Advancing material of indeterminate length – By intermittent material-mover – Including material abutment
Patent
1981-11-23
1984-07-31
Christian, Leonard D.
Advancing material of indeterminate length
By intermittent material-mover
Including material abutment
226 94, 198619, B65H 1726, B65G 1544
Patent
active
044625294
ABSTRACT:
A linear accelerator system for linearly advancing an electrically conductive, elongate workpiece, such as tubing, along its longitudinal axis toward a cutoff station or the like includes a helically configured electrical coils concentrically disposed around the workpiece for inducing an electromagnetic field which imposes an axial force on the workpiece. An adjustable stop assembly engages one end of the workpiece to allow selection of the length to be cut. A switch operated by the stop assembly produces a first control signal for controlling a relay which deenergizes the coil; the relay reenergizes the coil in response to a second control signal produced by another switch which senses the completion of the cutoff operation. Sleeves removably mounted on the coil to accommodate workpieces having various diameters. In lieu of the stop assembly, a length encoder may be optionally employed in combination with the accelerator or a separate retarding device to control feed length.
REFERENCES:
patent: 1441250 (1923-01-01), Smith
patent: 2633625 (1953-04-01), Romans et al.
patent: 3616978 (1971-11-01), Haslam
patent: 3965378 (1976-06-01), Liebe et al.
Alpha Industries Inc.
Christian Leonard D.
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