US903648A - T-square. - Google Patents

T-square. Download PDF

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Publication number
US903648A
US903648A US42330008A US1908423300A US903648A US 903648 A US903648 A US 903648A US 42330008 A US42330008 A US 42330008A US 1908423300 A US1908423300 A US 1908423300A US 903648 A US903648 A US 903648A
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US
United States
Prior art keywords
blade
square
head
recess
edges
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
Application number
US42330008A
Inventor
Edwin B Wiles
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ERNEST A VAN VLECK
Original Assignee
ERNEST A VAN VLECK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ERNEST A VAN VLECK filed Critical ERNEST A VAN VLECK
Priority to US42330008A priority Critical patent/US903648A/en
Application granted granted Critical
Publication of US903648A publication Critical patent/US903648A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/56—Gauges for measuring angles or tapers, e.g. conical calipers
    • G01B3/566—Squares
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/30—Dovetail-like connections

Definitions

  • T squares have commonly been made with the blade fixed in the head, which latter is either a unitary structure or a divided member, and when the head is divided, one part thereof has generally been fixed to the blade and the other part made adjustable by a clamp screw or other suitable means.
  • the parts thereof are not readily separable and from the very nature of an instrument of this description, it occupies a useless amount ofspace when not in use or in being carried about.
  • the object of my invention is therefore the provision of a T square or similar instrument Whose parts are readily separable when not in use, and the further object of my invention is to provide a T square in which the edges of the blade may be readily trued without impairing the instrument.
  • the T square preferably comprises a head, a blade and means on one of these members adapted to enter a portion provided therefor in the other member to separably join and frictionally hold the parts together.
  • Figure 1 is a plan view of a T square in which my present invention is embodied.
  • Fig. 2 is a plan view of a portion of the head member with the blade removed.
  • Fig. 3 is a partial end view of the same and
  • Fig. 4: is an inverted plan view of the end of the blade member.
  • Fig. is an edge view of the same.
  • Fig. 6 is an enlarged cross section taken on the line :11, m, Fig. 1'.
  • a designates the head member of a T square and Z) the blade member thereof, which parts as will be understood, may be made of metal, hard rubber or any other suitable material.
  • the head member a in one side thereof is provided with a recess 0, the opposite edges of which are preferably converging and undercut as indicated at (Z.
  • One end of the blade member 5 is provided with a raised portion indicated at e which as will be understood, may be made of any suitable material and may be glued or connected to the blade member by screws, or secured thereto in any other desired manner.
  • this raised portion 6, adjacent to the converging edges of the blade member 6, are also converging and undercut as indicated at f, the angle of convergence of the edges of the member 6 being the same as that of the edges of the recess 0 and preferably the angle at which the edges of the raised member 6 are undercut, corresponds with the angle at which the edges of the recess 0 are undercut, so that the raised member e is adapted to enter and fit within the recess a to separably join the parts together in frictional contact, and also the thickness of the raised member 6 is preferably slightly less than the depth of the recess 0 so that the fit will be free and there will also be a binding frictional contact between those portions 9 of the underside of the blade 6 and the adjacent portions of the said member a.
  • a T-square comprising a blade and a head, a raised engaging portion upon one of said parts in a plane beyond one surface thereof and the other part having a recess below one surface thereof to receive said raised engaging portion of the other member when said surfaces come in juxtaposition to connect said members and hold them together frictionally in a separable relation.
  • a T square comprising a head having a recess, a blade, a raised portion having undercut converging edges secured to the said blade and adapted to enter the recess in the said head to separably join and frictionally hold the members together.
  • a T square comprising a head having a recess extending across the same and whose edges are converging and undercut, a blade and a raised portion secured to the surface of the said blade at one end thereof, the opposite edges of the said raised portion being converging and undercut and adapted to enter the said recess in the said head.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Toys (AREA)

