Patent
1987-12-31
1989-03-28
Gellner, Michael L.
354131, 354132, G03B 1503, G03B 1718
Patent
active
048168505
ABSTRACT:
An alarm and control device is provided for a camera system including a camera which, when operated, produces a corresponding synchronizing control pulse; one or more flash or strobe units; and one or more flash sensors which sense the operating state of an associated strobe unit and produce a corresponding output signal. The device includes first and second inputs for receiving, respectively, input signals related to the synchronizing pulses produced by the camera and input signals related to the output signals from a flash sensor, and first and second signal conditioning circuits for conditioning the signals received at the first and second inputs. An output circuit, connected to the strobe unit and to the first signal conditioning circuit, produces an output signal for activating the associated strobe responsive to receipt by the first input of an input signal as aforesaid. The device also includes a first indicator device for indicating proper operation of the camera system, a second indicator device for indicating improper (failed) operation of the camera system, and logic circuitry, connected to the outputs of the first and second signal conditioning circuits, for providing activation of the first indicator device responsive to a first set of signals from the signal conditioning circuits and for providing activation of the second indicator responsive to a second set of signals from the signal conditioning circuits.
REFERENCES:
patent: 4494852 (1985-01-01), Smith, Jr.
Ehlers Gerald L.
Phillipeaux Eddy J.
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