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Apparatus for automatically sending a telephone warning to a police station, or other station
Apparatus for automatically sending a telephone warning to a police station, or other station
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机译：自动向派出所或其他派出所发送电话警告的设备
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599,705. Substation circuits. SVOEKHOTOFF, A. May 17, 1945, No. 12418. Convention date, July 24, 1944. [A Specification was laid open to inspection under Sect. 91 of the Acts, Oct. 22, 1945.] [Class 40 (iv)] In substation apparatus for automatically sending a telephonic warning to a police station or the like, of the type in which a connection is automatically established to the wanted station in known manner by a clockwork driven impulse transmitter set in motion by pressing a release button, a number of impulses of intermittent direct current impulses are transmitted characteristic of the calling station to enable the called party to identify the caller. As shown, the source of intermittent D.C. comprises a battery 44, and a clockwork-driven toothed wheel 47 having a contact breaker 49. A second wheel 42, which is also driven by the clockwork, has its teeth arranged to form the code of impulses characterizing the calling party and a hammer t riding over these teeth operates contacts 43 and connects the intermittent D.C. to the primary winding of transformer 46, the secondary of which is connected to the telephone line, so that a series of audible impulses is transmitted to the called party. The Specification as open to inspection under Sect. 91 includes modifications in which audible identification signals are produced by tapping the microphone with a hammer, and by bell signals. Apparatus is also described for rotating the dial of a telephone set by clockwork means to dial the wanted party. This subject-matter does not appear in the Specification as accepted.
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