Electronic brake for lens generator device

Details Electronic brake for lens generator device Electronic brake for lens generator device

1990-03-12

1991-07-09

Schmidt, Frederick R.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51106LG, 5116572, 82118, B24B 5504

Patent

active

050294164

ABSTRACT:
A lens generator device is provided with a dynamic electronic braking circuit for instantaneously interrupting operation of the lens generated under certain conditions to prevent injury to an operator. The lens generator includes a chamber structure having an access cover and having a power driven grinding tool therein. A photoelectric switch is mounted on the tailstock in confronting relation with the chamber structure cover and is operable when the cover is raised or when the tailstock is retracted to operate the dynamic braking circuit and instantaneously stop operation of the grinding tool.

REFERENCES:
patent: 4137677 (1979-02-01), Nedreski
patent: 4566226 (1986-06-01), Kimura
patent: 4680998 (1987-07-01), Council
patent: 4768308 (1988-09-01), Atkinson
patent: 4850152 (1989-07-01), Heynacher
patent: 4901478 (1990-02-01), Kane
patent: 4908997 (1990-03-01), Field
patent: 4947715 (1990-08-01), Council

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