Fastener selection system

Elongated-member-driving apparatus – With control means responsive to sensed condition – Work-responsive

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227 69, 227 76, 340347M, B21J 1528

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active

042202752

ABSTRACT:
An automatic fastener selection apparatus for sensing the composite thickness of a plurality of workpieces, determining which one of a plurality fastener sizes is appropriate for joining the workpieces together, and generating a dispensing signal representing the appropriate fastener size. Sensing apparatus provides a signal which is a function of the composite thickness of the workpieces, and this signal is processed by a selection circuit. The selection circuit generates an output signal in response to the signal from the sensing apparatus, and this output signal represents only one of a plurality of different fastener sizes. A triggering circuit then receives the output signal and generates the dispensing signal in response thereto. The apparatus may include a switching mechanism associated with the sensing apparatus and cooperating with the triggering circuit to generally synchronize the updating of the output signal and the generation of the dispensing signal with the completion of a thickness sensing operation. The apparatus may further include circuitry for facilitating the calibration of the selection circuit and a visual display for indicating the output signal, and the selection circuit may include enabling circuitry responsive both to the switching mechanism and to a manually-operable switch for enabling the triggering circuit.

REFERENCES:
patent: 3030832 (1962-04-01), Filangeri et al.
patent: 3041469 (1962-06-01), Ross
patent: 3573801 (1971-04-01), Cohen et al.
patent: 3594766 (1971-07-01), Gilbert
patent: 3843103 (1974-10-01), Sekine et al.
patent: 3949170 (1976-04-01), Shionoya

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