An Improved Combination Drawing Instrument.
Year: 1890

page_text: Date of Application, 8th Nov., 1890
Complete Specification Loft, 5th Aug 1901 Accepted, 8th Doc.
1801
PROVISIONAL SPECIFICATION.
An Improved Combination Drawing Instrument.
I WILLIAM HENRY BROWN of Bellmay Cottage Greville Street Southville
Bristol Joiner do hereby declare the nature of this invention to be as follows:-
An instrument to combine the offices of tee square, set square, protractor, compass
with adjustable blade and adjustable sliding set square.
It is composed of a stock with centrerivet and screw, blade with point at back
showing over a protractor & by this means enabling the draughtsman to set the
blade to any angle, the blade being grooved and a portion plated with brass or
suitable metal, in which an adjustable metal or vulcanite set square slides and
which is capable of being set to any angle off the blade of the set square by means
of indications engraved thereon, being held in position when set by thumb screws.
In the blade is set a moveable pencil also capable of adjustment by sliding in groove
by means of which all necessary curves and distances may be set out.
Dated this Seventh day of November 1890.
W. H. BROWN.
COMPLETE SPECIFICATION.
An Improved Combination Drawing Instrument.
I WILLIAM HENRY BROWN of 101 Greville Road in the City of Bristol Joiner
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 consists of an improved combination drawing instrument designed
more particularly for use by architects and draughtsmen.
It consists of tee square the blade of which is furnished with a pointer, set over
a protractor fixed in the stock, and also fitted with screws by means of which the
blade can be set to any required angle.
This blade also contains grooves for
movable set square.
The set square is made of metal vulcanite or other suitable material & is provided
with a groove to receive sliding pencil carrier. The set-square slides to the full
length of the blade of the tee square in grooves prepared to receive the same & by
bringing the required indication engraved on the set square to cut the edge of the
blade of the tee square any angle may be set off. The set square is guided and
kept in position on the tee square by the screw slides B B.
The pencil carrier on the set square fits the latter for use as a compass to describe
segments of circles, set out distances etc. and the set square is used as a compass by
releasing one screw B the pencil carrier then acts as, and in lieu of, one leg, and
the remaining screw B acts as the other leg.
Fig. 1 shows view of portion of stock with protractor, also portion of blade of
tee square with pointer over protractor and screws for holding same in position
after setting to the required angle.
Fig. 2 shows section through Fig. 1.
Fig. 3 shows plan of set square with portion of tee square also adjustable pencil
carrier A and screws B. B. for securing set square in position on blade of tee square
also necessary scales for setting off' distances."
Fig. 4 shows section through Fig. 3.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what
I claim is :-
1. A tee square with adjustable blade fitted with pointer over a protractor set in
stock capable of being adjusted to any angle the blade of tec square is held in
position on stock by a screw and contains grooves for set square to slide in.
2. A. set square capable of being adjusted to any angle from blade of tee square
by means of required indication being brought to cut the edge of the tee square.
The set square is provided with necessary scales for use with adjustable pencil
carrier in setting off distances and is held in position in grooves in blade of tee
square by screws.
3. Adjustable peucil carrier to slide in groove provided in set square for this
purpose.
W. H. BROWN,
Applicant.