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Updated: May 4, 2025
This answers a triple purpose; it coats the mould with graphite, wets it ready for the bath, and expels air bubbles from the letters. This process prevents entirely the circulation of blacklead in the air, which has heretofore been so objectionable in the process of electrotyping.
Photo engineering, electrotyping, lithography, typewriting; telescopes of all kinds from tiny ones up to ones that weigh four thousand pounds. The latest medical and surgical instruments.
This dynamo, as is well known, differs from those of Gramme and Paccinotti chiefly in the longitudinal winding of the armature, and it is unnecessary to describe it here. It has been adapted by its inventors to all kinds of electrical work, electrotyping, telegraphy, electric lighting, and the propulsion of vehicles.
By Wednesday night the equipment was fully installed and the workmen departed, leaving only Jim McGaffey, an experienced pressman, and Lawrence Doane familiarly called Larry who was to attend to the electrotyping and "make-up." The press was of the best modern construction, and folded, cut and counted the papers automatically, with a capacity for printing three thousand copies an hour.
The principal movements have been in stereotyping, electrotyping, the improvement of presses, and the application of steam power. Stereotyping is the transfer of pages of movable type into solid metal plates, by the medium of moulds formed of plaster of Paris, papier-mâché, gutta-percha, or other substances.
From them papier maché impressions are taken and bent into a curve, so that the casts made from them will fit the cylinders of the printing presses. In electrotyping, an impression is taken from the die in wax or gutta percha. The surface of this impression is coated with powdered plumbago.
Our scientific chief had discovered a process something like what is called electrotyping nowadays, as I imagine. He was very proud of this; but he was prouder still of the ring of his metal, and with reason: it must have been a nice ear indeed that could discover the false tones in the doctor's coinage.
The example of the cheap watch industry may be cited to convey an idea of the immensely important revolution which will take place in the production of both small and large prime-motors when all the possibilities of electrotyping, casting, and stamping the various wearing parts true to shape and size have been fully exploited.
One thing should always be borne in mind in electrotyping Daguerreotype plates that in order to secure a perfectly coated surface, the plate should be perfectly cleaned. In this point, many who have tried the electrotype process have failed, attributing their ill success to other than the proper cause. The following process possesses some interest, and is worthy a trial from operators.
Then he said: "Fitzgerald and Doane tell me they're going to quit, Saturday." "It is true," replied Patsy. "I'm sorry, for they seem good men and we may have trouble replacing them." "They are not needed here, Miss Doyle," said Smith. "There isn't a great deal of electrotyping to do, or much job printing. More than half the time the two men are idle. It's the same way with my own job.
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