Abstract: Various shaped abrasive particles are disclosed. Each shaped abrasive particle includes a body having at least one major surface and a side surface extending from the major surface.

Abstract: A lock system for locking a chest having multiple banks of drawers having a horizontally situated transfer mechanism, the transfer mechanism adapted to move horizontally and where the transfer mechanism is positioned behind a portion of each of the multiple banks of drawers intended to be locked and unlocked; a lockrod for actuating the horizontally situated transfer mechanism; and a plurality of vertically situated lock hinges, where each of the lock hinges corresponding to a bank of drawers, and wherein each of the vertically situated lock hinges are actuated by a horizontal movement of the transfer mechanism.

Abstract: A modular workstation having a first module element having a plurality of grooves, a back panel and a side panel portion; a second module element having a plurality of grooves corresponding to the grooves of the first module element, a back panel, and a side panel portion; a plurality of rails inserted into the plurality of grooves of the first and second module elements; a top panel secured to the back panels and side panel portions of the first and second module elements; at least one upright attached to a base portion formed by the connected first and second module elements, a plurality of drawers, and a device for holding the plurality of drawers attached in predetermined positions on the uprights and side panel portions of the first and second module elements. Where uprights may be removed and added in predetermined slots for creating alternative drawer arrangements.

Abstract: A read head for optically scanning a ballot on which votes are cast by marking the ballot with a writing instrument within a voting area defined between a pair of spaced-apart timing marks includes infrared emitters illuminating the timing marks and emitters of visible light illuminating the voting area between the marks. The illuminated portions of the ballot are imaged onto three PIN photodiodes place in a line. The outer two PIN photodiodes are effectively apertured to resolve the timing marks and the middle PIN photodiode is effectively apertured to resolve a voting mark of a predetermined minimum size. The ballot, the image and the apertures are carefully aligned such that the photodiodes detect changes in light level associated with an image of a mark passing across the apertures.

Abstract: Resistors have successfully replaced corona point discharge devices in the control of high voltage gradients, such as those experienced in electrostatic accelerators. An improved resistor for such applications which has a single elongate resistive element, one end of which is mounted on a metal clamp which is adapted to be clamped to the edge of a metal disc of the type used in a supporting column or tube of an electrostatic accelerator. The other (free) end of the resistor is unsupported, but carries a tubular capacitive electrode, which provides, with a cylindrical metal housing which is mounted on the clamp coaxially with the resistive element, a spark gap. The free end of the resistor also supports a light-weight connector, into which or on to which a plug can be inserted or affixed to make an external electrical connection to the resistive element.

Abstract: An improved stereoscopic television system is disclosed, having a great deal of compatibility with the existing commercial television infrastructure. Flicker is eliminated while preserving the existing bandwidth allowing the stereoscopic video signals to be handled with conventional apparatus such as video tape recorders, video disks, or broadcast equipment. In the present invention the number of fields per second is twice that of he standard field rate. When displayed on an unmodified receiver or monitor, each subfield image appears to be anamorphically compressed in the vertical direction by a factor of two. A blanking area and/or vertical sync pulse separates the two subfields.

Abstract: A grand piano lift comprising a dolly on which the piano is placed and having a hydraulic cylinder fixed in vertical disposition to the dolly in the vicinity of each of the three legs of the piano. A piston is slidably disposed in each of the cylinders and has a piston rod extending from the piston fixed to a pedestal that contacts the floor or platform from which the piano is to be supported. An operator operated UP switch is electrically connected with a source of hydraulic fluid under pressure so that the operator can cause fluid to be applied to the cylinders from the source and so that the cylinders are effective to raise the dolly and piano. A similar DOWN switch causes this fluid to be drained from the cylinders to cause the piano to be lowered.