Multiple head gang saw with simplified, accurate displacement tr

Details Multiple head gang saw with simplified, accurate displacement tr Multiple head gang saw with simplified, accurate displacement tr

1987-08-17

1990-03-20

Yost, Frank T.

Cutting

With means to convey work relative to tool station

Cut made parallel to direction of and during work movement

835083, 83575, B27B 534

Patent

active

049091123

ABSTRACT:
A multiple head gang saw has a plurality of moveable saw heads (12, 14) providing variable width cutting, and a single magnetostrictive displacement transducer (40) sensing displacement of all of the saw heads. The transducer sender unit (42) is mounted to a transverse cross beam (10), and a magnetostrictive rod (44) extends from the sender unit along and parallel to the cross beam. A plurality of pairs of electromagnets (62, 64, 87, 89) are mounted to respective saw heads proximate the magnetostrictive rod. Switching circuitry (116) selectively energizes a chosen electromagnet pair and de-energizes the remaining electromagnet pairs such that only the chosen electromagnet pair generates a magnetic field interacting with the signal in the rod from the sender unit, such that the displacement transducer indicates the distance from the sender unit to the chosen electromagnet pair and its respective saw head along the cross beam.

REFERENCES:
patent: 1802514 (1931-04-01), Johnson
patent: 2507644 (1950-05-01), Peters
patent: 3786705 (1974-01-01), Dorfel
patent: 3992614 (1976-11-01), Buss
patent: 4323098 (1982-04-01), Suzuki et al.
patent: 4570518 (1986-02-01), Burmeister et al.
"Jenkins 191 Slat Bed Saw", Jenkins a division of Kohler General Corp., Sheboygan Falls, Wisc.
"Series DCTM Precision Non Contacting Linear Displacement Transducer System", Temposonics Incorporated, Plainview, N.Y.

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