US4803564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic blackboard system
Assignee: Mitsubishi Electric Corp
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Filing: 1987-09-03
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Granted: 1989-02-07
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Expires: 2007-09-03
Abstract
Abstract An electronic blackboard system is composed of: angle irons fixed to an information writing board or to a wall surface above the information writing board; a guide rail which is secured to the angle irons and extends horizontally; a driving unit placed on the guide rail, the driving unit moving horizontally; a photoelectric conversion device for converting written information into electrical signals; a memory for storing image information of one picture; a hard-copy device for recording the image information; and a roller secured to the photoelectric conversion device, the roller rolling while in contact with the information writing board. In the thus constructed electronic blackboard system, it is possible to read information written on an existing information writing board which may even be attached to a wall.
Inventors
- 👤 Katsuyoshi Sakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:54
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/04; H04N1/10; H04N1/1013; H04N1/1017; H04N1/19; H04N1/191; H04N1/192; H04N1/193; H04N2201/00; H04N2201/04; H04N2201/0402; H04N2201/0438
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
222 words
An electronic blackboard system comprising: an attachment means fixed to the upper portions of an information writing board such as a white board or a blackboard attached to a wall surface or fixed to a wall surface above such an information writing board; said attachment means comprising a pair of spacedly disposed angle members each respectively located adjacent an upper corner of the information writing board; means securing the angle members to the information writing board in such spaced apart relationship; a guide rail secured by said attachment means and horizontally disposed along an upper edge of said information writing board; means securing the guide rail at ends thereof to respective angle members; a driving unit placed on said rail an moving thereon in the horizontal direction; a photoelectric conversion device, connected to said driving unit in such a manner as to face the surface of said information writing board, for reading written information; a memory for storing pieces of image information of a whole picture obtained by moving said photoelectric device in the direction intersecting the read-out line; a hard-copy device for reading out said image information stored in said memory and recording said image information; and a roller secured to the lower end of said photoelectric conversion device, said roller rolling while being in contact with said information writing board.
Claim 2
Dependent Claim
222 words
An electronic blackboard system comprising: an attachment means fixed to the upper portions of an information writing board such as a white board or a blackboard attached to a wall surface or fixed to a wall surface above such an information writing board; said attachment means comprising a pair of spacedly disposed angle members each respectively located adjacent an upper corner of the information writing board; means securing the angle members to the information writing board in such spaced apart relationship; a guide rail secured by said attachment means and horizontally disposed along an upper edge of said information writing board; means securing the guide rail at ends thereof to respective angle members; a driving unit placed on said rail an moving thereon in the horizontal direction; a photoelectric conversion device, connected to said driving unit in such a manner as to face the surface of said information writing board, for reading written information; a memory for storing pieces of image information of a whole picture obtained by moving said photoelectric device in the direction intersecting the read-out line; a hard-copy device for reading out said image information stored in said memory and recording said image information; and a roller secured to the lower end of said photoelectric conversion device, said roller rolling while being in contact with said information writing board.
Claim 3
Dependent Claim
37 words
An electronic blackboard system according to claim 1 wherein each angle member has a first leg for attachment to the top surface of the information writing board and a second leg for securing the guide rail thereto.
Claim 4
Dependent Claim
22 words
An electronic blackboard system according to claim 2 wherein said first leg is substantially horizontal and said second leg is substantially vertical.
Claim 5
Dependent Claim
24 words
An electronic blackboard system according to claim 1 wherein said driving unit includes at least two rollers, and said guide rail is sandwiched therebetween.
Claim 6
Dependent Claim
17 words
An electronic blackboard system according to claim 4 further comprising a motor adapted to drive said rollers.
Claim 7
Dependent Claim
47 words
An electronic blackboard system according to claim 1 including means for supporting said photoelectric conversion device in a downwardly depending direction from the driving unit, said means for supporting comprising pivot means for enabling the limited rotation of the photoelectric conversion device relative to said driving unit.
Claim 8
Dependent Claim
43 words
An electronic blackboard system according to claim 6 wherein said driving unit has roller means at a top end thereof for engagement with said guide rail, said pivot means disposed at a bottom end of the driving unit and below said roller means.
Claim 9
Dependent Claim
33 words
An electronic blackboard system according to claim 7 wherein said roller means includes at least one driven roller engaging said guide rail and at least one idler roller disposed within said guide rail.
Claim 10
Dependent Claim
20 words
An electronic blackboard means according to claim 8 including a pair of idler rollers mounted in orthogonally directed relative positions.
Claim 11
Dependent Claim
213 words
An electronic blackboard system comprising: an attachment member fixed to the upper portions of an information writing board such as a white board or a blackboard attached to a wall surface or fixed to a wall surface above such an information writing board; a guide rail secured by said attachment member and horizontally disposed along an upper edge of said information writing board; a driving unit placed on said rail and moving thereon in the horizontal direction; a photoelectric conversion device, connected to said driving unit in such a manner as to face the surface of said information writing board, for reading written information; means for supporting said photoelectric conversion device in a downwardly depending direction from a bottom end of said driving unit, said means for supporting comprising pivot means for enabling limited rotation of the photoelectric conversion device relative to said driving unit; a memory for storing pieces of image information of a whole picture obtained by moving said photoelectric device in the direction intersecting the read-out line; a hard-copy device for reading out said image information stored in said memory and recording said image information; and a roller secured to the lower end of said photoelectric conversion device, said roller rolling while being in contact with said information writing board.
