Claims
- 1. A liquid shut-off system, comprising:
- a solenoid valve;
- said valve having means for couplingly interpositioning thereof in a liquid conduit;
- a source of electrical power;
- power lines electrically coupling said solenoid valve with said power source; and
- means interpositioned in at least one of said power lines for inhibiting and permitting a flow of electrical power between said source and said solenoid valve; wherein
- said power flow inhibiting and permitting means comprises a float switch;
- said switch comprises (a) a shell, (b) a pivot pin fixed in said shell and in traverse thereof, (c) a sleeve rotatably encompassing an intermediate portion of said pin, (d) a buoyant element coupled at one end thereof to said sleeve, and (e) a liquid switch carried by said element;
- said power lines are coupled to said liquid switch;
- said shell has an unapertured top, and a continuous wall depending from said top; and
- said wall has only (a) a pair of apertures in which said pin is fixed, and (b) a third aperture through which said power lines pass.
- 2. A liquid shut-off system, according to claim 1, wherein:
- said liquid switch is a mercury switch.
- 3. A liquid shut-off system, according to claim 1, wherein:
- said buoyant element comprises a body of foam plastic.
- 4. A liquid shut-off system, according to claim 1, further including:
- means interposed in at least one of said power lines for producing a sensible signal of the operational status of the system.
- 5. A liquid shut-off system, according to claim 4, wherein:
- said signal producing means comprises an electrical lamp.
- 6. A liquid shut-off system, according to claim 1, further including:
- means interposed in one of said power lines which, responsive to a flow of power between said source and said solenoid valve, which produces a sensible signal of liquid shut-off.
Parent Case Info
This is a division of application Ser. No. 07/316,661, filed on 02/28/89.
US Referenced Citations (11)
Divisions (1)
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Number |
Date |
Country |
Parent |
316661 |
Feb 1989 |
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