Patent US4288936A successfully refreshed from Google Patents.
US4288936A
Expired / Lapsed
US
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Wall-hanging type magnetic displaying device
Assignee: Pilot Corp
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Filing: 1979-10-11
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Granted: 1981-09-15
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Expires: 1999-10-11
Abstract
Abstract A magnetic displaying device adapted for hanging on a wall including a displaying panel made of a hanging panel and a parallel disposed magnetic displaying panel between which is disposed a liquid containing magnetic particles. A translatable erasing magnet is arranged perpendicular to the downward direction of the device and coupled to a magnet lifting mechanism. The erasing magnet rests at either the upper or lower end of the panel and moves up and down through guiding means such as rails. A string or the like coupled to the lifting mechanism is pulled downwardly to move the erasing magnet.
Inventors
- 👤 Hiroyasu Okutsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:25
CPC Classifications
B; B43; B43L; B43L1/00; B43L1/008; G; G09; G09F; G09F9/00; G09F9/30; G09F9/37; G09F9/375
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
246 words
A wall-hanging type magnetic displaying device comprising: A. A displaying panel comprising: a. a hanging panel disposed parallel to a panel having a magnetic displaying section incorporating a liquid in which magnetic particles are dispersed, a predetermined space being provided between said hanging panel and said panel having a magnetic displaying section; b. an erasing magnet member, means for moving said erasing magnet member including means for biasing said erasing magnet member in one direction and, means fixedly secured to at least one of said panels for retaining said biasing means; c. said erasing magnet member having an elongated magnet arranged with the elongate direction perpendicular to the downward direction of said device hung and connected to one end of said biasing means so that said magnet is positioned at rest at an upper or lower end portion of said panel due to bias in one direction; d. guide means provided on at least one of said panels for guiding said erasing magnet member; and e. operating means connected to one of said means for biasing and erasing magnet member so that said operating means extends along the downward direction of the device to move said erasing magnet member in a direction opposite to the bias direction and wherein upon release of said operating means said erasing magnet member reciprocates due to said bias to be restored to the rest position; and B. a displaying magnet adapted to move the magnetic particles in said dispersed liquid.
Claim 2
Dependent Claim
246 words
A wall-hanging type magnetic displaying device comprising: A. A displaying panel comprising: a. a hanging panel disposed parallel to a panel having a magnetic displaying section incorporating a liquid in which magnetic particles are dispersed, a predetermined space being provided between said hanging panel and said panel having a magnetic displaying section; b. an erasing magnet member, means for moving said erasing magnet member including means for biasing said erasing magnet member in one direction and, means fixedly secured to at least one of said panels for retaining said biasing means; c. said erasing magnet member having an elongated magnet arranged with the elongate direction perpendicular to the downward direction of said device hung and connected to one end of said biasing means so that said magnet is positioned at rest at an upper or lower end portion of said panel due to bias in one direction; d. guide means provided on at least one of said panels for guiding said erasing magnet member; and e. operating means connected to one of said means for biasing and erasing magnet member so that said operating means extends along the downward direction of the device to move said erasing magnet member in a direction opposite to the bias direction and wherein upon release of said operating means said erasing magnet member reciprocates due to said bias to be restored to the rest position; and B. a displaying magnet adapted to move the magnetic particles in said dispersed liquid.
Claim 3
Dependent Claim
35 words
The device as claimed in claim 1 in which a plurality of sets of means for moving said erasing magnet members, erasing magnet members, guide means and operating means are provided on one hanging panel.
Claim 4
Dependent Claim
28 words
A device as claimed in claim 1 or 2 in which said biasing means comprises a spring and said operating means is coupled to said erasing magnet member.
Claim 5
Dependent Claim
23 words
A device as claimed in claim 1 or 2 in which said biasing means comprises a string member laid over said retaining means.
Claim 6
Dependent Claim
34 words
A device as claimed in claim 1 or 2 in which said magnet in said erasing magnet member of said displaying panel is spaced apart from the rear surface of said magnetic displaying section.
Claim 7
Dependent Claim
29 words
A device as claimed in claim 1 or 2 in which said erasing magnet member of said displaying panel further comprises a magnet holding means for holding said magnet.
Claim 8
Dependent Claim
64 words
A device as claimed in claim 1 or 2 in which said erasing magnet member of said displaying panel comprises: a magnet; a magnet holding means for holding said magnet; and a link mechanism provided between said magnet holding means and said panel and coupled to said magnet holding means and said panel in such a manner that said link mechanism is stretchable vertically.
Claim 9
Dependent Claim
20 words
A device as claimed in claim 1 or 2 in which said guide means of said displaying panel comprise rails.
Claim 10
Dependent Claim
24 words
A device as claimed in claim 1 or 2 in which said guide means of said displaying panel are string-like parts laid over pulleys.
Claim 11
Dependent Claim
20 words
A device as claimed in claim 1 or 2 in which said operating means of said displaying panel is rigid.
Claim 12
Dependent Claim
25 words
A device as claimed in claim 1 or 2 in which said operating means of said displaying panel is coupled to a string-like biasing means.
Claim 13
Dependent Claim
29 words
A device as claimed in claim 1 or 2 in which said displaying magnet is one in which a magnet is provided on the top of a cylindrical body.
References Cited (Backward Citations)
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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) | 1984-09-14 | 1985-03-16 | 1985-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-14 | 1989-03-16 | 1989-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-14 | 1993-03-16 | 1993-09-15 | $7700.00 | Window Closed / Lapsed |