Patent US4813934A successfully refreshed from Google Patents.
US3741631A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiation incidence control means
Assignee: Individual
•
Filing: 1971-03-11
•
Granted: 1973-06-26
•
Expires: 1991-03-11
Abstract
Abstract The described invention makes use of at least two screens which have complementary transparent and opaque patterns and which are relatively movable towards and away from each other so that when adjacent they obturate radiation and when separated they pass it. Thus radiation, for example upon a plant-cultivation area or into a green house, is controllable. Selective filtration may be used to control selected parts of the spectrum. The operation is preferably by inflating and deflating spaces between the screens at least one of which is pliable.
Inventors
- 👤 N Laing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:17
CPC Classifications
A; A01; A01G; A01G13/00; A01G13/20; A01G13/21; A01G9/00; A01G9/14; A01G9/1407; A01G9/1415; E; E06; E06B; E06B9/00; E06B9/24; E06B2009/2405; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/25
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
96 words
Radiation incidence control means comprising first and second screens each extending over a predetermined area upon which incidence of radiation is to be controlled, each said screen having transparent and opaque patterns with the opaque pattern of one screen overlying the transparent pattern of the other screen when said screens are in abutting relationship throughout, said screens being inter-attached to form a plurality of pockets therebetween with the screens in the area of each pocket being complementary transparent and opaque, and means for inflating said pockets to separate the portions of the screens forming said pockets.
Claim 2
Dependent Claim
96 words
Radiation incidence control means comprising first and second screens each extending over a predetermined area upon which incidence of radiation is to be controlled, each said screen having transparent and opaque patterns with the opaque pattern of one screen overlying the transparent pattern of the other screen when said screens are in abutting relationship throughout, said screens being inter-attached to form a plurality of pockets therebetween with the screens in the area of each pocket being complementary transparent and opaque, and means for inflating said pockets to separate the portions of the screens forming said pockets.
Claim 3
Dependent Claim
136 words
Radiation incidence control means for controlling incidence of radiation onto a predetermined area, comprising a first screen extending over said area, a second screen which is flexible underlying said first screen and extending over said area, each said first and second screens having transparent and opaque patterns with the opaque pattern of one screen underlying the transparent pattern of the other screen when said screens are in abutting relationship, and controllable means to move portions of said screens forming a pocket therebetween relatively towards and away from each other by controllably inflating and deflating said pocket whereby when said portions are moved relatively towards each other, the incidence of radIation on said area is reduced and whereby when the portions are moved relatively away from each other, the incidence of radiation on said area is increased.
Claim 4
Dependent Claim
136 words
Radiation incidence control means for controlling incidence of radiation onto a predetermined area, comprising a first screen extending over said area, a second screen which is flexible underlying said first screen and extending over said area, each said first and second screens having transparent and opaque patterns with the opaque pattern of one screen underlying the transparent pattern of the other screen when said screens are in abutting relationship, and controllable means to move portions of said screens forming a pocket therebetween relatively towards and away from each other by controllably inflating and deflating said pocket whereby when said portions are moved relatively towards each other, the incidence of radIation on said area is reduced and whereby when the portions are moved relatively away from each other, the incidence of radiation on said area is increased.
Claim 5
Dependent Claim
13 words
Radiation incidence control means according to claim 2 wherein said screens are non-porous.
Claim 6
Dependent Claim
35 words
Radiation incidence control means according to claim 3 wherein said screens form a modular unit and have in addition connection means at one end whereby said unit may be joined to other similar modular units.
Claim 7
Dependent Claim
79 words
Radiation incidence control means according to claim 2 wherein said first screen is immobile and having in addition a third screen which is immobile and transparent underlying said second screen and extending over said predetermined area with said third screen being attached to said second screen to form a pocket therebetween, and means for deflating and inflating the pocket between said third and second screens whereby said second screen may be moved towards and away from said first screen.
References Cited (Backward Citations)
US2415226A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |