A preformed masonry building block having a preformed insulating insert disposed in the cavity therein. The inserts are of molded expandable polystyrene or the like and are characterized by cut-away portions for finger access to marginal walls of the block cavities and by elongated vertical openings in the inserts for enhanced cross sectional compressibility. The cross-sectional dimensions of the blocks vary substantially requiring such insert compressibility. In one form, an insert has a four-s...

A compact valve block for an I.S. glassware forming machine comprises two rows of valve combinations each of which comprises a pilot-operated poppet valve under the control of a solenoid-operated pilot valve which directs pilot air to the poppet valve, and a plenum chamber, preferably an exhaust chamber, which is located adjacent to all the valve combinations and which is common to either all the supply ports or, preferably, all the exhaust ports of all the poppet valves.

Disclosed is an open center crown block pivotally mounting a pair of sheaves on each of the opposite sides of the well centerline. On one side of the crown block, there is pivotally mounted a crossover sheave for transferring the drilling line from one side of the well centerline to the opposite side thereof. Opposite the crossover sheave is a fastline sheave for aligning the drilling line from the draw works vertically above the travelling block. On another side of the frame, there is provided ...

An ankle block for joining a leg prosthesis to a foot prosthesis includes a generally cylindrical member formed of rigid foam material, and a metal or wood insert molded in place in the lower end of the cylindrical member. The insert includes flanges which anchor it firmly in the foam, and a hole extending axially therethrough for receiving and anchoring a bolt from the prosthetic foot. An upper cylindrical passage extends from the upper end of the block to the insert, and a lower cylindrical pa...

The invention provides a building block having a shape derived from that of a cuboid, wherein the upper corners of the front face (1) are cut-away and a recess communicates between the bottom face (2) and the rear face (3). Preferably, the sum of the depth to which the said corners are cut away backwards from the front face and the depth to which the recess extends forward from the back face is greater than the depth of the block. Thus, when the blocks are built into a wall in the conventional m...

A terminal block having a housing, a connector panel rotatably mounted between the side walls of the housing between first and second positions, a latch mechanism for releasably retaining the panel in its first or second position and a front door pivotally secured to the housing.

A detonator block which permits the explosion of a primary detonator and the resultant explosion of an associated primary detonating cord, but which at the same time prevents damage to or explosion of an adjacent secondary detonator and its associate secondary detonating cord.

A block valve (10) for selectively establishing and selectively blocking communication between a pressurized fluid supply (30), a fluid actuated device (DHSV) and a reservoir (35). The valve comprises a valve body (41, 42) with an inlet (81), an outlet (82) and a bleed port (83) and first and second piston-type plunger elements (61, 71) slidably mounted in piston chambers (51, 52) formed in the bore (43, 45) of the valve body. The second plunger element (71) is slidably mounted on the first plun...

A cylinder block comprises bearing sections for supporting a rotatable shaft disposed within a crankcase inner chamber, the bearing sections being spaced from each other and from main bearing sections for supporting a crankshaft; and generally cylindrical hollow beam members each of which is interposed between the two opposite bearing sections in a manner to cover the rotatable shaft supported by the bearing sections, the hollow beam members being aligned in the direction of the row of cylinder ...

Disclosure is made herein of a bite block which is usefully employed in conjunction with endoscopy, bronchoscopy, endotracheal intubation and like medical-surgical procedures.