Century Mfg. Co.

Other

Snap-On Inc.

Ephtec, Inc.

Leonard S Smith

Ralph L Powers

Gary L Cook

Duane B Haagensen

Darcy C Moses

This invention is directed to a caster wheel foot brake assembly which may be used with casters on items such as shopping carts, strollers, moving carts, furniture and the like. The brake assembly includes a foot pedal, pair of connector arms, brake arm, U-shaped braking foot and hinge spring which form an overcenter locking mechanism. In order to engage the braking foot with the caster wheel, the user pushes down on the rear portion of the foot pad, thereby moving the braking foot overcenter in toggle fashion into a releasably locked braking position. In order to disengage the brake, the user may either push down on the front portion of the foot pad or pull back on the shopping cart or other item attached to the caster, thereby moving the braking foot back overcenter into a disengaged nonbraking position.

Shopping cart brake assembly

A power supply for a consumable electrode arc welding system includes a power transformer adapted to be coupled to an AC source and having a rectified secondary coupled through a series inductor to the electrode. The rectified current is chopped by a MOSFET switch array controlled by a relatively high frequency pulse width modulator having a selectively variable pulse width to supply a pulsed unidirectional current flow to the welding gun. A bridge rectifier is connected across an auxiliary winding of the transformer to provide a supply voltage to the modulator.

Precision linear variable current control

A shopping cart has a foot brake assembly added as an improvement. The assembly comprises a shopping cart caster frame variable length mounting bracket with a worm clamp for mechanically attaching the brake housing and subsequent brake assembly to the shopping cart caster frame. The brake mechanism itself is comprised of a toggle pedal, connector arms, a brake arm, a brake foot travel adjuster rod, a brake foot, aligning and lubricating spacers, as well as required tension pins. The pedal is pivotably attached to the connector arms and pivotably attached to the brake housing. The connector arms are pivotably attached to the brake arm which is pivotably attached to the brake housing. the brake foot travel adjuster rod is screwed into the brake arm and is bonded to the brake foot. The brake foot engages the shopping cart caster wheel when the toggle pedal is depressed by a downward force applied by the operator's foot to the rear portion of the top surface of the toggle pedal. The brake foot disengages the shopping cart caster wheel when a downward force is applied by the operator's foot to the forward portion of the upper surface of the toggle pedal.

Shopping cart foot brake assembly

The microwave apparatus for processing dielectric materials includes a number of tunable cavity devices arranged vertically one above the other, each having a movable piston. Dielectric conduit means extend downwardly through all of the cavity devices, passing through the various movable pistons. Each tunable cavity device has a microwave generator associated therewith so as to supply controlled amounts of power at frequencies depending upon the type of material being processed. The processing is monitored by additional cavity devices, each having a movable piston. Whereas the pistons of the power cavity devices are positioned so as to cause the material being processed to absorb a maximum amount of microwave power, the pistons in the monitoring devices are positioned so that a detectable amount of power is reflected. The amount of reflected power is indicative of an electrical characteristic, such as moisture. A signal is derived from each of the monitoring devices for controlling the amount of power to the power cavity device with which it is associated. Graphs are employed so that the optimum position for a given plunger can be selected for the greatest amount of absorption (or the least amount of reflection) to be attained and in order to determine the amount of microwave power to be supplied to a particular power cavity device.

Apparatus and method for processing dielectric materials with microwave

This invention relates to a protective circuit which senses and protects a current regulating battery charging circuit against the effects of reverse polarity and short circuiting originating with the battery being charged.

Protective sensing means for battery charging circuit

This invention relates to the modification of a moving magnet type of a direct current reading meter wherein by the addition of an electro-magnetic coil, the permanent magnet of the meter is influenced by the magnetic field of the coil with respect to the current flow to provide a reading to indicate full scale values of a much lower current value than that of the basic movement of the meter.

External means for increasing the sensitivity of a moving magnet type of

This invention is in connection with a sliding shunt type of welder wherein the improvement consists of a shunt being released positioned and secured relative to the core of the welder by a single hand action of the operator, the shunts being carried by a pair of channel members connected by a frame member, the channel members being slideable in a track moveable into and out of operative relationship with said core and with one of the channel members having movement relative to the other channel member and being spring pressed into a normal locked position and with this channel member being released by the squeezing of a handle carried by the frame which retracts the spring bearing against the one channel member and frees both channel members for movement in the track relative to the core by a simple squeezing hand action of the operator.

Shunt release and locking structure

This invention is in connection with a sliding shunt type of welder wherein the improvement consists of the shunt being moveable relative to the core of the welder by the use of a single hand of the operator, the shunt being carried by a pair of channel members, the channel members being moveable by a single handle which by axial movement positions the shunt in a desired operating position and which by rotation operates a simple latching mechanism.

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Minneapolis, MN, United States of America

Leonard S Smith