Combination switch and valve device

Claim 2

A combination high pressure switch-low pressure switch and high pressure relief valve control device comprising: an electrically conductive housing adapted to be electrically grounded on mounting in a pressure control installation, low pressure switch means and high pressure switch means mounted in said housing and operatively electrically connected in series thereof for adaptation in a control circuit, said low pressure switch means including biasing means for urging opening thereof, force transmitting means mounted in said housing having pressure sensing means adapted to be exposed to a pressure to be sensed for normally holding said low pressure switch means closed and responding to pressures below a predetermined low pressure value to effect opening of said low pressure switch means by its biasing means, said high pressure switch means including biasing means for urging closure thereof, said force transmitting means being further responsive to pressure on said pressure sensing means above a predetermined least extreme high pressure value to open said high pressure switch means against its biasing means whereby said high and low pressure switch means cooperatively provide an electrically conductive path to said housing only between said predetermined low pressure value and least extreme high pressure value, and high pressure relief valve means mounted in said housing having biasing means for urging closure thereof, said high pressure relief valve means further having pressure sensing means adapted to be exposed to the pressure to be sensed for responding to pressures above a predetermined most high pressure value substantially higher than least extreme pressure value to open said high pressure relief valve means to provide extreme high pressure relief.

Claim 3

A combination high pressure switch-low pressure switch and high pressure relief valve control device comprising: an electrically conductive housing adapted to be electrically grounded on mounting in a pressure control installation, low pressure switch means and high pressure switch means mounted in said housing and operatively electrically connected in series thereof for adaptation in a control circuit, said low pressure switch means including biasing means for urging opening thereof, force transmitting means mounted in said housing having pressure sensing means adapted to be exposed to a pressure to be sensed for normally holding said low pressure switch means closed and responding to pressures below a predetermined low pressure value to effect opening of said low pressure switch means by its biasing means, said high pressure switch means including biasing means for urging closure thereof, said force transmitting means being further responsive to pressure on said pressure sensing means above a predetermined least extreme high pressure value to open said high pressure switch means against its biasing means whereby said high and low pressure switch means cooperatively provide an electrically conductive path to said housing only between said predetermined low pressure value and least extreme high pressure value, and high pressure relief valve means mounted on said force transmitting means, said high pressure relief valve means including biasing means for urging closure thereof, said high pressure relief valve means further including pressure sensing means adapted to be exposed to the pressure to be sensed for responding to pressures above a predetermined most extreme high pressure value substantially higher than least extreme pressure value to open said high pressure relief valve means against its biasing means to provide extreme high pressure relief.

Claim 4

A combination high pressure switch-low pressure switch and high pressure relief valve control device comprising: an electrically conductive housing adapted to be electrically grounded on mounting in a pressure control installation, low pressure switch means and high pressure switch means mounted in said housing and operatively electrically connected in series thereof for adaptation in a control circuit, said low pressure switch means including biasing means for urging opening thereof, force transmitting means mounted in said housing having pressure sensing means adapted to be exposed to a pressure to be sensed for normally holding said low pressure switch means closed and responding to pressures below a predetermined low pressure value to effect opening of said low pressure switch means by its biasing means, said high pressure switch means including biasing means for urging closure thereof, said force transmitting means being further responsive to pressure on said pressure sensing means above a predetermined least extreme high pressure value to open said high pressure switch means against its biasing means whereby said high and low pressure switch means cooperatively provide an electrically conductive path to said housing only between said predetermined low pressure value and least extreme high pressure value, and high pressure relief valve means mounted on said force transmitting means, said high pressure relief valve means including biasing means for urging closure thereof, said high pressure relief valve means further including pressure sensing means adapted to be exposed to the pressure to be sensed for responding to pressures above a predetermined most extreme high pressure value substantially higher than least extreme pressure value to open said high pressure relief valve means against its biasing means to provide extreme high pressure relief.