Description

E. B. WILES. I
V T-SQUARE. APPLICATION FILED MAR. 26, 1908.
Patented Nov. 10, 1908.
1 III I! I I UNITED STA'I YE IETENT OFFICE.
EDWIN B. WILES, OF NEW YORK, N. Y., ASSIGNOR OF FORTY-FIVE ONE-HUNDREDTHS TO HIMSELF AND FIFTY-FIVE ONE-HUNDREDTHS TO ERNEST A. VAN VLEOK, OF NEW YORK, N. Y.
T-S QUARE Patented Nov. 10, 1908.
Application filed March 26, 1908. Serial No. 423,300.
To all whom it may concern:
Be it known that I, EDWIN B. lVILns, a citizen of the United States, residing in the borough of Bronx, city, county, and State of New York, have invented an Improvement in T-Squares, of which the following is a specification.
This invention relates to an improvement in T squares. Heretofore so far as I am aware, T squares have commonly been made with the blade fixed in the head, which latter is either a unitary structure or a divided member, and when the head is divided, one part thereof has generally been fixed to the blade and the other part made adjustable by a clamp screw or other suitable means. In T squares of this construction, the parts thereof are not readily separable and from the very nature of an instrument of this description, it occupies a useless amount ofspace when not in use or in being carried about.
The object of my invention is therefore the provision of a T square or similar instrument Whose parts are readily separable when not in use, and the further object of my invention is to provide a T square in which the edges of the blade may be readily trued without impairing the instrument.
In carrying out my invention, the T square preferably comprises a head, a blade and means on one of these members adapted to enter a portion provided therefor in the other member to separably join and frictionally hold the parts together.
In the drawing, Figure 1 is a plan view of a T square in which my present invention is embodied. Fig. 2 is a plan view of a portion of the head member with the blade removed. Fig. 3 is a partial end view of the same and Fig. 4: is an inverted plan view of the end of the blade member. Fig. is an edge view of the same. Fig. 6 is an enlarged cross section taken on the line :11, m, Fig. 1'.
Referring particularly to the drawings, a designates the head member of a T square and Z) the blade member thereof, which parts as will be understood, may be made of metal, hard rubber or any other suitable material. The head member a in one side thereof is provided with a recess 0, the opposite edges of which are preferably converging and undercut as indicated at (Z. One end of the blade member 5 is provided with a raised portion indicated at e which as will be understood, may be made of any suitable material and may be glued or connected to the blade member by screws, or secured thereto in any other desired manner. The opposite edges of this raised portion 6, adjacent to the converging edges of the blade member 6, are also converging and undercut as indicated at f, the angle of convergence of the edges of the member 6 being the same as that of the edges of the recess 0 and preferably the angle at which the edges of the raised member 6 are undercut, corresponds with the angle at which the edges of the recess 0 are undercut, so that the raised member e is adapted to enter and fit within the recess a to separably join the parts together in frictional contact, and also the thickness of the raised member 6 is preferably slightly less than the depth of the recess 0 so that the fit will be free and there will also be a binding frictional contact between those portions 9 of the underside of the blade 6 and the adjacent portions of the said member a.
I claim as my invention:
1. A T-square comprising a blade and a head, a raised engaging portion upon one of said parts in a plane beyond one surface thereof and the other part having a recess below one surface thereof to receive said raised engaging portion of the other member when said surfaces come in juxtaposition to connect said members and hold them together frictionally in a separable relation.
2. A T square comprising a head having a recess, a blade, a raised portion having undercut converging edges secured to the said blade and adapted to enter the recess in the said head to separably join and frictionally hold the members together.
3. A T square comprising a head having a recess extending across the same and whose edges are converging and undercut, a blade and a raised portion secured to the surface of the said blade at one end thereof, the opposite edges of the said raised portion being converging and undercut and adapted to enter the said recess in the said head.
Signed by me this 21st day of March, 1908.
EDNIN B. ILES.
Witnesses:
GEO. T. PINGKNEY, BERTI-IA M. ALLEN.
US42330008A 1908-03-26 1908-03-26 T-square. Expired - Lifetime US903648A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US42330008A US903648A (en) 1908-03-26 1908-03-26 T-square.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US42330008A US903648A (en) 1908-03-26 1908-03-26 T-square.

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US903648A true US903648A (en) 1908-11-10

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2594193A (en) * 1947-10-06 1952-04-22 Mendes Bram Drafting instrument
US3103071A (en) * 1962-03-12 1963-09-10 Gregory S Dolgorukov T-square
US4334364A (en) * 1980-01-24 1982-06-15 Eberhard Faber, Inc. Adjustable straight edged device for use with drafting board
US5020233A (en) * 1990-03-14 1991-06-04 Syken Jeffrey M Measuring instrument
US5433518A (en) * 1993-11-26 1995-07-18 Rubbermaid Incorporated Drawer assembly and method therefor
US5624037A (en) * 1995-07-12 1997-04-29 Rubbermaid Office Products Inc. Collapsible letter tray kit
US20100018003A1 (en) * 2008-07-28 2010-01-28 Swartz Caroline Door stop assembly having an interchangeable decorative head piece

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2594193A (en) * 1947-10-06 1952-04-22 Mendes Bram Drafting instrument
US3103071A (en) * 1962-03-12 1963-09-10 Gregory S Dolgorukov T-square
US4334364A (en) * 1980-01-24 1982-06-15 Eberhard Faber, Inc. Adjustable straight edged device for use with drafting board
US5020233A (en) * 1990-03-14 1991-06-04 Syken Jeffrey M Measuring instrument
US5433518A (en) * 1993-11-26 1995-07-18 Rubbermaid Incorporated Drawer assembly and method therefor
US5624037A (en) * 1995-07-12 1997-04-29 Rubbermaid Office Products Inc. Collapsible letter tray kit
US20100018003A1 (en) * 2008-07-28 2010-01-28 Swartz Caroline Door stop assembly having an interchangeable decorative head piece

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