Cyclopædia of useful arts & manufactures, ed. by C. Tomlinson. 9 divs, Volume 7George Virtue, 1852 |
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Pagina 457
... Plates , dishes , saucers , cups , and hand basins are now made by the process of flat - ware pressing , an operation which is conducted as fol- lows : -a plate being taken as an example . The plate - maker stands at a bench before a ...
... Plates , dishes , saucers , cups , and hand basins are now made by the process of flat - ware pressing , an operation which is conducted as fol- lows : -a plate being taken as an example . The plate - maker stands at a bench before a ...
Pagina 465
... plate . From this the colour is transferred , with a leathern muller , to engraved copper - plates also made hot , the superfinous colour being scraped off with a pallet knife , and the surface cleaned with a dossil . The workman then ...
... plate . From this the colour is transferred , with a leathern muller , to engraved copper - plates also made hot , the superfinous colour being scraped off with a pallet knife , and the surface cleaned with a dossil . The workman then ...
Pagina 471
... plate engraving the paper is forced into the lines or letters of the copper - plate . There is yet a third mode , called surface - printing , of which lithography and zincography are examples , in which the lines or letters are written ...
... plate engraving the paper is forced into the lines or letters of the copper - plate . There is yet a third mode , called surface - printing , of which lithography and zincography are examples , in which the lines or letters are written ...
Pagina 483
... plate let into obliquely against the gallows . The frisket is then the top of the platten . When the pressman pulls lifted up on its hinges , and supported by a slip of the handle I , he turns the spindle , the round of wood descending ...
... plate let into obliquely against the gallows . The frisket is then the top of the platten . When the pressman pulls lifted up on its hinges , and supported by a slip of the handle I , he turns the spindle , the round of wood descending ...
Pagina 489
... motion imparted to it by means of a catgut band passing round two pulleys , one of which , p , is attached to the axis of d , and the other to the axis of the printing cylinder P ' . A horizontal plate of metal PRINTING . 489.
... motion imparted to it by means of a catgut band passing round two pulleys , one of which , p , is attached to the axis of d , and the other to the axis of the printing cylinder P ' . A horizontal plate of metal PRINTING . 489.
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Cyclopædia of useful arts & manufactures, ed. by C. Tomlinson. 9 divs, Volume 7 Cyclopaedia Visualizzazione completa - 1852 |
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acid alkali allow ammonia boiling bottom brine called carbonate carbonic acid carriage centre chloride clay colour consists contains copper crystals cylinder diameter edge engine engraving equal evaporation feet fixed force frame gluten heat holes horizontal inches iron length letters lever lime machine manufacture means metal motion mould moving nitric acid obtained oxide paper passing pieces pipe piston placed plane plate porcelain portion potash pressure printing produced proportion Prussian blue prussiate of potash pulley pump purpose quantity rails railway raised road rollers rope round sal ammoniac screw sewers sheet ship shown in Fig side silicates silk silkworm silver slate soap soda solder soluble solution space starch steam stone strands substance sulphate sulphuric acid surface temperature thick thread timber tion tube upper valve velocity vertical vessel vis viva weight wheel wood yarns
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Pagina 490 - ... for a fresh coat of ink, which itself again distributes, to meet the ensuing sheet, now advancing for impression ; and the whole of these complicated acts is performed with such a velocity and simultaneousness of movement, that no less than 1,100 sheets are impressed in one hour.
Pagina 490 - Times newspaper, which were taken off last night by a mechanical apparatus. A system of machinery almost organic has been devised and arranged, which, while it relieves the human frame of its most laborious efforts in printing, far exceeds all human powers in rapidity and dispatch.
Pagina 490 - ... little more remains for man to do than to attend upon and watch this unconscious agent in its operations. The machine is then merely supplied with paper, itself places the...
Pagina 494 - The type form fixed on the central drum moves at the rate of 70 inches per second, and the paper is moved in contact with it of course at exactly the same rate. Now, if by any error in the delivery or motion of a sheet of paper it arrive at the printing cylinder...
Pagina 518 - ... pressure whatever can force a passage. We shall recur to this again when describing the various contrivances of valves, &c. What we have said is enough for supporting our directions for constructing a. tight piston. But we recommend thick and strong leather, while our present reasoning seems to render thin leather preferable. If the leather be thin, and the solid piston in any part does not press it gently to the barrel, there will be in this part an unbalanced pressure of the incumbent column...
Pagina 584 - ... and managing machines of that kind . A mob assembled and pulled the mill to pieces, but the damage was made good by the nation, and some of the rioters were punished. A new mill was afterwards erected, which was suffered to work without molestation, and which gave occasion to the erection of others. It appears, however, that this was not the only mill of the kind then in Britain, for one driven also by wind had been built at Leith, in Scotland, some years before.
Pagina 490 - ... little to add. Sir Christopher Wren's noblest monument is to be found in the building which he erected ; so is the best tribute of praise which we are capable of offering to the inventor of the printing machine, comprised in the preceding description, which we have feebly sketched, of the powers and utility of his invention. It must suffice to say further, that he is a Saxon by birth ; that his name is Koenig ; and that the invention has been executed under the direction of his friend and countryman,...
Pagina 656 - When the water is raised to the top it is received in channels on each side, which extend the whole length of the building ; from these long channels it is made to pass into smaller ones by the side, from which it trickles through a multitude of small holes, like a very gentle shower, upon the fagots, where it is divided into an infinite number of drops falling from one point to another.
Pagina 490 - Our journal of this day presents to the public the practical result of the greatest improvement connected with printing, since the discovery of the art itself. The reader of this paragraph now holds in his hand one of the many thousand impressions of The Times Newspaper, which were taken off last night by a mechanical apparatus. A system of machinery, almost organic, has been devised and arranged, which, while it relieves the human frame of its most laborious efforts in printing, far exceeds all...
Pagina 652 - In doing this, the men employ picks of the common description ; working horizontally, so as to form a roofing of the rock, and making this as plane as possible. From its situation, a few feet above the purer part of the stratum, the rock obtained during this process is usually of inferior quality, and is for the most part employed in the refineries. The depth of the workings from the roofings depends in a great measure on the nature of the stratum, and the proportion of it occupied by the rock of...