Abstract: A machine for drying granular materials such as sand and gravel. The machine includes coaxial inner and outer cylinders. Moist sand is introduced into an inlet end of the inner cylinder and gravel is introduced into the inlet end of the outer cylinder. The sand is moved along the inner cylinder by impellers toward the outlet end of the inner cylinder in heat exchange relation with the inner cylinder while the sand is heated to evaporate water therefrom. The heated sand is directed from the outlet end of the inner cylinder into an inlet end portion of the outer cylinder to mix with the gravel. Impeller assemblies mounted on the interior of the outer cylinder raise the sand-gravel mixture as the cyliners rotate to cause the sand-gravel mixture to advance along a space between the cylinders toward the outlet end of the outer cylinder and to cascade against an outer wall of the inner cylinder.

Abstract: A document with a background printed thereon which includes a first portion formed of small dots and a second portion formed of larger dots. The larger dots are of a size which is reproduced by a copying machine. The small dots are of a size which is not reproduced by the copying machine. When a copy is made, only the larger dots reproduce so that the copy is readily distinguishable from the original.

Abstract: A sign structure which includes a pole member, means for mounting the pole member in upright position, and a sign panel member mounted on the upper portion of the pole member. The sign panel member includes a main panel portion, a bend portion, and a minor panel portion separated from the main panel portion by the bend portion. The upper portion of the pole member is cross shaped. An opening in the bend portion receives an upper end portion of the pole member with the inner side of the bend portion supported by side arms thereof.

Abstract: A surgical head clamp which comprises a framework on which a first head engaging pin member and a rotatable bracket are supported. The axis of the first pin member is the axis of rotation of the bracket. Spaced second and third head engaging pin members are mounted on the bracket and directed toward the first pin member. The first pin member can be advanced axially toward the bracket to cause the pin members to engage the head. The bracket can be locked in selected position and is releaseable to permit turning of the head about said axis without releasing the pin members from the head.

Abstract: A machine for testing the force applied to jaws of an aneurysm clip. A pair of jaw support plates receive the jaws of the aneurysm clip on end portions thereof. One of the jaw support plates moves between a closed position and an open position in which the end portions of the jaw support plates are spaced so that the clip is open. A motor opens said one of the jaw support plates. Electric current supplied to the motor is measured to provide a measure of the force on the jaws of the clip.

Abstract: An injection molding machine utilizing a multiple plate die which is provided with a positive acting runner ejector. The runner ejector is provided with a tubular head extending into a cavity at a face of one of the die plates in which a runner forms so that the runner is molded on the head of the tubular member. The tubular member is moved by an air cylinder in the direction of die plate opening for pulling the runner clear of die surfaces. A plunger rod within the tubular member is moved lengthwise of the tubular member to mechanically release the runner from the head of the tubular member. Air under pressure is projected along the tubular member around the plunger rod to cause jettisoning of the runner from the multiple plate die.

Abstract: A support system for a wheeled vehicle. A housing is mounted on the vehicle. A pair of support arms is pivotally mounted on the housing. Wheels mounted on the support arms can engage a supporting surface. A crank arm is attached to each support arm. An actuator advances transversely of pivots of the support arms. The crank arms are linked to the actuator. A locking arm releasably connects pivots between the links and the crank arms to hold the support arms in a vehicle supporting position.

Abstract: A machine for packing flat articles in a case which includes a case elevator on which a case is supported with an open side of the case sloping and exposed. Flat articles are directed into the case transversely of the open side to form a stack inside the case. A tongue engages the stack as the stack increases in size. The tongue controls means for lowering the case as the articles are projected into the case so that the level of the upper end of the stack remains substantially constant. The tongue is withdrawn when the stack has reached a predetermined size. A hold down and pusher member is advanced into engagement with an upper portion of the stack when the stack has reached the predetermined size to hold the articles of the stack in the case as the tongue is being withdrawn. The case is transferred to a tipover frame which swings the case upwardly against a flap folding belt. As the case is transferred, flaps are closed.

