Castellion George Augustus: (ec) Mirror which rapidly changes reflectivity. American Cyanamid Company, Fickey Charles J, April 30, 1974: US3807832 (243 worldwide citation)

Electro-optical device useful in modulation of reflected light, and the like, typically comprising an electrochromic device containing a reflecting mirror surface, said electrochromic device being a sandwich arrangement of a transparent electrode, an electrochromic layer, a reflecting and support la ...

Mathauser William R: Magnetic self-aligning quick-disconnect for a telephone or other communications equipment. Shoemaker and Mattare, April 30, 1974: US3808577 (204 worldwide citation)

A quick-disconnect, magnetic, self-aligning telephone jack or other communication equipment connection, including a male connector half and a female connector half, each with self-aligning magnetic means therein to hold the male and female halves together and cooperating electrical contact means in ...

McDonald Bernard: Surgical retractor. Christie Parker & Hale, April 30, 1974: US3807393 (202 worldwide citation)

This surgical retractor has a pair of opposed slat-like sides interconnected at their respective ends with divergence at both ends so that the slats are elastically bowed in arcuate paths with the concave sides of the slats facing each other. Each of the slats has cooperating ratchet and pawl arrang ...

Johnson Lyle F: Self-locking coupling nut for electrical connectors. Matrix Science Corporation, Nilsson Robbins & Berliner, April 30, 1974: US3808580 (158 worldwide citation)

An electrical connector adapted to be secured to a mating electrical connector. A first member extends outwardly from the connector shell with indentations formed on a radially extending surface of the first member. A coupling nut is axially aligned with the connector and surrounds a portion of the ...

Schweizer Edward E: Suture applicator. April 30, 1974: US3807407 (157 worldwide citation)

A surgical instrument for mechanically suturing an incision or wound comprising first and second pivotally interconnected jaw elements, a replaceable suture magazine containing a single looped suture, the free ends of which are provided with short needles, means on said first jaw for supporting said ...

Sharaf Harold M: Method of testing the capacity of a lead-acid battery. Anderson Power Products, Chittick Thompson & Pfund, April 30, 1974: US3808522 (139 worldwide citation)

A method of testing the capacity of a lead-acid battery where the internal resistance of the battery is initially measured when the battery is relatively young and the internal resistance is subsequently measured periodically. By comparing the values obtained on these subsequent measurements with th ...

Karnopp Dean C, Crosby Michael J: System for controlling the transmission of energy between spaced members. Lord Corporation, Wright Esq James W, April 30, 1974: US3807678 (132 worldwide citation)

The system is semi-active and includes a passive isolator and an active damper coupled in parallel between spaced members. The damping characteristics of the damper are actively varied as a function of some control condition such as displacement, velocity, acceleration or the like for generating an ...

Graham George A, Luce Nunzio A, Zanoni Louis A: Electro-optic cell having a liquid isolated from its hermetic sealing means. Optel Corporation, Spivak Joel F, April 30, 1974: US3807833 (126 worldwide citation)

A liquid crystal cell comprises a transparent top support plate having a transparent conductive coating thereon, a bottom support plate smaller than the first support plate and having a reflective conductive coating on one surface thereof and a black coating on its opposite surface is centered with ...

Kniff Thomas J: Impacting tool with tungsten carbide insert tip. Kennametal, Crosby Melvin A, April 30, 1974: US3807804 (126 worldwide citation)

An impacting tool in which a massive hard carbide element is fitted to a steel holder which is reciprocated to drive the element against a formation to be broken. The massive carbide element can be press fitted in the steel holder or shrink fitted therein or brazed thereto and, furthermore, the carb ...

Smith George H: Photosensitive material containing a diaryliodium compound, a sensitizer and a color former. Minnesota Mining and Manufacturing Company, April 30, 1974: US3808006 (119 worldwide citation)

A photosensitive admixture comprising a diaryliodonium compound and a compound capable of sensitizing 2-methyl-4,6-bis(trichloromethyl)-s-triazine.