Patent US3841740A successfully refreshed from Google Patents.
US3841740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Changeable fluid filter eyeglasses
Assignee: Mount Lacey Enterprises Inc
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Filing: 1971-12-14
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Granted: 1974-10-15
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Expires: 1991-12-14
Abstract
Abstract A device that adjusts the type and degree of shielding of the eyes from electromagnetic ray energy from the sun by presenting different degrees of screening and filtering of the ray energy, the device having a window-type shield that is formed from spaced layers of transparent material that are edge sealed to provide a thin light transmission cavity therebetween and a connecting storage container with valve means at the connection between the cavity and the container. The device holds two immiscible liquids of substantially equal volume that have different specific gravities so as to maintain separate liquid bodies within the device. By opening the valve means communication is established between the container and the cavity and tilting the device exchanges the liquids by gravity, at which time closing of the valve means maintains the exchanged liquid in the cavity to produce the desired change in shielding effect.
Inventors
- 👤 M Lacy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:50
CPC Classifications
A; A61; A61F; A61F9/00; A61F9/04; A61F9/06; A61F9/065; A61F9/067; E; E06; E06B; E06B3/00; E06B3/66; E06B3/67; E06B3/6715; E06B3/6722; G; G02; G02B; G02B5/00; G02B5/20; G02B5/22; G02B5/23; G02B5/24; G02C; G02C7/00; G02C7/10; G02C7/105; E06B9/00; E06B9/24; E06B2009/2411
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
154 words
Light energy absorbing and filtering eyeglasses comprising stem pieces, two lenses each of which is formed from two spaced transparent plates defining a closed thin cavity therebetween and a frame to the ends of which are attached the stem pieces, said frame defining two lens openings containing said lenses and at least two liquid storage compartments, one for each lens, communicating with said cavity, said cavity and compartment containing only two bodies of immiscible liquids hermetically sealed in the frame and lens, each body of liquid having a different specific gravity and ray absorptive and filtering properties and valve means for selectively communicating each cavity with one of said compartments whereby when the valve means is open and the device is tilted, gravity movement of the heavier liquid produces an exchange of liquids between the cavity and the compartment, and when the valve means is closed, the changed liquid is sealed in the cavity.
Claim 2
Dependent Claim
154 words
Light energy absorbing and filtering eyeglasses comprising stem pieces, two lenses each of which is formed from two spaced transparent plates defining a closed thin cavity therebetween and a frame to the ends of which are attached the stem pieces, said frame defining two lens openings containing said lenses and at least two liquid storage compartments, one for each lens, communicating with said cavity, said cavity and compartment containing only two bodies of immiscible liquids hermetically sealed in the frame and lens, each body of liquid having a different specific gravity and ray absorptive and filtering properties and valve means for selectively communicating each cavity with one of said compartments whereby when the valve means is open and the device is tilted, gravity movement of the heavier liquid produces an exchange of liquids between the cavity and the compartment, and when the valve means is closed, the changed liquid is sealed in the cavity.
Claim 3
Dependent Claim
28 words
The eyeglasses of claim 1 in which each compartment within the frame has a larger capacity than the capacity of the cavity with which it is in communication.
Claim 4
Dependent Claim
21 words
The eyeglasses of claim 1 in which each of said compartments is located in the lens defining portion of the frame.
Claim 5
Dependent Claim
56 words
The eyeglasses of claim 1 in which the frame defines a bridge between the two lens openings in which the valve means is positioned, said valve means being rotatable about an axis and defining a separate opening communicating each said compartment with one of said cavities, said openings being angularly disposed with respect to said axis.
Claim 6
Dependent Claim
12 words
The eyeglasses of claim 1 in which the spaced plates are plastic.
Claim 7
Dependent Claim
12 words
The eyeglasses of claim 1 in which the spaced plates are glass.
Claim 8
Dependent Claim
16 words
The eyeglasses of claim 1 in which said immiscible liquids are oils of different specific gravities.
Claim 9
Dependent Claim
14 words
The eyeglasses of claim 1 in which said immiscible liquids are of different colors.
Claim 10
Dependent Claim
21 words
The eyeglasses of claim 8 in which one oil is a light mineral oil and the other is a heavy glycol.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |