T-Square. Page: 2 of 2
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UNITED STATES PATENT OFFICE.
JOSEPH W. ROWE, OF AUSTIN, TEXAS.
T-SQUARE.
SPECIFICATION forming part of Letters Patent No. 267,260, dated November 7, 1882.,
Application fled April21, 1882. (So modeL)
To all whom it may concern: D is a binding-screw by which to fasten the
Be itknown that I, JOSEPH WILLIAIRowE, tongue in the head B, and E is a rabbet which 40o
of Austin, in the county of Travis and State I make in the head to fit the edge of the board,
of Texas, have invented a new and Imnproved for keeping the tongue upright, said tongue
5 T8quare, of which the following isafull, clear, being too narrow to control the head.
and exact description. The scales may be printed any desired length.
Thisinventioneonesistsofthetongueor shaft on the tongue; but it will not be necessary to 45
of the T-sqnare, made of an equilateral scale, begin at the head, as a few inches therefrom
and fitted in the head so that it can be readily may be blank along the margin of the board
to taken out and shifted around on its longitudi- and the paper being drawn ilpon.
nal axis from side to side, in order that the Havingthus described my invention, what I
different scales of the different sides may be claim as new, and desire to secure by Letters 50
set to the work, so that the draftsman can set Patent, is-
his points directly therefrom without the use 1. The improved T-square having an equi-
,5 of thedividers, as will be hereinafter described, lateral scale for the tongue, and said tongue
Reference is to be had to the accompanying fitted adjustably in the head of the square,
drawings, forming part of this specification, in substantially as described. 55
which similar letters of reference indicatecor- 2. The combination of the tongue A, con-
responding parts in all the figures. structed in the form of a equilateral scale,
20 Figure 1 is a side elevation of my improved the head B, having a mortise corresponding to
T-square. Fig. 2 is a side elevation of the the form of the tongue, and the binding-screw
head of the square, and Fig. 3 is an cud ele- ), substantially as specified. 60
svtion of the scale to be employed for the 3. The combination of the tongue A, con-
tongue of the square, structed in the form of an equilateral scale,
23 A represents the tongue of tilhe square, which the head B, having a mortise corresponding to
I propose to make in the form of the common the form of the tongue, binding-screw D, and
equilateral triangular scale, with the usual or the brackets C, substantially as described. t5
any desired scales printed on the square; and 4. The combination of the tongue A, con-
B represents the head of the square, in which structed in the form of an equilateral scale,
30 1 propose to fit the tongue by an equilateral and theheadlB, having therabbet E, substan-
mortise through said head, corresponding to tially as specified.
the inform of the tongue, and also by the brack-
ets C on the back, so that the tongue can be JOSEPH WILLIAM ROWE.
readily taken out and shifted around from side
35 to side to present the different scales to the Witnesses:
work on the paper for taking the measures di- I. G. TAYLon,
lectly from the scale without the use of the JonN B. BRADFORD.
dividers.
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Rowe, Joseph William. T-Square., patent, November 7, 1882; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth170437/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.