US2171152A - Electrical signaling system and device therefor - Google Patents

Description

Aug. 29, 1939. (w. R. M. VERY ELECTRICAL SIGNALING SYSTEM AND DEVICE THEREFOR Filed April 27, 1956 INVENTOR WILLIHM BM VERY ATTORNEY Patented Aug. 29, 1939 ELECTRICAL SIGNALING SYSTEM AND DEVICEv TREFOR William R. M. Very, Philadelphia, Pa.

Application April 27,

3 Claims.

This invention relates to improvements in electrical signaling systems and devices therefor, and has for its object the provision of a system whereby the condition of an electrical circuit may be indicated by either visual or audible means, or

a combination of both such means.

Another object of the invention is to provide a device of the above character whereby the condition of an electrical circuit may be indicated at a remote point. I

A further object of the, invention is to provide an electrical signaling device comprising a compact unit structure which may be used in a variety of places, such for example as in the tailll5 light of an ordinary automobile, and where, in the event that the regular lamp should fail, an auxiliary lamp will be automatically switched into circuit while at the sametime an audible signal will be given.

The invention consists substantially in the construction, combination, location and relative arrangement of parts, all as will be more fully hereinafter set forth and as shown by the accompanying drawing and finally pointed outin 5 the appended claims.

From the following specification, it will be evident that the signaling device herein disclosed may be used in a large variety of circuits and that the main circuit, hereinafter termed the work circuit may include one or more lamps, amotor or other electrically operated device,-or a plurality of signal lights, relays or other devices such as used in street lighting circuits, railway circuits or in fact in circuits where electrical apparatus and devices are used, and that the auxiliary circuit, hereinafter termed the telltale circuit may be equipped with a lamp or annunciator drop any other means to give a visual signal, and. that any suitable means for to producing an audible signal may be used, or a combination of both visual and audible signals y B p oyed in the tell-tale circuit.

It will also be obvious that the signaling de-' vice may be employed with any suitable Source of power, depending on the apparatus or devic located in the'work circuit, and that through simplerelay mechanism of any well-known ch acter, the tell-tale circuit may be operated from a local Source Furrent other than the power source.

As such modifications are well known, they are not described herein.

For the sake of illustration, the invention will be described en r lly as applied to work circuits containing lamps and more specifically in con- 1936, Serial No. 76,584

nection with a unitary device adapted to be plugged into a lamp socket of the ordinary tail light of an automobile.

In the accompanying drawing:

Figure 1 is a schematic diagram of an electrical signaling system embodying the invention and employing an electromagnetic relay for actuating the tell-tale circuit;

Figure 2 is the system, same as Figure 1, but employing a thermostatic switching mechanism; 10

Figure 3 is a system similar to that shown in Figure 1 except that the relay is included in shunt with a resistance serially included in the main circuit;

Figure 4 is a diagram of a system similar to Figure 3, except that a thermostatic switch is used to actuate the tell-tale circuit;

Figure 5 is a top view of a self-contained unit device embodying the invention, and particularly adapted for use in the tail light of an automo- 20 bile;

Figure 6 is a sectional view on the line 6-6 of Figure 5; and.

Figure 7 is a view of the unit device shown in Figures 5 and 6 plugged into the lamp socket in an ordinary automobile tail light, the casing of said lamp structure being shown in section.

In Figure 1, the numerals l0 and H denote the conductors of a work circuit which may extend from the apparatus to some distant point and 30 which may include any electrical device such as a lamp l2. Conductor l0 may be connected through the terminal l3 via conductor M to a suitable source of current such as a battery 15 which is connected via a terminal Hi to a winding I! of a relay generally denoted by the numeral l8 having an armature I9 and a contact 20.

The armature I9 is connected to one side of the winding l1 and via a conductor 2| is connected to a terminal 22 to which is connected the con- 40 ductor I l of the work circuit.

As shown in the figure, a circuit may be traced in which the battery I5, the work circuit, the lamp or other device l2 and the winding of the relay I1 are included in series. The relay is therefore 5 actuated, the armature l9 being drawn away from contact 20 as long as the circuit through the device I2 is intact. 4,

Assuming that the work circuit is broken by reason of any failure therein or in the device I2, 50

Obviously current will momentarily cease to flow through the winding I! of the relay, and consequently the armature I9 will be released and will close against contact 20.

A circuit may now be traced from the battery 55 v g- 29, 1939- J. B. WARDEN 2,171,153

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