51
Gouge Jr James Reid, Barron Robert L: Redundant, self-checking, self-organizing control system. Adaptronics, July 13, 1971: US3593307 (34 worldwide citation)

A self-organizing control system having a plurality of self-organizing controllers acting in parallel to provide actuation signals for plant control. The controllers are constantly monitored to locate faulty controllers. When one controller does not compare with the others, it is initially coerced t ...


52
Kaufer Helmut, Burger Erich, Huber Hans Peter: Copying apparatus with lenticular optical system. Agfa Gevaert, July 13, 1971: US3592542 (34 worldwide citation)

An optical system composed of pairs of lenticular bars, each of which has a row of lens portions with spherical and planar faces, scans successive strips of an original which moves relative to a copy sheet. Strip-shaped erected images of the scanned strips are projected onto successive strip portion ...


53
Domshy Ernest H, Moller Victor: Starting and operating control for an AC motor powered by a DC power supply. North American Rockwell Corporation, July 13, 1971: US3593078 (33 worldwide citation)

An AC Motor Control, wherein the AC motor is powered by a DC power supply through a DC to AC converter circuit, and wherein the control has an AC current sensor for producing a current signal indicative of the current supplied to the motor which signal is coupled to the converter to prevent excessiv ...


54
Gibby Delbert F: Slide rule for computing musical relationships. July 13, 1971: US3592099 (33 worldwide citation)

A slide rule capable of computing through mathematical constants substantially all significant musical relationships as they apply to any given key including chord structure and interval patterns of major and relative minor diatonic scales. The slide rule comprises a plurality of slidable members on ...


55
Harris George A: Ultrasonic detector. July 13, 1971: US3592967 (33 worldwide citation)

This application discloses a detector for leaks which generate ultrasonic waves, such as illuminating gas leaks, and electrical leaks of the corona or arcing types. An ultrasonic detector is utilized to respond to the ultrasonic waves generated by the turbulence in the atmosphere caused by such leak ...


56
Takeda Chuji, Sawada Katsuo, Asanari Shigeyuki, Nakamura Tetsuya: Electrically operated vacuum cleaner equipped with automatic filter-cleaning means. Matsushita Electric Industrial, July 13, 1971: US3591888 (32 worldwide citation)

An electrically operated vacuum cleaner having automatic filter-cleaning means, said means comprising a filter-cleaning member adapted to be driven by the rotation of cord takeup means transmitted through power-transmitting means, the movement of the filter-cleaning member being utilized to apply de ...


57
Glatfelter Edward W: Convertible aircraft. The Boeing Company, July 13, 1971: US3592412 (32 worldwide citation)

A rotor hub assembly for aircraft adapted to hover, climb, and descent like a helicopter, yet also adapted to cruise in the manner of a conventional fixed-wing airplane. The rotor hub assembly includes rotor blades which are movable between extended, operational positions during the hover mode and r ...


58
Rippon George Maxwell: Fluid circulator. July 13, 1971: US3592450 (32 worldwide citation)

A liquid-circulating device includes a vertical stack submerged in liquid and provided with a large bubble generator adjacent its bottom opening. The bubble generator comprises an open bottomed gas chamber and an inverted tubular siphon including a first vertical leg communicating with the upper par ...


59
Schneller George H, Levi Ralph S, Levin Howard J, Goodsir Stephen W: Universal dispensing device for intravenous medications. American Home Products Corporation, July 13, 1971: US3592245 (32 worldwide citation)

The disclosure is directed to a universal dispensing package for medicaments to be dissolved in a parenteral container prior to use. A container is provided with a cap which first, has a hollow piercing device for dispensing a contained medicament into a 'closed system' parenteral solution container ...


60
Walter Richard K: Acoustical panel for freestanding space divider. Conwed Corporation, July 13, 1971: US3592288 (32 worldwide citation)

An acoustical panel is provided for a freestanding space divider which panel is resilient transverse to the major faces thereof in order to provide for easy insertion into the frame of the divider and further to provide for application of additional finishing sheets to the surface after insertion in ...