Claim 5

A combination high pressure switch-low pressure switch and high pressure relief valve control device comprising: an electrically conductive housing adapted to be electrically grounded on mounting in a pressure control installation, low pressure switch means and high pressure switch means mounted in said housing and operatively electrically connected in series thereof for adaptation in a control circuit, said low pressure switch means including biasing means for urging opening thereof, force transmitting means mounted in said housing having pressure sensing means adapted to be exposed through an open end of said housing to a pressure to be sensed for normally holding said low pressure switch means closed and responding to pressures below a predetermined low pressure value to effect opening of said low pressure switch means by its biasing means, said high pressure switch means including biasing means for urging closure thereof, said high pressure switch means further including actuator means extending through said low pressure switch means, said force transmitting means being further responsive to pressure on said pressure sensing means above a predetermined least extreme high pressure value to act on said actuator means to effect opening of said high pressure switch means against its biasing means whereby said high and low pressure switch means cooperatively provide an electrically conductive path to said housing only between said predetermined low pressure value and least extreme high pressure value, and high pressure relief valve means mounted in said housing on said force transmitting means, said high pressure relief valve means including biasing means for urging closure thereof, said high pressure relief valve means further including pressure sensing means integral with its biasing means adapted to be exposed to the pressure to be sensed through said open end of said housing for responding to pressures above a predetermined most high pressure value substantially higher than least extreme pressure value to open said high pressure relief valve means against its biasing means to provide extreme high pressure relief.

Claim 6

A combination high pressure switch-low pressure switch and high pressure relief valve control device comprising: an electrically conductive housing adapted to be electrically grounded on mounting in a pressure control installation, low pressure switch means and high pressure switch means mounted in said housing and operatively electrically connected in series thereof for adaptation in a control circuit, said low pressure switch means including biasing means for urging opening thereof, force transmitting means mounted in said housing having pressure sensing means adapted to be exposed through an open end of said housing to a pressure to be sensed for normally holding said low pressure switch means closed and responding to pressures below a predetermined low pressure value to effect opening of said low pressure switch means by its biasing means, said high pressure switch means including biasing means for urging closure thereof, said high pressure switch means further including actuator means extending through said low pressure switch means, said force transmitting means being further responsive to pressure on said pressure sensing means above a predetermined least extreme high pressure value to act on said actuator means to effect opening of said high pressure switch means against its biasing means whereby said high and low pressure switch means cooperatively provide an electrically conductive path to said housing only between said predetermined low pressure value and least extreme high pressure value, and high pressure relief valve means mounted in said housing on said force transmitting means, said high pressure relief valve means including biasing means for urging closure thereof, said high pressure relief valve means further including pressure sensing means integral with its biasing means adapted to be exposed to the pressure to be sensed through said open end of said housing for responding to pressures above a predetermined most high pressure value substantially higher than least extreme pressure value to open said high pressure relief valve means against its biasing means to provide extreme high pressure relief.

Claim 7

A pressure actuated switch assembly comprising housing means defining a cavity having an opening to admit a fluid under pressure, support means spanning said cavity and having an opening therethrough, separate movable switch means registered with said opening on each side thereof, an actuator pin telescoped in said opening and engaging at one end with one of said movable switch means, a floating spring disc engaging centrally thereof with the opposite end of said actuator pin, a floating substantially rigid disc having an opening therethrough telescoped on said actuator pin and engaging on opposite sides thereof with the other of said movable switch means and said spring disc at the outer periphery thereof, force transmitting means engaging said spring disc inboard the outer periphery thereof on the side opposite said rigid disc and subject to movement toward said rigid disc determined by the fluid pressure, and said apparatus so constructed and arranged that under fluid pressure exerted on said force transmitting means said other movable switch means is first closed without substantial flexing of said spring disc with movement of said rigid disc to a stop position and then at a higher pressure said spring disc flexes by reaction of the stopped rigid disc to bodily move said actuator pin and open said one movable switch means.

Claim 8

A pressure actuated switch assembly comprising housing means defining a cavity having an opening to admit a fluid under pressure, support means spanning said cavity and having an opening therethrough, separate movable switch means registered with said opening on each side thereof, an actuator pin telescoped in said opening and engaging at one end with one of said movable switch means, a floating spring disc engaging centrally thereof with the opposite end of said actuator pin, a floating substantially rigid disc having an opening therethrough telescoped on said actuator pin and engaging on opposite sides thereof with the other of said movable switch means and said spring disc at the outer periphery thereof, force transmitting means engaging said spring disc inboard the outer periphery thereof on the side opposite said rigid disc and subject to movement toward said rigid disc determined by the fluid pressure, and said apparatus so constructed and arranged that under fluid pressure exerted on said force transmitting means said other movable switch means is first closed without substantial flexing of said spring disc with movement of said rigid disc to a stop position and then at a higher pressure said spring disc flexes by reaction of the stopped rigid disc to bodily move said actuator pin and open said one movable switch means.