A heavy duty nibbler possessing certain improvements over the nibbler tools of U. S. Pat. Nos. 2,888,744, 2,967,355 and others, including a punch that is threadedly seated in a main body part such that it is not necessary to remove any parts when the punch is threadedly withdrawn from the bottom of the main body part. The punch is of half-moon shape so that the punch makes an initial partial cut into the work. The portions of the punch are angularly related such that the punch is divided into an...

An apparatus for containing an electrical plug, particularly where a large force is required to either insert or withdraw the plug from a mating outlet. Gripping wells are disposed on opposite sides of the plug which provide both a protective lip and a gripping lip. The protective lip avoids arc burns and electrical shocks during plug insertion. The gripping lip facilitates the applicaton of force during plug withdrawal. Sophisticated fabricaton of parts and the need for additional parts are bot...

A heavy-duty V-belt is characterized by envelope construction enclosing a stiff fiber-loaded compression section and molded-in transverse corrugations on the inside surface having a depth at the longitudinal center of the belt greater than the envelope material thickness and tapering into the sides of the belt to a depth at least equal to the envelope thickness.

A heavy duty display hook which supports point of purchase items or packages is insertable into a rectangular slot of a panel, such as a cardboard panel provided with one or more rectangular slots for display hooks. The display hook includes a front plate which is substantially vertically disposed in use and which has an upper end and a lower end and an elongated support member which projects forwardly from and extends upwardly in slightly inclined fashion to the front plate. A bridge extends re...

Apparatus for facilitating engagement and disengagement in electrical connectors, particularly where large electrical loads are transmitted therethrough. A pivotal handle is disposed on the connector plug to protect the operator from electrical hazard and to maintain a relatively compact plug profile. Cooperation between the handle and the connector outlet creates a mechanical lock to preclude inadvertent disengagement and also achieves a relatively large mechanical advantage when disengagement ...

A heavy duty pneumatic tire, in which uneven tread wear is controlled, has a tread portion provided with a pair of main circumferential grooves so as to divide the tread portion into a pair of shoulder lands between tread edges and the main circumferential grooves and an axially inner land between the main circumferential grooves, each main circumferential groove having a width of from 4 to 12% of the tread width TW, a narrow circumferential groove extending circumferentially of the tire along o...

A closed loop control system for controlling the average output of a generator or other device. The output is detected and the detected signal is applied to a summing point at which it is summed with an externally supplied control signal. The summed signal is integrated and applied to a Schmidt Trigger, the output of which is coupled through control logic to control the generator. The generator duty cycle is controlled to maintain a desired average output. In a specific embodiment wherein the av...

A large cast low cost anchor construction of high holding power to weight ratio. Specially shaped fluke stiffening ribs permit relatively thin flat flukes in massive anchors and a new aspect ratio of fluke length to shank length in excess of 0.600.

A limiter circuit receives a distorted or unsymmetrical input signal, and in response thereto produces a rectangular current waveform. The rectangular current waveform is applied to an integrating means for generating a triangular waveform, the average value of which divides such triangular waveform into equal time intervals. This triangular waveform is a.c. coupled to a second limiter circuit which provides an output waveform characterized by a fifty percent duty factor.

A duty cycle corrector, including a first, second circuit and a third circuit is disclosed. The third circuit is configured to obtain a threshold value in response to charge flow that is regulated by the first circuit and the second circuit, wherein the first circuit is configured to receive a clock signal and change the charge flow at a first transition of the clock signal. The second circuit is configured to change the charge flow at a second transition of the clock signal. The first circuit a...