Abstract: There is disclosed a battery-operated motor control circuit. An adjustable voltage reference (18, 26, 28) is coupled to the battery (10), with the output of the adjustable voltage reference being coupled to the positive input of an operational amplifier (34). The negative input of the operational amplifier (34) is coupled to ratio control means (60) for setting the gain of the operational amplifier (34) and thus setting the motor (54) to a selected speed. A transistor-pair amplifier (38, 40) is coupled to the output of the operational amplifier (34), with a negative feedback line (50) being coupled from the output of the transistor amplifier to the negative input of the operational amplifier. The motor is also coupled to the output of the transistor amplifier.

Abstract: A coin-operated phonograph in which certain functions are remotely controlled. A transmitter is provided for transmitting a number of modulated carrier signals, including an up volume signal and a down volume signal. The phonograph carries a multi-channel receiver that is adapted for receiving the carrier signals transmitted by the transmitter. A detector is connected to the receiver for detecting the modulated carrier signals. An amplifier with gain control is provided and is controlled in accordance with receipt of the modulated carrier signals. A manually-operable volume control switch is carried by the phonograph and may be used instead of the transmitter to control the gain of the amplifier.

Abstract: A spike connector (10) of the type in which a hollowed spike (14) extending from the main body portion (12) of the spike connector is inserted into the stopper of a fluid source in order to convey the fluid from the source through the spike (14) and main body portion (12). The main body portion (12) includes a pair of wings (32, 34) which extend upwardly in the direction of the spike and outwardly therefrom, with the tops of the wings serving to space the remaining top of the main body portion (12) away from the fluid source stopper to prevent collection of the solution on the top of the main body portion. The undersides (36, 38) of the wings (32, 34) form a convenient finger grip. The tip portion (30) of the spike is relatively polished to enable easy insertion of the spike into the stopper.

Abstract: A system for the delivery of liquids in predetermined amounts, such as in meat tenderization, through a plurality of relatively small conduits includes a manifold chamber communicating with the relatively small conduits, a source of liquid for delivery, and conduit means providing flow communication between the source of liquid and the manifold chamber. Centrifugal pump means are positioned to pump liquid from the source of liquid to the manifold chamber, with the pump being of a capacity sufficient to create and maintain a generally constant liquid pressure in the manifold chamber irrespective of whether one or all of the relatively small conduits are open to permit liquid flow therethrough. The system typically utilizes a series of liquid delivery stations, with a microprocessor system controlling the amount of liquid delivery through each of the relatively small conduits in a manner dependent upon the weight of the object to which the liquid is being delivered.

Abstract: A coin-operated phonograph is provided which includes a cathode ray tube for displaying information, such as title strip data, in alphanumeric form. The phonograph includes means for storing the information to be displayed in digital form. An optical character reader is used for entering the information into storage in the storage means. Means are responsive to the storage means for controlling the presentation of the information on the cathode ray tube.

Abstract: A system is provided for controlling fan-out in a web offset press. A bowed roller is interposed upstream of the blanket cylinder of the first printing unit. The bowed roller applies outward lateral forces to the web, to expand the web laterally prior to printing thereon by the blanket cylinder of the first printing unit.

Abstract: A check valve housing is rigidly attached to the first inlet of an injection site having a body portion, a first inlet, a second inlet and an outlet. The check valve housing encloses a duckbill valve member and has an interior wall which securely and frictionally engages a portion of the external surface of the duckbill valve member.

Abstract: A process and device are provided for detecting frequency variations of waveforms (10). The waveform (10) is sensed and a first signal (16) is provided with each occurrence of the sensed waveform (10). Each time that the first signal is provided, a measuring pulse (24) that is different in duration than the sensed waveform (10) is provided. The sensed waveform (10) and the measuring pulse (24) are simultaneously transmitted to a gate (28) which provides a signal at its output to indicate if the frequency of the sensed waveform has varied more than a predetermined amount.

Abstract: Automated apparatus for applying integrated circuits to a circuit board in which the integrated circuits are fed to the apparatus through the open end of a tubular magazine which holds them in a linear array, and which is positioned in registry with a feeding aperture of the apparatus. By this invention, a casing is provided for holding a plurality of the magazines in side-by-side relation, with the first of the magazines of the plurality occupying the position of registry with the feeding aperture. A spring loaded platen member is provided for biasing the magazines toward the position of the first magazine, so that when the first magazine is emptied of its integrated circuits it may be removed from the casing, and another of the tubular magazines moved by the resilient means into the position of registry.

