Adjustable objective holder
OwnerPeter Dziembainventor
Life of this patent
Estimating the term…
Abstract
The adjustable objective holder for optical projectors has a focussing support formed as a single piece defining two pairs of juxtaposed walls forming a parallelogram. The walls of one pair are rigid whereas the walls in the other pair are flexible. One rigid wall is fixedly mounted to the apparatus and supports for rotation a control shaft. The opposite rigid wall has on its inner surface a control groove which engages an eccentric formed on the end of the control shaft so that during the rotation of the eccentric the flexible walls are uniformly swung and due to the parallel linkage the movable rigid wall together with the objective performs a linear movement at right angles to the transparency.
Claims7
An adjustable objective holder for use in a projecting device, comprising:
- a focussing support having two pairs of juxtaposed walls forming a parallelogram;
- one pair of said walls being rigid and the other pair of said walls being flexible;
- the outer surface of one of said rigid walls including means for mounting an objective thereon and the inner surface of said one rigid wall being formed with a control groove;
- the other rigid wall supporting for rotation a control shaft having an eccentric end portion, said eccentric portion engaging said control groove to swing said pair of flexible walls and thus to displace along a straight line said one rigid wall during the rotation of said shaft;
- and means for fixedly mounting said other rigid wall in said device.
Dependencies are inferred from the claim text.