Patent
1975-01-22
1976-06-15
Rubin, David H.
350 46, 350254, 350255, G02B 716
Patent
active
039633063
ABSTRACT:
A cam actuated assembly for a microscope. The assembly includes a hollow tubular support member and a nosepiece or multiple objective carrier. The tubular member is provided with a cam surface and is symmetrical with respect to an axis which, in the assembled microscope, is off set from and parallel to the optical axis of the microscope. The carrier, which is also symmetrical with respect to an axis, is partially received within the tubular member and includes a cam follower which cooperates with the cam surface. The carrier also includes at least two openings or cavities each of which is adopted to receive a microscope objective. The axes of these openings are parallel to one another and off set from the axis of the carrier by an amount equal to the off set between the axis of the tubular member and the optical axis. Rotation of the carrier relative to the tubular member permits successive alignment of the axes of the objective receiving openings with the optical axis and simultaneous movement of the carrier in a direction parallel to the optical axis. Apparatus is also provided to permit limited retraction of the nosepiece or carrier into the tubular member.
REFERENCES:
patent: 1494801 (1924-05-01), Pittman
patent: 2005014 (1935-06-01), Tondreau
patent: 2065993 (1936-12-01), Billing
Bausch & Lomb Incorporated
Morgan DeWitt M.
Parker Frank C.
Rubin David H.
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