US1010415A - Combined watchman's clock and telephone system. - Google Patents

Description

F. G. DURYEE.

COMBINED WATCHMANS CLOCK AND TELEPHONE SYSTEM.

APPLIGATION FILED MAR.B.1910,

1,010,415. Patented Dea, 1911.

INVENTDH FEED. G. DUR YL'E.

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His TTURNEK UNTTED STATES PATENT oEEioE.

FREDERICK G. DURYEE, F FORT WAYNE, INDIANA,`ASSIGNDR ".LC` GENERAL ELECTRIC COMPANY,` A CORPORATION 0F NEW YORK.

COMBINED WATCHMANS CLOCK AND TELEPHONE' SYSTEM.

Specication of Letters Eatent.

Patented Dec, 5, gl.

Application mea umh 3,1910. serial no. 548,03?.

To all whom it may concern: y

Be it known that I, FREDERICK G. DURYEE,

a citizen of the United States, residing at' the object of my invention is to adapt such a. system for use also as a telephone system to enable the Watchman on his rounds to communicate fromy any one of the stationsl with the head watchman, or other person, at the central oiiice.

The ordinary Watchmans clock recorder system comprises a clock recorder at the central office, a number of circuits extending from t-he clockrecorder to the several stations, and means at each station for closing the circuit at that station .to actuate the clock recorder. A common return is ordinarily employed for the several circuits.

My invention consists in placing in cir- A cuit with each station a time limit device with signaling means controlled thereby so as to be actuated when the circuit at any station is kept. closed for a predetermined time, together with means for cutting a telephone into circuit at any of the stations. A single .time limit device may be placed in the portion of the circuit common to all the circuits, so as to be operable from all the stations. With the Watchmans system thus arranged, if a watchman passing the station merely Wishes to actuate the recording clock, he

closes the circuit at that station momen` is in series with the circuit.

and I preferably employ indicating means at each station, responsive to this decrease in current,.for indicating that the teiephone at the central oiiice is out into circuit. The Watchman at the station then cuts telen phone into circuit and communicates through it with the-central oiiice.

My linvention wiii best be understood by reference to the accompanying drawings in Which- Figure 1 shows diagrammaticaliy combined clock recorder and telephone system arranged in accordance with my invent-ion, and Fig. 2 shows a detail of the plug for making the telephone connection.

In the drawings, A represents the clock recorder, which is merely indicated in outline, since the structure of such devices is lWell understood in the art and forms no part of my invention. Certain of the 'actuating magnet coils of the clock are indicated at a. These coils are included in the circuits which run to the several stations, of which I have indicated six on the drawing, num bered B to B5. 0f course, the number of stations may be very much larger than this. At each station is a pivoted arm C which may be moved into engagement With a. contact c so as to close the circuit at that station. The arm is normally held in oii' position by a spring c. This spring also serves to return the arm to i oif position after it has been moved into engagement with the con' tact c and released. Thus, if the arm C is simply moved to a mid position, that is, to an approim'ately vertical position and then released,v thepcircuit at that station is momentarily closed and the recording clock actuated in the usual manner. If the arm C is moved to the vextreme on position, it isv held in that position by a magnet D which The Several circuits have a common portion consisting of the common return wire e, a battery E,

the heating coil F of a thermostat, and coni tacts f actuated by the hook su porting the receiver of a telephone G. en the arm C is moved to the extreme on position and held there by its magnet l), the'current iiowing through the heating coil F causes theV thermostat, after a predetermined time, to close a local circuit containing a bell H and source of current I. This not-ities the head watchman that some other Watchman wishes to speak to him. When he moves the receiver of the telephone G' from the hook, the circuit of thermostat F is opened at contacts f and the telephone G c'ut into circuit in its place. The resistance of theftelephone i's much higher than that of the thermostat, so that the current is greatly reducedv when the head watchman takes'the receiver from the hook. This decrease in current causes the magnet Dto release the arm C at the station, so that the arm is pulled back to oi position by the spring c; The watchman at the station now cuts in the portable telephone which lie carries with him by means of a'plug K (shown at station B4) and contacts J. Thisiplug, as is shown in Fig. 2, comprises simply two contact pieces separated by a-strip of insulation so that the portable telephone apparatus L is cut into circuit between thecontacts J. As soon as the conversation is over, the plug K is withdrawn and the receiver of tele'- phone Gr replaced on the hook, and the system is restored to its former condition. Thus, it will be seen that by means of my invention, without in any way interfering with the normal operation of the system as a watclimans clock system, simple and ready means for telephonie communication is provided between each of the stations and the central oiiice.

