The Encyclopedia britannica; a dictionary of arts, sciences, and general literatureWith new maps, and original American articles by eminent writersWith American revisions and additions, bringing each volume up to date . instrumentality of this ^f;! f ^^ ^,f ^,i;°e1„per minute have lately been transmitted by Mr Preece between 4rfi^fco^r^ISS^etmprmen?rnTi%^^^^ ¥h\trnt^\^s::tt^htHfeLtbrl^^^^^^^^^ on the printing instrument or to close a loc. circuit bj means °^of the soft iron cor.^ and is pulled by a strong spring, the ten«»» i Hughess tyiie-printingtele-graph L E G R A P H 121 of which u ftdjQs
The Encyclopedia britannica; a dictionary of arts, sciences, and general literatureWith new maps, and original American articles by eminent writersWith American revisions and additions, bringing each volume up to date . instrumentality of this ^f;! f ^^ ^,f ^,i;°e1„per minute have lately been transmitted by Mr Preece between 4rfi^fco^r^ISS^etmprmen?rnTi%^^^^ ¥h\trnt^\^s::tt^htHfeLtbrl^^^^^^^^^ on the printing instrument or to close a loc. circuit bj means °^of the soft iron cor.^ and is pulled by a strong spring, the ten«»» i Hughess tyiie-printingtele-graph L E G R A P H 121 of which u ftdjQstt?a ou aa to b«: litttrlv t^ca] to the XLfifTietic attrac-tion. current is seLt ia the propor directioii lo ainiinisli thepow-er of the magnet and allow the spring to prepomierat*. A verypowerful action is thus obtained by means of a very small current,the actual work being done by motive-power in the instrumentitself. After the letter is printed the mechanism short-circuits themagnet and replaces the armatura automatically. The printingaction is as follows. The type-wheel W is carried round continu- American combination printing talegntph, because ipart of Hughess and part of Houses zh full sire. — HliL-Uesstyp*;:.;-.:.::. by the clockwork, to which it is attached through a frictionsleeve .which allows it to be stopped, and pushed backward or for-ward without stopping the mecTianism. Another shaft carryingthree pams is arranged so as to be locked into gear with the wheel-work when the armature leaves the poles of the magnet. The camsthen come into action in rotation ; the first moves the adjustmentlever, shown to the left of W in the 6gure, which pushes a wedge-shaped piece into the teeth of the type-wheel and adjusts it exactlyto the proper position for printing; the second cam presses the paperagainst the type ; the third moves forward the paper ; a fourth camreplaces the armature of the magnet and relieves the cam shaft,leaving the i
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Keywords: ., bookcentury1800, bookdecade1890, bookidencyclopedia, bookyear1892
