US741573A - Alarm system. - Google Patents

Description

No. 741,573. PATENTED' OCT. 13, 1903.

' E. H. BALLOJU.

ALARM SYSTEM.

APPLICATION IILBD AUG. 13, 1901.

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'PATENTED OCT. 13, 1903.

B. H. BALLOU.

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ALARM SYSTEM.

APPLIUATION FILED AUG.13.. 1901.

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m: NORRIS are. 741,573. Patented October 13, 1903.

UNITED STATES PATENT ()EEIcE.

ERNEST H. BALLOU, OF BINGHAMTON, NEW YORK, ASSIGNOR OE ONE-HALE TO ERNEST II. BEARD, OF ACADEMY, WEST VIRGINIA.

ALARM SYSTEM.

SPECIFICATION forming part of Letters Patent No. 741,573, dated October 13, 1903.

Application filed August 13, 1901. Serial No. 71,927. (No model.)

To all whom it may concern: 15 also tubular, all of the bars of the cells Be it known that I, ERNEST I-I. BALLOU, a and corridor of each wing being connected in citizen of the United States, residing at Bingseries and having connection with a reservoir hamton, in the county of Broome, State of 16, which may be located beneath corridor-10 55 New York, have invented certain new and or any other suitable place, so that the series useful Improvements in Alarm Systems; and of bars may be supplied with air under pres- I do hereby declare the following to be a full, sure. With this arrangement if any one of clear, and exact description of the invention, the bars is cut or broken, as in the attempt of such as will enable others skilled in the art to a prisoner to escape, there will be a drop in 60 which it appertains to make and use the same. pressure in the pipe connecting such bar with Thisinvention relates to alarm systems, and its reservoir. To give warning when this particularly to that class employed in connecdrop occurs, an alarm mechanism is provided tion with jails or safe-deposits for giving an and consists of a head 17, which is connected alarm when entrance thereto or egress thereto the pipe leading from the tubular bars to 65 from is forced. the reservoir, and this head is provided with The object of the invention is to provide a diaphragm 18, carrying a stud 19, which latsuch an arrangement that if the bar of the ter is passed through an opening in a cap grating is cut or broken or a door is opened of the head and has a transverse contact-strip notice of that fact will be given by the sound- 21 for engagement with the contact-points 22 7o 20 ing of an alarm and the general location of and 23 upon the cap. The points 22 and 23 the break will be indicated. are electrically connected with bindingposts Further objects and advantages of the in- 2i and 25, which are connected in the circuit vention will be understood from the following of a battery 26, which circuit also includes description. one point of the enunciator 27. When the 75 25 In the drawings forming a portion of this air in the tubular bars is under pressure, the

specification, and in which like numerals of diaphragm 18 is pressed upwardly and raises reference indicate similar parts in the several the stud 19, with the strip 21, out of engageviews, Figure 1 is diagram showing the cells ment with contacts 22 and 23 and holds it in in a jail equipped in accordance with thisinthis position, so that the battery-circuit is 80 3o vention. Fig. 2 is a detail View, partly in secopen. When the bar is broken orcut, so that tion and partly in elevation and showing a the pressure drops, the diaphragm is forced portion of a cell with the tubular bars and downwardly through the medium of ahelical with the door-hinges. Fig. 3 is a detail secspring 28, disposed between itand the cap 20 tional view showing the circuit-closure. Fig. and encircling the stud 19, and the strip 21 is 85 5 4 is an elevation showing a portion of the brought into contact with the points 22 and front of a cell having a door equipped with 23 to close the battery-circuit. This circuit hinges embodying the present invention. includes a bell, as is usual, and the enuncia- Referring now to the drawings, there is tor indicates in which wingthe break has 00- shown in the diagram a jail which includes curred. 90

the three wings 5, 6, and 7, in each of which In a system of this kind itis alsoimportant is located a series of cells 8, in the front porthat an alarm be given if a door is opened, tion of the building being the office 9, while and for this purpose the door ofeach cell and in the central portion is the usual open corrithe door of each corridor are provided with a dor 10. In each wing are two lines of cells, special hinge. (Shown in Fig. 2 of the draw- 5 which are separated bya corridor 11, the ends ings.) This hinge comprises a leaf 30, havof which are closed by the gratings 12 and 13, ing a tubular pintle 31, which is disposed in the grating 13 having a door 14 for entrance the socket 32 of the leaf 33, said pintle at its to the corridor 11. In the present instance upper end communicating with the atmosthere is apassage-way around the whole numphere. The leaf 30 is attached to the door, ICO her of cells in each Wing. The bars 12 and 13 while the leaf 33 is secured to one of the bars are tubular, and each of the cells has its bars at the side of the diaphragm. Leading to the socket 32 is a tube 34:, which is connected by a nipple 35 with a T connection 36, which is incorporated in the tubing of the grating. The tube 34: opens into the socket 32, and when the door is closed the pintle 31, which [its the socket closely, closes the tube 3st and prevents escape otair therefrom. The pintle 31 has an opening 37 so positioned that when the door is opened this opening registers with the tube 3-1: to permit escape of air through the pintle, thus allowing the pressure to drop and the alarm to be sounded. It will thus be seen that escape cannot be made either by openingthe door or by cutting orbreaking the bar without notification thereof being given.

It will be understood that in practice modifications of the specific construction shown may be made and that theinvention may be applied to sate-deposits, vaults, and other places from which people are to be excluded.

WVhat is claimed is 1. The combination with an inclosure consisting of tubular bars connected in series, and a door, of a hinge including a leaf attached to the door and havinga downwardly-directed hollow pintle communicating with the atmosphere provided with a lateral port, asec- 0nd leaf attached to a bar of the inclosure and having a socket in which thevpintle is rotatably received, said socket having a port disposed for registration with the port of the pintle when the door is opened, a pipe leading from the port of the socket to a bar of the inclosure, an airsupply connected with the bars of the inclosure for supplying air thereto under pressure, an alarm, a pneumatic circuit-closer connected between the air-supply and the inclosure, and a batteryin circuit with the alarm and the circuit-closer.

2. The combination with an inclosure comprising tubular bars, of a door, a hinge connecting the door and a bar of the inclosure, and means for supplying air under pressure to the tubular bars, said hinge including a valve constructed and arranged to vent the tubular bars when the door is opened.

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

ERNEST I1. BALLOU. \Vitnesses:

ARTHUR BOGART, HARTWELL M. BALLOU.

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