Geometrical instruments – Scriber – Straight-line
Patent
1983-09-19
1985-11-19
Martin, Jr., William D.
Geometrical instruments
Scriber
Straight-line
33 32R, 269224, A41H 300
Patent
active
045533288
ABSTRACT:
Apparatus for lifting a cutter track guide or cloth alignment bar extending across the top surface of a cloth cutting table. On each side of the surface there is a section including a supporting frame in fixed relation to the surface, a lifting member near the frame and movable longitudinally, pivotally and substantially perpendicular to the surface, a guiding arrangement carried by the frame and in guiding contact with the lifting member, and a weight balancing arrangement carried by the frame and connected to the lifting member for applying thereto a force substantially equal and opposite to the weight associated with the track or bar acting on the lifting member. A force transmitting and equalizing arrangement includes a belt and pulley combination connected to the frame of each section and associated with each of the lifting members and with the track or bar. When a lifting force is applied to one of the lifting members, both act in unison to lift the track or bar in a direction away from the supporting surface and to return it while maintaining it parallel to the supporting surface. The pivotal movement of the lifting members allows adjustment of the angle of the track or bar extending across the surface.
REFERENCES:
patent: 1183674 (1916-05-01), Rock
Eastman Machine Company
Martin, Jr. William D.
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