Improvements in and connected with Drawing Squares.
Year: 1889

page_text: Date of Application, 1st Mar., 1889
Complete Specification Left, 26th Nov., 1889-Accepted, 28th Dec., 1889
PROVISIONAL SPECIFICATION.
Improvements in and connected with Drawing Squares.
GEORGE CHALLENGER Engineer 56 St. Georges Terrace Swansea WILLIAM
STANWAY BOOTH Engineer 26 Freehold Street Swansea County of Glamorgan do
hereby declare the nature of this invention to be as follows:-
This Invention relates to an arrangement of Squares for Draughtsmen, Artists and
others, its object being to enable drawings and sketches to be made with facility in
a book or on sheets of paper, without the necessity of securing the paper to the
drawing board, also to enable drawings to be made on a black or other board
regardless of the edges of the board being true.
In carrying out this Invention, in order to effect these objects we purpose when
using the Instrument for drawing in a book, or on separate sheets, to make one or
more Clips or Cramps to grip the leaves or sheets on which the drawing has to be
made, the said Clips or Cramps to live guides formed on them for receiving a rod,
the said rod forming the head or stock of a T square, to which the blade of the
square is firmly fixed, the rod being made to slide freely in the guides formed on
the Clips.
To the blade of the T square we fit other blades to act as set squares.
To enable the set squares to be fixed at any required angle we fit a protractor to
the blade of the T square to which we secure the set squares by a pin or adjusting
screw, the protractor and set squares being made to slide freely on the T square
blade.
For Engineers, Architects and Artists sketch and pocket books we purpose fixing
the Clips for griping the leaves to the cover of the book in such manner that the
book can be closed without r removing the Instrument.
In lieu of Clips or Cramps when the Instrument is used for making drawings on a
black or other board, or on paper placed on a board, the guides for the rod to slide
in may be formed on the top of drawing pins, screws or paper weights.
The method of using the Instrument in this case is to fix the pins, screws or
weights in the required position on the board, then place the rod forming the head
of the T square in the guides. The Instrument is then used in the same manner as
described with the Clips.
Instead of the rod forming the head of the T square, being made to slide in the
guides it may be made a fixture in them, and the stock or head of the blade made to
slide freely over the rod.
Dated this 28th day of February 1889.
GEORGE CHALLENGER.
WILLIAM STANWAY BOOTH.
COMPLETE SPECIFICATION.
Improvements in and connected with Drawing Squares.
GEORGE CHALLENGER Engineer 56 St. Georges Terrace and WILLIAM STANWAY
BOOTH Engineer 26 Freehold Street both of Swansea County of Glamorgan do
hereby declare the nature of this invention and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:
This Invention relates to an arrangement of Squares for Draughtsmen, Artists,
and others, and its object being, to enable drawings, or sketches, to be made with

page_text: facility, in a book or on sheets of paper without the necessity of pining the sheets to
a drawing board, also, to enable drawings to be made on a black or other board,
regardless of the edges of the board being true.
In carrying out this Invention, and in order that the said Invention may be fully
understood, we now proceed more particularly to describe the same, and for that
purpose shall refer to the several Figures on the explanatory sheet of Drawings, on
which like Figures indicate corresponding parts.
Figure 1 represents a side view of our improved square, Figure (2) a plan of
same, with the rods C. ( forming the stock of the square, closed,
Figure 3 a plan, showing the rods C. C. open ready for use, Figure 4 a side view
of the T square, showing one method of fastening the rods C. C. to the blade B.
On the top part of Clip A, we form Ears or Lugs A1 A' with holes or slots formed
in them, the said holes or slots forming guides for the rods C. C. to slide in, the
rods C. C. forming the stock of the T square blade B. The top part, A of the Clip,
is connected to the base plate A2 by a pin joint with a spiral or other spring (not
shown) placed between them, for the purpose of closing the clip.
At one end of the blade B, we lit à metal clip A³, to which the rods C. C. are
fastened, and griped in the required position by the thumb-screw D. In fixing the
sheet, to be drawn upon, the blade B is turned over to the left hand, the sheet is then
placed between the Jaws of the Clip A. The blade B being then turned back onto the
top of the Sheet, the Instrument is now ready for use.
Figures 5 and 6 is an elevation and plan of another form of Clip and T square.
In this case, in lieu of the Ears or Lugs A' A' as shown on Figures 1, 2 and 3 for
the stock of the T square to slide in, we fit on the Clip A, a rod, or tube C¹ C¹ to
form a guide for the stock B₁ of the T square B, the other end of the clip A passing
through a slot in the spring C, and acting as a lever to open and close the Clip;
B is the blade of a set square, secured to the stock F2 by the adjusting screw D,
a graduated scale F' being formed on the stock for the purpose of fixing the
blade B at. any required angle, a grove F being cut in the blade B for the
stock F to slide.freely in.. Figure 7 is a section of blade B showing grove F.
When the Instrument is made, to be used in connection with a sketch, or other
hook, we screw, rivet or otherwise fasten the plate D to the cover of the book,
the plate D being made to form a socket, into which the tail end A2 of the spring C
is fixed, thus enabling the Instrument, to be removed if required, and fixed to the
cover of another book. But when the Instrument is made to be fixed on to a mill-
board, or other back E, the plate D¹ is not required, the tail end A² of the spring C²
being rivetted or otherwise fastened to the back E, or as is shown in Figures 1, 2
and the base plate A2, of the Clip A, is rivetted, or otherwise fastened to the mill-
board or other back E.
Or the Instrument may be used independently of any back board, by placing it on
a table, or other flat surface, and fixing the sheet to be drawn upon, between the
Jaws of the Clip A, or it can be fixed to the leaves of a copy, or exercise book for
the use of students and others.
The Figures 8, 9 and 10, show the guides A¹ for the rods C. C. formed on the top
of drawing pins: Figure 11, shows the guides A¹ formed, on the top of screws.
This latter arrangement of guides is more specially adapted for the use of the square
in connection with black, or other boards, or for making drawings on a floor, such
as a moudling loft. In large squares for this purpose, we fit a metal clip A³,
and rods C. C. to each end of the blade B, to ensure greater accuracy of travel.
On the accompanying sheet of drawings, the guide rods C. C. are shown solid, but
they may be made hollow, or in lieu of them being fixed side by side as shown, they
may be made telescopic i.e., one to slide in the other, for the purpose of closing when
not in use.
We dont confine ourselves to the particular form of clip shown as it is obvious, that.
several forms of Clips may be made with Ears, Lugs, or guides formed on them, for
guiding the stock of the T square.

page_text: Having now described the nature of our said Invention, and in what manner
the same, is to be performed, we declare that what we claim is,
First. Ears, Lugs or guides formed on Drawings pins, or Paper Clips, to be used,
in connection with a drawing square, substantially, and for the purpose herein-before
described and illustrated by our Drawings.
Second. The application, and use of rods or tubes, for the stock of Drawing
Squares, substantially, and for the purpose as herein-before described, and illustrated
by our Drawings.
Third. The application and use of the Instrument, in connection with a sketch,
or other book, substantially, and for the purpose as herein-before described, and
illustrated.
Fourth. The general combination, and arrangement of parts, constituting a
Drawing Instrument, arranged to operate together, substantially, in the manner,
and for the purpose herein-before described, and illustrated by our Drawings.
Dated this 25th day of November 1889.
GEORGE CHALLENGER.
WILLIAM STANWAY BOOTH.