Abstract: A hydropneumatic monitoring device in which a hydraulic fluid passageway is controlled by a piston and plunger spring biased in one direction and shiftable by air pressure in opposition to the bias for aligning a passageway-connecting bypass in the plunger with the passageway which is intersected by the plunger. Air pressure metered through the piston passes to an air passage. Air pressure failure or blockage in the air passage cause deviation of the piston and plunger from a state of open passageway equilibrium, for blocking the passageway.

Abstract: A cyclical lubricant feeder utilizing series spool valves to dispense measured quantities of lubricant to dispensing outlets from a common feed source with a plurality of the spool valves arranged in series in valve block assemblies which in turn are in series with one another whereby dispensing through the outlet for each spool valve in a block assembly is in progression with the other outlets from the spool valves in the valve block assembly is provided with a control valve controlling inlet and outlet flow to the valve block assembly bypassing flow from the inlet to the outlet when all of the valves in the block have been shifted to one side and bypassing flow from the outlet to the inlet upon reverse lubricant flow to the block only when all of the valves in the block have been shifted to the other side.

Abstract: A cyclic lubricant distributor valve has an inlet block unit, an end block unit and at least three intermediate block units. Each of the intermediate block units has a bore, a spool movable in the bore and at least one lubricant outlet. A series of ports and passages are formed in the various block units to provide for cyclic operation of the distributor valve. Each of the intermediate block units is formed of a base member, in which the outlet (or outlets) is formed, and a separate and separable spool member, in which a bore is formed containing a movable spool. Through bolts connect the inlet block unit, the end block unit and the base members of the intermediate block units in fixed assembly. Other bolts connect each of the spool members in fixed assembly only with its corresponding base member.

Abstract: A single line lubricant reversing feeder for use in a centralized lubricating system, the feeder having a valving piston and a metering piston, by virtue of the movement of which a measured portion of the lubricant supplied to the feeder is delivered to a point of use such as a bearing, and the remaining portion is directed to the next succeeding feeder in the system. The feeder is arranged so that only a single check valve is required to accomplish the foregoing.

Abstract: A lubrication device employing a reciprocable plunger, as the actuating member, which is driven by a rotatable cam member through a pivoted rocker arm engaged with the plunger and having roller means engaging the cam, with the axis of the plunger, respective pivotal axes of the cam, arm and roller means, and line contacts between the roller and cam and between plunger and arm being so related that actuating forces are transmitted from the cam to the plunger substantially on the axis of the plunger, substantially eliminating undesirable lateral forces on component parts and enabling the use of simple bearing structures for the cam shaft. Operation is further improved by a novel disposition of valve means in the lubricant supply line.

Abstract: An electrical cable of conventional or retractable helical coil form which is relatively small in diameter and sufficiently flexible to be used to advantage on a tractor-trailer to connect the power supply on the tractor with the electrical system carried by the trailer has a polymeric sheath, an insulated 10 gauge stranded conductor substantially coaxial with the sheath, four to six insulated stranded 12 gauge conductors substantially evenly spaced about the periphery of the 10 gauge conductor, a plurality of uninsulated stranded conductors of 14 gauge disposed between the smaller insulated conductors, filler material filling the spaces between the conductors and preferably a plastic film helically wound about the conductors. The 12 and 14 gauge conductors are helically wound about the 10 gauge conductor. The assembly of conductors, filler and plastic film combine to form a cable having a substantially circular cross-section and substantially fill the sheath.