Obsolete non-BS types AC power plugs and sockets: British and related types

-


wylex 13 plug. note offset line pin (top of photograph).


wylex plug

george h. scholes ltd. of manchester first introduced plugs hollow round earth pin between rectangular current-carrying pins in 1926 under wylex brand name, prior first british standard earthed plugs. wylex plugs made in 3 ratings, 5 a, 10 a , 15 a , unpolarized (the current carrying pins on same centre line earth pin). in 1933 asymmetric polarized version introduced, line pin offset centre line. in 1934 dual plug system introduced socket rated @ 15 a , 3 sizes of plug, fused 2 a , 5 a plugs , 15 a plug. 15 a dual plug incorporated socket narrower apertures standard wylex 15 a socket, accepted narrow rectangular pins of lower-rated plugs. introduction of 13 a fused plug, rated 3 kw., enabled scholes propose system possible solution new standard competing dorman & smith round pin solution, not selected , new bs 1363 design prevailed. wylex sockets used in council housing , public sector buildings and, short time in private housing. particularly popular in manchester area although installed throughout england, in schools, university accommodation, , government laboratories. in london schools built in 1960s used low-voltage ac sockets, typically 12 v, 5 a transformer serving 1 or more laboratories, microscope lamps etc. wylex plugs , sockets continued manufactured several years after bs 1363 sockets became standard, , commonly used banks , in computer rooms during 1960s , 1970s uninterruptible power supplies or clean filtered mains supplies.


dorman & smith (d&s)

3 d&s sockets mounted on panel


made dorman & smith ltd. (using patents applied in 1943) plugs , sockets rated @ 13 a , 1 of competing types use on ring final circuits. never popular in private houses deployed in prefabricated houses , council housing. bbc used them. local authorities continued use them in new installations until late 1950s. many d&s sockets still in use until 1980s, although difficulty in obtaining plugs them after around 1970 forced users replace them bs 1363 sockets. d&s plug suffered serious design fault: line pin fuse screwed plug body , tended come unscrewed on own in use. fuse worked loose end protruding socket, electrically live , posing shock hazard, when plug removed.








Comments

Post a Comment

Popular posts from this blog

1940-1941 Pontiac Torpedo

-
1941 pontiac streamliner torpedo 8 sedan coupe (b-body) 1941 pontiac deluxe 6 or 8 torpedo 2-door sedan (a-body) 1941 pontiac deluxe torpedo 8 metropolitan sedan (a-body) in 1940, pontiac introduced torpedo on general motors c-body. along oldsmobile, pontiac had distinction of having 3 of gm s mainstream platforms year, last 1 more year. new c-body 1940 pontiac torpedo shared cadillac series 62, buick roadmaster , super, , oldsmobile series 90 featured cutting-edge torpedo styling. shoulder , hip room on 5 in (127 mm) wider, running boards eliminated , exterior streamlined , 2–3 in (51–76 mm) lower. when combined column-mounted shift lever cars offered true 6 passenger comfort. these changes had been influenced cadillac sixty special. the 1940 torpedo had larger windows , wider seats other pontiacs, front , rear ventiplanes on 4-door sedans , long gracefully streamlined rear decks. concealed hinges used on doors. doors wide. hood ornament had plastic indian head mounted in metal ba
Read more

1920–1923 List of 1920s jazz standards

-
1920 – avalon song written al jolson, buddy desylva , vincent rose. jolson introduced song, taking number 2 on charts in 1921, , used in musicals sinbad , bombo. song possibly written rose, jolson s popularity performer allowed him claim co-credit. opening melody taken giacomo puccini s aria e lucevan le stelle opera tosca, , composers sued puccini s publishers in 1921 $25,000 , subsequent royalties. 1920 – margie song composed con conrad , j. russel robinson lyrics benny davis. introduced original dixieland jazz band , popularized eddie cantor s 1921 recording. song 1 of first hits both conrad , davis, , later used in films margie (1946) , eddie cantor story (1954). name inspired cantor s five-year-old daughter. song known little margie . 1921 – sheik of araby song composed ted snyder lyrics harry b. smith , francis wheeler. written in response popularity of rudolph valentino film sheik. club royal orchestra introduced song on first recording in 1921. 2 recordings of trombonist
Read more

Sovereign Building Zollinger-Harned Company Building

-
the sovereign building in 2011 the whitehall mall store sold leh s department store, several years flagship store on hamilton street in allentown remained vacant. added national register of historic places in 1979. in december 1982 allentown store purchased sovereign realty , development. building renovated , reopened sovereign building in may 1984. renovations included glass-arched entrance pedestrian plaza between hamilton , court streets leading grapefruit-domed lobby decor of antique brass, mirrors, greenery , wing-backed chairs. main floor , basement developed retail spaces, while upper floors turned 42 private office suites. sovereign later went financial difficulties , building sold @ sheriffs sale on 22 september 1989. today building operated office building owner resides in philadelphia.
Read more