A power stylus for use in punching pre-scored areas from machine precessable record cards or the like. The stylus employes a compound pinion gear cluster coupled to a perforating point. A driving force is applied to the housing which transmits the force to the perforating point through the gear cluster. The force transmitted to the perforating point is greater than the driving force because of the mechanical advantage derived from the compound pinion gear.

A heat source heats air which rises in a duct having at least a one hundred meter vertical rise. Cold air enters the bottom of the duct through one or more horizontal passages containing vanes driven by moving air as a power source. The heat source may be a heat exchanger connected to an atomic reactor, a fossil fuel plant, a solar collector, or a geothermal heat supply. The heat exchanger may be located in the duct or in the one or more horizontal passages. In some applications, solar energy ma...

A power amplifier device comprised of at least two amplifying circuits, each including an input, at least one voltage amplifier stage, at least one power amplifier stage adapted for signal impedance conversion, and an output, all connected in series, and further including a signal input terminal and a signal output terminal. Plural switch means are provided for selectively interconnecting the voltage amplifier stages and the power amplifier stages of the amplifying circuits for selectively estab...

A method and apparatus for the generation of power wherein a fluid is circulated within a pressurizer wherein the fluid is pressurized by centrifugal action and then passed via nozzles to a toroidal shaped cavity for further pressurization. After passing through said circular shaped cavity, the fluid passes through nozzles oriented to discharge forward, in the direction of rotation, and then the fluid is passed through a reaction type turbine wheel with inward flow, to generate the power. Work i...

A pressure relief system for hydraulic power transmissions has a main relief valve and a pilot relief valve controlling the former. The spring force of the pilot relief valve is varied by two modifiers, one of which decreases the spring force as the system pressure increases and the other of which increases the spring force as the system pressure increases. A dashpot delays the action of the second modifier to thereby reduce the pressure overshoot when the system is subjected to sudden pressure ...

The specification describes a power pack for house and garden equipment with an electric motor drive. Rechargeable batteries including a battery charger and a battery charger plug are mounted in a housing, which with a guide holding collar having two electrical contact terminals can be slid into a correspondingly shaped recess with a close fit in the housing of an article of equipment and can be locked in place.

A power means for obtaining useful power from moving fluid such as water waves or air motion, having an impeller body and an arrangement of baffle means for guiding the moving fluid to cause it to impart torque to the impeller.

A power circuit in which a commercial AC power is supplied to an active filter through a rectifying circuit and a DC power is supplied directly to the active filter by the use of a switching mechanism for switching over between the commercial AC power and the DC power. The resistor for setting the voltage between the input and output terminals of the active filter is divided into two parts to one of which a transistor is connected in parallel. The transistor is turned on or off by the switchover...

A power transmission includes a chambered housing having a horizontal axis with a rotatable crankshaft disposed therethrough and outwardly of the housing independently mounted upon a suitable support. A pair of diametrically opposed radial rods on said crankshaft pivotally mount a pair of pistons which on rotation of the crankshaft are yieldably biased outwardly. Cam rollers on said pistons bear against cam bore within said housing. Said bore includes a circular portion of maximum radius through...

A power plant adapted to be driven by a flow of high-temperature gases, in which hydrogen peroxide is supplied into a feed chamber and delivered through a catalyst for exothermal decomposition into water vapour and oxygen, and into a combustion chamber in which the water vapour and oxygen are utilized through combustion of fuel to produce high-temperature gases which flow through a venturi portion leading from the combustion chamber into a gas flow passage thereby driving a turbine wheel located...