US1063096A - Signal system. - Google Patents

Description

G. S. WILLIAMSON.

SIGNAL SYSTEM. APPLICATION FILED AUG. 23, 1912;

' Patented May 27, .19 3.

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G. S. WILLIAMSON SIGNAL SYSTEM. APPLICATION FILED AUG. 23, 19 12.

Patented May 27, 1913.

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INVENTOR a anti/ m $04.

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GEORGES. WILLIAMSON, or mexnusronr, PENNSYLVANIA, AsSIGNoR or ONE-THIRD 'ro ALBERT r. OHNSTON, or ntcxnnsron'r, PENNSYLVANIA.

SIG AL SYSTEM.

Specification of Letters Patent. I Application filed August 28, 1912'. Serial No. 716,758.

. Patented Ma 27, 1913.

which the following is a, specification,'refer-- ence being had therein to the accompanying drawing.

This invention; relates .to a signal system especially designed for municipal use as a combined telephone, telegraphand alarm apparatus such as ordinarily used in connection with police and fire departments.

My invention aims to provide, first, a noninterferingfire and police alarm system that permits of a talking circdit being maintained from which alarms or signals can be sent without interfering with call boxes throughout the system. Second, a system that can be usedin connection with the present type of fire alarm boxes by proyiding boxes with a switch released when the door of the fire alarm box is opened. Third,

a system wherein a repeater coil is utilized formaintaining separate and independent telephone and telegraph circuits-that are cut in on a main line circuit by anovel switch.

Fourth, a; Signal system that obviates the necessity of maintaining separate telephone and'telegraph stations throughout a clty 1ndependently ofjrhe fire alarm system. Fifth,

a signal system that can be used in connection with the present street wlrlng of the fire alarm system for maintaining a closed talking circuit vhen boxes are'not in use.

My invention further aims to accomplish the above results by a mechanical construction that will be hereinafter specifically described and then claimed.

Reference will now be had to the drawings wherein there is illustrated a preferred embodiment of my invention, but it is to be understood thatthe structural elements are susccptible to such changes in form, proponion and minor details as fall within the scope ofthe appended claim.

In the drawings: Figure 1 is a diagrammatic view of the electric circuits used in connection with the system, Fig. 2 is 21- diagrammatic elevation of a repeater coil forming part of the apparatus, and Figs. 3 to 6 inclusive are detail views of an alarm mechanism used in connection with a fire alarm call box. I As heretofore stated, the signal system and the apparatus employed for producing the same call, boxes therefore I have deemed it unnecessary to illustrate but have illustrated in Figs. to 6 inclusive an alarm mechanism that can be operated is applicable to different types of '60 a casing of a box,

or pulled to send in an alarm. The mocha-.1-

nism includes a train of gear wheels 1 actu .65 ated by a spring-2 that is placed in opera- -t1on orunder tension by a pull lever 3. The

train of gears places in motion an alarm tra-ted-in Fig. 3 as 444. The alarm wheel wheel; 4, containing a call wliich is illusestablishes a circuit througji leading out]? wires 5V and 6, which illustrated in Fig. 1. The leading out wire" 5 is connected to an electromagnet 7 having a spring actuated striking armature 8 that are diagrammatically repeats the alarm in connection with abell 9.- The electro-magn'et 7 and the leading out wire 6 are connected to repeater coils 10 and 1-1 of 45 ohms respectively. The reeater coil 10 is connected by wires 12 and 13 to contacts 14 and 15 respectively and the rep'eatet' coil 11 is connected by wires 16 and 17 to contacts 18 and 19 respectively.

Associated with these contacts are contacts I 20, 21, 22 and 23, the contacts 20 and23 being connected by a wire 24 and the contacts 21 and 22 by a wire 25.

The contacts 20 to 23 inclusive are nor mally. engaged by pivoted contact arms 26, 27, 28 and 29 coupled together by a bar 30 whereby all of said arms can move in unison-. The pivoted contact arms 26 to 29 inelusive constitute a switch and saidswitch is thrown in engagement with contacts 14, 15,

18 and 19 by a coiled retractile spring 31 connected to one of said arms. Toretain the arms 26 to 29 inclusive normally in en-' gagement with the contacts 20 to 23 inelusive a projection or pin 32 on the inner side of a box door 33 enga' s one of the arms and holds the switch in t e position shown.

in- Fig. 1 until the door of the call box is opened, at which time the switch .is automatically thrown. The contact arms 28 and 29' are connected to main line wires 34 and 35 respectively having a repeater coil 36 one half of which is grounded, as at 37. The

contact.- arms 26 and 27 are connectedto' are in circuit with a repeater coil 40 and one-half of this coil is in circuit with a local battery 41, an alarm bell 42 and a ground 43. The repeater coil can be in circuit through the medium a main ofiice telephone.

Connected to the repeater coil 11 are wires 46 and 47, the latter being connected to a telephone receiver 48 which is connected by a wire 49 to a coil 50. The coil 5 0,is in cir' cuit with a transmitter 51, a local battery 52 and a switch arm 53,which is connected to the wire 46. The coil is also connected by wires 54 and 55 to contacts 56 of the switch arm 55. This'telephone apparatus is of the ordinary type used 1n police call boxes and is associated with the alarm mechanism whereby a talking circuit can be used dur ing the sending of an alarmlto headquarters. By-reference to Fig. 1 it will be observed that the position of the switch arms 26 to 29 inclusive maintains the circuit through the main line wires 34,35, 38 and 39 by reason of the wires 24 and 25, consequently the talking circuit through these wires is not interfered with by the call box being closed or inactive. r

It is thought that other circuits ofthe apparatus will be apparent without further description and that the operation will be understood without specifically tracing the circuits.

*What I claim is In a non-interfering alarm system, two

of wires 44 and 45 with pairs of contacts, a pair of deading-out wires, a magnet interposed in one of said leading-out wires, a repeater coil of fortyfive ohms connected to each of said wires,

an alarm mechanism for establishing a cir- 1' cuit through said Wires, a pair of-circuit wires leading from each pair of contacts to a coil, a row of contacts arranged with the outer contacts of the 'row connected together and the inner contacts of the row connected together, a normally locked spring controlled switch including four contact arms connected together for moving in unison and normally engaging the contacts of said row 'for normally closing a main line circuit for the sending of an alarm, a pair of main line circuit wires leading to two of said arms and having interposed thereina repeater coil with one-half grounded, a pair of main line circuit wires leading from the other two arms and having a repeater COll interposed therein-with one-ha1f grounded, a

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of mum.

Washington, D. 0.

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