Abstract: A pest extermination system for installation in a structure for distributing pesticide and insecticide. The pest extermination system includes a piping system. The piping system has a plurality of nozzles positioned therealong that are adapted for spraying a pesticide. A pumping device is in fluid communication with the piping system and is adapted for pumping pesticide into the piping system.

Abstract: A three-dimensional part measurement system includes a base; at least two guides in the base extending along a first dimension of the part to be measured; a carriage; at least three followers supporting the carriage and movable along the guides to follow the part in the first dimension; and a first gauge mounted on the carriage for measuring deviations of the part in a second dimension and a second gauge mounted on the carriage for measuring deviation of the part in a third dimension.

Abstract: A small article storage and retrieval apparatus (10) for storing, transporting, sorting and retrieving a plurality of diverse articles (100); wherein, the apparatus (10) comprises a plurality of generally L-shaped nesting receptacle members (20); wherein, each receptacle member (20) has a receptacle portion (30) and an enlarged shallow sorting portion (40) disposed generally perpendicular to one another.

Abstract: A method of maintaining a constant predetermined hydrostatic pressure in a wellbore being drilled by a rotary drilling process utilizing aerated drilling fluid. The aerating gas, such as compressed air, is maintained at a constant pressure while its flow is changed in response to changes in the flow of the drilling fluid. This maintains a constant ratio of compressed air to drilling fluid, resulting in the hydrostatic pressure remaining constant.

Abstract: A method for determining the volume of gas flow in a conduit. Magnetic heads mounted on arms that oscillate in response to pressure changes record magnetic signals on rotating magnetic discs instead of the usual method of recording ink tracks on paper charts. The magnetic signals are then sensed and integrated to volumetric data by means of a computer program. Both ink and magnetic indicia may be made on the same disc if desired.

Abstract: This invention is an acoustic feedback peak elimination unit and has as its objective the elimination of unwanted acoustic resonance peaks, also called ring modes, inherent in an enclosed region where a sound amplifying system may be used. A number of separate units embodying the present invention may be used in cascade, each unit being adapted to handle a small frequency range of about an octave within the entire frequency range to be amplified, each such unit functioning at unity gain to eliminate a single feedback peak when present. In addition, the invention includes means for energizing an oscillator within its tunable frequency range so that a particular frequency may be introduced for tuning the entire sound system with desired precision.

Abstract: A circuit for indicating faults in a storage battery charging system of the type including an alternator having a field winding and a rectifier circuit having respective battery charging and alternator field winding energizing output circuit terminals. A differential amplifier circuit, to which is applied normally equal reference sensing potentials which become unbalanced with alternator faults, produces a first fault indicating signal in the event of an alternator malfunction and a transistor having the control electrode connected to the rectifier circuit field winding energizing output circuit terminal produces a second fault indicating signal in the event of a failure of one of the diodes in the rectifier field winding energizing output circuit. These fault indicating signals trigger a transistor conductive to complete an energizing circuit for a fault indicating device.

Abstract: A circuit for indicating faults in a storage battery charging system of the type including a voltage regulator controlled alternator field winding switching transistor and a rectifier circuit having a diode trio which supplies alternator field winding energizing current. A differential amplifier circuit, to which is applied normally equal reference and sensing potentials which become unbalanced with alternator faults, produces a first fault indicating signal in the event of an alternator malfunction and a transistor having the control electrode connected to the output of the field winding diode trio of the rectifier circuit produces a second fault indicating signal in the event of a failure of one of these diodes. These fault indicating signals trigger a transistor conductive to complete an energizing circuit for a fault indicating device. Additionally, an oscillator flashes the fault indicating device "on" and "off" in the event of a voltage regulator failure.