Abstract: This invention relates to improvements in dispensing guns and more particularly to guns of the type provided with dual conduits into which plural streams of two parts of adhesives can be fed and later intimately mixed in the detachable nozzle at the end of the gun immediately prior to application of the mixture to a surface.

Abstract: Electromagnetic or solenoid means responsive to load current to automatically shift the brushes of a motor or generator a proper amount so as to maintain satisfactory commutation from light to full load, the brush shifting means including electric solenoid means carrying machine load current, movable brush holding means mounted on antifriction bearings, and mechanically connecting the electric solenoid means mounted on a machine frame means to brush holder means so as to shift brushes in conformity to changing load conditions.

Abstract: Control valve actuated pneumatic means evacuating electrolyte from a storage battery cell to an adjacent storage compartment and for returning the electrolyte to the cell when desired, having a storage compartment, a battery cell, pipe means extending to a lower part of the cell, control valve means for regulating the evacuation and thereafter return of the electrolyte to the cell as desired.

Abstract: An electric motor vehicle drive system including a differential electric motor unit for the vehicle including a stator motor element mounted within a supporting frame and a rotor motor element rotatably mounted within the stator. The stator is connected to a first output shaft while the rotor output shaft is connected to a final output shaft through a one-to-one reverse mechanism which corrects or reverses the direction of the final output shaft. Thus, both shafts rotate in the same direction but at one-half relative armature and field structure r.p.m.'s with true differential action within the motor unit itself. The driving connection between the electric motor unit and the motor vehicle in this embodiment comprises a pulley belt combination connected to the vehicle drive wheels and the two output shafts of the motor unit with radius rods for maintaining the adjustable tension on the belt drive. So connected, there is compensation for unequal traction, turning of the vehicle, unequal wheel sizes, etc.

Abstract: A speed control system for electric vehicles for varying the applied voltage to a series wound traction motor to vary the speed thereof by dividing the main power source into a number of small units, which are then grouped and re-grouped through a series of relays actuated by a controller to provide several values of voltage from low to high voltage in an orderly progressive manner. The circuit is also provided with a ballast or surge-limiting resistor in each grouping and re-grouping, resulting in a smooth power flow and thus smooth speed change while at the same time limiting the battery drain to a safe maximum. The ballast resistor is automatically shunted out of the power circuit as the vehicle picks up speed, thereby providing an intermediate control point between each battery re-grouping step.