Cutting – By tool reciprocable along elongated edge – With dynamic balancing or shock absorbing means
Patent
1985-07-19
1986-12-02
Yost, Frank T.
Cutting
By tool reciprocable along elongated edge
With dynamic balancing or shock absorbing means
74591, 83615, B27B 1906
Patent
active
046256091
ABSTRACT:
A scroll saw is disclosed having a yoke with upper and lower reciprocable arms terminating in upper and lower ends having a saw blade connected therebetween. A motor, with a horizontally extending drive shaft, is mounted on the base for the saw. A connecting rod is coupled eccentrically at one end to the drive shaft and at the other end to the lower arm of the yoke. A second shaft is rotatably mounted on the base parallel to the drive shaft and is driven by intermeshing gears on the shafts. First and second counterbalances are mounted on the shafts which rotate with the shafts in opposite directions. The counterbalances, each having a center of mass offset radially from an axis of the shaft, are positioned on the shafts so as to enhance or compound the inertial effects of the counterbalances in a vertical direction to cancel out the inertial effects of the reciprocating yoke, and so as to cancel the inertial effects of each other in a horizontal direction.
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The Eagle Precision Scroll Saw, Exclusive "C" Arm for Safety, manufactured by RBI Industries, Inc., Pleasant Hill, Mo., date unknown.
Delta International Machinery Corp.
Yost Frank T.
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