GB190414211A - Improvements in Valves for Regulating and Maintaining the Temperature of Water and other Liquids or Fluids in Tanks or Vessels. - Google Patents

Abstract

14,211. Day, P. J. C., and Steam Fittings Co. June 23. Lift valves; spindles. - Relates to thermostaticallyoperated valves for regulating and maintaining the temperature of water and other liquids and fluids in tanks or vessels. A flexible chamber o containing an expansible fluid, such as alcohol, acts on the valve y through a rod, piston, or plunger v, which moves fluid - tight in a cylindrical or other passage extending bet ween the tank in which the chamber o is located and the valve casing. The plunger v engages with the screwthreaded portion of a plunger q and is rotated relatively thereto, when, for instance, the apparatus is adjusted, to operate at different temperatures, by turning a spindle 9. In the arrangement shown in Fig. 1, the chamber o, which is preferably of cylindrical form with annularly-corrugated ends or diaphragms, is held in a frame or cage between a detachable cover or spider n and the head of the plunger q. The plunger q, which is pressed against the chamber o by a spring, is prevented from rotating in the central passage of a cylinder h by any means, such as a longitudinal slot on the plunger q with which engages a projection t on the inner surface of the cylinder h. The lower end of the piston v has an extension w which engages with a recess in the valve y. The valve is allowed to oscillate slightly so as to fit its seat accurately by providing the extension of the piston v with a transverse pin which fits loosely in transverse slots in the sides of the recess of the valve. An axial extension 4 on the underside of the valve is also provided with a transverse pin which engages a transversely-slotted socket formed at the end of the spindle 9. This spindle 9 passes through a removable plug so that the plug and spindle may be removed from the valve casing without disturbing the valve. Fig. 2 shows a modification in which there is only one loose joint between the spindle 9 and the piston v<1>. The valve y has a central opening through which passes the extension 4 of the piston v<1>. The piston v<1> has a shoulder adapted to bear against a socket formed in the back of the valve. The expansible chamber 0<1> is clamped at its edge between the shoulder of a ring 15, which is formed integral with the cover, and a shoulder of the frame l<1>, which is closed on its underside. The cover is of convex form, and is not in contact with the chamber o<1>.