Shut-down apparatus for conveyor belts in underground mines

Details Shut-down apparatus for conveyor belts in underground mines Shut-down apparatus for conveyor belts in underground mines

1976-12-06

1978-08-01

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250226, G01D 2104

Patent

active

041045181

ABSTRACT:
An improved manually-operated, emergency shutdown apparatus for a motor-driven conveyor belt in an underground mine. The apparatus comprises a laser beam transmitter disposed at one of the ends of the conveyor belt and laterally spaced from one of the sides of the belt for generating a laser beam in a direction parallel to the longitudinal axis of the conveyor belt within reaching distance of a person riding on the belt. A laser light beam receiver is disposed at the opposite end of the conveyor belt and is coupled to the drive mechanism for the conveyor belt for receiving the laser beam generated by the transmitter and controlling movement of the conveyor belt in response to manual interruption of the laser beam by a person riding on the belt. The beam transmitter and receiver are arranged with respect to the conveyor belt so that the direction of transmission of the laser beam from the transmitter to the receiver is opposite the direction of movement of the conveyor belt.

REFERENCES:
patent: 2495249 (1950-01-01), Gilbert
patent: 3335285 (1967-08-01), Gally et al.

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