US2825999A - Drafting board with machined edge guide - Google Patents

Drafting board with machined edge guide Download PDF

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Publication number
US2825999A
US2825999A US520270A US52027055A US2825999A US 2825999 A US2825999 A US 2825999A US 520270 A US520270 A US 520270A US 52027055 A US52027055 A US 52027055A US 2825999 A US2825999 A US 2825999A
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board
edges
edge
metal
edge guide
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US520270A
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Dompieri Otto
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    • 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
    • B43L5/00—Drawing boards

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  • This invention relates to drawing boards, and more particularly to drawing boards of the type having metal side edges for maintaining a true edge for drawing purposes.
  • Drawing boards have customarily been made of wood and it has long been recognized that metal edges are desirable for the side edges of the board to provide reinforcement against warping and at the same time provide a true edge for the T square generally used with drawing boards.
  • the primary object of the present invention is to provide an improved method of applying metal inserts to the lateral edges of a drawing board.
  • a further object of the invention is to provide an inexpensive drawing board of improved efliciency, simplified manufacture and improved appearance.
  • Figure 1 is a perspective view of a drawing board embodying the present invention
  • Figure 2 is an enlarged perspective view of one of the metal edge inserts
  • Figure 3 is an enlarged vertical sectional view through a metal edge insert and an end section of the drawing board just prior to assembly;
  • Figure 4 is an enlarged vertical sectional view taken on the line 44 of Figure 1;
  • Figure 5 is a perspective view of a slightly modified form of drawing board
  • Figure 6 is an enlarged perspective view of the metal edge insert shown in Figure 5.
  • Figure 7 is a plan view of the board shown in Figure 5 with a section of the board broken away.
  • the drawing board comprises a wooden body 10 having along each of its side edges a rectangular groove 11 intermediate of the upper and lower faces of the body and terminating at the front and rear edges of the board, and metallic members 12 extending entirely along the side edges of the board and anchored thereto.
  • Each of the metallic members 12, consists of a T-shaped bar having a substantially rectangular leg 13 of approximately the same size as rectangular groove 11 to have a tight fit therewith, and the cross bar 14 having a width slightly less than the thickness of the board 10 as clearly shown in Figure 4.
  • the upper and lower surfaces of the leg 13 are provided with grooves 15.
  • the cross bar 14 has its outer face planed and ground to a perfectly straight and true surface and has its inner face slightly recessed at 16 for a purpose to appear.
  • the edges of the metal members 12 are beveled at 17 to enhance the appearance of the board.
  • the grooves are filled with a suitable adhesive 18, the leg 13 innited States Patent 0 2,825,999 Patented Mar. 11, 1958 serted in the groove 11 and the metal edge driven home with the ends of the metal edge flush with the front and rear edges of the board. Since the leg 13 has a fairly tight fit with the groove 11, some of the adhesive in the grooves 15 will spread and cover the surface of the groove as seen in Figure 4, thereby insuring adhesive contact throughout between the leg and the groove 11. Any excess adhesive flowing out of the groove 11 will be trapped in the space formed between the recessed portions 16 and the side edges of the board.
  • the board is indicated by numeral 19, the metal edge members by numeral 20 and the groove in the board by numeral 21.
  • the groove 21 does not ex tend to the front and rear edges of the board and is provided with curved surfaces 22, as seen in Figure 7.
  • the metal edge 20 is the same as the metal edge 12 shown in the first form except that the end portions of the leg 23 are cut away to form curved edges 24 to lie against curved surfaces 22.
  • the leg 23 is provided with grooves 25 similar to the grooves 15.
  • the manner of assembly is the same as that described in connection with the form of invention shown in Figures 1 to 4.
  • the metal edges terminate short of the front and rear edges of the board.
  • a planar warpable body to be used with a T square, a planar warpable body, opposite sides of which providing planar surfaces upon which drafting paper may be secured, a groove formed in the side edge of said body between the opposite sides thereof, a rigid metal edge strip secured by an adhesive material in said groove to prevent warpage of said body, said edge strip having a T-shaped cross section providing a head normal to a leg, said leg including longitudinal grooves on opposite sides thereof to receive adhesive material therein to insure anchoring of said strip on said body, upper and lower edges of said head terminating below the opposite sides of said body and beyond the side edge thereof for obviating interference with sheets of drawing paper slid across the side of the body used during drafting, the outer surface of said head comprising a machined surface affording a true edge for receiving the head of a T square, the inner surface of said head diverging from the upper and lower edges of said head toward the intersection of said head and leg for providing a space to receive excessive adhesive material therein which is

