Usually, power supplies are not capable of switching off part of the outputs of a main power supply during stand-by. Due to this, stand-by power supplies are used in addition to operation power supplies. Consistent with an example embodiment, a forward converter is provided, including switches in the rectifier circuit thereof. Due to this, the rectifier circuits may be selectively switched on and off. Advantageously, this may allow that the main outputs of such a forward converter are switched o...

A manually powered fastening tool which stores and instantly releases the energy of a spring such that it may force a fastener into an object by an impact blow in which the operating handle is hinged near the end of the tool body opposite the end from which the staples exit. The main spring is a single piece flat torsion spring which decreases in cross-section away from its fulcrum point to enable the entire spring to provide energy storage. The operating handle is linked to the spring through a...

A feed-forward amplifier with an input arranged to receive wide-band signals and an output to supply a linearly amplified version of these has two parallel signal paths arranged between such input and output, one of the signal paths includes a cascade connection of a signal amplifier and a delay network and the second signal path includes an error amplifier, an error extraction circuit having a directional coupler in which an input side has a first pair of conjugate first and second ports and is...

In a gravity-feed shelf having an endless flexible conveyor belt supporting a plurality of articles arranged in a column and automatically feeding the articles in said column forward in a columnwise direction when the foremost article in the column is removed, one or more frictional pads are located at a position underneath said conveyor belt and are responsive to the presence of an article on said belt and above said position, for stopping the movement of said belt.

A truck comprises a generally U-shaped frame and a dump body pivotally mounted forwardly on the frame and supported on a pair of laterally spaced and parallel side beams thereof. The dump body comprises four triangularly-shaped bottom wall portions converging downwardly to form an inverse pyramidal construction. A double-acting hydraulic cylinder is pivotally interconnected between the frame and dump body to selectively raise the dump body to discharge materials forwardly of the truck. An operat...

The cascode feed forward amplifier is modified to correct alpha-induced error. A pair of resistors are serially disposed between the bases of a pair of common-base amplifiers to generate an error voltage proportional to the input signal. The error voltage is applied to the correction amplifier to provide an appropriate correction current.

A forward, stowable seat and back has a seat frame, floor frame, and forward and rear sets of upright frames which form a modified parallelogram to allow swingable movement of the seat and back from a cantilevered rear position in which the seat and back are cantilevered or suspended rearwardly of the floor frame and a stowable, forward position in which the seat and back are moved forwardly of the rear end of the floor frame. A collapsible link limits the rearward movement of the seat and back ...

A shift interlock for a multi-speed transmission controlled by a speed lever and a directional lever is disclosed which prevents inadvertent operation of the directional control feature while the transmission is in the high gear ratios. The interlock is comprised of a pair of lock pins disposed between a first and second shift rod and having a length longer than the distance separating the shift rods. Each shift rod defines a plurality of grooves thereabout to receive the lock pins. One rod is m...

A feed forward circuit that can be used as an isolator or filter includes a first and a second directional coupler that, depending on the application, either splits an applied signal into two paths or combines the two paths to obtain an output signal. One path includes an electronically tunable band reject filter (or notch filter) which may be bypassed by a switch in the isolator application, and an inverting amplifier. The second path includes a delay line that compensates for the time delay of...

A lamp is provided for use on vehicles, which lamp is of the type wherein the light rays are projected forwardly in a predetermined pattern. The predetermined pattern is generated by virtue of a generally continuous grid of the reflector within the lamp, and the lamp does not need a prismatic lens system at the location where the light rays eminate from the lamp.