Assembly of externally accessible brushes in an electric motor for power tools using an electric motor. The brushes are part of a brush holder assembly which also includes a holder having an internally threaded member portion of predetermined diameter, a tube carried in the holder, the brush radially slidable in the tube, and a coil spring carried on the brush. A retainer extends across the upper portion of the holder by a small predetermined dimension and is adapted to be radially depressed int...

A bistable solid-state device, substantially immune to long term, low level radiation comprises, in combination with memory storage elements, means comprising P-type devices responsive to enabling and disabling signals for conducting signals to and from the memory storage elements only during the presence of read and write signals, and which are substantially immune to the effects of long term, low level radiation, thereby substantially increasing the reliability of solid-state memory cells. Als...

A randomly accessible memory display is disclosed wherein a latching memory panel can be placed in direct optical contact with the triggering electroluminescent panel having a similar matrix. Once the glowing light from the trigger panel shines on the photosensitive resistive layer providing positive feedback, the corresponding region in the latching memory panel is latched. In accordance with the invention, a technique is disclosed for electrically reading the latched state in any one cell. Thi...

A computer memory system is disclosed which includes a randomly and electrically accessible semiconductor "page" memory. The semiconductor page memory is an array of memory units each of which includes an electrically accessible flip-flop for storing a binary information bit. In addition, each flip-flop is provided with a photodiode by which the flip-flop can be set in response to received light, and is provided with a liquid crystal light valve controlled by the electrical state of the flip-flo...

A computer memory system is disclosed which includes a randomly and electrically accessible semiconductor "page"memory. The semiconductor page memory is conventional to the extent that it includes a planar array of electrically-accessible flip-flops for storing a corresponding number of binary information bits. In addition, each flip-flop is provided with a photosensor by which the flip-flop can be set in response to received light, and is provided with a light valve controlled by the state of t...

A computer memory system is disclosed which includes a randomly and electrically accessible semiconductor "page" memory. The semiconductor page memory is conventional to the extent that it includes a planar array of electrically-accessible flip-flops for storing a corresponding number of binary information bits. In addition, each flip-flop is provided with a photosensor by which the flip-flop can be set in response to received light, and is provided with a light valve controlled by the state of ...

An accessible partition assembly is disclosed which comprises two opposed spaced-apart rows of panels, each panel having opposite vertical edges, and interior and exterior panel faces, adjacent panels meeting at joints in edge-to-edge relationship, a plurality of studs located intermediate said rows of panels, and positioned at joints between a pair of adjacent panels, panel and stud engageable means at each said joint, said engageable means comprising a first and second clip, each clip engaging...

A secured housing for an electronic device having an electronic memory mounted therewithin is provided which has as access aperture which provides tamper proof security and electro-magnetic interference protection while permitting access to the memory for reading the information maintained in the memory. Opening of the access aperture disables the electronic device from further operation by unlatching a switch which disconnects the electronic device from its power supply while preventing relatch...

A blank for forming a tray having a bottom wall panel and a pair of side wall panels extending therefrom and foldable relative thereto, with each side wall panel having a side flap extending therefrom. A pair of end panels extend from the bottom wall panel and are foldable relative thereto with the end panels each having an end flap extending therefrom. The end flap is connected to the end wall panel by a tearable fold line to permit the end flap to be removed therefrom. A transparent cover asse...

A raceway assembly employing snap-on outlet covers is disclosed. The raceway has multiple compartments extending longitudinally for carrying conductors such as standard house wiring power conductors and telephone or data conductors. Separate outlet housings each comprise a one piece, generally metal, bracket having a front wall on a parallel back wall. Insulative end walls are secured to enclose the interior of the receptacle housings. The brackets have openings in the front wall and outlet cond...