Communications: electrical – Condition responsive indicating system – Specified indicator structure
Patent
1998-04-01
1999-04-13
Mullen, Thomas
Communications: electrical
Condition responsive indicating system
Specified indicator structure
3405733, 3405734, 340600, 3406935, 3406939, G08B 2508
Patent
active
058942750
ABSTRACT:
A record/playback module includes a case and an electronic circuit supported by the case for recording an audio message under control of a user and thereafter automatically playing the audio message in response to a change in ambient light. The electronic circuit has a RECORD mode of operation in which the electronic circuit records the audio message and a PLAY mode of operation in which the electronic circuit plays the audio message. The electronic circuit includes a first switch for initiating the RECORD mode of operation and a light sensitive subcircuit for initiating the PLAY mode of operation. The light sensing subcircuit is adapted to initiate the PLAY mode of operation when a second switch is in a first switch position and the ambient light increases, and when the second switch is in a second switch position and the ambient light decreases. One embodiment includes a battery power supply, an on-off switch, a light emitting diode indicating the RECORD mode of operation, and a case having a size and shape suitable for placement in a user's refrigerator with a reminder message that plays when the refrigerator door opens.
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patent: 5485139 (1996-01-01), Tarnovsky
Hanson Loyal McKinley
Headway, Inc.
Mullen Thomas
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