The photographic news

• Bandzählung: 35.1891
• Erscheinungsdatum: 1891
• Sprache: Englisch
• Signatur: F 135
• Vorlage: Hochschule für Grafik und Buchkunst Leipzig
• Digitalisat: Hochschule für Grafik und Buchkunst Leipzig
• Digitalisat: SLUB Dresden
• Rechtehinweis: Public Domain Mark 1.0
• URN: urn:nbn:de:bsz:14-db-id1780948042-189100009
• PURL: http://digital.slub-dresden.de/id1780948042-18910000
• OAI: oai:de:slub-dresden:db:id-1780948042-18910000
• Sammlungen: LDP: Historische Bestände der Hochschule für Grafik und Buchkunst Leipzig
• Sammlungen: Fotografie
• Strukturtyp: Band

• Digitalisat: SLUB Dresden
• Strukturtyp: Ausgabe

September 4, 1891.] THE PHOTOGRAPHIC NEWS. 631 To prepare the glass for transferring, proceed as follows :— Clean the glass plate thoroughly with alcohol by means of a ball of clean cotton ; dry it well; wash it with turpentine ; dry it off again ; place the glass or plate upon a smooth elastic layer (such as flannel), and with this elastic layer upon a table, or, better yet, upon a rubber blanket in the lithographic hand press. Now coat the cleaned surface with a thin coat of half turpentine and half dammar varnish ; let it dry from ten minutes to one day, according to temperature and thickness of dammar varnish. The coating should not be allowed to dry entirely ; it should be a trifle sticky. Lay the impression face downward upon the glass plate ; it is important that neither water nor acid touch the surface during the entire pro cess. To properly lay down the impression, take it up with both hands by holding the left-hand under-corner and the right-hand upper-corner. Be careful not to get any air-bubbles under the sheet. This is best accomplished by marking upon the plate the exact position and size of the sheet. Press the sheet to the adhesive dammar coat; this may be done in many different manners. It does not require a very strong pressure, but it should be observed that each and every spot has to be pressed repeatedly against the plate. We advise the use of a small rubber ruler, or a blotter ruler, or any similar instrument. You may also use the hand, but, of course, not with much safety ; or a dabber of cotton or rags, or an ivory paper folder. When the paper sticks quite smoothly to the plate, fan it perfectly dry, and then, with tret finger tips, slowly rub off the paper, and the print, of whatever colour or nature it may be, will remain on the glass plate. Upon this apply another coat of dammar varnish containing very little turpen tine (with too much turpentine you run the risk of washing the entire picture from the plate again). If all our rules are followed, a splendid picture will be obtained, which can be washed and cleansed with water the same as a window, as often as desired, and the transfer will not be injured thereby. Such a picture will be visible from outside of the glass, day and night, the same as any glass painting. patent Intellgente. Applications for Letters Patent. 14,278. L. M. Konos, 18, Buckingham Street, Strand, London, " Improvements in or relating to Shutters for Photographic Cameras.”—August 2Ath. 14,336. Charles Walker Clarke, 32, Market Place, Devizes. “ Improvements in Photographic Apparatus.”—August 25th. 14,536. Benjamin Joseph Edwards, 45, Southampton Build ings, London, “ Improvements relating to Photographic Cameras and to Apparatus for use in connection therewith.” August 23th. 14,556. Leon BERTEAU and Henri Roussel, 55, Chancery Lane, London, “Improvements in Shutter Apparatus for Regulating the Admission of Light for Photographic Pur poses.”—August 23th. 14,648. Arthur Rayment and Georoe Lyons, 34, Southamp ton Buildings, Chancery Lane, London, “ Improvements in Photographic Cameras.”—August 29th. Specifications Published. 4,956. March 29th, 1890.