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Description

March 11, 1958 v o. DOMPIERI DRAFTING BOARD WITH MACHINED EDGE GUIDE 2 Sheets-Sheec 1 Filed July 6, 1955 O l. I
' INVENTOR Orro .DOMP/E2/ fiw %ATTORNEY March 11, 1958 o. DOMPIERI 2,825,999
DRAFTING BOARD WITH MACHINED EDGE GUIDE Filed July 6, 1955 2 Sheets-Sheet 2 INVENTOR Orro floM nse/ ATTORNEY DRAFTING BOARD WITH MACHINED EDGE GUIDE Otto Dompieri, North Plainfield, N. J.
Application July 6, 1955, Serial No. 520,270
1 Claim. (Cl. 45-131) This invention relates to drawing boards, and more particularly to drawing boards of the type having metal side edges for maintaining a true edge for drawing purposes.
Drawing boards have customarily been made of wood and it has long been recognized that metal edges are desirable for the side edges of the board to provide reinforcement against warping and at the same time provide a true edge for the T square generally used with drawing boards.
It has also been customary to space the metal edges from the faces of the board so as not to interfere with the use of either face of the board as a drawing surface and also so as to provide an uninterrupted wood surface to receive the usual thumb tacks even at the extreme lateral edges of the board.
The primary object of the present invention is to provide an improved method of applying metal inserts to the lateral edges of a drawing board.
A further object of the invention is to provide an inexpensive drawing board of improved efliciency, simplified manufacture and improved appearance.
Other objects and advantages of the present invention will be apparent from the following description taken in connection with the accompanying drawings, wherein:
Figure 1 is a perspective view of a drawing board embodying the present invention;
Figure 2 is an enlarged perspective view of one of the metal edge inserts;
Figure 3 is an enlarged vertical sectional view through a metal edge insert and an end section of the drawing board just prior to assembly;
Figure 4 is an enlarged vertical sectional view taken on the line 44 of Figure 1;
Figure 5 is a perspective view of a slightly modified form of drawing board;
Figure 6 is an enlarged perspective view of the metal edge insert shown in Figure 5; and
Figure 7 is a plan view of the board shown in Figure 5 with a section of the board broken away.
Referring in detail to the modification shown in Figures 1 to 4, the drawing board comprises a wooden body 10 having along each of its side edges a rectangular groove 11 intermediate of the upper and lower faces of the body and terminating at the front and rear edges of the board, and metallic members 12 extending entirely along the side edges of the board and anchored thereto.
Each of the metallic members 12, consists of a T-shaped bar having a substantially rectangular leg 13 of approximately the same size as rectangular groove 11 to have a tight fit therewith, and the cross bar 14 having a width slightly less than the thickness of the board 10 as clearly shown in Figure 4. The upper and lower surfaces of the leg 13 are provided with grooves 15. The cross bar 14 has its outer face planed and ground to a perfectly straight and true surface and has its inner face slightly recessed at 16 for a purpose to appear. The edges of the metal members 12 are beveled at 17 to enhance the appearance of the board.
To assemble the metal ends and the board, the grooves are filled with a suitable adhesive 18, the leg 13 innited States Patent 0 2,825,999 Patented Mar. 11, 1958 serted in the groove 11 and the metal edge driven home with the ends of the metal edge flush with the front and rear edges of the board. Since the leg 13 has a fairly tight fit with the groove 11, some of the adhesive in the grooves 15 will spread and cover the surface of the groove as seen in Figure 4, thereby insuring adhesive contact throughout between the leg and the groove 11. Any excess adhesive flowing out of the groove 11 will be trapped in the space formed between the recessed portions 16 and the side edges of the board.
In the modification shown in Figures 5 to 7, the board is indicated by numeral 19, the metal edge members by numeral 20 and the groove in the board by numeral 21. In this form of the invention, the groove 21 does not ex tend to the front and rear edges of the board and is provided with curved surfaces 22, as seen in Figure 7. The metal edge 20 is the same as the metal edge 12 shown in the first form except that the end portions of the leg 23 are cut away to form curved edges 24 to lie against curved surfaces 22. The leg 23 is provided with grooves 25 similar to the grooves 15. The manner of assembly is the same as that described in connection with the form of invention shown in Figures 1 to 4. In this form of the invention, the metal edges terminate short of the front and rear edges of the board.
From the foregoing description, the advantages of the present construction will be readily apparent to those skilled in the art. While I have shown the invention applied to a metal edge drawing board, it will be apparent that the invention may be applied to drawing tables or any other form of table top where a metal edge is desirable. While I have shown two modifications of the invention, other modifications and changes in details may be made without departing from the spirit of the invention except as may be required by the scope of the following claim:
Having thus described the invention, what is claimed In a drafting board to be used with a T square, a planar warpable body, opposite sides of which providing planar surfaces upon which drafting paper may be secured, a groove formed in the side edge of said body between the opposite sides thereof, a rigid metal edge strip secured by an adhesive material in said groove to prevent warpage of said body, said edge strip having a T-shaped cross section providing a head normal to a leg, said leg including longitudinal grooves on opposite sides thereof to receive adhesive material therein to insure anchoring of said strip on said body, upper and lower edges of said head terminating below the opposite sides of said body and beyond the side edge thereof for obviating interference with sheets of drawing paper slid across the side of the body used during drafting, the outer surface of said head comprising a machined surface affording a true edge for receiving the head of a T square, the inner surface of said head diverging from the upper and lower edges of said head toward the intersection of said head and leg for providing a space to receive excessive adhesive material therein which is squeezed out of said groove when the leg is inserted therein during assembly of said board.
References Cited in the file of this patent UNITED STATES PATENTS 2,030,730 Wilson Feb. 11, 1936 2,272,058 Dieter et al. Feb. 3, 1942 2,509,037 Flicker May 23, 1950 2,717,187 Morgan et a1. Sept. 6, 1955 2,734,789 Wilson Feb. 14, 1956 FOREIGN PATENTS 737,244 Germany July 9, 1.943
US520270A 1955-07-06 1955-07-06 Drafting board with machined edge guide Expired - Lifetime US2825999A (en)

