Patent US3813673A successfully refreshed from Google Patents.
US3813673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display panel
Assignee: Trans Lux Corp
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Filing: 1972-06-26
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Granted: 1974-05-28
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Expires: 1992-06-26
Abstract
Abstract A display panel consisting of a plurality of lines of display modules with each line having the capability of providing a plurality of characters which are produced by electrical signals through a magnetic transducer at a write position and removed by reset magnet with each line of display modules moving upwardly on an endless belt after completion of writing in a line and wherein the vertical movement of the belt is indexed in synchronism with the movement of the magnetic transducers between the write and non-write position.
Inventors
- 👤 C Holloman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:20
CPC Classifications
G; G09; G09F; G09F9/00; G09F9/30; G09F9/37; G09F9/375; G09F11/00; G09F11/12; Y; Y10; Y10S; Y10S345/00; Y10S345/903
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
307 words
A display panel including in combination, a plurality of display modules each of which is capable of forming and visually displaying a character, a plurality of lines of display modules provided by the arrangement of groups of said display modules in side by side relationship within each line, a plurality of rows of display modules provided by the modules in said lines disposed one above the other as an endless blanket, a module write position in which characters are formed in modules of one of said lines disposed therein, a read position in which lines of modules having characters formed therein are displayed to view, indexing means for moving said blanket to sequentially present a different line to said module write position and respectively remove a line from the read position while presenting a new line to the read position, a write head assembly supported within said panel, a write head writing position, write head moving means for shifting said write head assembly in and out of said write head writing position, transducer means of said write head assembly for receiving and converting character forming signals to visual characters in said modules when said modules are in said module write position and said write head assembly is in write head writing position, pawl means, a blanket stop engaging position of said pawl means, pawl moving means for moving said pawl means into and out of said blanket stop engaging position, and control means for synchronizing said indexing means and said pawl moving means and said write head moving means to present one of said lines in said module write position, said pawl means in said blanket stop engaging position and said write head assembly in said write head writing position such that the write head has moved into position after the pawl means has stopped the blanket.
Claim 2
Dependent Claim
307 words
A display panel including in combination, a plurality of display modules each of which is capable of forming and visually displaying a character, a plurality of lines of display modules provided by the arrangement of groups of said display modules in side by side relationship within each line, a plurality of rows of display modules provided by the modules in said lines disposed one above the other as an endless blanket, a module write position in which characters are formed in modules of one of said lines disposed therein, a read position in which lines of modules having characters formed therein are displayed to view, indexing means for moving said blanket to sequentially present a different line to said module write position and respectively remove a line from the read position while presenting a new line to the read position, a write head assembly supported within said panel, a write head writing position, write head moving means for shifting said write head assembly in and out of said write head writing position, transducer means of said write head assembly for receiving and converting character forming signals to visual characters in said modules when said modules are in said module write position and said write head assembly is in write head writing position, pawl means, a blanket stop engaging position of said pawl means, pawl moving means for moving said pawl means into and out of said blanket stop engaging position, and control means for synchronizing said indexing means and said pawl moving means and said write head moving means to present one of said lines in said module write position, said pawl means in said blanket stop engaging position and said write head assembly in said write head writing position such that the write head has moved into position after the pawl means has stopped the blanket.
Claim 3
Dependent Claim
41 words
A display panel in accordance with claim 1 in which each module contains upper and lower hook members formed thereon and a blanket rod is provided between each of said lines with which said hooks engage to form said endless blanket.
Claim 4
Dependent Claim
55 words
A display panel in accordance with claim 2 in which said pawl means includes a plurality of pawls each of which has a blanket rod engaging surface which engages said blanket rod in said blanket engaging position and which is shaped to encompass a portion of the surface of said blanket rod preventing bowing thereof.
Claim 5
Dependent Claim
53 words
A display panel in accordance with claim 2 in which sensing means are provided to sense the presence of a blanket rod in a predetermined position thereof to affect said indexing means to reduce the speed of movement of said blanket as said module write position is approached by one of said lines.
Claim 6
Dependent Claim
91 words
A display panel in accordance with claim 1 in which said pawl means includes a T shaped pawl with one arm thereof formed to embrace said blanket in said blanket engaging position, a pawl shaft, link means attaching the remaining arm of said pawl to said pawl shaft, a track surface formed on said display panel, wheel means on the body of said pawl riding on said track surface and said pawl moving means rocking said pawl shaft for movement of said pawl in and out of said blanket engaging position.
Claim 7
Dependent Claim
92 words
A display panel in accordance with claim 5 in which said pawl moving means includes first and second link arms, a first pivotal attachment connecting said link arms, a second pivotal attachment of the remaining end of said first arm and said link means, a breaker arm, a third pivotal attachment connecting the remaining end of said second link arm and said breaker arm, said breaker arm being movable by said control means whereby upon alignment of said first, second and third pivotal attachments said pawl is locked in blanket engaging position.
Claim 8
Dependent Claim
195 words
A display panel in accordance with claim 1 in which each module contains a plurality of pivotally mounted, light reflective, character forming flag members and a display magnet mounted on each flag member whereby the influence of a magnetic field determines the position of each of said flag members and pins of each of said modules formed of a square loop magnetizable material projecting rearwardly of said respective module in operative association with respective display magnets and said transducer means includes magnetizing means cooperable with each of said non-display magnets sequentially to determine the position of said respective flag members by affecting the magnetization of said pins, and a non-display magnet supported within said panel with its magnetic field diposed so that lines pass therethrough prior to entering the module write position, with the field direction of the non-display magnet such that each of said pins as it enters its field is saturated and placed on a known position of the hysterisis curve and continued movement through the field brings respective pins into positions where reversal takes place providing a predetermined magnetization condition of each pin prior to its entry into the module write position.
Claim 9
Dependent Claim
130 words
A display panel in accordance with claim 1 in which said write head assembly includes a write head carrier supporting said transducer means and said transducer means consists of a printed circuit board, posts supporting said printed circuit board on said write head carrier in spaced relation thereto and a write head mounted on said printed circuit board, and in which holes are provided in said printed circuit board through which enlarged head pins project for engagement in said posts, said holes being slightly larger than said pins, friction washers disposed upon said circuit board on either side of said hole, and spring means are provided yieldingly urging said printed circuit board away from said posts and in contact with the heads of said pins providing a friction memory mount.
Claim 10
Dependent Claim
15 words
A display panel in accordance with claim 8 in which said posts are flex rods.
Claim 11
Dependent Claim
111 words
A display panel in accordance with claim 1 in which said write head assembly includes a write head carrier supporting said transducer means and said transducer means consists of a printed circuit board, posts supporting said printed circuit board on said write head carrier in spaced relation thereto and a write head mounted on said printed circuit board, and in which each of said modules includes a plurality of rearwardly projecting pins and each of said write heads includes a plurality of solenoids each of which is received to receive a respective pin as the core thereof with the entrance to said solenoid being in the form of a bell mouth.
Claim 12
Dependent Claim
21 words
A display panel in accordance with claim 10 in which the face of said write head is covered with silicon rubber.
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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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |