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6348871 |
Adverse condition detection and notification apparatus
The present invention provides an adverse condition detection apparatus that enables a user to test the apparatus in close proximity without having to endure fully operational alarm noise. In one...
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5862236 |
Method and apparatus for controlling volume of a speaker
Apparatus (100) for controlling the volume of a speaker (109) by restricting the volume level of the speaker (109) at power on. The apparatus (100) includes a microprocessor controller (103) for...
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5502771 |
Clock radio volume control appraratus
A clock radio volume control apparatus including a conventional volume control apparatus and a supplemental volume control device for use in operation of the clock radio in sleep mode at...
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5313661 |
Method and circuit arrangement for adjusting the volume in a mobile telephone
Method and circuit arrangement for adjusting the volume in a mobile telephone. The telephone comprises a transceiver unit and on the other hand a physically separate operating device. A dc voltage...
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5164729 |
Police radar warning receiver with auto-mute function
A police radar warning receiver includes an auto-mute feature by which a driver may be alerted to the presence of police radar but without the annoyance of an unnecessarily prolonged audible alarm....
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4792990 |
Audio amplifier with programmed volume control
In a programmed audio amplifier system, the volume setting when the system is turned on is conditionally related to the last volume setting, i.e., immediately before the amplifier was turned off....
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4481674 |
Sleep switch volume control
This invention is directed at a sleep switch volume control wherein the body portion of a clock radio timer knob has conductive and insulative portions which may be formed on two transverse,...
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4060973 |
Automatic variable-sound alarm clock
There is disclosed an alarm clock in which the alarm sound is changed automatically at periodic intervals. In the illustrative embodiment of the invention, the clock emits eight different alarm...
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4047377 |
Sleep-inducing/interrupting audio system
For sleep promotion and for sleeper awakening an audio system including a wide band audio frequency generator is provided with an output speaker, volume and tone selectors, a time-alarm signalling...
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3962532 |
Power supply for an audio-video recording system
The disclosure relates to a selectively operable power supply for a recording system of the type which includes tuning and intermediate frequency sections for receiving and converting transmitted...
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