Abstract: An apparatus for feeding fabric in a tensionless and distortion free manner to a fabric treating device. The fabric feeding apparatus comprises a loop forming station, a feeding station and an operator-collector station. The loop forming station continuously forms a tensionless loop of fabric by a pair of driven puller rolls, caused to activate by a signal from a photoelectric combination. The loop of fabric is sequentially fed to a feeding station by the controlled movement of a pin clamping assembly. The movement of the pin clamping assembly causes the photoelectric combination to send a signal activating the puller rolls to reform a tensionless loop. This sequence of pin clamping assembly movement and loop formation causes fabric to be continuously fed in a tensionless and distortion free manner to a fabric treating device.

Abstract: Shrimp are introduced individually onto a rotating disk inward of an adjustable gauging strip fixed above the disk's surface. Shrimp passing under the gauging strip under the influence of centrifugal force and are channeled to a first output chute. Those retained by the strip exit the disk through a second output chute. Disks may be ganged vertically to provide a plurality of sorted grades or in parallel for increased throughput.

Abstract: An apparatus for sampling insect populations in an agricultural crop environment is disclosed. The apparatus comprises a chamber to entrap insects thus allowing collecting said insects through the use of a vacuum by an operator and collecting said insects in a filter type bag from which the insects can be classified and counted.

Abstract: A method and apparatus for correlating two time series of digital quantities comprising means for converting one of the time series to a sign bit series and means for algebraically summing values of the second series which occur at times corresponding to the zero crossings of the sign bit series. The algebraic summation includes the modification of the signs of the summed values according to the direction of the zero crossing which occurs in the sign bit series. The preferred embodiment is a field correlator for use in geophysical seismic surveying to monitor data as it is recorded. The field correlator converts a digitized pilot signal into a sign bit only series, which is then correlated to a digitized record of a geophone spread output by summing only those samples of the geophone outputs which correspond to zero crossings of the pilot signal for a given lag value.

Abstract: A circuit for controlling multiple signalling sources within a key telephone system for the establishment of priorities. The circuit inhibits connection to, or permits disconnection of a secondary signal source from a selected amplifier whenever a primary signal source is connected to the same amplifier. Circuitry is also provided to indicate the disconnect condition.

Abstract: This invention provides a process for continuously removing H.sub.2 S from a fouled gas containing some oxygen. The process involves the passing of the fouled gas through a mass of porous hematite pellets in a chamber, thereby producing water and forming elemental sulphur on the pellets, and abrading the pellets to remove the elemental sulphur in a comminuted form. This invention also provides an apparatus adapted to carry out this process.

Abstract: A subscribers telephone circuit that includes automatic muting of signals reproduced by a transducer contained within the subset, each time the telephone's handset is removed from its cradle. The circuit employs electronic techniques to eliminate the need for additional contacts on the hook switch to provide the necessary muting.