Metal deforming – With randomly-actuated stopping – Manually controlled
Patent
1975-11-06
1976-09-07
Mehr, Milton S.
Metal deforming
With randomly-actuated stopping
Manually controlled
74612, B21B 3302, F16P 100
Patent
active
039787010
ABSTRACT:
A guard is disclosed for guarding the nip between a pair of rolls in a power roll mill to prevent the mill operator's fingers from being crushed between the rolls. The guard comprises an upstanding plate pivotally mounted transversely between the opposite side frame members of the rolling mill in front of the pair of rolls being guarded. The top of the guard is flat and is located adjacent and below the normal path for the infeed of a sheet of material being formed between the rolls in order that an operator's fingers which support the underside of the sheet will engage the guard and be prevented from entering the roll nip. The guard plate is depressibly supported at its opposite ends by a pair of upright tubular rocker arms which are pivoted at their base and are biased to a central neutral position. At least one microswitch is provided adjacent one of the rocker arms which is in electric circuit with an electric motor which drives the power rolls to turn the motor on and off. An actuator for the switch projects into contact with the rocker arm and is actuated by pivotal movement of the rocker arm to either side of its neutral position in order to open the microswitch and thus to stop the electric motor.
REFERENCES:
patent: 1651615 (1927-12-01), Morin
patent: 3498217 (1970-03-01), Kletti
Burden Alfred L.
Mehr Milton S.
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