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The photographic news
- Bandzählung
- 35.1891
- Erscheinungsdatum
- 1891
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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. 1720, August 21, 1891
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The photographic news
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Band 35.1891
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Went Intellgence. Applications for Letters Patent. 13,466. Travis Burton, 106, Cowhill, Chadderton, Oldham, " Improved Walking Stick Tripod Stand for Photographic Surveying or other purposes.”—August 10th. 13,467. Edward Dunmore, 83, Corinne Road, Tufnell Park, London, “ A Repeat Photographic Dark Slide and Improved Camera Back.”—August 10th. 13,538. Adolphe Paul Auguste Beau, 23, Southampton Buildings, London, “ Improvements in Means or Apparatus employed in Photography.”—August 12th. 13,674. Alfred Charles Jackson, 33, Chancery Lane, London, “ Improvements in or connected with Photographic Shutters.”—August 13th. 13,686. Archibald Campbell, Southwell House, Southwell Gardens, London, “ An Improved Portable Photographic Camera and Stand Combined.”—A ugust 11th. 13,720. Joseph Sewell, Edward Holliday, and Alfred Ernest Willey, 12, Lawrence Lane, Cheapside, London, “ A Method of Producing on Veneer any Picture or Design in any Requisite Number of Colours.”—August llth. 13,737. Roland Smith, 1, Clapton Square, London, “Im provements in Photographic Hand Cameras.”—August Uth. 13,764. Alfred PUMPHERY, 128, Colmore Row, Birmingham, “ Improvements in Lantern Slides.”—August 15th. 13,765. George Frederick Lutticke, 23, Farquhar Road, Norwood, London, “ Improvements in Magic Lantern Slides.”—August 15th. 13,799. Ole Pedersen Olvik and Hans Olsen Morken, 4, South Street, Finsbury, London, “An Improved Apparatus for the Development of Photographic Pictures.”—August 15th. Specifications Published. 4,037. March lith, 1890.—“Pressure-Gauge.” A. T. Clark son, 28, Bartlett’s Buildings, Holborn Circus, E.C., and J. B. Spurge, 11, Reede Villas, North Street, Romford, Essex. “ Bourdon ” and other gauges are filled with a liquid or jelly, which is separated from the gas under pressure by a diaphragm or piston, and a valve that closes to prevent leakage of the gas when the diaphragm breaks. 4,094. March 15th, 1890.—“Lamps.” J. Walsh, 27, Chatto Road, Clapham Common, S.W. Lamp Lenses, <L-c. —Relates to the construction of liquid and other lenses, and to their application to lamp globes and chimneys ; and to railway carriage roof, street, and other lamps. The figure illustrates a liquid lens having flanges, which are heated and covered with cement. The lens, after immersion in water of the same temperature as the cement, is taken out and filled with water under pressure. It is then allowed to cool, and is hermetically sealed. 4,095. March 15th, 1890.—“Cyanides.” E. Bergmann, 31, Johannisbollwerk, Hamburg. Consists in producing cyanide of silver or copper by heating a ferrocyanide in neutral or acid solution with a silver or a copper salt. When cupric salts are used, reducing agents, such as sulphurous acids, sulphites, finely divided metals, or organic substances, must be added. Instead of soluble ferro cyanides, Prussian blue and other insoluble cyanides, raw cyanides from gas making, or ferricyanides, together with reducing agents, may be employed. Double cyanides are obtained by treating cyanide of copper with an alkaline or alkaline earthy sulphide, or with an alkaline ferrocyanide. Double salts are also obtained by treating barium-copper cyanide, obtained as above, with a sulphate or carbonate in aqueous solution. 4,178. March 17th, 1890.—“Photo-Mechanical Printing.” G. Balagny, Paris. The sensitive substance is spread on a flexible support, such as gelatine, collodion, celluloid, india-rubber, &c. It may be composed of bichromated gelatine, or gelatino-bromide treated with bichromate of potash, or the like. These flexible photo ¬ type plates can be employed instead of the bichromated slab ordinarily employed in photo-mechanical processes ; they are developed in a water bath, and stretched, and fixed to a rigid printing block of steel, stone, &c., by an adhesive substance, such as gelatine, dextrine, albumen, or the like. The plate is then inked and printed from in the usual way. A double im pression is obtained when both silver and bichromate is used. 4,207. March 13th, 1890.—“Advertising and Magic Lan terns.” S. J. Porter, 181, Strand, London. Magic Lanterns.—The advertisement slides are carried on a revolving perforated disc which is actuated by clockwork, the advertisements being cast on a white screen of opal, &c., which carries an accumulator for an eleetrio lamp, but gas or other light may be used. Correspondence. PERSPECTIVE DRAWING AND VISION. Sir,—It may save some discussion on a merely verbal matter if you will allow me to specify more precisely the meaning of an expression contained in the fourth paragraph of my commu nication in your last issue. The words “ vertical measure, as before stated, does not enter into the question of binocular perspective," are intended to apply to anything that may be stated of binocular perspective or vision as differing from the monocular. That this was the intention will probably be evident to anyone who reads the paragraph from the commencement. W. E. Debenham. roceedngs Of Societes, Enfield Camera Club. The ordinary meeting of this Club was held on the 12th inst., eleven members being present. The subject for the evening was “A Discussion on Negatives," and about one hundred negatives were brought by various members for mutual criticism. A couple of hours were very profitably spent in comparing notes with reference to exposures given, developers, &c. The president (Mr. D. G. Pinkney) brought with him the latest pattern of the Beck-Newman time and instantaneous shutter, and said he had used it during a recent holiday, and that it gave great satisfaction, exposures of a fractional part of a second being made with absolute certainty, and without any vibration. Photographers’ Benevolent Association. Meeting held at 55, Chancery Lane on the 14th inst., Mr. Jno. Spiller chairman. Present, Messrs. Berry, Freshwater, Atkinson, and Hon. See. Four applications for assistance con sidered and granted. Mr. W. J. Tabrum, solicitor, was elected assistant hon. sec. Miss Walker and Mr. Jas. Sharp, 16 and 17, Poultry, were elected subscribers. Note.—All subscriptions are now due, and will be gladly received, as the funds are very low. Richmond Camera Club. At the ordinary meeting on the 14th inst., Mr. Faulkner in the chair, Mr. Cembrano, as delegate of the Club at the late meeting of the Photographic Convention at Bath, read a concise but comprehensive report of the proceedings of the Convention, calling special attention to the recommen dation made by the lens standard committee with a view to securing uniformity in the matter of lenses, diaphragms, screws, and fittings of cameras, and winding up with expressions of warm appreciation of the kind reception which had been accorded to the Convention at Bath. The presenta tion of the report had been deferred for a fortnight to enable Mr. Cembrano to prepare his illustrations in the shape of lan tern slides, with the result that no less than 120 pictures were thrown upon the screen, the slides being for the most part the work of Mr. Cembrano himself, and the rest by Mr. H. M. Hastings. They covered the whole ground of the Convention’s rambles—Bath, Clifton, Bristol, Tintern, Chepstow, Salisbury,
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