Abstract: A machine which drops flat articles such as flattened cartons into a case. The articles are delivered to a basket having a floor which can be opened. The basket is mounted for up and down movement. The case is mounted below the basket with its top open and can be held in position by vacuum cup means. When the stack has been formed, the flow of articles is halted and the basket can be lowered into close proximity to the open top of the case. The basket floor is opened to drop the stack into the case. If desired, two stack sections can be formed and dropped into a single case one after the other. When the stack has been dropped into the case, the basket is raised to free the basket from the case. The vacuum is released, and the case is then advanced laterally out of alignment with the basket. The case can then be raised by a lift table to a convenient height for inspection and, following inspection, can be discharged.

Abstract: A filter assembly which includes spaced first stage resin bound fibrous filter members with a second stage fine filter member spaced between the first stage members to form plenum chambers on opposite sides of the second stage member with the first stage members being dimensionally stable and supporting and protecting the second stage filter member.

Abstract: A sway limiting linkage for a vehicle. A pair of lever members is pivotally mounted on running gear of the vehicle. Inner arms of the lever members are connected to swing up and down together. Outer arms of the lever members are linked to body frame members of the vehicle to cause the body frame members to move toward and away from the running gear in unison.

Abstract: A control circuit for an electrical device which includes a switch that is electrically isolated from other components. The switch is connected in series with a photovoltaic cell and relay means. The photovoltaic cell is illuminated so that closing of contacts of the switch causes actuation of the relay means. The relay means is connected to actuate the electrical device. Voltage at the switch is limited by the voltage produced by the photovoltaic cell.

Abstract: A monitor for a patient return circuit of a radiofrequency electrosurgical device in which an interrogation or measurement circuit is powered by a photovoltaic cell. Characteristics of the photovoltaic cell can limit the interrogation or measurement current to a value considered to be safe to a patient.

Abstract: A device for eliminating droplets of water from a stream of compressed air in which compressed air is passed through a plug of porous water absorbent material which absorbs the droplets. Continued passage of the stream of compressed air through the plug evaporates the water from the plug. The plug is held in a tubular container in series with a compressed air line. The container can be transparent. The plug can be formed of a strip of cotton gauze spirally wound with a strip of wire screening.

Abstract: Automobile front end alignment equipment in which a platform comprised of a pair of trucks correlated for like orientation while free for universal movement on a horizontal surface, supports respective carriages for free swinging about respective vertical axes, which carriages engagingly support front wheels of a vehicle in predetermined relation to the wheels of a vehicle, and a bracket attachable to a wheel whereby correlated toe-in toe-out and camber of wheels may be simultaneously measured.

Abstract: An accumulator conveyor of the type that includes a plurality of article accumulating zones extending between the infeed and discharge ends of the conveyor. In preferred form, each of the conveyor's zones includes at least one power transmission assembly, all of those assemblies being powered by a single flexible drive member, e.g., an endless chain. Each power transmission assembly includes a fluid ram which cooperates with a power wheel to move that power wheel into and out of driving engagement with the conveyor's article propelling member(s) within that zone it serves.

Abstract: An accumulator conveyor of the type that includes a plurality of article accumulating zones extending between the infeed and discharge ends of the conveyor. In preferred form, each of the conveyor's zones includes at least one novel power transmission assembly, all of those assemblies being powered by a single flexible drive member, e.g., an endless chain. Each power transmission assembly includes a novel fluid ram which cooperates with a power wheel to move that power wheel into and out of driving engagement with the conveyor's article propelling member(s) within that zone it serves.

Abstract: A solar heating system which includes a heat accumulating structure and a heat storage pit. A roof of the heat accumulating structure includes a backing board and a corrugated metal plate mounted on and overlying the backing board to form air heating channels between the backing board and the metal plate. Air is directed along the air heating channels to be heated when the sun shines on the metal plate. The heated air is directed from the channels of the roof through the chamber to heat rocks in the chamber.