US1683854A - Combined door fastener and alarm - Google Patents

Description

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A. ZUKOR COMBINED DOOR FASTENER AND ALARM Filed Jul 16 13, 1927 mail I INVENTOR B 5 Patented Sept. 11, 1928.

iren STATES PATENT OFFICE.

ARNOLD Z UKOR, OF NEW YORK, N. Y,

Application filed June 13,

The present invention relates to improvements in combined door fasteners and alarms, and has for its main object to provide a simple device of this character consisting principally of two groups of elements, one of which is permanently attached to the door jamb and the other to the door proper and co-operating in a manner that a limited opening movement of the door is permitted and, when an unauthorized person endeavors to open the door, an alarm is sounded and further movement of the door prevented.

Another object of the invention is to so construct the device mentioned that it permits the door to. be partially opened from the inside to allow a person within the room to investigate'whether the person who sounded the alarm shall be permitted to enter.

A further object of the invention is to'so design the combined door fastener and alarm that it. can be used equally as well on a rightand on a left-hand door.

A still further object of the invention isv to provide a device of the character mentioned which is simple in construction, efficient in operation, durable in use and capable of manufacture on a commercial scale, or in other words one which is not so difficult to make as to bebeyond the reasonable cost of such a contrivance.

VVth these and other objects in view, which will more fully appear as the nature of the invention is better understood, the same consists in the combination, arrangement and construction of parts hereinafter described, pointed out in the appended claims and illustrated in the accompanying drawings, it being understood that many changes may be made in the size and proportion of the several partsand details of construction within the scope of the appended claims, without departing from the spirit or sacrificing any of the advantagesof the invention.

One of the many possible embodiments of the invention is illustrated in the accompanying drawings, in which 2- Figure 1 is a top plan View of a device constructed in accordance with the present invention applied to a door and door jamb, the latter two elements being shown in section; Fig. 2 is a front elevation of the improved device; Fig. 3 is a side elevation of the elements upon the door j amb; Fig. 4 is a front elevation of the elements on the F 1 of the drawings.

1927. Serial no. 193,449.

door; and Fig. 5 is a section taken on line 55 of Fig.3 7 i i In the drawings, the numeral 10 indicates one of the side posts of a door frame and the numeral 11 a door, hinged in the usual manner to the opposite side post of the door frame. A lock of any suitable construction, not shown, may be provided for securing the door both from the inside and from the outside.

For the purpose of securing the doorfrom the inside against forcible entry, a base member 12 is secured by screws 13, or otherwise to the'inner face of the door adjacent its free vertical edge, and on this base is mounted a horizontal pivot pin 14, engaging one end of a latch bolt 15, which is adapted to turn on said pivot through an arc of 180 in a. plane parallel to the inner face'of the door. This latch bolt is composed of two sections 16 and 17, united by a horizontal pivot pin 18. In the case illustrated in the drawings the outer end of the latch bolt section 16 is fork-shaped and the inner end of the latch bolt section I 17 is disposed between the branches of the fork, as clearly shown in The latchbolt section 17 is considerably shorter than the section 16, and the section 17 is adapted to be swung on the section 16 from the position shown in full lines in Fig. 4 of the drawings into the position shown in dotted lines in said figure, for a purpose hereinafter to be described. I The latch bolt co-operates with a bracke 19, which is attached, preferably, by screws 20, to the inner face of the side post 10 of the door and extends at right angles to the said face and consequently at right angles to the longitudinal axis of the latch bolt. This bracket is provided adjacent the door post with a ledge 21, onto which the sections. of the latch bolt may be swung, in which case the section 17 projects beyond the outer face 22.0f the bracket, as shown in Figs.

