An 8-cylinder engine is converted to a 4-cylinder engine by disconnecting and removing four alternate firing order pistons and connecting rods, by attaching a counterweight to each crank shaft throw journal from which a connecting rod has been removed, by blocking intake ports with replacement gaskets having obstructions at the ports of the selected cylinders and by adding weights to the flywheel.

A louspeaker system having a woofer, tweeter and crossover network has a closed box resonance of 81.5 Hz which frequency is above the half-power point of 65 Hz of the system that includes active equalization of the vented box woofer in the region below 81.5 Hz with an inexpensive two-pole one-transistor circuit.

Three elements are secured together in new and unique fashion to form a heating unit, movable and installable as an integral unit and capable of obtaining maximum BTU's from the fuel used. These elements are (1) an outer jacket, which defines the design and outline of the heater, (2) an inner jacket, forming with the outer jacket a residual burning chamber, narrow in cross section and relatively high in vertical extent to provide maximum heat transfer surface, and (3) an A- or tent-shaped fire b...

The invention comprises an atomizing spray nozzle having an expansion chamber containing an impingement plate, or table and wherein a flow of liquid is introduced as a high velocity stream which strikes the impingement table and breaks up into finely atomized particles which are struck by a high velocity air stream in a direction at an angle to the direction of the liquid stream to further atomize the liquid particles as the mixture atomizes adjacent the impingement table and passes into a mixin...

The efficiency of a diffuser, for washing or bleaching paper pulp, is enhanced by taking steps to ensure that the approximate upstroke speed is only slightly faster than the pulp upflow velocity, to provide an early warning indication of the tendency of the diffuser screens to plug, and to prevent upward movement of the screen, after completion of a downstroke, uncontrolled by the hydraulic system designed to effect movement. The pressure under the annular screen is sensed and compared to normal...

An improved efficiency loudspeaker that increases the accoustical output of the speaker by increasing its amplitude without increasing the power input to the speaker. This is accomplished by doubling the amplitude of displacement of a speaker diaphragm. The sound power of the speaker is thus increased by a factor of four. This is accomplished by utilizing a pair of voice coils which are reverse wired to each other so that both voice coils drive the diaphragm speaker. Thus, one voice coil pushes ...

An air conditioning system refrigerant condenser (24) has opposed, parallel, vertical header tanks header tanks (12', 14') with a substantially uniform internal cross sectional area. The inlet tank (12') and return tank (14') are connected by a plurality of generally parallel flow tubes (16'), each of which is identical in size and shape with unrestricted ends opening into each header tank (12', 14'). The refrigerant inlet (20') into the inlet tank (12') is located relatively high up, as is the ...

A method for performing charging in a telecommunications system, comprising: storing at a subscriber information store subscription information including charging arrangement information indicative of the charging arrangement for a first communication terminal operating in the telecommunications system; providing by means of packet data interface apparatus packet data communication services to the first terminal, the packet data interface apparatus being capable of interfacing between the first ...

For each process unit in a multi-process unit plant, a required input and output of a fluid (eg water), in terms of both purity and flow-rate of the fluid, is determined. All of the inputs and outputs of all of the process units are represented in a graphical or tabular form, in terms of both purity and flow-rate of the fluid. The efficiency of use of the fluid is then indicated by the graphical or tabular representation. Connections between the process units may be derived from the graphical or...

A new bicycle with improved pedaling efficiency for allowing a length of crank arms to change during pedaling. The inventive device includes a pair of crank shafts secured to opposing ends of an existing sprocket shaft of a bicycle. Each of the crank shafts have an elongated slot extending a length thereof. Each of the crank shafts have a sliding bearing coupled with upper free ends thereof. Each of the sliding bearings have a roller disposed on a rear surface thereof. The rollers are coupled wi...