US4539768A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Digital display apparatus
Assignee: Individual
•
Filing: 1984-06-15
•
Granted: 1985-09-10
•
Expires: 2004-06-15
Abstract
Abstract The digital display apparatus comprises a board having one or more seven-element digital-type displays marked thereon. A flap is provided for each of the elements and is pivotable from a first position in which the associated element is exposed, to a second position in which it covers its associated element. Selective pivoting of the flaps enables each display to form any required digit.
Inventors
- 👤 John J. Halliday
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:14
CPC Classifications
G; G09; G09F; G09F7/00; G09F7/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
136 words
A digital display apparatus comprising a board having one or more seven-element displays marked thereon, a flap for selectively covering and uncovering each element of the display, and pivot means connecting said flaps to said board, said flaps being manually pivotal from a first position in which the associated element is exposed, to a second position in which it covers the associated element, said pivot means comprising spaced apertured stud members positioned in a slot adjacent the edge of the flap and spring means, said stud members being mounted in spaced apertures in said board with each flap and said spring means resiliently retaining each of said flaps in said first or second position, whereby selective pivoting movement of the individual flaps enables the elements to form and display any required digit from 0 to 9.
Claim 2
Dependent Claim
136 words
A digital display apparatus comprising a board having one or more seven-element displays marked thereon, a flap for selectively covering and uncovering each element of the display, and pivot means connecting said flaps to said board, said flaps being manually pivotal from a first position in which the associated element is exposed, to a second position in which it covers the associated element, said pivot means comprising spaced apertured stud members positioned in a slot adjacent the edge of the flap and spring means, said stud members being mounted in spaced apertures in said board with each flap and said spring means resiliently retaining each of said flaps in said first or second position, whereby selective pivoting movement of the individual flaps enables the elements to form and display any required digit from 0 to 9.
Claim 3
Dependent Claim
22 words
A digital display apparatus as set forth in claim 1, wherein said resilient means comprises an axially resilient means encircling said stud.
Claim 4
Dependent Claim
19 words
A digital display apparatus as set forth in claim 1, wherein said resilient means comprises a resilient tubular-shaped member.
Claim 5
Dependent Claim
25 words
A digital display apparatus as set forth in claim 1, wherein said board is dark colored and each of said seven-element displays is light colored.
Claim 6
Dependent Claim
28 words
A digital display apparatus as set forth in claim 4, wherein said seven-element displays are translucent and electric lamps are provided adjacent the rear surface of said board.
Claim 7
Dependent Claim
25 words
A digital display apparatus as set forth in claim 1 wherein said spring means comprises a coil spring encircling the outer surface of said stud.
Claim 8
Dependent Claim
24 words
A digital display apparatus as set forth in claim 1, wherein said spring means comprises a resilient tubular-shaped member made of a plastic material.
Claim 9
Dependent Claim
27 words
A digital display apparatus as set forth in claim 1, wherein said flaps have cam means thereon which are mounted in an aperture in said stud members.
References Cited (Backward Citations)
US567379A
Cited
US1357457A
Cited
GB1137299A
Cited
US4063377A
Cited
GB1595532A
Cited
GB2015799A
Cited
EP0012803A1
Cited
GB2045991A
Cited
EP0041074A1
Cited
DK25082A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-09 | 1989-03-11 | 1989-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-09 | 1993-03-11 | 1993-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-09 | 1997-03-11 | 1997-09-10 | $7700.00 | Window Closed / Lapsed |