Claim 12
Dependent Claim
213 words
An electronic blackboard system comprising: an attachment member fixed to the upper portions of an information writing board such as a white board or a blackboard attached to a wall surface or fixed to a wall surface above such an information writing board; a guide rail secured by said attachment member and horizontally disposed along an upper edge of said information writing board; a driving unit placed on said rail and moving thereon in the horizontal direction; a photoelectric conversion device, connected to said driving unit in such a manner as to face the surface of said information writing board, for reading written information; means for supporting said photoelectric conversion device in a downwardly depending direction from a bottom end of said driving unit, said means for supporting comprising pivot means for enabling limited rotation of the photoelectric conversion device relative to said driving unit; a memory for storing pieces of image information of a whole picture obtained by moving said photoelectric device in the direction intersecting the read-out line; a hard-copy device for reading out said image information stored in said memory and recording said image information; and a roller secured to the lower end of said photoelectric conversion device, said roller rolling while being in contact with said information writing board.
Claim 13
Dependent Claim
36 words
An electronic blackboard system according to claim 10 wherein said pivot means comprises a first bracket attached to said driving unit, a second bracket attached to said photoelectric conversion device, and shaft means intercoupling said brackets.
Claim 14
Dependent Claim
43 words
An electronic blackboard system according to claim 10 wherein said driving unit has roller means at a top end thereof for engagement with said guide rail, said pivot means disposed at a bottom end of the driving unit and below said roller means.
Claim 15
Dependent Claim
33 words
An electronic blackboard system according to claim 11 wherein said roller means includes at least one driven roller engaging said guide rail and at least one idler roller disposed within said guide rail.
Claim 16
Dependent Claim
209 words
An electronic blackboard system comprising: an attachment member fixed to the upper portions of an information writing board such as a white board or a blackboard attached to a wall surface or fixed to a wall surface above such an information writing board; a guide rail secured by said attachment member and horizontally disposed along an upper edge of said information writing board; a driving unit placed on said rail and moving thereon in the horizontal direction; said driving unit comprising a motor, at least one drive roller powered from the motor and disposed for contact with the top of the guide rail, and at least one idler roller disposed within said guide rail; a photoelectric conversion device, connected to said driving unit in such a manner as to face the surface of said information writing board, for reading written information; a memory for storing pieces of image information of a whole picture obtained by moving said photoelectric device in the direction intersecting the read-out line; a hard-copy device for reading out said image information stored in said memory and recording said image information; and a roller secured to the lower end of said photoelectric conversion device, said roller rolling while being in contact with said information writing board.
Claim 17
Dependent Claim
209 words
An electronic blackboard system comprising: an attachment member fixed to the upper portions of an information writing board such as a white board or a blackboard attached to a wall surface or fixed to a wall surface above such an information writing board; a guide rail secured by said attachment member and horizontally disposed along an upper edge of said information writing board; a driving unit placed on said rail and moving thereon in the horizontal direction; said driving unit comprising a motor, at least one drive roller powered from the motor and disposed for contact with the top of the guide rail, and at least one idler roller disposed within said guide rail; a photoelectric conversion device, connected to said driving unit in such a manner as to face the surface of said information writing board, for reading written information; a memory for storing pieces of image information of a whole picture obtained by moving said photoelectric device in the direction intersecting the read-out line; a hard-copy device for reading out said image information stored in said memory and recording said image information; and a roller secured to the lower end of said photoelectric conversion device, said roller rolling while being in contact with said information writing board.
Claim 18
Dependent Claim
47 words
An electronic blackboard system according to claim 14 wherein said guide rail is partially closed having a internal area defined therein for acceptance of said idler roller, said driving unit including a pair of drive rollers powered from the motor and spacedly disposed along said guide rail.
Claim 19
Dependent Claim
60 words
An electronic blackboard system according to claim 14 wherein said attachment member comprises a pair of spacedly disposed angle members, each respectively located adjacent an upper corner of the information writing board, means securing the angle members to the information writing board in such spaced apart relationship, and means securing the guide rail at ends thereof to respective angle members.
Claim 20
Dependent Claim
50 words
An electronic blackboard system according to claim 16 including means for supporting said photoelectric conversion device in a downwardly depending direction from the bottom end of said driving unit, said means for supporting comprising pivot means for enabling limited rotation of the photoelectric conversion device relative to said driving unit.
Claim 21
Dependent Claim
27 words
An electronic blackboard system according to claim 14 wherein said guide rail is substantially C-shaped having an internal area defined therein for acceptance of said idler roller.
Claim 22
Dependent Claim
31 words
An electronic blackboard system according to claim 18 including a pair of idler rollers both disposed within the internal area of said guide rail and mounted in relative orthogonally directed positions.
Claim 23
Dependent Claim
44 words
An electronic blackboard system according to claim 19 wherein one idler roller is disposed at the bottom of the guide rail in substantially horizontally disposed rotation and another idler roller is dispose at the top of the guide rail in substantially vertically disposed rotation.
Claim 24
Dependent Claim
30 words
An electronic blackboard system according to claim 20 wherein the top surface of the guide rail has the drive roller disposed thereover and has the other idler roller disposed thereunder.
References Cited (Backward Citations)
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US4609946A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |