US807096A - Burglar-alarm. - Google Patents

Description

' No. 807,096. PATENTED DEC. 12,1905.

K. STASTKA.

BURGLAR. ALARM.

APPLICATION FILED 11116.9. 1904.

' ammga.

UNITED STATES PATENT FFICE.

BURGLAR-ALARNI.

Specification of Letters Patent.

Patented. Dec. 1905- Application filed August 9, 1904. Serial No. 220,101.

To aZZ whom it may concern.-

alarms that are particularly adapted for windows and doors; and the object of this invention is to provide novel means whereby should a burglar enter a window or door an alarm will be sounded, which will signify that the window or door has been entered.

Another object of this invention is to provide novel means which will be suspended upon the interior of the window or door, whereby should a person enter said window or door they will contact with said means and cause an alarm to be sounded, and I have constructed my improved apparatus whereby the same may be readily applied to the ordinary windows and doors commonly used, the construction being such that the expense of manufacture will be reduced to a minimum and a strong and durable construction maintained.

. The invention finally resides in the novel construction, combination, and arrangement of parts that will be hereinafter more fully described, and then specifically pointed out in the appended claims.

Referring to the drawings accompanying this application, like numerals of reference indicate corresponding parts throughout the several views, in which Figure 1 is a front elevation of a portion of my improved burglar-alarm, showing the same attached to the interior of a window. Fig. 2 is a vertical sectional view of the same. Fig. 3 is a side elevation of a portion of the alarm used in connection with the apparatus shown in Fig. 1 of the drawings. Fig. 4 is a bottom plan view of the alarm and its appurtenant parts, as illustrated in Fig. 3 of the drawings. Fig. 5 is a vertical sectional view of a window-frame, showing amodified form of my improved alarm; and Fig. 6 is a front View of a door, showing my improved alarm attached thereto.

To carry my invention into effect, I have illustrated my improved alarm as being attached to a window and door, and I wish it to be understood'that the mechanism employed to sound an alarm may be readily constructed in connection with a plurality of windows and doors, whereby should either one be entered by a burglar an alarm will be sounded.

Reference will first be had to Figs. 1 and 2 of thedrawings, wherein I have illustrated an ordinary window- frame having sashes 1 and 2 mounted therein. Centrally of the window and upon the upper cross-frame 3 I secure an angle-iron 4, having a depending arm 5, and to this arm is pivoted, as indicated at 6, an L-shaped rod 7. To the rod 7 is connected in front of the upper and lower sash the frames 8 8, carrying cross-bars 9 9, these frames being constructed of a light material, or they may be made of a netting or any suitable material, whereby should a burglar break the glass or should he lower or raise either sash of the window-frame to entersaid window he will contact with these frames. The horizontal portion 10 of the L-shaped rod 7 contacts with a \J-shaped lever 11, which is pivoted to a pin 12, carried by the angle-iron 4, and the curved portion 14 of this lever engages a rope or cord 15, which is connected to thewall of the compartment carrying the window-frame, as designated at 16, the other end of said rope passing over a pulley 17, which is rotatably mounted in a bracket 18, carried by the wall of the compartment.

The alarm mechanism, as illustrated in Figs. 3 and 4, consists of a suitable board 19, this board being located in any suitable place in the compartment whereby if the alarm is sounded it will be heard, and the board is mounted in as convenient a place as possible,

so that the cord or rope 15 may be attached to the same. Mounted upon the base of the board 19 are the guide-yokes 2O 20, and slidably mounted in these guide-yokes is the U- shaped bar 21, which to its one end has connected a cord or rope 22, that passes over a loose pulley 23, mounted upon said board, this cord or rope 22 having a weight 24 attached to its lower end. Pivotally mounted, as designated at 25, is a three-pronged bell-crank lever, which includes a clapper-arm 26, that carries a clapper 27. The reference-numeral 28 designates another prong or arm of the bell-crank lever, this prong extending rearwardly and being bent outwardly, as indicated at 29. The bell-crank lever has another depending prong 30, which is normally adapted to engage one of the pins 31 31, carried by a wheel 32, that is rotatably mounted upon a IIO shaft33,this wheel having formed integral with its hub portion a drum 3 1, and wound around said drum is a rope or cord 35, having connected to its loose ends weights 36 36. The reference numeral 37 designates a spring which is secured to the board 19 and normally tends to throw the hammer against the bell, the upper arm of slide 21 forming an abutment for the hook 29 to hold the hammerarm 26 from being oscillated by pins 31. Secured to the upper edge of the board is a suitable bell 38, which is placed in such a position that when the bell-crank lever is moved the clapper 27 will strike said bell and sound an alarm.

