A rotating power transmission member engaged with a segmented power transmission means is balanced to counteract vibratory torques and forces by three tuned pendulum balance weights spaced 120.degree. apart. A specific application is to a crawler vehicle with tuned pendulums in the track drive, bogey and idler wheel assemblies to balance and counteract vibratory forces and torques transmitted to the wheels by the track. The balance weights are built into each wheel assembly and are tuned to the ...

A ball bearing assembly is disclosed wherein dynamic and inertial force unbalances and variations inherent in conventional bearings produced by inconsistent ball-to-cage and cage-to-land contact forces resulting in bearing instability and vibration are compensated by configuring the ball cage such that the relative mass positions of the balls and the cage are predetermined, maintained constant and are compensated within the rotating system whereby the radial inertial forces are rendered predicta...

A dynamically piloted spool type gear coupling including a spool having external spur gear teeth around its outer periphery and a sleeve surrounding the spool having internal spur gear teeth around its inner periphery in driving engagement with the spool external teeth and a dynamic piloting means within the spool operative upon rotation of the coupling to diametrically expand the spool for maintaining piloted engagement between the external and internal gear teeth. The piloting means preferably...

A tennis racket has a tubular member, formed to the racket shape, which defines two tubular paths extending along opposite sides of the handle portion of the racket from approximately the top of the grip completely around the periphery of the string area to the topmost point of the head. Within each tubular path is a plurality of weights. Fixed at the topmost point of each tubular path is a coiled spring which maintains the weights in the lowermost portion of each tubular path, but whose force i...

Shoes constructed of light transmitting material to receive a light source and modulator unit for changing the coloration of high intensity light intermittently emitted to illuminate the said shoes.

A dynamically programmable processing element (DPPE) is disclosed which element has the utility in a digital processing system which requires complicated arithmetic procedures to be implemented. The DPPE device is a special purpose computer which essentially has a program bus for transmitting and receiving program data from an external source. A data bus is also provided which bus can transmit or receive digital data. Coupled between the buses are input and output registers or buffers which are ...

Gyroscope apparatus includes a tubular rotor that is supported at opposite ends by bearings, such as a gas-lubricated bearing, for rotation about its axis. A gimbal ring encircles the rotor and is resiliently supported with the rotor, for angular displacement about an axis at right angles to the rotor axis, by a pair of flexure pivots located intermediate the ends of the rotor. An inertia ring is mounted concentrically with the gimbal ring by another pair of flexure pivots for angular displaceme...

A dynamically balanced vibratory feeder system having a material handling component and a counterweighting component, the two components being drivingly interconnected and driven in opposed relative directions in a balanced fashion. The material handling component includes an elongated platform formed to accommodate a material conveying trough. The counterweighting component includes a rigid plate and a balancing counterweight secured to the plate and located between the elongated platform and t...

The housing of a reduction valve includes an input chamber, an output chamber, and a main valve seat located therebetween which is engaged, when the valve is closed, by a main piston. The interior of the main piston defines a control chamber into which fluid from the input chamber can flow at a limited but substantial rate. An inner valve seat is formed in the top of the main piston which defines an opening leading from the control chamber to the output chamber. An inner piston is adapted to eng...

A toy block of specially chosen dimensions, construction, shape, and weight so as to be ideally suited for stacking, balancing, and tumbling in such a way as to teach concepts of weight, counterweight, balance, friction, levers, inertia, and momentum. Additional concepts in the field of electronics may be taught through analogies drawn between the block constructions and various electronic components.