Wire runout and splice detector for lead-making machines

Details Wire runout and splice detector for lead-making machines Wire runout and splice detector for lead-making machines

1992-12-21

1993-09-14

Braun, Leslie A.

192 clutches and power-stop control

Stop mechanism

Material control

192125F, 72 3, 72 5, 83 61, 226 11, 226 48, F16D 7100, B65H 6600

Patent

active

052440672

ABSTRACT:
A detector on a wire lead machine includes a pair of contacts biased into a normally closed position. The wire is fed between the contacts, keeping the contacts open, and the insulation on the wire prevents electrical conductivity between the contacts. If the wire runs out, the contacts close to shut off the machine. Additionally, a splice on the wire establishes an electrical path between the contacts and, again, the machine is shut off. The detector includes a detection circuit which generates a control signal. In the event a splice is passing through the contacts, the detection circuit generates a control signal having a relatively short time duration (as for example, 100 microseconds) and holds the signal for a sufficient time period (as for example, 500 milliseconds). This allows a suitable control means (which may include a microprocessor) to shut off the machine because of either wire runout or a splice on the wire, thereby preventing serious damage to the machine and maintaining productivity.

REFERENCES:
patent: 2101382 (1937-12-01), Donovan et al.
patent: 2263246 (1941-11-01), Morgan
patent: 3098576 (1963-07-01), Steward
patent: 3152740 (1964-10-01), Kindseth et al.
patent: 3429491 (1969-02-01), Windley
patent: 3854356 (1974-12-01), Okreglak
patent: 4206666 (1980-06-01), Ashton

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