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AssigneeGeneral Cable Corporation
InventorRobert E. Stevenson
Estimating the term…
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. Means is provided which is connected to the photosensitive means for operating the lifting equipment whereby the outer end of the boom structure and the workman's platform can be moved with respect to the support structure.
In a lifting equipment, a support structure, a boom structure movably mounted on said support structure, a workman's platform carried by the boom structure, the boom structure including means for electrically insulating the workman's platform from the support structure, a source of light electrically insulated from said workman's platform, a control mechanism accessible from the workman's platform, means for supplying light from said source to said control mechanism, at least one flexible light guide means carried by the boom structure and coupled to the control mechanism, said control mechanism having control means whereby upon operation of said control means light from the source can be selectively introduced into said flexible light guide means, photosensitive means for sensing when light is introduced into said light guide means and motive means connected to said photosensitive means for operating the lifting equipment whereby the outer end of the boom structure and the workman's platform can be moved relative to the support structure.
In a lifting equipment, a support structure, a boom structure movably mounted on said support structure, a workman's platform carried by the boom structure, the boom structure including means for electrically insulating the workman's platform from the support structure, a source of light, a control mechanism accessible from the workman's platform, means for supplying light from said source to said control mechanism having a plurality of apertures therein and wherein said source of light is positioned so that light from said source passes through said apertures, at least one light guide means carried by the boom structure and coupled to the control mechanism for each of said apertures, said control mechanism having control means for moving said light guide means into and out of registration with the associated aperture, photosensitive means for sensing when light is introduced into said light guide means and motive means connected to said photosensitive means for operating the lifting equipment whereby the outer end of the boom structure and the workman's platform can be moved relative to the support structure.
Dependencies are inferred from the claim text.