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3106401A (en) * 1961-05-12 1963-10-08 Shampaine Ind Inc Game boards
US3300928A (en) * 1963-11-22 1967-01-31 Kalwall Corp Structural building panels
US3362124A (en) * 1965-04-09 1968-01-09 Osmose Wood Preserving Co Method of reinforcing deteriorated sections of timber and means of carrying out the same
US3363388A (en) * 1964-08-03 1968-01-16 Hiba Beschaffungsring G M B H Prefabricated units
US3590754A (en) * 1969-07-11 1971-07-06 Daystrom Virtue Inc Edge bandings for articles of furniture
USD242799S (en) * 1975-05-27 1976-12-21 Capitol Products Corporation Plastic thermal barrier frames and the like
US4199910A (en) * 1978-08-23 1980-04-29 Priore Alfred J T-shaped edge finishing strips and their production
US5157891A (en) * 1987-03-31 1992-10-27 Nelson Thomas J Furniture edge construction
US6910310B2 (en) * 2002-09-03 2005-06-28 Braided Accents Llc Chair rail system and method
US7055918B2 (en) * 2001-07-27 2006-06-06 Lachance James L Attachment element for joining a backplash to a countertop
US20080127588A1 (en) * 2006-06-12 2008-06-05 Wayner Robert C Trim end cap assembly
US20090000237A1 (en) * 2007-06-11 2009-01-01 Borgman Randall W Trim assembly
US20090108719A1 (en) * 2007-10-26 2009-04-30 Klickit Products, L.L.C. Apparatus and method for attaching a backsplash to a countertop
US20200054124A1 (en) * 2018-08-17 2020-02-20 Nice Production Co., Ltd. Reading desk deformation preventing structure

