Patents Represented by Attorney DeWitt Morgan

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  • Counterbalancing apparatus for use in an optical instrument
    Patent number: 4685648
    Abstract: An apparatus for counterbalancing the weight of the movable member in a precision instrument includes a resilient member which is coupled, by way of a non-elastic member, over an eccentric surface of a rotatable member to the movable member. Rotation of the eccentric member causes the resilient member to deform an amount proportional to the eccentricity of the member and a nearly constant counterbalancing force may be applied to the movable member.
    Type: Grant
    Filed: May 17, 1985
    Date of Patent: August 11, 1987
    Assignee: Bausch & Lomb Incorporated
    Inventors: Michael H. Dobner, Evan A. Edwards