Thread monitoring switch for textile machines having magnet bias

Details Thread monitoring switch for textile machines having magnet bias Thread monitoring switch for textile machines having magnet bias

1976-04-14

1978-02-21

Scott, James R.

Electricity: circuit makers and breakers

Special application

Running length, web or strand actuated

28188, 57 81, 66163, 242 37R, B65H 2514

Patent

active

040754456

ABSTRACT:
A filament supplied to a textile machine is held under tension by a thread mounted on a weighted or otherwise biased lever which trips a switch to arrest the machine upon rupture of the filament. In normal operation, the lever is held against a stop by the tension of the thread supplemented by the force of a magnet whose attraction diminishes rapidly over the swing range of the lever, the biasing force slightly exceeding the magnetic force in the normal lever position to prevent oscillations in response to minor fluctuations in filament tension but to initiate a rapid cutoff in the event of a break.

REFERENCES:
patent: 2734334 (1956-02-01), Saunders
patent: 3253269 (1966-05-01), Ratti
patent: 3438188 (1969-04-01), Boggs
patent: 3701247 (1972-10-01), Rehn et al.

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