US2477857A - Annunciator - Google Patents

Description

Aug. 2, BQEVE ET AL 2,477,857

ANNUNC'IATOR Filed Aug. 4, 1944 3 Sheets-Sheet l j Inventors (Zi/y @de z/e E] @mmm WWW Aug- 2, 1949- J. BoEvE Erm. y 2,477,857

ANNUNC I ATOR Filed Aug. 4, 1944 3 .Sheets-Sheet 2 Inventor:

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. 'By @Mm Mza/away M@ Aug 2, 1949. J. BoEvE ET AL 2,477,857

ANNUNCIATOR Filed Aug. 4, 1944 5 sheets-sheet 5 I nvenim/J Patented Aug. 2, 1949 UNITED STATES PATENT Q'FFICE 2 Claims.

This invention appertains to new and useful improvements in annunciators, the principal object being to provide a horn or alarm circuit for producing an audible signal for the purpose of orientating huntsmen or persons lost especially in forests.

Another important object of the invention is to provide an orienting annunciator especially intended for the purpose stated and which can be easily installed on automobiles and elsewhere, Where electricity is available.

Other objects and advantages of the invention will become apparent to the reader of the following description.

In the drawings:

Figure 1 represents a front elevational view of the annunciator.

Figure 2 is an inside rear elevational view, the rear cover being removed.

Figure 3 is a vertical sectional view through the device.

Figure 4 is a sectional View through the rotor.

Figure 5 is a fragmentary top plan view of the rotor.

Figure 6 is a diagrammatic View showing the electrical connection between the electrical elements involved.

Referring to the drawings wherein like numerals designate like parts, it can be seen that numeral 5 generally refers to a box-like structure having a top 6, a bottom I, side walls 8 and a front frame 9 in which a window I0 is mounted, This box has a rear closure II hinged in place as at I2 and provided with a fastener I3.

Inside of the box, which can be mounted suitably on an automobile or other vehicle, is a clock I4, especially of the alarm clock type. The clock is of conventional design and includes a shaft I5 performing one revolution per hour which is used in conjunction with the present invention.

In carrying out the present invention a circumferentially grooved disk I6 of insulation is secured to the shaft I5 and radially through this disk and having its linear .or strip like ends exposed in the circumferential groove thereof are conductor sections II arranged along a diameter of the disk which the spring contact fingers I8, I9 can engage. A post anchors the contact finger I8, while the contact finger I9 is carried by a post 2|.

Jumpers 22, 23 extend from the posts 20, 2| to a switch 24 mounted on the upper portion of the box 5 and operative from the outside of the box.

Numeral 25 denotes an electric horn, grounded at .one side and having a conductor 26 extending from the other side thereof to the post 20. A

source of current 2l has one side grounded and its other side connected by a jumper 28 to the diametrical conductor sections I'I in the rotor I6.

It can now be seen, that when the switch 24 (see Figure 6) is open and the apparatus is operating, when one end of the diametrical conductors I'I engages the contact finger I8, current will be supplied from the battery 2'I to the conductor 26 and horn 25, thus energizing the horn for a few moments and this will be repeated every half hour, so long as the switch 24 is open. However, in the event it is desired to offer more frequent signals, the switch 24 is closed, thus bringing into use, the spring contact finger I9, so that alternately with the use .of the linger I8, the finger I9 comes into play, engaging the ends of the conductor sections I'I with the result that current passes from the battery 21 to the parts I'I and from there to the finger I9, jumper 23, switch 24, jumper 22, to the conductor 26.

While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention as claimed hereinafter.

Having described the invention, what is claimed as new is:

1. A device for producing a periodic audible signal of limited duration comprising an electric horn, a clock mechanism provided with a time controlled minute shaft, a rotor disk of insulating material on said shaft, provided with a radial bore, a contact piece in said bore with a substantially linear conducting end surface, exposed on the periphery of the disk, a conductor leading to the conducting contact piece in said radial bore, a source of current connected with said conductor, a plurality of contact fingers, sliding on the periphery of the aforesaid rotor disk for cooperation with the contact piece in the radial bore, said contact fingers being set for contact with the periphery of the rotor disk at an angular distance less than a connection between one of said contact fingers with the electric horn, and a connection between said horn and source of current completing the circuit, whereby signals of limited duration are produced, and a manually disconnectable connection between the said linger and a further finger, having its point of contact on the rotor disk set at an angular distance from the first named linger, for changing the frequency of the audible horn signal.

2. A device for producing periodic audible signals of limited duration, comprising an electric horn, a clock mechanism provided with a time controlled minute shaft, a rotor disk of insulating material on said shaft, provided with a radial bore, a contact piece in said bore with substantially linear conducting surfaces, exposed on the periphery of the disk at diametrically opposed points, a conductor leading to the conducting contact piece in the radial bore, a source of current connected with said conductor, a contact nger sliding ,on the periphery of the aforesaid rotor disk and cooperating with the substantially linear contact piece ends, a connection between said contact nger and said horn, at least one further contact finger, sliding on the periphery of the said disk, said contact finger being in contact with the periphery of said rotor disk at an angular distance from the contact point of the first named nger with said disk, said distance not exceeding an angle of 90, an electric .connection between said contact fingers, and a manually operated switch in said connection, an electric 4 connection including the first mentioned contact finger, horn and source of current, whereby signals of limited duration twice for every full rotation of the shaft at predetermined intervals are produced and the closure of the switch in the connection between the fingers increases the frequency ,of the signals emitted by the horn.

JOHN BOEVE.

JOHN STERENBERG.

REFERENCES CITED The following referenlces are of record in the le of this patent:

UNITED STATES PATENTS Name Date Tropp Aug. 20, 1907 Gaillard June 9, 1908 Burleigh Oct. 9, 1923 Hobson Sept. 13, 1927 Jacobson Feb. 13, 1940 Number

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