1 and 2 of the drawings. In alignment with the said ledge is formed in'the bracket a short longitudinal slot '23, of a size to accom modate the section 17 of the latch bolt. Against the outer face 22 of the bracket. abuts the base 24 of a rotary bell 25, containing a suitable mechanism, such as a hammer actuating device therefor, whereby, when the bell is released and allowed to be revolved by the usual spring, the bell is sounded. The bell base is attached to the racket, preferably, by screws 20. On the bell base is mounted a plunger trip 27, which,'when pressed toward the center of the bell, releases the mechanism and causes the bell to be sounded. This plunger trip is disposed in parallel relation to the bracket, its head 28 projecting beyond the outer end 29 of the slot 23, as shown in Fig. 3 of the drawings. In each face of the bracket 19 is provided a longitudinal recess 30, extending from the ledge21 to nearly the outer end 31 of the bracket and being of a size to accommodate the outer end of the section 16 of the bolt when the section 17 thereof is swung back into the position shown in dotted lines in Fig. 1 of the drawings.

Both faces of the bracket are recessed to permit the same to be used on right-hand doors and on left-hand doors, it being obvious that the latch bolt. is adapted to be swung 180 around the pivot pin 14, so that it may co-operate with the bracket both on right-hand and on left-hand doors.

The operation of the combined door fastener and alarm is as follows: When the device is not to be used, the latch bolt is swung 180 around the pivot pin 14 from the posit-ion shown in Fig. 2 of the drawings, so that itwill not co-operate with the bracket, thereby allowing the door to be opened and closed in the same manner as if the combined door fastener and alarm were not mounted on the door. vVhen the door is to be secured against forcible entry, the latch is shifted into the position shown in Figs. 1, 2 and 3 of the drawings, in which its free end rests on the ledge 21 of the bracket 19, the latch section 17 projecting beyond the bracket into alignment with the plunger trip 27. If the door is opened to a slight degree, the latch section 17 strikes against the plunger trip, whereby the bell is operated giving an alarm. At the same time the bell, or, if the latter should be removed by force from the bracket, the outer end 29 of the slot 28 forms a stop against which the latch section 17 abuts, thereby preventing the door from being further opened. If a person within the room, hearing the alarm, desires to ascertain whether the person who sounded the alarm should be admitted into the room, it is only necessary to'shift the latch section 17 around its pivot 18 into the position shown in dotted lines in F 1 of the drawings, whereby the door maybe opened until the outer end tion until the latch" is adapted to be swung 180 around its pivot pin letfrom the position shown 1n Figs. 1 and 2 of the drawings, whereby the door may be fully opened.

As pointed out above, the device is so designed that it can be used on a right hand or ona left-hand door. The only change that is to be made in the assembling of the bracket and bell. is that in one case the bell is to be mounted. on one face of the bracket and in the other case on. the opposite face thereof. What I claim is:

1. The combination with a door frame and a door hinged thereto, of a latch bolt pivoted to said door adj acent its free vertical edge, said latch bolt being composed of two pivotally connected sections, and a bracket fixed to said door frame having a longitudinal slot terminating adjacent the inner face of said door frame in a ledge on which the two sections of said latch bolt are adapted to rest, the outer one of said latch sections 7 being adapted to enter said slot whenthe door is partially opened, said bracket being furthermore provided with a longitudinal recess into which the outer end of the inner section of said latch bolt is adapted to enter when the outer section of said latch bolt is disengaged from said ledge, the outer end of said recess forming a stop against which the outer end of the inner latch bolt section is adapted to abut, thereby preventing further opening of the door.

2. A device according to claim 1, comprisinga bellmounted upon said bracket, and releasing means for said bell projecting into the path of said outer latch bolt section when the latter rests upon said ledge so that said bell is actuated when the door is being partially opened, said bell beingrendered inoperative when the outer section of said latch bolt is disengaged from said ledge but the door being secured against fullopening as long as the outer end of said inner latch bolt Section is disposed within said recess.

Signed at New York, in the county of New York, and State ofNew York, this 31st day of May, A. D. 1927. i

ARNOLD zuiron,

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