Abstract: A portable exercising apparatus for a supine user has an open ended inwardly tapered member with a block member inside, the position of which is adjustable. The block member has a channel which provides a passage for a pair of ropes frictionably engageable between the tapered and block members which frictional engagement is variable because the position of the block member is adjustable. The ends of the ropes emerging from one end of the channel, out of the tapered member, each have a hand grip, while the other ends of the pairs of ropes are joined to form a pair of loops slidably engaged in a tube which provides for adjustment of the length of the loops. A pair of bands are slidably secured to both loops by a sleeve, these bands providing containment for the feet of the user. Preferably the tapered member is made of a material having a high heat conductivity and the block member of a material having low heat conductivity this minimises the temperature rise due to friction.

Abstract: A valve structure has a body with an inlet, an outlet and an intermediate by pass aperture. A pair of identical check valves are located in the body, one to each side of the aperture. The check valve nearest the inlet has a slidable housing, movable to cover the aperture, biased away from the fixed housing of the second check valve by a spring. The check valves are closable by individual springs in the direction of the inlet but the individual springs are stronger than the spring separating the housings.

Abstract: A back flow preventer valve has an annular resilient diaphragm secured to the valve body between the inlet and outlet valves; the diaphragm supports an annular wall member which closes off a vent. In the event of back flow, the pressure on the membrane raises the annular wall from the vent to open the latter and the back flow does not cause contamination. The feature of the valve is a seal formed by the valve body and the annular wall engaging in the event of diaphragm failure, thus ensuring that the back flow travels through the vent.

Abstract: A clip for securing wall panels and the like to frame members is provided which has a substantially flat T-shaped portion. The vertical leg of the T has a pointed tang extending toward the crosspiece and a pair of locating arms extending laterally in parallel substantially normal of the main plane of the vertical leg to bear upon the rear surface of the wall panel. The crosspiece is bent and provided with a plurality of points extending in parallel to the locating arms.

Abstract: The invention relates to a regulating drive for a thermostatically controlled feed member, especially the shaft of a heating valve, having a pivotable, spring-loaded actuating lever carrying a control element, preferably an expansion-material element, the operating member of the said control element being stationary and the mobile element being supported on the actuating lever, characterized in that the control element is mounted pivotably on the actuating lever.

Abstract: A pressure reducer has a housing with an inlet and an outlet. A valve disc is located in the housing and a valve stem reciprocally and sealably moves in the valve disc with the outer end secured to a resilient diaphragm. The inner end of the valve stem extends into the inlet and is secured to a tubular closure member which is sealingly positioned in the inlet and is engageable with the valve disc. The surface of the tubular member subjected to pressure in the housing is adpated to equal the combined subjected to opposed pressure surfaces of the tubular member in the inlet and the end of the valve stem to which it is secured. Screens are provided around the tubular member.

Abstract: A thermostatic valve comprises a housing having a valve seat and opposed openings in its wall for circulating coolant; a spring surrounds the housing and a valve plate is positioned for abutment against and retraction from the seat with the valve plate supporting a thermostatic operating element which bears against the inner surface of the housing to activate the valve plate depending on the temperature of the coolant. The valve plate has elastic arms, each arm having a free end to interfit into one of the opposed openings in the housing. The valve plate is assembled with the housing by force fitting the elastic arms into the openings and a compressive spring surrounding the housing is held in position between the protruding flanks of the housing and the outwardly extending projection of the arms in the openings.