Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1994-11-29
1998-05-05
Crosland, Donnie L.
Communications: electrical
Condition responsive indicating system
Specific condition
340573, 340555, 340691, 340693, 3403846, 401241, 40455, 362 98, 434317, G08B 1314, G09F 100
Patent
active
057480826
ABSTRACT:
A light sensitive switch for the activation of an alerting circuit (70) to be used as an electronic alerting device (50). Alerting device (50) may be used in publications such as a magazine (78) or book (94) to enhance the printed material by audio visual and/or mechanical vibration means. A photosensor (52) is used to detect ambient light when the publication is opened to an activation page (86) where the enhancement is located. Photosensor (52) switches on a transistor (66) when exposed to light, which in turn switches on alerting circuit (70). Alerting circuit (70) may consist of an audio transducer (74), a lamp (76), a motor (128), a solenoid (136), a mechanical vibrator or any combination of these. Pages are used to block ambient light from photosensor (52) when the publication is closed, thus turning off alerting device (50).
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Crosland Donnie L.
Rasor Gregg
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