 7i is substantially triangular in form, and the longer and pointed r end thereof extends into the case c and is provided with a longitudinal slot L, through which passes a pin d3, secured to` the longer arm of the lever d, and the dog 7i is normally vheld in the position shown in Fig. 1 by the .spring f, which serves at all times to force the rod .c inwardly. The operation of this form of construction lwill be readily understood from the foregoing description when taken in connection with the accompanying drawings and the following statement thereof. rAs shown in Fig. 1, the door is closed and is held in the closed position by the dog 7L, the

Anose of whichprojects into the recess b2 in the frame In this position of the parts all that is necessary to open the door is to pull on the handle c2 of-the rod e, which operation will throw the longer arm of the lever Z outwardly and draw the nose 71,2 of the dog /Lv within the case c, and the door will be free to swing on vits hinges. In closing the door the operation of the dog /L is automatic, as will be readilyl cess c', and in this form of construction I provide two plates j, which are secured to the face of the door and .each of which carries a supplemental plate jfwhich extends parallel into the recess c', and a face-plate c is placed over the plates j and secured to the door and serves to hold the plates j in position. In this form of construction the lever Z is pivoted IOO between the inner ends of the plates 7"2, as shown at m, and the dog /L is the same as in the construction shown in Figs. l and 2 and connected with the longer arm ofthe lever Z in the same manner, .and the operation will be the same as with the construction shown in said Figs. l and 2.

In the construction shown in Figs. l and 2 the rod c is provided at its inner end with head a, by means of which connection is made with the shorter end of the lever CZ, and the rod c, as shown in Fig. 3, is similarly provided; but in Fig. 3 the door is provided on the inner' side with a large opening 0, through which the head a of the rod e is passed, and the spring f, employed in the construction shown in Fig. 3, is held in place by means of the head a of the rod e and an escutcheonplate p, secured to the door.

It will be understood that the plates j and f2 in the construction shown in Figs. 3 and 4 form a casing, support, or holder for the operative parts of the latch` and any suitable form of device or devices which can be secured in the mortised recess z' may be substituted for said parts without departing from the spirit of my invention or sacrificing its advantages.

With both forms of construction shown all that is necessary to open the door is to pull on the knob or handle e2 of the rod e and the dog z, will automatically operate when the door is closed, and it will be apparent that my improved latch, as herein shown and described, ean be operated so as to open the door only from the inner side thereof.

Having fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-d 1. In a latch for doors, a curved lever, a rod connected with the shorter end of said lever and extending inwardly through thedoor, a spring adapted to force said end of said lever outwardly and a triangular dog pivotally supported adjacent to the face of the door and the nose of which normally projects therefrom, said nose being beveled at both its outer and its inner edges, the nose of thc dog being also at the wider end thcrebf, and the other end of said dog being extended in the direction of said rod and provided with a longitudinal slot, and a pin connected with the longer end of said lever and passed through said slot, substantially as shown and described.

2. A case-latch for doors, comprising a case adapted to be secured to the outside of the door and the end of which adjacent to the face of the door is open, a curved lever pivoted in said case and ranging diagonally thereof, a rod pivoted to the inner and shorter end of said lever and passing inwardly through the door, a spring for forcing the shorter end of said lever outwardly` a triangular dog pivoted within the open end of said case and the nose of which projects normally therefrom, the nose of said dog being at the wider end thereof and being beveled at both its inner and outer edges, the narrower end of said dog` being projected in the direction of said rod and provided with a longitudinal slot, and a pin connected with the longer end of said lever and movable in said slot. substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of the subscribing witnesses, this 19th day of April, 1904.

WILLIAM I-I. DALRYMPLE.

Witnesses:

F. A. STEWART, C. J. KLEIN.