Dennis Joel Roden

US Patent:

49782185, Dec 18, 1990

Filed:

Mar 1, 1990

Appl. No.:

7/486971

Inventors:

Robert S. Carpenter - Austin TX
Dennis J. Roden - Austin TX
Ernesto M. Rodriguez - Austin TX

Assignee:

Minnesota Mining and Manufacturing Company - St. Paul MN

International Classification:

G03B 2100

US Classification:

353119

Abstract:

A portable overhead projector having a folding arm. The arm and a torque member are pivotally attached to the projector head, forming a four bar linkage. When the arm is moved from an upright, operative position to a storage position, the projector head rotates so as to be flush with the base of the projector, making the projector more compact for storage. An adjustment mechanism is also provided to automatically open and close a mirror which is attached to the projector head, simplifying the set up procedure of the overhead projector.