US652204A - Gas photographing apparatus. - Google Patents

Description

No. 652,204.- Patented lune l9, I900:

' A. G. ADAMSUN.

GAS PHUTOGRAPHING APPARATUS.

(Application filed Feb. 27, 19001) (No Model.)

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ments in Reflectors for Photographing UNITED STATES ATENT Erica GAS PHOTOGRAPHING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 652,204, dated June 19, 1900. Application filed February 27, 1900. Serial No. 6,749. (No model.)

1b @135 toil/0172, it may concern:

Be it known that LANDREW GEORGE ADAM- SON, electrical engineer, of Dashwood House, 9 New Broad street, London, England, have invented certain new and useful Improvey Means of Gas, of which the following is a specification.

In order that my invention may be fully understood, I will proceedto describe it with reference to the accompanying drawings, in which- Figure 1 is a front elevation of a reflector suspended from a beam. Fig. 2 is a detail section showing the construction of the reflector.

The chamber or reflector I propose to use may be of any convenient shape, butis composed of various alternate layers of a suitable cloth material and paper drawn to the required shape over a mold of metal, cement, or other suitable materialand retained in position until thoroughlydry. I show my reflectorsuspended from a beam similar to that represented in my copending application, Serial No. 4,748, of same date, for Letters Patent for improvements in apparatus for photographing by means of gas. I make the reflector in the following manner: The mold being made of any suitable material and shape, its external or convex surface is prepared to receive the first layer of cloth or canvas by placing around the periphery a wooden ring shaped on its upper edge. The cloth having been immersed in any suitable fluid to render it fireproof is laid across the mold and stretched in all directions until all creases or folds are removed and held in place in any suitable manner. Then while still wet paper in sheets is pasted or otherwise fixed over its entire surface (this paper having been previously expanded by damping.) Another sheet of cloth is similarly treated and stretched over the layer of paper, the paper having been coated on its outer surface with paste or other adhesive substance to receive the cloth. Then the second cloth is covered with paper, as before, then cloth, as before, until the desired thickness of material is produced, when either heat is applied or the mass is left to dry spontaneously. When dry, all the material is cut neatly around by the under edge of the wood ring, except the outer layer of cloth. This is retained until the reflector is taken off the mold. It is then drawn inside and secured in any suitable way to the inside of the wood ring, thus securing the whole of the material to the ring, which supports it at its outer edge.

V is the wooden supporting-ring on the inner rim of the reflector, while 1, 2, 3, 4, and 5 are respectively alternate layers of cloth and paper. It will be observed that the layer of cloth 5, which is the outside one, envelops the whole and is brought around the wooden ring V to'the inside thereof and secured by any convenient method, such as gluing or pasting, &c. The cloth and paper are re spectively chosen with a view to their re spective properties of expansion and contraction when wet and when dry.

Having thus described my invention, the following iswhat I claim as new therein and desire to secure by Letters Patent:

A reflector comprising alternate layers of fireproof cloth and paper, and a ring; the edge of the outer layer extending around the ring and secured to the inside thereof.

In testimony whereof I have affixed my signature in presence of two witnesses.

ANDREXV GEORGE ADAMSON.

Witnesses:

J OHN LIDDLE, EDITH MARY EDMONDSTONE.

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