초록 ▼

A detector for sensing and signalling leakage in a closed fluid system, the detector having inlet and outlet passages connected by parallel main and secondary channels. The main channel is provided with normally closed sealing means to prevent communication between the inlet and outlet passages, and

A detector for sensing and signalling leakage in a closed fluid system, the detector having inlet and outlet passages connected by parallel main and secondary channels. The main channel is provided with normally closed sealing means to prevent communication between the inlet and outlet passages, and the secondary channel is provided with an element that moves in response to a pressure differential across the secondary channel. The main channel sealing means opens in response to a threshold differential pressure between the inlet and outlet passages, the threshold for the main channel being high to allow flow only when fluid is intentionally passed through the detector. The threshold for the secondary channel is low to permit movement upon pressure differentials caused by leaks, the secondary channel movable means having magnetic flux associated with it to actuate reed switch when this means is moved by a pressure differential across the secondary channel.

대표청구항 ▼

Means for detecting leaks in a closed fluid system comprising: means comprising an inlet and outlet, and parallel main and secondary channels connecting said inlet and outlet, sealing means in said main channel normally urged to prevent fluid flow in the main channel between said inlet and outlet, s

Means for detecting leaks in a closed fluid system comprising: means comprising an inlet and outlet, and parallel main and secondary channels connecting said inlet and outlet, sealing means in said main channel normally urged to prevent fluid flow in the main channel between said inlet and outlet, said sealing means being movable to permit such flow in response to a first threshold pressure differential between said inlet and outlet, a sensing element with magnetic flux movably positioned in said secondary channel from a first position to a second position in response to a second threshold pressure differential applied between said inlet and outlet passages, said second pressure differential threshold being less than said first pressure differential threshold, and switch means adjacent said magnetic flux when said sensing element is in one of said first and second positions, said switch means being responsive to said magnetic flux for indicating when the sensing element is in said one position whereby such element occupies such position whenever said second pressure differential threshold is exceeded, whereby leakage downstream of the outlet causes a pressure drop across said secondary channel sufficient to move the sensing element to its second position. such movement being detected by the switch means.