Abstract: A system is provided for weighing freight cars coupled in motion during loading. An upstream weigh bridge is provided and is mechanically separated from a downstream weigh bridge, with a loading chute overlying one of the weigh bridges for dispensing material to the freight cars. The upstream weigh bridge has a length that is less than the distance between the rear axle of one car to be loaded and the front axle of the succeeding car.The position of the freight car under consideration is sensed and the chute is opened to load the freight car. The full draft weight of the freight car during loading is detected, taking the weight on the upstream weigh bridge into consideration. The chute is closed when the weight reaches a predetermined amount. The weight of the loaded freight car is determined after the freight car has left the upstream weigh bridge and only the weight on the downstream weigh bridge is taken into consideration.

Abstract: Dynamically changing time-multiplexed numbers are presented by reading data one digit at a time, storing the digits, repeating the reading sequence at least twice and comparing the stored digits from each reading sequence against the stored digits from the previous reading sequence. If two consecutive reading sequences are not identical, the reading sequence is repeated at least twice again.

Abstract: An arcade game in which the housing defines an opening on the front portion of the housing. A sliding panel which carries electronic circuitry is slid into and out of the housing, through the opening, along tracks. The front of the housing has a door for covering the opening, but this door is normally locked and can be unlocked only from inside the housing. To obtain access to unlock the door, the coin box closure on the front of the housing must be unlocked, enabling the operator to extend his hand into the interior of the housing to unlock the door.

Abstract: In a heat exchanger of the kind used for the transfer of heat from exhaust air, e.g. from rooms, to fresh air to be led into rooms, or for the transfer of heat the opposite way, means (9) for the cooled exhaust air are arranged after the outlet (4) with a view to transferring heat from the exhaust air to a heat reservoir (12), i.e. a heat pump circuit (10, 11). The thermodynamic efficiency is dependent on the difference in temperature, of course, and by transferring heat from exhaust air to for instance a water tank for hot water, the temperature being in some places close to the flow temperature of tap water, it will be possible to make use of much more of the latent heat of the exhaust air.

Abstract: An electronic control circuit is provided for controlling the operation of pinball machine flippers. Each flipper is operated in response to the energization of a single solenoid coil in which the same winding is energized to place the flipper in an actuated position and to hold the flipper in the actuated position. When a flipper switch is activated, a full wave rectified voltage is applied to the solenoid coil to place the flipper in an actuated position. When the flipper has been sensed to be in the actuated position, only a partial phase controlled voltage is applied to the solenoid coil to hold the flipper in the actuated position until the flipper switch is deactivated.

Abstract: A method and apparatus are described for obtaining a desired rate of plasma collection from a membrane plasmapheresis filter having a blood inlet, a blood outlet, a plasma outlet, outer members and a pair of spaced microporous filter membranes defining a blood flow path. A holder is provided for the filter having means for applying pressure against the outer members. The blood pressure at the blood inlet is sensed during plasmapheresis and variable amounts of pressure are applied against the outer members at an angular direction with respect to the membranes. In this manner, the blood flow path gap between the membranes is controlled in accordance with a desired blood pressure adjacent the blood inlet.

Abstract: Apparatus for the automatic infeed of a fibre sheet into a coiler comprises a smooth-surfaced transverse guide 6 to be placed at the delivery side of a pair of drawing rollers 1, 2. The guide 6 has an orifice 7 for gathering into a tuft the fibre sheet 3 coming from said pair of drawing rollers, a cylindrical outlet tube 8 extending said orifice 7, pneumatic means 18 for drawing the tuft into the outlet tube 8, and a pair of draw rolls 9 set at the downstream end of the outlet tube.The invention may be applied to the introduction of a fibre sheet into a coiler, the fibre sheet leaving the last pair of rollers of the drafting train of a machine.

Abstract: A process and apparatus for mixing at least two parenteral solutions, sterilizing the resulting mixture, and transferring the sterilized mixture into an extensible, plastic receiving bag. The apparatus includes a mixing chamber into which the solutions can be delivered, a bacterial organism retentive filter for sterilizing the mixture of the solutions received from the chamber, such a receiving bag, tubing for transferring each of the solutions to be chamber, and second tubing for transferring the sterilized mixture from the filter to the bag. All are combined and then sterilized as a unit. In one embodiment of the invention, the bag is placed in a vacuum chamber to facilitate transfer of the mixture through the apparatus and the mixing chamber has a baffle or system of baffles for creating turbulence in the solutions while they are being mixed.