The Optical Magic Lantern Journal (July 1900)
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92 The. Optical Magic Lantern Journal and Photographic Enlarger.
_PATENT.
The following List, relating to current Patent Applications, is compiled expressly for the ‘ Optical Magic Luntern Jvurnal" by W. P. Thompson & Co., Patent Agents, of 822, High Holborn, London, W.C., to whom all enquiries for further information should be addressed.
No. REcENT PaTEnT APPLICATIONS. 8870, 14th May, 1900. Peter Francis Barry and James ’ Morris Alderton. Improvements in coi:
freed photoscopes.
15th May, 1900. James Waddell. Improvements in or relating to optical instruments for range finding and measuring and surveying purposes.
15th May, 1900. Ernst Abbe. in lens systems. (Complete.)
15th May, 1900. David Genese. in acetylene lamps.
15th May, 1900. Robert Fulgora. An improved apparatus for displaying living pictures. (Complete.)
15th May, 1900. Edward Belcher Stringer. An improved fine adjustment for microscopes. (Complete.) ~
17th May, 1900. Henry William Hamblin Palmer. Improvements in apparatus for photographing and exhibiting cinematograph and matoscope pictures.
17th May, 1900. Carl Johann David Opperman and Otto Rudolph Opperman. Improvements in cinematographs.
17th May, 1900. Oskar Messter. Improvements in or connected with apparatus or mechanism for the exhibition of animated photographe or pictures. (Complete.)
19th May, 1900. Victor Herbert Gregory and Leolin Charles Gregory. Improvements in apparatus for viewing panoramic or changing views and giving the stereoscopic effect or rotundity.
26th May, 1900. Hubert Schmidt and Wilhelm Haensch. Improvements in or relating to kinematographs and like photographic serial apparatus.
29th May, 1900. Henry Milbourne Selfe.’ Astigometer. An optical instrument for testing astigmatism.
30th May, 1900. Edwin Tranter Butler. Improvements in photographic cameras for pro-| ducing and viewing images in natural colours. (Complete.)
31st May, 1900. Robert Krayn. Improvements in the means for and methods of projecting or viewing photographic pictures with natural colours. (Complete.)
31st May, 1900. Robert Krayn. Improvements in the method of and means for the production of photographic pictures, which may be viewed with the natural colours of their subjects. (Complete.)
31st May, 1900.. Thomas Armat. Improvements in apparatus for projecting animated pictures. (Complete.)
1st June, 1900. Eberhard Schneider. Shutter for kinetoscopes. (Convention date 15th December, 1899.)
8906.
* 8933. Improvements
8973. Improvements
8991. 8992.
9112,
9122.
9141,
9251.
9739,
9866.
9936.
10000.
10003.
10050.
10120.
10412. 7th June, 1900. William Folder Hurndall. An improvement for moving the film on a
lifeograph or animated picture machine.
Copies of the following specifications may be obtained by remitting I1/for each specification to W. P. Thompson & Co., Patent Agents, 322, High Holborn, London, W.C.
SPEcIFICATIONS PUBLISHED. 14672 of 1899. Abbe. Devices for observing or reproducing the images projected by optical lens systems. . 6235 of 1900. Stone. Panoramic cameras. 11556 of 1899, Schmidt. Prisms for optical purposes. 19474 of 1899. Foersterling. Production of photographs. 12086 of 1899. Schoeller. Animated picture machines and the like. : 17514 of 1899. Szezepanik. Optical projection apparatus. 15967 of 1899. Kamm. Electric arc projecting lanterns.
0:
ANOS esos,
j Bates and Queries. 9 CARD?
E. H. Stevenson.—Your interesting communication will appear in our next issue, and copies of Journal will be forwarded to the parties enumerated.
W. J. M’Culloch.—Your letter was handed to Messrs. Watson & Son, of 313, High Holborn, W.C., who will write to you upon the subject.
Dan Osborne.—You can obtain an opaque screen from any lantern dealer. It can be rolled up, and for the purpose of projecting cinematographs will be vastly superior to the thin translucent material which you are using. It is not a difficult, matter to make an opaque yet folding screen. We publish the details in a paragraph under * Notes "’ in this issue.
R. G.—The address of Windsor & Newton is 37, Rathbone Place, London, W. .
D. Yates asks the reason for a small screw being inserted at the inlet of a gauge for ascertaining the contents of a gas cylinder. Ans.—The screw is for the purpose of making the inlet into the Bourdon gauge so small that there will be no chance of concussion should the gas from cylinder be suddenly turned on, thus preventing all chance of bursting.
Th. Seymour.—We really cannot make out what you want to know; kindly write again and leave more space between each line as the present letter is eomewhat of a puzzle.
J. G. asks if we can supply any particulars as to size, etc., of such screens as are used for lantern performance at such a building as the Albert Hall. Ans.—When~ Mr. C. W. Locke exhibited there on the occasion of Mr. Nansen's visit he used 623 yards of 92 inch material, strengthened at the edges with webbing. About 450 feet of rope were used to erect it, also about 300 feet of strong cord. Two poles 22 feet long were employed at sides of gallery railings, to which to attach the rope for supporting the weight of screen. The above particulars were supplied by Mr. Locke himself.
Shutter.—The patent has expired. :
R. Turner.—We note your complaint that the person mentioned bas not replied to your letter, but you will quite understand it when we tell you that the gentleman died many months ago, notification of which appeared in our columns at the time.