The operation of the mechanism just de scribed is as follows: We will assume that a person has entered the window and has contacted with either one of the frames 8 8, at which time said frame will be swung outwardly in the direction of thearrow 39. (Shown in Fig. 2 of the drawings.) As either one of said frames is swung outwardly it carries with it the rod 7, and the horizontal portion 10 of said rod will be raised, permitting the lever 11 to swing upon its pivot and release the rope or cord 15. As this rope or cord is released the weight 24: will draw the bar 21 through the guide-yokes 2O 20, the rope 15 being attached to the outer end of said bar. As this bar is drawn along the board the end of the bar, as designated by the reference-numeral 10, is carried past the rearwardly-extending prong 28, and the withdrawing of this bar will in a manner form a clear path for the downward movement of the rearwardly-extending prong 28. When said bar 21 has assumed this position, the bell-crank lever will be rotated upon its pivot 25 by one of the weights 36 moving downwardly and through the medium of the drum 34 will rotate the wheel 32 and cause the pins 31 carried by said wheel to strike the depending prong of. the bell-crank lever, the rapid rotation of the wheel 32 causing each pin to engage the prong 30, actuating the bell-crank lever to sound a plurality of successive alarms. After each pin 31 has engaged the prong 30 it and the prongs 26 and 28 will be returned to their normal position by the spring 37. By making the drum 3 1 of a sufiicient diameter and providing the same with a considerable length of rope or cord 35 the alarm may be made to sound an alarm for quite a period of time or until the bar 21 is manipulated to place the end of said bar in the path of travel described by the rearwardly-extending prong 28.

In Fig. 5 of the drawings I have illustrated a modification wherein the mechanism comprising the pin 12 and the lever 11 are mounted under the upper cross-frame 3 of the windowframe, this construction being employed to permit the easy placing of shaderollers and curtains on the window-frame' Reference will now be had to Fig. 6 of the drawings, wherein I have illustrated a door having a plate-glass front, and upon the door is secured my improved burglar-alarm. In this instance the frames 8 8 are formed of an L-shaped rod 7 and cross-bars 9, said frame being pivotally mounted, as indicated at 6, to a plate 14, that is secured to the frame of the door, and to the plate 14: is pivoted a lever 11, which engages a rope 15, similar to the rope l5, heretofore described. Upon the glass being broken and the opening entered by a burglar the frame will be swung outwardly, similar to that heretofore described, and the rope 15 released to sound an alarm. Should the door be opened without breaking the glass, the lever 11 will be disengaged from the rod and permit the weight 24 to draw said bar 21 and rope into such a position that an alarm will be sounded.

While I have herein shown the frames as being rectangular and composed of ordinary cross-bars, it is obvious that these obstructions may be made of any desired ornamentation or configuration, and I do not care to limit myself to the specific mechanism shown, but may employ such mechanism whereby the same results will be obtained.

Having fully described my invention, what I claim, and desire to secure by Letters Patcut, is

1. The combination with a frame adapted to be pivotally suspended in front of a building-closure, said frame being formed with a projecting horizontal portion, of a swinging lever pivotally suspended from the windowframe and having a hooked end, said lever engaging the projecting portion of the frame a rope engaged bysaid hooked end, an alarm, a sliding bar connected to said rope and engaging the clapper of the alarm, a weight attached to said sliding bar and adapted to move the same out of engagement with the clapper of the alarm when said rope is released bythe hooked lever.

2. In a burglar-alarm the combination with a frame adapted to be pivotally suspended at its upper edge in front of an opening in the building, a hooked lever adapted to be pivotally suspended adjacent to said frame and engaged thereby, a cord fixed at one end and attached to a sliding bar at the other end, said 'cord being engaged by said hooked lever,

means for moving said sliding bar when the tension on said cord is released, an alarm mechanism, and means whereby when the cord is released and the sliding bar allowed to move the alarm mechanism will be thrown into action.

3. In a burglar-alarm, the combination of a frame adapted to be pivotally suspended at its upper edge in front of an opening in a building, means for pivotally suspending said frame at its upper edge, a hooked lever adapted to be pivotally suspended adjacent said frame .and engaged thereby, a cord secured at one end and engaged by said lever, alarm mechlocking-bar will release the alarm mechanism anism, a locking-bar arranged adjacent said and the alarm will be sounded. I0 alarm mechanism, and adapted to normally I In testimony whereofI aifix my signature in maintain the mechanism in passive condition, the presence of two witnesses.

said cord being connected to said locking-bar, KARL STASTKA. and said parts being so constructed and ar- Witnesses: ranged that, when the tension of the cord is H. C. EVERT,

relieved by the swinging of the frame, the K. H. BUTLEN.

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