US1196394A - Burglar-alarm. - Google Patents

Description

R. A. PHlLP. BURGLAR ALARM.

' QVihwa mo APPLICQTlON FILED DEC. I3. 1913- Patented Aug. 29, 1916.

ROBERT A. PHILP, OF YORTLAND, OREGON.v

BURGLAR-ALARM.

To ZZZ whom it may concern: Be it known. that I, ROBERT A. PHILP, a CllllZEll of the United States, residing at Portland, in the county of Multnomah and State of Oregon, have invented certain new and useful Improvements in Burglar- Alarms; and I do hereby declare the fol owing 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 comprehends improvementsin burglar. alarms and relates more particularly to those which are especially adapted for usein conjunction with a door, the opening of the door causing the alarm to sound.

One of the objects of the invention is to provide a very simply constructed burglar alarm including a main supporting plate formed with a spring tongue, an alarm mechanism mounted on said plate and means for holding the plate against a. door so that an attempt toopen the door will result in actuating'ithe spring tongue to set the alarm mechr ism into operation.

Another object of the invention is to prode an alarm of this nature consisting of a minimum number of parts and so construct ed as to fold into a very compact form, when: by the practicability-and usefulness of the article is greatly enhanced since it may be packed in a very smallspace to facilitate transportation.

The invention also aims to generally improve alarms of this nature to render them more 'efiicient, reliable and commercially desirable.

With these and other objects in view as will become more apparent as the description proceeds, the invention consists in certain novel features of construction, combination and'arrangement of parts as will be hereinaftcrfinore fully described and claimed.

For a complete understanding of my invention reference is to be had to the following description and accompanying drawings, in which Figure 1 is a vertical sectional view, showing the alarm in operative position against a door, Fig. 2 is a top plan View of the burglar alarm, showing the spring tongue locked in operative position, Fig. 3 is a. fragmentary top plan View. showing the spring tongue in its normal inoperative po- Specification of Letters Patent.

rm-eriteuA g29,1916.

Application filed December 13, 1913. Serial No. 806,516.

sition, and Fig. l is a fragmentary view,

showing the tongue locked in an inoperative position. 1

Referring in detail to the drawings by numerals, 5 designates the body of the alarm which is formed of a single metal plate bent to provide a vertical standard 6, a base flange 7 and a bell supporting plate 8. The base 7- grojects from the lower end of the standar 6 at right angles thereto and the plate '8 extends, from the top of the central standard 6 inadirection opposite to the base 7 and also at right angles to said standard. The standard 6 of the body and the inner end of the supporting plate 8 are formed with a pair of longitudinal slits and the metal between said slits is bent to provide the spring tongue'9, the upper end of which is turned to form an arm" 10] The curved end of said tongue permitting-the same to slide upwardly on the do-or' 'and avoiding the possibilityofthe ton i'e 'beinghe'ld in an"'ino1")erat-ive-position ue to the biting ofthe end thereof into the wood of the door.

A bell" "11, having a push rod 12 formed with a button 13, is mounted upon the top of the supporting plate 8 and is so construct ed as to sound when t le rod 12 is pushed inwardly and continue tosound as long as the rod is held in this position and the spring of the bellfiis under tension. is sprung so that it normslly reposes in the positionshown in Fig. 1, andit wi l be noted that when it is in this position, it

.means of the screw .15 and the short arm 16 of the lever forms a hook having the straight face 19 which intersects the curved face at an angle. A contractile helical spring 20 is secured at one end to the long arm of the lever 14 and atits other end to the supporting plate 8 in such a manner as to throw the hooked arm of the lever against the tongue 9. An angular catch 21 is carried by the tongue 9 and the free extremity of this catch is normally engaged by the curved face 18 of the arm 16.

A brace 22 is pivotally connected at its upper end to the standard at the juncture of the supporting plate 8 and has its lower edge provided with a plurality of floor engaging teeth The brace is connected shoulderJlT, the curved face l8 and the to the supporting plate 8 by a pair of angular arms 24 which engage trunnions 25 formed on the edges of the brace adjacent the upper end thereof. This construction permits the brace to swing parallel to the standard 6.

Supplemental to the foregoing description, it is desired to direct attention to the extreme simplicity of the device and the cheapness with which it may be manufactured. The body of the device, the tongue 9, catch 21 and arm 24 may all be formed by properlystamping and bending a flat metal blank. The plate 2- bell 11 and lever 14 c, which are the only other essential features of the device, may be quickly-connected to the body, as will be readily apparent.

Ila vingdescribed the construction of my alarm, it now remains to explain briefly the operation thereof: \Vhen the device is posi-- tioned as shown in Fig. 1, an inward movement of the door will cause the tongue 9 to be forced toward the bell and the arm 10 will engage the button 13 to force the rod 12 inwardly and release the bell mechanism. The catch '21 will ride over the curved face 18 of the hooked arm 15 and by engaging the shoulder lihold the arm 10 in operative. engagement wit'h't'he button 13, so that the hell will sound as long as the mechaiii sm remains under tension irrespective of whether or not the door is swung away from the tongue 9. If it is desired to use the de vice. merely as a door securer, the tongue 9 is sprung outwardly far enough to allow the extremity of the hooked arm 16 to engage the square face 26 of the catch '31 at \vhieh time the tongue is locked against movement toward the bell 11.

From the foregoing description taken in connection with the accompanying drawings, it will be seen that I have provided a very simple, practical and reliable burglar alarm which will sound when an attempt is made to open a door; \\'hich will continue to sound for some time even though the door he quickly closed; and which may be locked so as not to sound when a, door is opened, even though the device'be in operative position. 7

\Vhile I have shown and described the preferred embodiment of my invention, it

will be understood that minor changes in construction, combination and arrangement of parts may be made without departing from the scope and spirit of the invention as claimed.

Having thus described my invention. 1 claim 1. A combined burglar alarm and door stop comprising a base, a standard formed integrally with one end of the base and extending -.upwardl v therefrom, a supporting plate formed integrally with and extending outwardly from the upper edge of the standard, a spring tongue formed on the standard and sprung outwardly therefrom to partially overhang the base, an alarm mounted on .the supporting plate to be sounded upon the inward movement of the tongue and a brace pivoted to the supporting plate at the point of juncture with the standard, thereby transmitting any pressure on the standard directly against the brace.

2. A burglar alarm and door securer comprising a base, a standard extending upwardly from one edge of the base, the base being adapted to be positioned beneath the bottom of a door, a supporting plate at the upper end of the standard, and extending angularly therefrom in the direction opposite to the base, a spring tongue struck from the standard and bent outwardly in the direction of the base, a bent back arm at the upper end of the tongue and spaced inwardly therefrom for a-short distance, an audible alarm mounted,on the supporting plate, the alarm being sounded upon the inward movement of the arm into engagement therewith. the outer side of the tongue being positioned against the door beneat which the base is positioned and a brace pivotedto the supporting plate at the point of juncture with the standard whereby pressure transmitted to the standard by the inward movement of the door will be directly transmitted to the brace, thereby preventing the door from being opened, and simultaneously sounding the alarm.

In testimony whereof I atfix my signature in presence of two witnesses.

ROBERT A. PHILP. Witnesses:

R. E. MENEFEE, ANNA J. FERY.

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