Flash apparatus with automatic light termination having gating and anticipation means
    2.
    发明授权
    Flash apparatus with automatic light termination having gating and anticipation means 失效
    具有自动光接收功能的闪光装置具有增益和预测手段

    公开(公告)号:US3519879A

    公开(公告)日:1970-07-07

    申请号:US3519879D

    申请日:1968-07-25

    Applicant: HONEYWELL INC

    Inventor: OGAWA FRANCIS T

    CPC classification number: H05B41/325 G03B7/16 G03B15/04 G03B15/05 G03B2215/05

    Abstract: 1,225,917. 917. Light-responsive control circuits. HONEYWELL Inc. July 25, 1969 [July 25, 1968], No.37410/69. Heading G1A . [Also in Divisions G2-G3, H2 and H3-H5] Photographic flash apparatus comprises circuit means to initiate a flash, e.g. in an electronic flash tube, and a light-responsive control circuit to to control the duration of the flash either identical to that described in Specification 1, 225, 916 or including the modifications of this circuit detailed in Figs.2 or 3 (not shown). The main claim relates to circuit means operable to initiate a flash, a light-responsive control circuit arranged to generate an output signal when a light-sensitive device within the control circuit has been exposed to a predetermined total quantity of light, terminating means responsive to an output signal from the control circuit either effectively to terminate the flash or to actuate means for otherwise effectively terminating the exposure of the film in an associated camera and gating means for controlling the operative condition of the light-responsive control circuit, said gating means being coupled to said circuit means at points across which a significant voltage change occurs on initiation of a flash, and being arranged to operate so that the control circuit is free to operate only for a period following the occurrence of said voltage change. The modifications are only to the gating circuit including the addition of further resistors, a capacitor, and a diode to the transistor (42) circuit, (Fig.2), and the use of a silicon controlled rectifier and a further transformer instead of the transistor circuit, (Fig.3).

    Control circuit for photographic apparatus
    3.
    发明授权
    Control circuit for photographic apparatus 失效
    摄影器材的控制电路

    公开(公告)号:US3917395A

    公开(公告)日:1975-11-04

    申请号:US37469173

    申请日:1973-06-28

    Applicant: HONEYWELL INC

    Inventor: OGAWA FRANCIS T

    CPC classification number: G03B7/17 G03B7/003 G03B7/093 G03B7/16

    Abstract: An automatic photographic camera, which features automatic focusing, automatic exposure control, automatic flash operation and automatic film advance and shutter cocking, includes an electronic control circuit. The electronic control circuit includes a binary logic circuit which is responsive to a number of parametric signals to effect a control of the timing and actuation of the several automatic functions of the camera.

    Abstract translation: 具有自动对焦,自动曝光控制,自动闪光操作和自动胶片提前和快门启动功能的自动照相机包括电子控制电路。 电子控制电路包括二进制逻辑电路,该二进制逻辑电路响应多个参数信号来实现对相机的若干自动功能的定时和致动的控制。

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