Abstract: A noise cancellation circuit has a first and second input for a first signal having a signal element and a noise element, and a second signal comprising at least a smaller amplitude of the said signal element, a first inverter arrangement for producing an inverted signal output that is an inverted form of one of the first and second signals, a first adder for adding the other signal and the inverted signal to produce an intermediate signal, an intermediate inverter arrangement for inverting the intermediate signal to produce an inverted intermediate signal, and a second adder for adding the other signal, the inverted signal and the inverted intermediate signal to produce an output.

Abstract: A tray comprising a body having a front wall, back wall and a pair of side walls, a lip extending from the back wall and having a downwardly extending terminal portion to facilitate hooking on an upstanding flange. The back wall having a recess formed therein to accommodate a protuberance on a flange on which it is supported.

Abstract: In accordance with this invention an eccentrically immobilized hinge-type device is provided having a yoke shaped hinging element with cylindrical peripheral surfaces and a channel shaped hinging element with an eye-ended connecting rod, and a relatively eccentric hinge-pin. The cylindrical peripheral surfaces of the yoke shaped hinging element seats in the channel shaped hinging element and both elements pivot on the relatively eccentric hinge-pin which penetrates the bore of the yoke and the eye-end bore of the connecting rod. The eccentric hinge-pin is connected to an activating means that controls the eccentrically applied tension on the connecting rod, consequently the friction between the cylindrical peripheral surfaces of the yoke shaped hinging element and the seat of the channel shaped hinging element, thus affecting hinging ability.

Abstract: A filament forming apparatus and cooling apparatus for and method of inducing a uniform air flow between a filament forming area beneath a bushing and the cooling apparatus are disclosed. The cooling apparatus includes an air housing extending beneath the bushing. The air housing has a top wall and side walls defining an air chamber therebetween.

Abstract: An improved arc chute wrapper for an arc chute of a circuit breaker includes left and right halves that form a conjoined two-part member and that carry a plurality of spaced arc plates thereon. The left and right halves of the wrapper are formed with a plurality of left and right grooves, respectively, in confronting relation when the left and right halves are assembled together. The left and right grooves extend at most only partially into the arc chute wrapper, such that the arc chute wrapper is free of holes extending therethrough in the vicinity of the arc plates. The arc plates are free of spinning tabs extending outwardly therefrom, and rather are securely mounted in the left and right grooves of the wrapper. The arc chute wrapper is manufactured by molding or other appropriate method. The arc chute employing the wrapper of the present invention is more reliable, less expensive, and easier to produce than arc chutes employing wrappers and arc plates of the type heretofore known.

Abstract: Methods and compositions for removing perchlorate and/or nitrate from contaminated material utilizing perc1ace bacteria under anaerobic conditions. Perc1ace is a gram-negative, curved rod, facultative anaerobe which is deposited with the American Type Culture Collection under ATCC No. 202172. Perc1ace may be used as a substitute for anaerobic bacteria which are presently being used in biological systems for removing perchlorate and/or nitrate from water and other contaminated materials, such as soil.

Abstract: A bathing appliance enables a handicapped person to wash comfortably and safely inside a shower stall or in a bathtub. The appliance includes a base frame constructed to rest firmly on a floor of the stall or bathtub, and a chair seat on which the handicapped person can sit when entering and leaving the bathing enclosure and while washing inside the enclosure. The chair seat has a first swivel mechanism fixed to a bottom portion of the seat to allow the seat to be supported for relative movement over the base frame. The base frame has a second swivel mechanism that forms a fixed base pivot axis normal to the floor of the bathing enclosure. An extension arrangement has a third swivel mechanism at a top end for engaging the first swivel mechanism of the chair seat, for swiveling movement about an extension axis parallel to the base pivot axis.

Abstract: A merchandising display system includes a gridwork within which merchandise display brackets may be optimally adjustably supported. The applied brackets are resistant to lateral sliding movement and assume a first angularity when mounted to one side of the grid and a different angularity when mounted to the other side.

Abstract: A pressure sensitive field effect semiconductor device which is one element of an integrated array is disclosed. The device employs a layer of elastomer material located substantially between the gate and the current carrying channel, to effectuate the conversion of a longitudinal pressure variation to an electrical variation. The device may inherently include amplification of the electrical variation. One use for the device is in an acoustic wave detector array.

Abstract: An interferometer, that simultaneously employs two phase-quadrature reference beams of coherent light which interfere with a signal beam of coherent light reflected from a spot of a displaceable signal mirror insonified by an ultrasonic wave, permits an output signal to be derived which is proportional to the sum of the squares of the ultrasonic frequency component of the interference between the signal beam and each respective one of the reference beams. This output signal is inherently substantially proportional to the intensity of the ultrasonic wave then insonifying the spot of the signal mirror and independent of random phase drift and environmental vibrations in the interferometer. The interferometric technique of the present invention, which permits the ultrasonic wave to be in the form of pulse bursts of only a few cycles so that the output signal can be range-gated, is suitable for use in an ultrasonic-wave measurement and image display system.

Abstract: The present system permits image of internal structure of ultrasonic wave scattering object to be visually revealed on a cathode ray tube display with good contrast and good resolution, even when acoustic attenuation characteristics of object are relatively uniform and scattering points in object are due substantially to differences in acoustic index of refraction. This is accomplished by employing an acoustic quarter-wave plate to relatively phase shift unscattered wave energy passed through object with respect to scattered wave energy passed through object, thereby transforming a phase pattern manifesting the object's internal structure into an intensity image pattern thereof which insonifies a flexible pellicle mirror. The remainder of the system converts this pattern into a visual display on the cathode ray tube.

Abstract: A pressure sensitive field effect semiconductor device, which may be employed as a contactless switch is disclosed. The device employs at least one layer of an elastomer material which is also an electret to effectuate the conversion of a longitudinal pressure variation to an electrical variation and to create an electric field which regulates the conductivity of the current carrying channel.

Abstract: Detection of peak phase change at ultrasonic frequency in two mutually coherent interfering light components, one of which is obtained by reflection from a rigid reference mirror and the other of which is obtained by reflection from a spot of a flexible pellicle mirror which is insonified by an ultrasonic radiation pattern, will provide an output proportional to the displacement amplitude of vibration of the spot of the pellicle, if, as is the case, the round trip optical path to the rigid reference mirror is wiggled through an excursion greater than one-half the wavelength of the coherent light at a frequency which is much lower than the frequency of the ultrasonic radiation insonifying the pellicle and the displacement amplitude is very many times smaller than the light wavelength. By raster scanning the spot over the area of the pellicle in synchronism with the raster scanning of the electron beam of a C.R.T., and at the same time intensity modulating the electron beam of the C.R.T.

Abstract: A circumferential array of n transducers is used to image an object with resolution equal to that of an array over the entire bounded aperture. This is done by illuminating the object with m components of coherent wave energy, and coherently detecting the signal picked up by each of the n transducers for each of the m wave energy components to provide the coefficients of m complex numbers for each of the n transducers. Signal processing these coefficients, in the manner described in the disclosure, permits an image of the object to be displayed on a display device with resolution equal to that of an array filling the aperture.