Electricity: motive power systems – Automatic and/or with time-delay means – Movement – position – or limit-of-travel
Patent
1982-09-23
1989-08-29
Ro, Bentsu
Electricity: motive power systems
Automatic and/or with time-delay means
Movement, position, or limit-of-travel
318286, 318468, 318488, G05B 106
Patent
active
048620467
ABSTRACT:
The present invention is a zoom motor control for controlling an electric motor for use in combination with an auto zoom device for a movie camera. The auto zoom device includes a rotating member driven by the electric motor and a zoom-lens tube rotating member. The zoom motor control includes a rectangular housing which an operator of the movie camera may comfortably hold in his hand and a strain gauge sensor which is mechanically coupled to the rectangular housing. The strain gauge sensor is disposed so that the operator may apply with his thumb a varying amount of pressure in either direction. The strain gauge sensor has an output signal which is proportional to the varying amount of pressure. The zoom motor control includes a control circuit for converting the output signal of the strain gauge sensor to a control signal for controlling the electric motor of the auto zoom device. The control circuit is disposed in a hollow cavity of the rectangular housing and is electrically coupled to the strain gauge sensor. The circuit zoom motor also includes a multi-turn potentiometer which controls the maximum zoom speed of the auto zoom device and a high/low speed switch for lowering the maximum zoom speed of the auto zoom device by a fixed amount. The circuit zoom motor further includes a "zap" switch which allows the operator to drive the electric motor of the auto zoom device at high speed without having to change the maximum speed setting.
REFERENCES:
patent: 2571454 (1951-10-01), Jones et al.
patent: 2810256 (1954-02-01), Geyer et al.
patent: 2843810 (1958-07-01), Carr
patent: 3649898 (1972-03-01), Inoue
patent: 3733532 (1973-05-01), Hill
patent: 3834796 (1974-09-01), Komine
Johansen W. Edward
Ro Bentsu
LandOfFree
Zoom motor control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Zoom motor control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zoom motor control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2240653