发明授权
- 专利标题: Electric self-timer device for cameras
- 专利标题(中): 电子自拍器相机
-
申请号: US55518申请日: 1979-07-09
-
公开(公告)号: US4295724A公开(公告)日: 1981-10-20
- 发明人: Masayoshi Sahara , Masaaki Nakai
- 申请人: Masayoshi Sahara , Masaaki Nakai
- 申请人地址: JPX Osaka
- 专利权人: Minolta Camera Kabushiki Kaisha
- 当前专利权人: Minolta Camera Kabushiki Kaisha
- 当前专利权人地址: JPX Osaka
- 优先权: JPX52/123438 19770912
- 主分类号: G03B9/64
- IPC分类号: G03B9/64 ; G03B17/18 ; G03B17/40
摘要:
An electric self-timer device for a camera includes a timer circuit sequentially generating first and second signals, with respective predetermined delays in response to a trigger signal of the device, an oscillator responsive to the trigger signal to generate a first oscillating signal of a predetermined frequency and also responsive to the first signal to generate a second oscillating signal having a frequency distinguishably higher than that of the first oscillating signal, a light emitting diode energized by the first and second oscillating signals, a circuit responsive to the second signal to cease the oscillation or actuation of the oscillator, and an electromagnetic release device also responsive to the second signal to release the camera shutter. The self-timer device intermittently energizes the light emitting diode during the entire delay period to enable a person being photographed to recognize that the delay action is being effected, and changes-over the energization frequency of the light emitting diode to a higher frequency a predetermined time before shutter release is effected to indicate the moment of shutter release to the person being photographed.
公开/授权文献
- USD405450S Speaker box 公开/授权日:1999-02-09
信息查询