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US 3,947,860 AGranted
Remote focusing device for cameras
AssigneeRicoh Company, Ltd.
InventorsTadayuki Imai, Toshitaka Shiratori
Life of this patent
Estimating the term…
Abstract
A remote focusing device for cameras is disclosed in which a focusing ring is rotatably disposed around the shutter release button coaxially thereof and is operatively coupled to a mechanism for moving the camera lens in such a way that when the focusing ring is rotated, the camera lens may be moved in the direction of the optical axis thereof for focusing.
Claims7
A remote focusing device for a camera comprising:
- a. means rotatable for moving a camera lens in the direction of the optical axis thereof for focusing,
- b. a connecting member slidably disposed for rotating said camera lens moving means,
- c. a focusing ring rotatably and coaxially disposed around a shutter release button and provided with focusing marks marked around the periphery of its top surface,
- d. a cam plate provided with a focusing cam and coupled so as to be rotatable in unison with said focusing ring,
- e. a cam follower in engagement with said focusing cam of said cam plate and drivingly coupled to said connecting member so as to slide the same in accordance with the movement of said focusing ring, and
- f. a focus index mark marked upon a camera body in association with said focusing marks.
3 more elements
Dependencies are inferred from the claim text.