21
David M Erdman: Electronically commutated motor and method of making same. General Electric Company, Ralph E Krisher Jr, January 25, 1977: US04005347 (60 worldwide citation)

A brushless DC motor is constructed with photosensitive devices for detecting rotor shaft position. Arcuate permanent magnets on the rotor provide a DC flux field while distributed stator windings, each spanning a fixed number of slots in the armature assembly, provide mutually perpendicular magneti ...


22
Paul E Bender, Bernard Loev: N-Heterocyclic-9-xanthenylamines. SmithKline Corporation, Joan S Keps, Richard D Foggio, William H Edgerton, January 25, 1977: US04005208 (59 worldwide citation)

The compounds are N-piperidinyl and pyrrolidinyl-9-xanthenylamines which are inhibitors of gastric acid secretion.


23
David C Heckert, David M Watt Jr: Organosilane-containing detergent composition. The Procter & Gamble Company, C R Wilson, R B Aylor, T H O Flaherty, January 25, 1977: US04005028 (59 worldwide citation)

A detergent composition containing an organosilane is capable of imparting soil release benefits to hard surfaces washed therewith. Soil adheres to such surfaces less strongly thereby making them easier to clean. The detergent composition can be formulated for use in a wide range of applications, e. ...


24
Rudolf Gorike: Headphone. AKG Akustische u Kino Gerate Gesellschaft m b H, McGlew and Tuttle, January 25, 1977: US04005278 (58 worldwide citation)

The headphone preferably comprises a toroidal seal ring which rests against or surrounds the user's ear and is constituted of a soft, yielding, and preferably elastic material. The seal ring, with the headphone positioned on the head of a user, forms a coupling space between an active diaphragm, act ...


25
Charles M Cleaveland: Vacuum-type circuit interrupters having heat-dissipating devices associated with the contact structures thereof. Westinghouse Electric Corporation, Willard R Crout, January 25, 1977: US04005297 (58 worldwide citation)

Vacuum "bottles", or vacuum-type circuit interrupters are provided having heat pipes, or reflux condensers provided in the contacts and contact-stems thereof, to remove the generated heat from the interior of the vacuum-interrupter envelope at the contacts to the external parts of the interrupter, a ...


26
David P Bloomfield: Pressurized fuel cell power plant. United Technologies Corporation, Stephen E Revis, January 25, 1977: US04004947 (57 worldwide citation)

A fuel cell power plant for producing electricity uses pressurized reactants in the cells. In one embodiment air is the oxidant and is compressed in a compressor driven by a turbine. The turbine is powered by waste energy produced in the power plant in the form of a hot pressurized gaseous medium. F ...


27
Philippe Racine, Jean Claude Higelin, Roland Engelhardt, Wolfgang Mindt: Apparatus for measuring substrate concentrations. Hoffmann La Roche, Samuel L Welt, George M Gould, January 25, 1977: US04005002 (57 worldwide citation)

The concentration of substrates of enzyme reactions is measured by determining the current produced at a platinum or gold electrode by oxidizing an acceptor utilizing a measuring device comprising a measuring cell, an enzyme electrode in contact with the fluid sample and containing a platinum or gol ...


28
William Emil Dreyer: Cable lock for small appliances. Lowe King Price & Markva, January 25, 1977: US04004440 (56 worldwide citation)

A compact device for locking an article, such as an office machine, to a desk or fixed base comprises a flexible cable secured at one end to a key-operated lock, and at the other end to an anchor block. The anchor block is in turn secured to the desk with a one-way screw. The lock is engageable with ...


29
Lawrence C Lynnworth: Ultrasonic measuring system with isolation means. Panametrics, Kenway & Jenney, January 25, 1977: US04004461 (56 worldwide citation)

A device for performing ultrasonic measurements on liquid flowing within a conduit having walls of relatively high acoustic impedance material. The conduit is split into two separate segments with the emitting transducer in one segment and a receiving transducer in the other segment. The space betwe ...


30
Earl Lee Fischer: Clip and indexing mechanism for a gas-operated gun. Minnesota Mining and Manufacturing Company, Alexander Sell Steldt & DeLaHunt, January 25, 1977: US04004566 (55 worldwide citation)

A clip and indexing mechanism for a gas-operated gun which affords the visible inspection and incremental advancement and insertion of projectiles from the clip into the chamber of the gun. The clip is formed with a long narrow rectangular web across which are positioned parallel spaced cylindrical ...