US3583466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable screen frame for rear projection screen or the like
Assignee: Polacoat Inc
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Filing: 1969-12-17
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Granted: 1971-06-08
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Expires: 1989-12-17
Abstract
Abstract An adjustable screen frame assembly composed essentially of tubular members which are rectangular in cross section, the tubular members defining the corners legs, and side parts of the screen frame, the frame assembly including T-shaped sections which are telescopically received in the tubular parts and wedged into multiple point clamping engagement therewith by means of adjustment bolts, the frame forming parts being provided with means for readily attaching a screen or the like thereto.
Inventors
- 👤 John F Dreyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:58
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/58
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
169 words
In an adjustable screen frame assembly; a pair of leg parts each having a tubular post which is rectangular in cross section; a set of four corner parts each composed of an interconnected pair of tubular sockets extending at right angles to each other, said sockets being rectangular in cross section; a set of frame members of a size to be telescopically received in the sockets of said corner parts, said corner parts and said frame members, when assembled, defining parts of a rectangular screen supporting frame; a pair of T-shaped sections of a size to be telescopically received in the tubular posts of said leg parts and in the tubular sockets of said corner parts; and clamping means operatively connected to said posts for securing the ends of said T-shaped sections therein, and additional clamping means operatively connected to said sockets for engaging the portions of the T-shaped sections extending therethrough, whereby the rectangular screen frame so formed may be raised and lowered relative to said leg parts.
Claim 2
Dependent Claim
169 words
In an adjustable screen frame assembly; a pair of leg parts each having a tubular post which is rectangular in cross section; a set of four corner parts each composed of an interconnected pair of tubular sockets extending at right angles to each other, said sockets being rectangular in cross section; a set of frame members of a size to be telescopically received in the sockets of said corner parts, said corner parts and said frame members, when assembled, defining parts of a rectangular screen supporting frame; a pair of T-shaped sections of a size to be telescopically received in the tubular posts of said leg parts and in the tubular sockets of said corner parts; and clamping means operatively connected to said posts for securing the ends of said T-shaped sections therein, and additional clamping means operatively connected to said sockets for engaging the portions of the T-shaped sections extending therethrough, whereby the rectangular screen frame so formed may be raised and lowered relative to said leg parts.
Claim 3
Dependent Claim
25 words
The adjustable screen frame assembly claimed in claim 1 wherein said frame members and said corner posts include means for detachably connecting a screen thereto.
Claim 4
Dependent Claim
27 words
The adjustable screen frame assembly claimed in claim 2 in combination with a screen having spaced apart hooks along its edges engageable with said screen mounting means.
Claim 5
Dependent Claim
25 words
The adjustable screen frame assembly claimed in claim 3 wherein said screen mounting means comprises spaced apart openings positioned to be engaged by said hooks.
Claim 6
Dependent Claim
21 words
The adjustable screen frame assembly claimed in claim 3 wherein said screen mounting means comprises flange members engageable by said hooks.
Claim 7
Dependent Claim
18 words
The adjustable screen frame assembly claimed in claim 1 wherein said frame members are tubular in cross section.
Claim 8
Dependent Claim
79 words
The adjustable screen frame assembly claimed in claim 6 wherein at least an opposing pair of the sides of said screen frame are each composed of a plurality of tubular frame members, and wherein said last named tubular frame members, and wherein said last named tubular frame members are connected together by T-shaped sections telescopically received in the adjoining ends of the said tubular frame members, including clamping means for fixedly securing said T-shaped section to said tubular members.
Claim 9
Dependent Claim
16 words
The adjustable screen frame assembly claimed in claim 1 wherein said frame members comprise T-shaped sections.
Claim 10
Dependent Claim
67 words
The adjustable screen frame assembly claimed in claim 1 wherein at least an opposing pair of the sides of said screen frame are each composed of a plurality of T-shaped sections, wherein said last named frame members are connected together by tubular sleeves in which the adjoining ends of the members are telescopically received, including clamping means for fixedly securing said tubular sleeves to said T-shaped sections.
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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |