US534716A

US534716A - Gendorf

Info

Publication number: US534716A
Authority: US
Publication date: 1895-02-26
Anticipated expiration: 1912-02-26

Description

(No Model.)

W. C. HILLGENDORF.

SEGURER. V 10.534,1716. l Paten-mnh. 26, '1895.

' Zyl e u Vy/M i UNITED STATES PATENT OFFICE.

WILHELM CARL HILLGENDORF, OF HAMBURG, GERMANY, AASSIGNOR TO BEENCK & RIEDELL AND JOHANN MARTIN CARL MAX HARTWIG, OF

SAME PLACE.

Doon-SECURER.

SPECIFICATION forming part of Letters Patent No. 534,716, dated February 26, 1895. Appncttion tutti November 5, 1894. senti No. 527,891. (No man.) Patented in Germany April 26, 18931N 74,853-

.Toall whom t may concern:

Be it known that 4I, WILHELM CARL HILL- GENDORF, a subject of the German Emperor, and a resident of Hamburg, in the German Empire, have invented certain new and useful Improvements in Automatic Door-Securers, (for which I have obtained a Vpatent in Germany, No. 74,853, dated April 26, 1393,) of which the following is a specification.

My invention has relation to that class of door checks whereby a door may be partially opened but not sufficiently to admit of the passage of a person.

.'Ihe invention has for its object the provlslon of means whereby the construction of this class of devices is not only simplified, but whereby the tampering with the door check from without is more eectually prevented and the disengaging of the locking devices of the check from within facilitated, as

, will now befully described, reference being hadto the accompanying drawings, in which- Figure 1 is a face view of the door check, the door being closed, and Figs. 2 and 3 are horizontal sections through parts of a door frame or jamb, and a door through the door check, Fig. 2 illustrating the operative devices of the check in the position they occupy when the door is closed, and in dotted lines the position they occupy when said door is opened to the full extent permitted bythe check, while Fig. 3 shows said operative devlees in the position they occupy on opening the door when said devices are not intended to operate as a check.

In the above iigures of the drawings ct indicates the door, to which is secured by means of screws the check latch plate e, from the forward end of which projects the check latch e terminating at its outer end in a cross or T-head, said check latch, as shown in Figs. 2 and 3 curving upwardly and forwardly from its plate so as to leave a certain space between its head and the door et, or the door frame or jamb b. To the latter is secured the locking device, which consists of a hasp constructed in the form of a bell-crank lever, fulcrumed at d in ears formed on a bracket c, secured to the door frame by means of screws. The

short arm d2 of the hasp terminates preferably in a cross head d4 that serves as an abutment or bearing for the T-head of the check latch e, when the door is closed, as shown in Figs. 1 and 2. The long arm d3 of the bell cranklever is slotted longitudinally, as shown at d6, the inner end of the slot being suitably enlarged to admit of thepassage therethrough of the T-head of the check latch, as shown at d7, and said longer slotted arm of the lever constitutes the rcheck hasp. From the inner end of the narrower portion of the longitudinal slot (Z7 of the hasp d3 project downwardly curved tongues d5 one on each side of said slot, the outer ends of said tongues lying on opposite sides of the check latch immediately behind its T-head so that on opening the door, the latch will ride over the tongues, and is thereby guided into the enlarged portion d7 of the slot d and thence into the more contracted portion, so that said door can be opened until the T-head of the latch reaches the outer end of the hasp slot, as. shown in dotted lines in Fig. 2.

In practice I prefer to employ a stop f proximate to the lever fulcrum for the purpose of limiting fthe movement of said lever toward the door frame, as shown in Fig. 2.

It is obvious that by the means described it is impossible to disengage the check latch from its hasp or keeper from'without the door when the latter is partially open without applying destructive force, the parts resuming their normal position when the door is shut again. If it is desired to admit passage through the door, the person within the room simply swings the check hasp toward the door frame, having previously manipulated the door latch so that the door will open under` the action of the short arm d2 of the check latch, as shown in Fig. 3. l

If it is desired to maintain the check out of operation the pin f is withdrawn and the hasp swung back into the position shown in dotted lines in Fig. 3, when the pin is again inserted in its bearings in the bracket c and between the long and short arms of the hasp. It is obvious therefore, that the operation of the check is controlled by the movements of the check latch, While the free movements of the door are dependent upon the movements of the check hasp.

Having thus described my invention, what I claim as neW therein, and desire to secure by Letters Patent, is

l. In a door check, a bell crank lever to be fulcrumed to a door frame and having arms of unequal length, in combination With a check latch to be rigidly secured to a door, said latch adapted when moved in one direction to interlock with and slide along the longer arm of and turn the lever in said direction, and When moved in a reverse direction to slide along and release said longer arm and act upon the shorter arm of such lever myinvention I have signed my name, in presence of two Witnesses, this 22d day of October, 1894.

WILHELM CARL IHLLGENDORF. Witnesses:

DIEDRIGH PETERSEN, HARRY F. W. GRETHS.