Remote supervising apparatus
First Claim
1. Apparatus for remotely supervising, via a telephone line, a device comprising:
- sensing means for sensing for a telephone ring signal from the telephone line;
means operative when said sensing means senses a telephone ring signal for simulating an off-hook condition in order to terminate the telephone ring signal;
indicating means operative when said sensing means senses a telephone ring signal and after said off-hook condition is simulated for repeatedly producing a melody to form a series of melodies;
said melody being at least one tone signal;
means for transmitting said series of melodies to the telephone line;
counting means for counting the melodies in the series as they are produced;
key memory means connected to said telephone line and to said counting means for recording the presence or absence of a voice signal on the telephone line when a predetermined count has been counted by said counting means; and
control means responsive to said key memory means for emitting a signal which changes the condition of the device if said key memory means recorded the presence of a voice signal on the telephone line when said predetermined count occurred.
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Accused Products
Abstract
Apparatus for remotely supervising via a telephone line a device includes a sensor for sensing for a telephone ring signal from the telephone line. In response to the sensing of the ring signal there is generated an off-hook condition which causes the termination of the ring signal. In addition an indicator responsive to the sensor produce a melody continuously repeated with an interval between each transmitted melody. This repeated melody is transmitted to the telephone line for counting by the caller. In addition, within the apparatus, a counter counts the melodies as they are produced. A key memory connected to the counter and responsive to the telephone line is activated when a predetermined count has been counted by the counter and there is a voice signal on the line from the caller. The operation of this key memory alerts a control circuit for the reception of subsequent voice signals which permit the changing of state of a controlled device.
2 Citations
10 Claims
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1. Apparatus for remotely supervising, via a telephone line, a device comprising:
- sensing means for sensing for a telephone ring signal from the telephone line;
means operative when said sensing means senses a telephone ring signal for simulating an off-hook condition in order to terminate the telephone ring signal;
indicating means operative when said sensing means senses a telephone ring signal and after said off-hook condition is simulated for repeatedly producing a melody to form a series of melodies;
said melody being at least one tone signal;
means for transmitting said series of melodies to the telephone line;
counting means for counting the melodies in the series as they are produced;
key memory means connected to said telephone line and to said counting means for recording the presence or absence of a voice signal on the telephone line when a predetermined count has been counted by said counting means; and
control means responsive to said key memory means for emitting a signal which changes the condition of the device if said key memory means recorded the presence of a voice signal on the telephone line when said predetermined count occurred. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- sensing means for sensing for a telephone ring signal from the telephone line;
Specification