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The photographic news
- Bandzählung
- 29.1885
- Erscheinungsdatum
- 1885
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- Englisch
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- F 135
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- Hochschule für Grafik und Buchkunst Leipzig
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- Hochschule für Grafik und Buchkunst Leipzig
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- Bandzählung
- No. 1400, July 3, 1885
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Zeitschrift
The photographic news
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Band 29.1885
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- Register Index III
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Band 29.1885
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426 THE PHOTOGRAPHIC NEWS. [July 3, 1885. Patent Untelligente. Applications for Letters Patent. 7682. George Bernard Seibert, Suffolk House, Lawrence Pountney Hill, Cannon Street, London, for “A new or im proved frame for photographic sensitive plates.”—24th June, 1885. 7720. Thomas Arthur Monysox, 115, St. Vincent Street, Glasgow, for “ Improvements in photographic printing.”— 25th June, 1885. 7764. Fredric James Egerton Hine, 4 and 5, Arcade Chambers, Corporation Street, Birmingham, for “ Improve ments in picture frames.”—26th June, 1885. 7828. William Joseph Butler Humphreys, 186, Fleet Street, London, E.C., for “ Improvements in photographic shutters.” —27th June, 1885. Patent which has become Void through Non-pay ment of the Fourth Year’s Renewal Fee. 1881—No. 1214. R. Sherwin, &c., “ Holding photographs, &c.’’ Patents Sealed. 0461. Alexander Melville Clark, of the firm of A. M. and Wm. Clark, 53, Chancery Lane, Middlesex, Fellow of the Institute of Patent Agents, for “ An improved panoramic photograph camera.”—A communication to him from abroad by Paul Moessard, 11, Boulevard Magenta, Paris, France, Captain of Engineers.—Dated 26th June, 1884. 10,334. James Sturrock, Bank Street, Dundee, Forfarshire, N.B., for “ Improvements in washing-baths for photographic purposes.”—Dated 19th July, 1884. Patent Granted in America. 319,975. William Hill and Thomas R. Wilson, Salt Lake City, Utah, “Photographic printing apparatus.”—Filed July 15, 1884. (No model.) Claim.—1. In a photographic printing apparatus, the combi nation of a multifaced cylinder, a holder placed to retain a nega tive upon one face of the cylinder, a motor connected for rotating the cylinder, and mechanism operated by clock-work for releasing and stopping the cylinder, substantially as described. 2. In a photographic printing apparatus, the combination, with a cylinder carrying the sensitive paper, and fitted for rota tion by a motor, of a trigger for arresting the movement of the cylinder, and a regulator rotated by clockwork and acting to release the trigger at intervals, substantially as described. 3. In a photographic printing apparatus, the combination of the cylinder B, formed with faces b, the frame s carrying the negative, the cam-ring e, and the grooved rollers v, attached to the frame carrying the negative, substantially as described. 4. In a photographic pi inting apparatus, the frame s, pins s', springs t, and rollers v, combined with the rotating cylinder B and cam-rings t, substantially as described, for operation as speci fied. 5. In a photographic printing apparatus, the combination of the rotating cylinder B, trigger f, hammer k, latch m, and the tripping-arm n, substantially as described. 6. In a photographic printing apparatus, the combination of arms n »‘, carried by one arbor, and the rotating disk h, provided with fingers for engaging the arm n' with the rotating cylinder B, and a trigger released by movement of the arms »«', sub stantially as described. 7. In a photographic printing apparatus, the combination of rotating cylinder B, disk h, rotated by clockwork and provided with fingers i, and the trip-arm h', operating by its movement to release the cylinder, substantially as described. 8. In a photogiaphic printing apparatus, the time-regulator b, provided with spring-fingers i, combined with a clockwork ar ranged to rotate the regulator, substantially as described. 9. In a photographic printing apparatus, the combination of a rotating cylinder and a time-regulator rotated at varying speeds for releasing and stopping the cylinder at intervals, substantially as described. 10. In a photographic printing apparatus, the combination of the excentric wheelp, pinion p', and geiring q, with the clock work 0, arbor g, and disk h, substantially as and for the purposes specified. 11. In a photographic printing apparatus, the combination, with the rotating cylinder B, of the bell b", hammer a%, and arm c", substantially as described. 12. The combination, in a photographic printing apparatus, of a cylinder geared to a motor, a time-regulator having a constant rotation by a separate motor, and mechanism actuated by the regulator to release and then stop the cylinder, substantially as described. POSITIVES ON GELATINO-CHLORIDE OF SILVER. BY W. M. ASHMAN AND R. OrFORD. Fifth Article. Before proceeding to detail the methods of coating paper, we desire to draw attention to an error which occurred in our last article upon this subject. In the remarks re garding the formation of silver tartrate emulsion, page 294, 2nd column, 45th line, we represent the quantity of gela tine required as 14 grammes instead of 1-4 grammes; doubtless to the experienced experimentalist, and to those who have carefully followed the series, the mistake would be understood, but those who have had no experience with emulsions of this kind, and who might be induced to commence at any stage of the series, are entitled to our utmost consideration. Had a novice, for instance, taken those printed proportions, he would necessarily have met with failure, owing to the absurdly large quantity of gela tine named. Again, on page 295, 2nd column, 16th line, the sodium acetate and calcium chloride toning method does not appear to be clearly distinguished from Maxwell Lyte’s borax bath, owing to the insertion of the former in brackets. The toning bath in question will be dealt with in detail in a future article. When choosing a sample of paper upon which to spread a coating of sensitive emulsion, it is well to bear in mind the liability to rough usage that prints may incur in their transit through the different operations of toning, fixing, washing, &c. Experience with silver printing on albumen has shown the necessity of having a well-sized paper support, in order effectually to check the production of cracks, tears, and defects of a like nature, which would be certain to ensue under the severe strain to which the papers have to be subjected. The chief objects to have in view are—first, a good basis for the emulsion, one not liable to absorb too much, and so spoil the brightness of the picture, the image being kept as much as possible on the surface ; and secondly, as pure a white ground as can be obtained. In the manu facture of carbon tissue, this is not such a necessity, partly owing to the elasticity of the pigmented gelatine, and
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