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Publication numberUS291146 A
Publication typeGrant
Publication dateJan 1, 1884
Filing dateApr 25, 1883
Publication numberUS 291146 A, US 291146A, US-A-291146, US291146 A, US291146A
InventorsWilliam Calves
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
William calves
US 291146 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(Nonoael.) Y



No. 291,146. K Patented Jan. 1.1884.




SP .CIFICA'IION forming part of Letters Patent No. 291,146, dated January 1, 1854.

Y Application filed Apxill, i883. (No model.)

To ctZZ whom, it may concern..-

Be it known that I, WILLTAM CALvnR, a citizen of the United States, residing at Washington, District of Columbia, have invented certain new and useful Improvements in Solar Reiectors, of 'which the following is a specification, reference being had therein to the accompanying drawings, in which- Figure l represents a reflector constructed in accordance with my invention; Fig. 2 is a vertical section on theline w of Fig. l. Fig. 3 illustrates the application. of my invention to a solar condenser, and Fig. 4 is a modication.

Like letters refer to like parts in all the figures.

In the art of utilizing the heat-rays of' the sun, in accordance with the method and means for which a patent was granted me July 4, 1882, exceedingly high degrees of heat are produced, and I have found that even` metal reflecting-surfaces are liable to become injured so that they are entirelyV unfitted for the performance of their function as reflectors.

The object of this invention is, primarily, to devise a reflector which is capable of withstanding excessive heat with out affecting its power as a reflector; and with this object in view Ihave devised means whereby the reiiector may be constantly enveloped by or in water, or any otherliquid or gaseous refrigerative substance, either at rest or in motion.

I do not herein claim, broadly, the application to a reflecting-surface of a refrigerant, as that feature of this invention formsthe subjectmatter of a separate application (No. 92,864) filed herewith. In this case 'I employ a double jacket provided with means for maintaining a body of water or other suitable substance about and in contact with a reflector, and in a state of rest. or as a current, according to requirement or desire, by which means the reiiector is prevented from absorbing sufficient heat to injure the reflecting-surface thereof.

Referring to the drawings, A represents the reflector, and a its reflecting surface The material of the reflector may be anything suited to its pnrposeyas also may the material of its accessories herein shown. y

B represents the frame or case in which the reflector is secured, eitherby resting in grooves b, formed in the walls thereof, or in any other suitable manner. The case B is formed so as to hold water or other liquid or gas, and is provided with a transparent face, C, and an opaque back, B, and an inlet, D, is arranged at one side of the reflector, an outlet, E, at the opposite side, and apertures or passages F through the substance of the reflector, so that 'the water or other refrigerat-ive substance may be received into the case and pass about and envelop the reflector. Suitable controllingvalves, d e, are provided to regulate the supply and current, or retain a body of the water, gas, or air employed as a refrigerant, and trunnions b b are provided to adapt the re- Hector to be tilted or adjusted in or upon any suitable frame-work or support. For this latter purpose vertical pivots or trunnions may be located at the top and4 bottoni of the reflector. The reflector may be plane, or concave, or convex, or of any other desired conformation in cross-section, and its case may or may not conform thereto as desired.

The operation is apparent. The rays of the sun, falling on the reflector, pass through the body or current of refrigerative substance, and are directed or returned by the reecting-surface a to any desired locality, and the heat thereof, which would tend to injure the reflector, is absorbed by the refrigerant or reflected back, in part at least, so that an actual saving of heat is accomplished, especially when air is used in front and water at the back of the reflector.

The condenser illustrated in Fig. 3 forms the subject-matter of a separate application (No. 92,863) filed herewith; but, so far as the protection of its reflecting-surface is concerned, its operation is exactly like that of the plane reflector shown in Figs. I and 2. The dotted lines indicate the direction and course or path of the solar rays.

I am aware that lenses have been constructed so as to receive and retain liquids, and I do not claim such as of my invention.

It is apparent that a separate inlet and outlet may be provided for each side of the reiiector, as shownA in dotted lines, Fig. 2, to supply, retain, and deliver liquid, or one or more refrigerative substances, independently, on each side of the reflect-or, in which case the passages F would be omitted. Such a construction I deem the equivalent of that shown, so far as the protection of both the face and p IOO Vrefrig'crative substance against a reflector, as

back of the reflector is concerned. Furthermore, the front, or chamber, or jacket formed by the face C and the reflector A and ease B may be omitted, as shown in Fig. et, in which construction the inlet D would be located to deliver the refrigerant back of the reflector, which would therefore be water-jacketed or protected at the back only, and for many purposes such single water-jacket would be sufficient protection. I therefore do not limit myselfto a double jacket or case.

I do not herein claim means for directing` a that is embraced in a companion application (Serial No. 92,864) pending herewith.

Having described my invention and its operation, what I claim as new is- 1. A solar reflector provided with means,

substantially as specified, for maintaining a confined current of refrigerative substance in contact therewith, substantiallyv as and for the purpose set forth.

2. rl`he combination of a reflector having` apertures therein with a water and air tight inclosing-case having` a transparent face and an inlet and outlet, substantially as specified.

3. rl`he combination ofthe reflector A, frame` B, transparent face C, inlet D d, and outlet E c, substantiall \r as shown and described.

et. rIhe combination of the frame B, grooved as at I), and provided with trunnions b, and inlet D and outlet E, with the reflector A, provided with apertures F, substantially as shown and described.

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

\V1LLIA\I CALVEP.. 'itnesses:

E. 13. S'roclilxc. )L i. CALLAN.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2680437 *Dec 3, 1945Jun 8, 1954Univ Board Of RegentsSolar heat trap
US2680565 *Dec 3, 1945Jun 8, 1954Univ ColoradoSolar heating apparatus and method
US2945958 *Oct 25, 1956Jul 19, 1960Du PontLight collector
US3958553 *Oct 29, 1974May 25, 1976The United States Of America As Represented By The Administrator Of The National Aeronautics And Space AdministrationSolar energy trap
US4252108 *Jan 29, 1979Feb 24, 1981Drow John PSolar heating device