. Supplément au dictionnaire de Spons, génie civil, mécanique, militaire et naval. Un cercle d'teethupon T pignon, avec dents correspondantes sur la roue de type k, et les deux tournent ensemble tant quele contact dure entre le papier et le type, de sorte que l'alimentation du papier est accomplishedwhile l'impression est en cours. Les types sont encrés par un rouleau de feutre K. L'unisson stopP est employée par l'opérateur d'arrêter la roue de type à zéro ou d'un tiret, au démarrage.Il est secoué le genre de roue et libérés à la premier mouvement par l'une des broches hh le strikingagainst

• Contributeur: The Reading Room / Alamy Banque D'Images
• ID de l’image: 2AFX1DF
• Taille du fichier: 7,2 MB (210,7 KB Téléchargement compressé)
• Autorisations: Modèle - non | Propriété - non
• Dimensions: 1877 x 1332 px | 31,8 x 22,6 cm | 12,5 x 8,9 inches | 150dpi

Informations supplémentaires

Cette image appartient au domaine public, ce qui signifie que le droit d’auteur a expiré ou que le titulaire du droit d’auteur a renoncé à ses droits. Les frais facturés par Alamy couvrent l’accès à la copie haute résolution de l’image.

Cette image peut avoir des imperfections car il s’agit d’une image historique ou de reportage.

. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. A circle of teethupon T gear, with corresponding teeth k on the type wheel, and the two revolve together as long asthe contact lasts between the paper and the type, so that the feeding of the paper is accomplishedwhile the impression is taking place. The types are inked by a felt roller K. The unison stopP is employed by the receiving operator to arrest the type wheel at zero or dash, when starting.It is thrown off the type wheel, and released at the first movement by one of the pins hh strikingagainst the projection on the upper surface of the lever. The bar L supports the platen and itsattachment; it is pushed back, so as to throw the impression lever out of gear with the printingwheel, when sending. Phelps electro-motor printing telegraph, largely used by the Western Union Telegraph Co., U.S., has the type wheel and printing mechanism operated by a local battery. This construction enablesthe working parts to be made much stronger than in the Hughes instrument, where the moving 2 o. 562 ELECTEICAL ENGINEERING. parts must necessarily be light. These parts consist of a transmitter with keyboard for closing thecircuit, the receiver or printing mechanism, containing apparatus for maintaining unison auto-matically, the electro-motor, and the governor for speed. The transmitting apparatus and thetype wheel of the receiving instrument are caused to revolve synchronously, under control ofthe governor, and each letter is printed by a single pulsation of the electric current, of determinedand uniform length, transmitted at a given time. The motion of the type wheel is arrestedwhile each letter is being printed, and is automatically released, the instant the impressionhas been eifected. By this means a greater speed of revolution is given to the type wheelthan it would be possible to attain by a step by step movement, and aleo letters which happento come in direct sequence upon the keyboa

Recherche dans la banque de photos par tags

• bookcentury1800
• bookdecade1870
• bookyear1879
• livresubjectenginee