Differential pressure switch

Claim 2

A differential pressure switch comprising a hollow body having an open end, a tubular bellows having a closed end and an open end, means securing the open end of the bellows to the interior of the body with the closed end being directed towards the open end of the body, means in said body for directing a first fluid to the interior of the bellows and a second fluid to the exterior thereof to have the differential pressure therebetween move the closed end of the bellows toward and away from the open end of the body, a cap secured to the body to close the open end thereof and having a head portion positioned within the body, electrical translating means secured on the cap on the opposite side of the head portion from the bellows, a second bellows mounted on the head portion to extend transversely to the movement of the first-mentioned bellows aNd actuating means engageable with the closed end and the second bellows for transmitting preselected movement of the closed end through the second bellows to the electrical translating means by radial distortion of the second bellows to thereby effect operation of the electrical translating means, in which the cap is secured to the body by a releasable connecting means, in which the connecting means includes means for relatively moving the cap with respect to the closed end of the bellows along the line of movement of the closed end to thereby enable adjustment of the position of the closed end of the bellows that operates the electrical translating means and in which the releasable connection includes a nut, cooperating threaded connectors on said nut and body and a flange formed on the cap and engageable by the nut.

Claim 3

A differential pressure switch comprising a hollow body having an open end, a tubular bellows having a closed end and an open end, means securing the open end of the bellows to the interior of the body with the closed end being directed towards the open end of the body, means in said body for directing a first fluid to the interior of the bellows and a second fluid to the exterior thereof to have the differential pressure therebetween move the closed end of the bellows toward and away from the open end of the body, a cap secured to the body to close the open end thereof and having a head portion positioned within the body, electrical translating means secured on the cap on the opposite side of the head portion from the bellows, a second bellows mounted on the head portion to extend transversely to the movement of the first-mentioned bellows and actuating means engageable with the closed end and the second bellows for transmitting preselected movement of the closed end through the second bellows to the electrical translating means by radial distortion of the second bellows to thereby effect operation of the electrical translating means, in which the cap is secured to the body by a releasable connecting means, in which the connecting means includes means for relatively moving the cap with respect to the closed end of the bellows along the line of movement of the closed end to thereby enable adjustment of the position of the closed end of the bellows that operates the electrical translating means, in which there is compressible sealing means between the cap and the body and in which the releasable connection causes compression to be exerted on the sealing means to effect a seal.

Claim 4

A differential pressure switch comprising a hollow body having an open end, a tubular bellows having a closed end and an open end, means securing the open end of the bellows to the interior of the body with the closed end being directed towards the open end of the body, means in said body for directing a first fluid to the interior of the bellows and a second fluid to the exterior thereof to have the differential pressure therebetween move the closed end of the bellows toward and away from the open end of the body, a cap secured to the body to close the open end thereof and having a head portion positioned within the body, electrical translating means secured on the cap on the opposite side of the head portion from the bellows, a second bellows mounted on the head portion to extend transversely to the movement of the first-mentioned bellows and actuating means engageable with the closed end and the second bellows for transmitting preselected movement of the closed end through the second bellows to the electrical translating means by radial distortion of the second bellows to thereby effect operation of the electrical translating means, in which the cap is secured to the body by a releasable connecting means, in which the connecting means includes means for relatively moving the cap with respect to the closed end of the bellows along the line of movement of the closed end to thereby enable adjustment of the position of the closed end of the bellows that operates the electrical translating means, in which there is compressible sealing means between the cap and the body and in which the releasable connection causes compression to be exerted on the sealing means to effect a seal.

Claim 5

A differential pressure switch comprising a hollow body having an open end, a tubular bellows having a closed end and an open end, means securing the open end of the bellows to the interior of the body with the closed end being directed towards the open end of the body, means in said body for directing a first fluid to the interior of the bellows and a second fluid to the exterior thereof to have the differential pressure therebetween move the closed end of the bellows toward and away from the open end of the body, a cap secured to the body to close the open end thereof and having a head portion positioned within the body, electrical translating means secured on the cap on the opposite side of the head portion from the bellows, a second bellows mounted on the head portion to extend transversely to the movement of the first-mentioned bellows and activating means engageable with the closed end and the second bellows for transmitting preselected movement of the closed end through the second bellows to the electrical translating means by radial distortion of the second bellows to thereby effect operation of the electrical translating means, in which the cap is secured to the body by a releasable connecting means, in which the connecting means includes means for relatively moving the cap with respect to the closed end of the bellows along the line of movement of the closed end to thereby enable adjustment of the position of the closed end of the bellows that operates the electrical translAting means, in which the head portion includes stop means positioned to be engaged by the closed end to limit movement thereof after the translating means operating position and in which the stop means is positioned to limit the movement of the actuating means by the closed end after operation by the closed end.

Claim 6

A differential pressure switch comprising a hollow body having an open end, a tubular bellows having a closed end and an open end, means securing the open end of the bellows to the interior of the body with the closed end being directed towards the open end of the body, means in said body for directing a first fluid to the interior of the bellows and a second fluid to the exterior thereof to have the differential pressure therebetween move the closed end of the bellows toward and away from the open end of the body, a cap secured to the body to close the open end thereof and having a head portion positioned within the body, electrical translating means secured on the cap on the opposite side of the head portion from the bellows, a second bellows mounted on the head portion to extend transversely to the movement of the first-mentioned bellows and activating means engageable with the closed end and the second bellows for transmitting preselected movement of the closed end through the second bellows to the electrical translating means by radial distortion of the second bellows to thereby effect operation of the electrical translating means, in which the cap is secured to the body by a releasable connecting means, in which the connecting means includes means for relatively moving the cap with respect to the closed end of the bellows along the line of movement of the closed end to thereby enable adjustment of the position of the closed end of the bellows that operates the electrical translAting means, in which the head portion includes stop means positioned to be engaged by the closed end to limit movement thereof after the translating means operating position and in which the stop means is positioned to limit the movement of the actuating means by the closed end after operation by the closed end.

Claim 7

The invention as defined in claim 3 in which there is a second cap secured to close the other end of the body and having a head portion, second electrical translating means secured on the second cap on the opposite side of the second head portion from the bellows, a third bellows mounted on the second head portion to extend transversely to the movement of the first-mentioned bellows and second actuating means engageable with the closed end and the third bellows for translating preselected movement of the closed end through the third bellows to the second electrical translating means by radial distortion of the third bellows to thereby effect operation of the second electrical translating means and in which the head portion of the second cap carries stop means for limiting movement of the closed end and actuating means after operation of the second electrical translating means.

Claim 8

The invention as defined in claim 4 in which the second cap is secured to the body by independently operable releasable connecting means.