US308040A - Drawing-board and t-square - Google Patents
Drawing-board and t-square Download PDFInfo
- Publication number
- US308040A US308040A US308040DA US308040A US 308040 A US308040 A US 308040A US 308040D A US308040D A US 308040DA US 308040 A US308040 A US 308040A
- Authority
- US
- United States
- Prior art keywords
- board
- square
- groove
- tongue
- head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000000463 material Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910001369 Brass Inorganic materials 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000000875 corresponding Effects 0.000 description 2
- 238000009877 rendering Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43L—ARTICLES FOR WRITING OR DRAWING UPON; WRITING OR DRAWING AIDS; ACCESSORIES FOR WRITING OR DRAWING
- B43L13/00—Drawing instruments, or writing or drawing appliances or accessories not otherwise provided for
- B43L13/02—Draughting machines or drawing devices for keeping parallelism
- B43L13/04—Guides for rulers
- B43L13/048—Guides for rulers with T-squares
Definitions
- Figure l of the drawings is a perspective view of my invention, and Fig. 2 a cross-section taken through the board and T square.
- the present invention has for its object to provide a combined drawing-board and T- square whereby the head of the square is at all times held true and snugly against the edge of the board, thus enabling better work to be done without the necessity of exercising the care heretofore required to keep the head of the T-square in a true line against the edge of the board.
- This object I attain by the construction substantially as shown in the drawings and hereinafter described and claimed.
- A represents the drawing-board
- B the T-sqnare.
- the drawing-board A is provided on one or more of its edges with a groove, c, preferably a dovetail groove, so as to better retain the head of the T-square against the edge of the board, and preventing it from being disconnected, except by passing or sliding the head along until it passes beyond the end of the groove, a tongue, 1), upon the inner edge of the head of the T-square engaging with the groove a, said tongue and groove being of corresponding form.
- the tongue and groove direct from the material composing the drawing-board and head of the T-square
- the groove may be made on the head of the T-square and the tongue on the edge of the drawing-board.
Landscapes
- Drawing Aids And Blackboards (AREA)
Description
(No Model.)
0. H.- PRESCOTT.
DRAWING BOARD AND T SQUARE.
Patented Nov. 11, 1884.
WITNESSES J' 6. MM 22? M ez a jfor" .dttornez N. PETERS. PhMn-Lllhognphlr. Washvvglnll, 11c.
UNITED STATES PATENT OFFICE.
CLIFFORD H. PRESCOTT, OF LAWRENCE, MASSACHUSETTS.
DRAWING-BOARD AND T-SQUARE.
SPECIFICATION forming part of Letters Patent No. 308,040, dated Ncivember 11, 1884.
Application filed July 525, 1884. (No model.)
clare that the following is a full, clear, and
exact description of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters and figures of reference marked thereon.
Figure l of the drawings is a perspective view of my invention, and Fig. 2 a cross-section taken through the board and T square.
The present invention has for its object to provide a combined drawing-board and T- square whereby the head of the square is at all times held true and snugly against the edge of the board, thus enabling better work to be done without the necessity of exercising the care heretofore required to keep the head of the T-square in a true line against the edge of the board. This object I attain by the construction substantially as shown in the drawings and hereinafter described and claimed.
in the accompanying drawings, A represents the drawing-board, and B the T-sqnare. The drawing-board A is provided on one or more of its edges with a groove, c, preferably a dovetail groove, so as to better retain the head of the T-square against the edge of the board, and preventing it from being disconnected, except by passing or sliding the head along until it passes beyond the end of the groove, a tongue, 1), upon the inner edge of the head of the T-square engaging with the groove a, said tongue and groove being of corresponding form.
Instead of making the tongue and groove direct from the material composing the drawing-board and head of the T-square, I prefer to construct the tongue and groove of brass or other suitable metal, and secure them in place by screws or other well-known means, thus rendering the tongue and groove more perfect, and fitting each other with greater accuracy than when made of wood, besides obtaining a much smoother surface between the tongue and groove, and thus enabling the head to more easily slide along the edge of the board.
Although I have shown the tongue and groove of dovetail form, and constructed scparately of metal, and afterward secured in place along the edge of the head and board, I do not desire to limit myself thereto, as any form of tongue and groove may be substituted and constructed directly from the material from which the T-square and board are made.
If preferred,the groove may be made on the head of the T-square and the tongue on the edge of the drawing-board.
Having now fully described my invention, what I claim as new, and desire to secure by Letters Patent, is
l. A drawing-board having agroove on one or more of its edges,in combination with a T- square having its head provided with a tongue, substantially as and for the purpose specified.
, 2. A drawing board and T- square connected together by a dovetail and groove, substantially as and for the purpose described.
In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.
CLIFFORD H. rsnsoorr.
,W'itnesses:
CHARLES U. BELL, CLARA F. PREsooTT.
Publications (1)
Publication Number | Publication Date |
---|---|
US308040A true US308040A (en) | 1884-11-11 |
Family
ID=2377208
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US308040D Expired - Lifetime US308040A (en) | Drawing-board and t-square |
Country Status (1)
Country | Link |
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US (1) | US308040A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3137443A (en) * | 1962-04-02 | 1964-06-16 | Samuelson Benjamin | Vector calculator |
US5845409A (en) * | 1994-06-21 | 1998-12-08 | Kimoto; Masao | Drawing board |
US6487784B1 (en) * | 2000-06-29 | 2002-12-03 | Jayson J. Powers | Portable drawing board for art students |
-
0
- US US308040D patent/US308040A/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3137443A (en) * | 1962-04-02 | 1964-06-16 | Samuelson Benjamin | Vector calculator |
US5845409A (en) * | 1994-06-21 | 1998-12-08 | Kimoto; Masao | Drawing board |
US6487784B1 (en) * | 2000-06-29 | 2002-12-03 | Jayson J. Powers | Portable drawing board for art students |
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