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2030730A (en) * 1935-05-23 1936-02-11 Walter E Wilson Molding strip
US2272058A (en) * 1938-10-18 1942-02-03 Libbey Owens Ford Glass Co Table top, counter top, or the like
DE737244C (en) * 1941-10-14 1943-07-09 Dresdner Tischfabrik Hermann M Fastening glued-in wooden edge strips on pieces of furniture
US2509037A (en) * 1948-07-10 1950-05-23 Flicker Jakob Edging for table tops
US2717187A (en) * 1953-08-13 1955-09-06 American Seating Co Laminated table top with edging
US2734789A (en) * 1956-02-14 Molding for table and counter tops

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2734789A (en) * 1956-02-14 Molding for table and counter tops
US2030730A (en) * 1935-05-23 1936-02-11 Walter E Wilson Molding strip
US2272058A (en) * 1938-10-18 1942-02-03 Libbey Owens Ford Glass Co Table top, counter top, or the like
DE737244C (en) * 1941-10-14 1943-07-09 Dresdner Tischfabrik Hermann M Fastening glued-in wooden edge strips on pieces of furniture
US2509037A (en) * 1948-07-10 1950-05-23 Flicker Jakob Edging for table tops
US2717187A (en) * 1953-08-13 1955-09-06 American Seating Co Laminated table top with edging

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3106401A (en) * 1961-05-12 1963-10-08 Shampaine Ind Inc Game boards
US3300928A (en) * 1963-11-22 1967-01-31 Kalwall Corp Structural building panels
US3363388A (en) * 1964-08-03 1968-01-16 Hiba Beschaffungsring G M B H Prefabricated units
US3362124A (en) * 1965-04-09 1968-01-09 Osmose Wood Preserving Co Method of reinforcing deteriorated sections of timber and means of carrying out the same
US3590754A (en) * 1969-07-11 1971-07-06 Daystrom Virtue Inc Edge bandings for articles of furniture
USD242799S (en) * 1975-05-27 1976-12-21 Capitol Products Corporation Plastic thermal barrier frames and the like
US4199910A (en) * 1978-08-23 1980-04-29 Priore Alfred J T-shaped edge finishing strips and their production
US5469685A (en) * 1987-03-31 1995-11-28 Ralph Wilson Plastics Company Furniture edge construction
US5157891A (en) * 1987-03-31 1992-10-27 Nelson Thomas J Furniture edge construction
US5613342A (en) * 1987-03-31 1997-03-25 Wilsonart International Inc. Furniture edge construction
US7055918B2 (en) * 2001-07-27 2006-06-06 Lachance James L Attachment element for joining a backplash to a countertop
US6910310B2 (en) * 2002-09-03 2005-06-28 Braided Accents Llc Chair rail system and method
US20080127588A1 (en) * 2006-06-12 2008-06-05 Wayner Robert C Trim end cap assembly
US20090000237A1 (en) * 2007-06-11 2009-01-01 Borgman Randall W Trim assembly
US20090108719A1 (en) * 2007-10-26 2009-04-30 Klickit Products, L.L.C. Apparatus and method for attaching a backsplash to a countertop
US20200054124A1 (en) * 2018-08-17 2020-02-20 Nice Production Co., Ltd. Reading desk deformation preventing structure

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