Patents by Inventor Robert E. Stevenson

Robert E. Stevenson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Lifting equipment having a boom structure and a control mechanism for use therewith using a flexible light guide
    Patent number: 4044856
    Abstract: Lifting equipment having a support structure and a boom structure mounted on the support structure with a workman's platform carried by the boom structure. The boom structure includes means for electrically insulating the workman's platform from the support structure. A source of light is carried by the boom structure. A control mechanism is provided which is accessible from the workmans's platform. The control mechanism has means for receiving light from the light source. At least one light guide means is carried by the boom structure and is coupled to the control mechanism whereby upon operation of the control mechanism a light from said source can be selected and introduced into the one light guide means. Photosensitive means is provided for sensing when light is introduced into the light guide means.
    Type: Grant
    Filed: July 25, 1975
    Date of Patent: August 30, 1977
    Assignee: General Cable Corporation
    Inventor: Robert E. Stevenson