—“ Rapid Printing Apparatus.” W. F. Greene, 92, Piccadilly, and F. H. Varley, 82, New ington Green Road, both in London. The film is fed from the sensitising tank or direct from a sensitised roll between the rollers, and under a guide roller through the printing frame. In this is fitted an under negative and an upper movable negative, through which the film is simultaneously exposed on both sides. The upper negative is actuated by toggle-levers, which are worked from eccentrics on a shaft, being thus intermit tently lifted to permit the film to be fed forward. The film next passes over rollers, between which works a roller on oscil lating spring levers, by which the film is withdrawn from the printing frame and held taut. The film then passes through developing, toning, fixing, and washing tanks, provided with suitable feeding or squeegeeing rollers, These, with the cor responding rollers, are actuated through suitable gearing by an oscillating sector lever. The film is finally wound on a roll mounted on a frictional hub driven from the last of squeegee ing, &c., rollers. The exposure in the printing frame is effected by perforated shutters, which slide over apertures in the ends of the frame, being actuated by a crank disc. 5,046. April 1st, 1890.— “ Cameras and Change-Boxes and Lens Fittings.” W. B. Luce, Boston, Massachusetts, U.S.A. The camera has internal grooves at the sides to receive the plates, which are held in opaque holders. In the lower part of the camera slides the lens tube, which is of such length that a plate placed immediately behind the open inner end will be exactly in focus. The plates are, before exposure, held in the upper part of the camera, being supported by the lens tube, which, to expose the plates, is moved outwards to allow the plates to drop in succession. The lens tube may be threaded, or it may slide in a stuffing box, or it may be surrounded on the outside by a light-tight bellows. “Sheaths.”—The holders are preferably of sheet metal having flanges at the top and bottom. 5,158. April 2nd, 1890.—“ Change-Boxes and Dark Slides.” C. H. Stanbury, 91, Fleet Street, London. The change-box consists of a case fitted with a number of slides between which the sensitive plates are placed. The slides are fitted with numbered tabs to indicate the number of plates exposed. To transfer the plates into the dark slide, the box and dark slide are put into position, and the lower slide of the box and the upper one of the dark slide are withdrawn. The plates, when exposed, are returned in a similar way to the top of the box. The dark slide is provided with a slide or shutter for exposure. In a modification the plates are placed in sheaths with V ends, in which case only top and bottom slides are used, and they are provided with V ends to facilitate insertion between the sheaths. 5,193. April 3rd, 1890.—“ Cameras and Change-Boxes.” G. Dickinson, 144, Morley Avenue, Noel Park, London, N. The plates are inserted through the back of the camera into grooves formed in the top and bottom. From thence they are withdrawn into position for exposure by inclining the camera so as to drop them in succession into a groove in a turntable, which is then rotated so as to bring the plate into a transverse position. The handle by which the turntable is rotated works in connection with a notch indicator, which serves also to secure the handle. A spring clip, actuated by a milled thumb-piece, serves to retain the plate in the slot. The plate registers against inclined, velvet-covered strips, which serve to shut out the light from the remaining plates. Corresponding with the groove is a vertical plate, which may be provided with a focussing screen. The distance of the object being known, it is focussed by turning a pointer to a certain number in the graduated arc, 5,215. April 3rd, 1890.—“ Shutter.” F. Beauchamp, The Poplars, Chadwell Heath, Essex. The shutter consists of a slide, which is worked up and down by a crank-pin fixed on a crank disc in a slit between the lenses. The shutter is attached to the lens by means of a split ring, which is clamped on the lens tube by a screw. The crank, which is actuated by a coiled spring, is released by lifting a detent lever, which is lifted clear of the crank for rapid expo sures, but only partly—so as to catch the crank and hold open the lens—for slow exposure. The time of exposure is regulated either by forcing a brake disc againt the face of the crank disc by a regulating screw, or by connecting the crank to the axis of a rotary air-pump, the outlet of which is regulated by a valve. To give several exposures with one winding of the actuating spring, an escapement is used for releasing and stopping the crank at each revolution, and the range of the spring may be increased by toothed gear. Hackney Photographic Society.—Arrangements for Sep tember :—10th, “A Holiday in Isle of Man and Ireland,” W. Fenton Jones ; 13th, Excursion ; 24th, Members’ lantern night; 26th, Excursion to Wanstead Park—meet at Leytonstone Station at 2.45 p.m.