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US4164824A Expired / Lapsed US ⏱️ 0.0 years remaining

Changeable character sign structure

Assignee: 3M Co
•
Filing: 1978-07-14
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Granted: 1979-08-21
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Expires: 1998-07-14
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Abstract

Abstract Sign having self-storing characters which are quickly changeable. The face of the sign has a patterned array of openings juxtaposed against a contrasting background. The background may be supplied by color contrast and/or by illumination.

Inventors

  • 👤 James G. Nidelkoff

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 09:06
CPC Classifications
G; G09; G09F; G09F9/00; G09F9/30; G09F9/37

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 126 words
A sign face structure having changeable characters, comprising: a plate having front and rear surfaces and having a patterned array of rectangular openings; shutter plates being adapted for sliding movement between a forward position closing said plate openings and a retracted position substantially out of said plate openings: bracket means affixed to the rear surface of said plate for slidably mounting said shutter plates; and latch means for securing said shutter plates in the forward or retracted position, said latch means comprising a magnetizable flange extending transversely from said shutter plate; and a magnet positioned proximate the position of said flange corresponding to a position selected from the forward position or the retracted position of said shutter plate for retaining said shutter plate in that position.
Claim 2
Dependent Claim 126 words
A sign face structure having changeable characters, comprising: a plate having front and rear surfaces and having a patterned array of rectangular openings; shutter plates being adapted for sliding movement between a forward position closing said plate openings and a retracted position substantially out of said plate openings: bracket means affixed to the rear surface of said plate for slidably mounting said shutter plates; and latch means for securing said shutter plates in the forward or retracted position, said latch means comprising a magnetizable flange extending transversely from said shutter plate; and a magnet positioned proximate the position of said flange corresponding to a position selected from the forward position or the retracted position of said shutter plate for retaining said shutter plate in that position.
Claim 3
Dependent Claim 142 words
A sign face structure having changeable characters, comprising: a first, front plate having a patterned array of rectangular openings; a second, back plate having a front surface, at least the portions of the front surface corresponding to said front plate openings being visually contrasting relative to said front plate; a third plate between said front and back plates and having openings therein, a first portion of a third plate opening being aligned with a front plate opening and a second portion being offset from the front plate opening; shutter plates positioned within said third plate openings and retained between said front and back plates for slideable movement between a forward position closing said front plate openings and a retracted position substantially out of said front plate openings, and latch means for securing each said shutter plates in the forward or retracted position.
Claim 4
Dependent Claim 142 words
A sign face structure having changeable characters, comprising: a first, front plate having a patterned array of rectangular openings; a second, back plate having a front surface, at least the portions of the front surface corresponding to said front plate openings being visually contrasting relative to said front plate; a third plate between said front and back plates and having openings therein, a first portion of a third plate opening being aligned with a front plate opening and a second portion being offset from the front plate opening; shutter plates positioned within said third plate openings and retained between said front and back plates for slideable movement between a forward position closing said front plate openings and a retracted position substantially out of said front plate openings, and latch means for securing each said shutter plates in the forward or retracted position.
Claim 5
Dependent Claim 54 words
The sign face structure of claim 2 wherein said latch means comprises: a magnetizable flange extending from one side of said shutter plate; and a magnet positioned proximate the position of said flange corresponding to the forward position or the retracted position of said shutter plate for retaining said shutter plate in that position.
Claim 6
Dependent Claim 38 words
The sign structure of claim 2 or 3 wherein at least the portions of the back plate corresponding to the front plate openings afford said contrasting appearance by said back plate being one of translucent and transparent material.
Claim 7
Dependent Claim 120 words
A sign structure having changeable characters, comprising: a sign face of a predetermined color and having a patterned array of openings; shutters mounted to said sign face, one to an opening, each of said shutters having a plate mounted for sliding movement between a first and second position, at least a first surface portion of each shutter being of a predetermined color which is the same as, or contrasts with, the sign face color, and each shutter being movable between said first position for displaying said first surface portion in said opening and said second position wherein said first surface portion is not visible at said opening; and latch means for securing said shutters in said first or second position.
Claim 8
Dependent Claim 120 words
A sign structure having changeable characters, comprising: a sign face of a predetermined color and having a patterned array of openings; shutters mounted to said sign face, one to an opening, each of said shutters having a plate mounted for sliding movement between a first and second position, at least a first surface portion of each shutter being of a predetermined color which is the same as, or contrasts with, the sign face color, and each shutter being movable between said first position for displaying said first surface portion in said opening and said second position wherein said first surface portion is not visible at said opening; and latch means for securing said shutters in said first or second position.

References Cited (Backward Citations)

US1357457A Cited
US1755315A Cited
US3096594A Cited
US3362093A Cited
US3792540A Cited
US4024532A Cited
US4063377A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-08-20 1983-02-19 1983-08-21 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-08-20 1987-02-19 1987-08-21 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-08-20 1991-02-19 1991-08-21 $7700.00 Window Closed / Lapsed

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