Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1976-06-04
1977-11-15
Lanham, C.W.
Metal working
Method of mechanical manufacture
Assembling or joining
29447, 29455R, 29DIG35, B23P 1102
Patent
active
040578917
ABSTRACT:
An X-ray apparatus including a telescopic column support comprising concentrically positioned tubular sections nested one within another. Each of the sections except the innermost section has three guide bars triangularly spaced on the inner surface. Each section except the outermost section has rollers on the outer surface cooperating with the adjacent guide bars of the surrounding section. The guide bars cooperate with the rollers in a generally circumferential direction rather than radially of the tubular members. Mounting plugs held in apertures of the telescopic sections by an interference fit locate the guide bars and rollers and provide mounting surfaces therefor. The plugs are initially insertable into the apertures with a clearance fit, when an appropriate temperature differential is established between the plugs and sections. A pulley wheel outside a fixed column section and carried by the first movable section supports a loop of control and power cables to take up and release the cables relative to a fixed location on a subsequent section, and at a rate equal to the change in length of the column, thereby avoiding slack in the cable during extension and retraction of the column.
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Amor, Jr. William H.
Steffek Robert J.
Crane Daniel C.
Lanham C.W.
Picker Corporation
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