Automatic dialing and alarm system
First Claim
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1. An electrical circuit comprising:
- (a) first connection means for connecting said circuit to an electrical power source;
(b) second connection means for connecting said circuit to means sensing a condition;
(c) clock means for generating periodic signals in the form of clock pulses;
(d) counter means connected to said clock means for counting said clock pulses;
(e) reset means (i) associated with said counter means to substantially continuously reset said counter means whenever said condition is not sensed and (ii) associated with said means sensing a condition to disable said reset means whenever said condition is being sensed;
(f) dialing means responsive to said counter means to generate signals to dial a predetermined number;
(g) control means controlled by said counter means to control a time period during which said dialing means is operative;
(h) tone generating means which generates a tone signal after said control means has ended said time period; and
(i) third connection means for connecting the signals generated by said dialing means and said tone generating means with a telephone signal line.
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Abstract
A system is disclosed which may readily be added to an existing system of phones and electrical outlets. It includes circuitry that, responsive to sensing of a condition, seizes a telephone line, dials a single digit and introduces a preferably beeping signal into the line to warn the switchboard operator of the sensed condition. The system repeats the cycle until the sensed condition ceases.
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Citations
16 Claims
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1. An electrical circuit comprising:
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(a) first connection means for connecting said circuit to an electrical power source; (b) second connection means for connecting said circuit to means sensing a condition; (c) clock means for generating periodic signals in the form of clock pulses; (d) counter means connected to said clock means for counting said clock pulses; (e) reset means (i) associated with said counter means to substantially continuously reset said counter means whenever said condition is not sensed and (ii) associated with said means sensing a condition to disable said reset means whenever said condition is being sensed; (f) dialing means responsive to said counter means to generate signals to dial a predetermined number; (g) control means controlled by said counter means to control a time period during which said dialing means is operative; (h) tone generating means which generates a tone signal after said control means has ended said time period; and (i) third connection means for connecting the signals generated by said dialing means and said tone generating means with a telephone signal line. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification