Patent ID: 6236295
Filing Date: 2001-05-22
Classification: H01H

Abstract:
An explosion-proof, pressure responsive shut-off switch comprising:a body defining a first, gasoline vapor system pressure region and a second, electrical region, and a vapor and liquid impermeable wall therebetween,a magnet mounted in the first, gasoline vapor system pressure region for movement, in response to vapor pressure, between a first position spaced from said vapor and liquid impermeable wall and a second position relatively more closely adjacent said vapor and liquid impermeable wall, said magnet being mounted on a pivot arm, said pivot arm having an adjustable pivot for adjusting a ratio of movement of said magnet, relative to said vapor and liquid impermeable wall, to change in vapor pressure, anda reed switch mounted in the second, electrical region in proximity to said vapor and liquid impermeable wall, and adapted to open and close a vacuum pump switch in response to movement of said magnet between said first position and said second position.