Woodworking – Process – Mechanical cutting or shaping
Patent
1988-04-27
1989-04-04
Bray, W. Donald
Woodworking
Process
Mechanical cutting or shaping
83471, 834712, 144134A, 144117R, 144253G, 144286R, 144287, 144363, 144253J, 269236, 269249, 269203, 269303, B27C 900, B27B 2510
Patent
active
048176931
ABSTRACT:
An extension table for a machine tool of the type that includes a machine table that defines a reference plane includes a rigid, straight beam having a lower surface. A ledge is mounted to the lower surface of an outer portion of the beam to extend outwardly from at least one side of the beam, and this ledge defines a continuous upper surface which is substantially coplanar with the lower surface of the beam. The inner portion of the beam is mounted on the machine table with the beam positioned above the machine table such that the outer portion of the beam is cantilevered from the machine table with the lower surface of the beam substantially coplanar with the machine table. The outer portion of the beam is then supported against deflection by a support leg. The beam is sufficiently rigid to ensure that the upper surface of the ledge is substantially coplanar with the machine table. In certain applications the beam is preferably divided into two or more separate beam sections which are held together releasably by coupling elements. A center of one of the beam sections may be affixed to a conventional guide fence of the machine tool to move the extension table laterally across the machine table with the guide fence.
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