.l do not desire to limit myself to the particular arrangement of parts shown and de= scribed, but aim in the appended claims to cover all modifications which are withiii the spirit and scope of my invention.

' 'What I claim as new and desire to secure by Letters Patent of the United States, is.-

Il. A combined watchmans clock and telephone system,` comprising a watchmans clock recorder, a plurality of circuits eX- tending from said recorder to the several stations, means at each station 'for closing the circuit at that station to actuate the-' recorder, a time limitdevice included in said circuit, a signaling device controlled by said time limit device so as to be actuated when said circuit is kept closed a predetermined time, and meansat each station orcutting a telephone into tlie circuit at that station.

Q. A combined Watchmans clock and telephone system, comprising a Watclimans clock recorder, a plurality of circuits eX- tending from said recorder to the several stations, said circuits having a common return, means at each station for closing the circuit at that station to actuate the recorder, a time limit device included in the portion of the circuit common to all the circuits, a signaling device controlled by said time limit device so as to'be actuated when any one of said circuits is kept closed a predetermined time, and means at each station for cutting a telephone into the circuit at that station.

3. A combined watchmans clock and telephone system, comprising a watchman`s clock recorder, a, plurality of circuits extending from said recorder to the several stations, said circuits having a common return,

means at each station for closing the circuit at that station to actuate the recorder, a time limit device included in the portion of the circuit common to all the circuits, a signaling device.controlled by saidtime limit device so as to be actuated when any one of said circuits is kept-closed a, redetermined time, means at said signaling evice for cuttiig'a telephone into said common portion of the circuit, means at said station for indicating the cutting in of said telephone, and means for cutting into circuit a telephone at said station.

4. A combined watchmans clock and telephone system, comprising a' watchmans clock recorder, a plurality of circuits extending rom said recorder to the several stations, said circuits having acommon return, means at eachstation for closing the ci rcuitat that station to actuate the recorder, a time limit device included in the portion of the circuit common to all the circuits, a signaling device controlled by said time limit device so as to be actuated when any one of said circuits is kept closed a predetermined time, means at said signaling device for cutting a telephone into said common portion of the circuit, indicating means at said station responsive to the decrease of current incident to the cutting in 'of said telephone, and means for cutting into circuit a telephone at said station.

5. A combined Watchmans clock and telephone system, comprising a Watchmans recorder, a plurality of circuits extending from said recorder tothe several stations, said circuits having a common return, a movable switch member at 'each station, means for normally holding said member in off position and returning it to said posit-ion when released, a contact adapted to be engaged by said member to close -the circuit at said station to actuate said recorder when the member is moved to extreme on position or to a mid position, a magnet in said circuit for retaining said member in extreme on position, a time limit device included inthe'portion of the circuit common to all the circuits, a. si aling device controlled by said time limit device so as to be actuated when any one of said movable members is maintained in on position, means at said signaling device forV In Witness whereof, I have hereunto set cutting a telephone into circuit, the retainmy hand this 4th day of March, 1910.

inv magnet for 'the movable member being adlpted to release said member upon the re- FRED' G' DURYEE duct-ion of current incident to cutting said Witnesses: telephone into circuit, and means for cut- JAMES J. Woon,

ting a telephone into circuit a't any station. EDWARD A. BARNES.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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