Coupling mechanism for the alternate manual and automatic adjust

Details Coupling mechanism for the alternate manual and automatic adjust Coupling mechanism for the alternate manual and automatic adjust

1977-04-20

1978-08-29

Griffin, Donald A.

350 75, 350187, G02B 710, G03B 302

Patent

active

041107691

ABSTRACT:
A camming sleeve for the adjustment of the shiftable components of a varifocal objective is fixed to a surrounding coaxial control ring having a slot traversed by a knob which is rigid with a slider received in a recess between the control ring and the sleeve. The slider, which is indexable in two different axial positions, has a toothed edge engageable in one of these positions with a toothed face of a coupling ring, permanently connected via a step-down transmission with a reversible drive motor, which in the other slider position is freely rotatable on the camming sleeve so that the latter can be manually displaced by means of a handle rigid therewith.

REFERENCES:
patent: 3095794 (1963-07-01), Raab
patent: 3224351 (1965-12-01), Strasser
patent: 3582188 (1971-06-01), Rau et al.
patent: 4057327 (1977-11-01), Kumazawa

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