Boots – shoes – and leggings
Patent
1989-12-22
1991-02-26
Evans, Arthur G.
Boots, shoes, and leggings
364518, G06F 1500
Patent
active
049966510
ABSTRACT:
A cutting instrument improvement for a computer controlled X-Y plotter comprising an electric motor having a housing and a rotor mounted for rotation about an axis fixed with respect to the housing at a relatively high speed in response to the connection of the motor with a source of electric current. An annular member is mounted on the motor housing for cooperating with the instrument receiving and holding mechanism to enable the latter to hold the housing in fixed centered relation on the instrument carrying member of the plotter for controlled movement with the instrument carrying member into an inoperative position and biased movement with the instrument carrying member into an operative position. A cutting tool is detachably fixed to the rotor for rotation therewith and has a sharp point disposed on the rotational axis when the instrument carrying member is in the operative position for relative X and Y axis movements with respect to a laminated sheet received and controlled by the laminated sheet receiving and controlling mechanism of the plotter. An adjustable spring assembly preferably containing the opposed springs, acts between the housing and the carriage to resiliently support a selected portion of the weight of the motor and tool on the carriage.
REFERENCES:
patent: 3942411 (1976-03-01), Gerber
patent: 4367588 (1983-01-01), Herbert
patent: 4467525 (1984-08-01), Logan et al.
patent: 4654956 (1987-04-01), Reed et al.
patent: 4686540 (1987-08-01), Leslie et al.
patent: 4794408 (1988-12-01), Niemeyer
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