US975175A - Alarm system. - Google Patents

Description

W. J. ST. ONGE.

ALARM SYSTEM.

APPLII'JATION FILED JULY 5, 1910.

Patented Nov. 8, 1910.

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- WA,L '1ER J. ST. ONGE, or LYnrmoHIo, ASSIGNOR TO THE DEAN ELECTRICICOMPANY, or ELYRIA, 01110, A CORPORATION or OHIO.

ALARM SYSTEM.

T all whom it may concern.

- Be it known that I, ALTERJ Ta ST. Owen,

' a citizen of the United States, residing in Elyria, in the county of Lorain and State of Ohio, have invented certain new and useful Improvements in Alarm Systems; and I do hereby declare the following 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.

My invention relates to alarm systemsv and is more especially directed at means for controlling the same. In such systems as fire alarm, watchmen and similar systems, it is common toemploy a box at the substations where a key is mounted behind seine fragile substance, such as glass, a glass plate for example. This key can be reached by crushing the fragile plate. It is then removed and the box unlocked, opened and the firealarm signal sent in. The fragile plate is often used to control a circuit employed in connection with the system; sometimes the main circuit itself. There may be a switch in the circuit which is'restrained by the plate from operating to open or close the circuit to complete the desired connect-ions or cause other changes as required. In order to release the switch it is necessary to crush the part of the plate restraining the same. The

idea, being that this portion of the plate will be crushed when the part inclosing the key is broken for the purpose of removing the key. As sometimes happens only that portion of the plate proximate to the key is crushed, the key being removed leaving the switch or other circuit controlling means in its normal position. I have devised means to prevent this, associating the key with the circuit controller in such a Way that it cannot be removed without crushing that part v ofthe plate whichrestrains the circuit controller, thus releasing the same.

My invention will be best understood by reference to the following description when taken in connection with the following illustrations showing specific embodiments there of, while the scope will be more particularly pointed out in the appended claims.

Figure l is a front view of the device. Fig. 2 is a horizontal cross-section taken above the key showing the circuit controller and a diagram of circuit connections con- 7 Specification of Letters Patent.

Patented Nov. s, 1910.

Application filed July 5, 1910. Serial No. 570,301.

I trolled thereby. Fig. 3 is afront view of a modified form.

Referringnow to Figs. 1 and 2: At 1, I show a P0111011 of thebox, at 2 an escutch! eon plate, at at a glassplate held between.

the box 1 and the escutcheon plate The portion 1 and the plate 4 form the walls of the inclosure A. A hollow stud 3, is mounted in the back wall of this space and extends near to the rear surface of the plate I. A button is mounted to reciprocate in this: hollow stud.

At 6 I Show akey, the eye ofwhicla fits. over the stud 3, so that-the key is loosely attached or hung thereto.

At. 7 and 8 I show the contact springs of: an electric switch. The spring'8 isconnect? ed by an insulating stud 11' to a long spring 9, which engages the 1 button 5, tending; always to press it toward the glass 4,'whichf acts as a restraint thereupon. hen the glass is broken, this spring pushes the button forward until the spring 9 engages a fourth spring contact 10. which is spaced from the back of the inclosurebyan insulating stud 12. The other ends of the springs. are separated from each other by insulating members 13. The springs 9 and 10 are connected in a circuit 1617 with a lamp 15 and a battery B. lVhenthe glass is broken,

the switch 910 closes, completing a circuit through this lamp and the same is lighted. The springs 7 and 8 are connected in a shunt 18-19 of a switch 20-21 in the main circuit 2223. The switch 20-21 is adapted to be operated by make and break wheel 2%, controlled through a lever, 25. Then the box is open, the lever 25 is depressed to send in the fire alarm signal to the central station. Unless the switch 7'8 is opened, nosignal will be sent,'as the switch 20-21 will be shunted. Ittherefore happens, that when the key is removed and the signal sent in, unless the glass is broken to release the button 5, no signal. will be sentto the central station. By my arrangement it is impossible to remove the key without breaking the glass around the button.

In Fig. 3 I show a modification, the escutcheon plate being shown at 102, the glass v for the purpose of clearly illustrating specific embodiments thereof.

button through this'ring. When the key is removed, the ring will break the glass around the button releasing the same.

I While I have shown these particular forms of my invention, it will be obvious to those skilled in the art, that numerous and ex tensive departures from the form and the details of the a paratus here shown may be made Without eparting from the spirit of this invention, the same being shown herein 1. In a device of the class described, the combination of an electric circuit, means for controlling said circuit, a key, an inclosure in which said-key is mounted, and means to cause the operation of said circuit controlling means before said key can be removed from the'inclosure.

2. In a device of the class described, the combination of an electric circuit, means for controlling said circuit, a key, an inclosur'e in which said key is mounted, a fragile plate forming part of the inclosing walls and means to cause the operation of said circuit controlling means before said key,can be removed from said inclosure.

3. In a device of the class described, the combination of an electric circuit, means for controlling said circuit, a fragile plate controlling said means, a key and an inclosure therefor,'-said key adapted to crush said plate when the key is removed from said inclo-- sure.

4. In a device of the class described, the

combination of an electric circuit, a switch I means mounted in said .inclosure controlling said switch spring, a spring pressin said means against said plate, a key house in said inclosureadapted when removed to cause the crushing of said plate whereby said spring pressed means is released and said switch operated.

6. In a device of the class described, the

combination of an electric circuit, a switch in said circuit, an inclosure, a fragile plate mounted in the Walls of said lnclosure, a

button mounted insaid inclosure, a spring pressing said button against said plate, and a key housed in sai inclosure, adapted when removed to cause the crushing of said cums plate, whereupon said button is released and said switch operated,

7. In a device of the class described, the

combination of an electric circuit, a switch therein, an inclosure, a hollow stud mounted in said inclosure, a button controlling said switch mounted to reciprocatein said stud, a fragile plate, said button being spring pressed against said plate and a key loosely connected to said stud, said key adapted to' cause the crushing of said plate when removed from said button, whereupon said spring pressed button is released and said switch operated.

8. In a device of the class described, the

combination .of an electric circuit, means controlling said circuit, a fragile plate normally restraining the operation of said means, a key and a ring attached to said key and said means, said key and ring adapted to crush said plate to permit the operationof said circuit controlling means when the key is removed thereupon.

9. In a device of the class described, the combination of an inclosure, an electric circuit, normallylrestrained circuit controlling means mounted in said inclosure a key associated with said circuit controlling means and means to prevent the removal of said key until said circuit controlling means is released.

l0. Ina device of the class described,-the combination of an electric circuit, normally restrained circuit controlling means,'a key associated therewith, and means to prevent the removal of said key therefrom until said circuit controlling means is released.

11. Ina device as described, the combination of an electric circuit, a switchtherein, means normally restraining said switch, a key associated with'said switch, said restraining means adapted to release said switch when said key is removed.

12. In adevice as described, the combination of an electric circuit, a switch, therein, a fragile plate normally restraining said switch, a key associated with said switch, said plate adapted to release said switch when said key is removed.

13. In a deviceof the class described, the

combination of an electric circuit, a switch therein, a fragile plate normally restraining said switch, a key associated with said switch, said key when removed adapted'to cause the crushing ,of said plate, whereby said switch is released,

In testimony whereof, I afiix my signature in the presence of two witnesses.

WALTER J. ST. ONGE.-

Witnesses:

T. K. DIEDRICK, F. 0. Brown.

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