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Publication numberUS509379 A
Publication typeGrant
Publication dateNov 28, 1893
Filing dateJan 26, 1893
Publication numberUS 509379 A, US 509379A, US-A-509379, US509379 A, US509379A
InventorsArnold A. Ingram
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Fluid lens
US 509379 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

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No' 5091379 Patented Nov. Z8, 1893.




SPECIFICATION forming part of Letters Patent No. 509,379, dated November 28, 1893.

Application filed January 26,1893. Serial No. 459.818. (No model.)

To all whom, may concern,.-

Be it known that I, ARNOLD A. INGEAM, a citizen of the United States, residing at Wooster, in the county of Wayne and State of Ohio, have invented certain new and useful Iruprovernents in Fluid Lenses; and Ido hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters of reference marked thereon, in which- Figure l, is a side view showing allot the different parts properly located. Fig. 2, is a dctached view of one of the lens sections. Fig. 3, is an edge view showing the location of the lens sections, also illustrating the position of their retaining band, showing the said retaining band broken for the purpose of better illustrating the different parts. Fig. 4 is a view showing a diametrical section of the band, designed to hold the lens and illustrating a section of the lens and its flanges. Fig. 5, is a View showing portions of the lens, and a sectional view of the Wire-retaining screws, said parts being shown somewhat out of proportion for the purpose of better illustrating the location of the different parts.

The present invention has relation to luid lenses, and it consists in the diierent parts and combination of parts hereinafter described.

Similar letters of reference indicate corresponding parts in all the figures of the draw- 1ngs.

In the accompanying drawings A represents the lens sections which are formed in pairs and of glass, and are substantially of the form shownitle drawings, and as shown, their meeting faces are circular, the sections proper being convexo concave. The meeting faces of the lens A, terminate in the flanges @,which flanges are provided with plain smooth surfaces, and are so formed for the purpose of bringing the meeting faces of the flanges into close and true contact with each other.

For the purpose of hermetieally sealing the lens sections A, cement may be used to unite the llanges a, together, which securely unites the lens sections A.

For the purpose of assisting in holding the lens sections in proper position, and at the Same. Ytime. protetiugand guarding the peripheries of the sections A, and their tlanges a, the metallic band B is provided, which metallic band is formed ot sufficient size and strength to hold the sections together. It will be understood that the size of the band B, will correspond with the size of the lens sections A.

For the purpose of assistingin holding the flanges a, of the lenses A, the L-shaped disks orbands b are provided,which L-shaped bands are located against the inner periphery of the band B, and the outer faces of the flanges a, except that a pliable or yielding disk may be placed between the flanges b, and the flanges a, thereby to a certain extent protecting the glass.

For the purpose of relieving the-lenses A, from the pressure broughtJ to bear;J algainst thembytheliquid met wthint e enses, the wires Dymmwdled, which wires cross the lenses diametrically as indicated in Fig. 1.

For the purpose of adjusting the tension of the wires D, the screws E, are provided, which screws are seated in the metallic band B, substantially as illustrated in Fig. 5.

For the purpose of filling the lenses, the notches or recesses c are formed in the ilanges a, and are so located that when a pair of lenses are properly placed together, said notches will come directly opposite each other, thereby providing a filling aperture.

Fox-the purpose of removing the liquid from a lens, two apertures should be formed, one being designed for an outlet, and the other atmospheric.

It will be understood that by my peculiar manner of forming the lens the sections composing the lens can be pressed or formed by means of dies, and of any desired diameter, thereby forming a true lens, which can be formed much larger in diameter than under the old way of forming the lens of solid glass, inasmuch as by the means of dies, the sections can be pressed to uniform thickness throughout and with true surfaces.

It will be understood that the lens proper is to be filled with transparent liquid, which may be alcohol or it may consist of a composition of dilerent ingredients. E, are formed hollow as illustrated in Fig. 5, and the wires D, passed through said screws, thereby forming a means for bringing said screws t0 or from a common center.

The screws IOC For the purpose of preventing the wires D, from slipping through the opening'through screw E, a knot or its equivalent such as d, may be formed upon the ends of the wires D. It will also be understood that the wires D, should be fine, reference being had to the strength of the wire.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a fluid lens, the sections A formed convexo concave in radial cross section provided with the anges a, having smooth fiat surfaces, with the smooth fiat surfaces hermetically sealed together, the metallic band B, located upon the peripheries of the anges a., the L-shaped bands b, located upon the inner peripheries of the band B,and upon op] sides of the flanges A, substantially a:

for the purpose described.

ARNOLD A. INGRA Witnesses:


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2484675 *Oct 3, 1947Oct 11, 1949Carl BidermanFluid lens having bubble elimination means
US2490873 *Apr 6, 1946Dec 13, 1949John A JohnsonFluid lens construction
US2496681 *Feb 14, 1947Feb 7, 1950Stephens Robert DHollow circular segmental lens structure with liquid filler
US2794368 *Aug 9, 1955Jun 4, 1957Victor KosaFluid condensing lens for picture windows
US3161718 *Jul 12, 1961Dec 15, 1964United Res & Dev CorpVariable power fluid lens
US4902102 *Mar 28, 1988Feb 20, 1990Litton Systems, Inc.Aspheric optical test plate assembly
US5956183 *May 26, 1998Sep 21, 1999Epstein; SaulField-customizable variable focal length lens
Cooperative ClassificationG02B3/14