Toy detection and signaling circuit

Details Toy detection and signaling circuit Toy detection and signaling circuit

1987-10-23

1989-10-17

Hafer, Robert A.

Amusement devices: toys

Having light-or sound-responsive switch or control

446219, 446297, A63H 3000, A63H 3322, A63H 328

Patent

active

048743437

ABSTRACT:
A toy figure for detecting and signaling changes in ambient light level in which a detection circuit includes an operational amplifier acting as a comparator for comparing two signals from a voltage divider network. The first input signal is the signal of interest to be detected. The second input signal is held stable by a capacitor with a relatively long time constant. When the first signal exceeds the second signal, a change in output of the comparator is produced to effect both radiation and audio signal outputs from the toy figure.

REFERENCES:
patent: 3064390 (1962-11-01), Barnes
patent: 3130803 (1964-04-01), Wiggins
patent: 3274729 (1966-09-01), Refabert
patent: 4147996 (1979-04-01), Gontowski, Jr.
patent: 4199753 (1980-04-01), Gontowski, Jr.
patent: 4201012 (1980-05-01), Marshall
patent: 4479329 (1984-10-01), Fraden
patent: 4659919 (1987-04-01), Price
patent: 4662854 (1987-05-01), Fang
patent: 4675519 (1987-06-01), Price

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