Patent US4905465A successfully refreshed from Google Patents.
US4584779A
Expired / Lapsed
US
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Trimming square set
Assignee: Individual
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Filing: 1984-10-20
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Granted: 1986-04-29
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Expires: 2004-10-20
Abstract
Abstract Disclosed herein is a trimming square set suitable for trimming photographic films, drawings or the like into arbitrary rectangular shapes. The square set utilized the rule that the four apices of a rectangle are invariably located on one circumference, permitting to form a rectangle of a desired size in an extremely facilitated manner by means of a first square member rotatably mounted on a base plate, a second square member rotatably mounted on a slide plate which is slidable on the base plate, and a circular hole provided in the base plate. Similar rectangles of different sizes can be formed easily by sliding the slide plate on the base plate.
Inventors
- 👤 Hiroto Wakamatsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:48
CPC Classifications
B; B43; B43L; B43L7/00; B43L7/10; B43L7/12; B43L7/125; G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/58; G03B27/582; Y; Y10; Y10S; Y10S33/00; Y10S33/09
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
175 words
A trimming square set comprising in combination: a base plate having a circular opening therein; a first square member having inner edges set at right angles to each other and pivotally supported on the base plate by a pin member located at a position proximate to the peripheral edge of the circular opening of said base plate, at a point proximate to an intersecting point of said inner edges; a slide plate being slidingly movable on said base plate in a direction parallel with an imaginary line passing through the centers of said pin member and circular opening and provided with a semi-circular notch congruently with the peripheral edge of said circular opening of said base plate; and a second square member having inner edges set at right angles to each other and pivotally supported on said slide plate by a second pin member located on said imaginary line and in a position proximate to the peripheral edge of said semi-circular notch, at a point proximal to the intersecting point of the inner edges thereof.
Claim 2
Dependent Claim
175 words
A trimming square set comprising in combination: a base plate having a circular opening therein; a first square member having inner edges set at right angles to each other and pivotally supported on the base plate by a pin member located at a position proximate to the peripheral edge of the circular opening of said base plate, at a point proximate to an intersecting point of said inner edges; a slide plate being slidingly movable on said base plate in a direction parallel with an imaginary line passing through the centers of said pin member and circular opening and provided with a semi-circular notch congruently with the peripheral edge of said circular opening of said base plate; and a second square member having inner edges set at right angles to each other and pivotally supported on said slide plate by a second pin member located on said imaginary line and in a position proximate to the peripheral edge of said semi-circular notch, at a point proximal to the intersecting point of the inner edges thereof.
Claim 3
Dependent Claim
33 words
The trimming square set of claim 1, wherein said base plate is provided with a scale of length-to-width ratio of the rectangle formed by inner edges of said first and second square members.
Claim 4
Dependent Claim
28 words
The trimming square set of claim 2, wherein said circular opening of said base plate is provided with a scale of length-to-width ratio along the peripheral edge thereof.
Claim 5
Dependent Claim
28 words
The trimming square set of claim 2, wherein said semi-circular notch of said slide plate is provided with a scale of length-to-width ratio along the peripheral edge thereof.
Claim 6
Dependent Claim
49 words
The trimming square set of claims 1, 2, 3 or 4, wherein said base plate is provided with a scale of areal reduction ratio on part of outer frames thereof, indicating the areal reduction ratio of the rectangle formed by inner edges of said first and second square members.
Claim 7
Dependent Claim
28 words
The trimming square set of claim 5, wherein said scale of areal reduction ratio is provided with outer frame portions along the longer sides of said base plate.
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) | 1989-04-28 | 1989-10-28 | 1990-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-28 | 1993-10-28 | 1994-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-28 | 1997-10-28 | 1998-04-29 | $7700.00 | Window Closed / Lapsed |