Emergency system for stopping a band blade of a cutting apparatu

Details Emergency system for stopping a band blade of a cutting apparatu Emergency system for stopping a band blade of a cutting apparatu

1977-04-15

1978-10-03

Schran, Donald R.

Cutting

With randomly actuated stopping means

83 621, 192129A, B27G 1900

Patent

active

041177525

ABSTRACT:
An emergency system for stopping the endless band blade reeved around a plurality of pulleys rotatably mounted on the base of a cutting apparatus. The system has a bearing rotatably mounted on the base and held in contact with the band blade at all times and an amplifier electrically connected to the band blade by the bearing. When the human body comes into contact with the band blade, the electric charge potantial of the body is amplified by the amplifier and energizes relays which interrupt the current supply to the motor for driving the band blade and, at the same time, actuate an electromagnetic brake and an electromagnetic clamp brake to brake the pulley coupled to the motor and the band blade to immediately stop the band blade.

REFERENCES:
patent: 1927203 (1933-09-01), DeGroot
patent: 3595132 (1971-07-01), Thacker
patent: 3785230 (1974-01-01), Lokey
patent: 4026177 (1977-05-01), Lokey

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