Improvements in Drawing Boards and Tee Squares.
Year: 1898

page_text: Improvements in Drawing Boards and Tee Squares.
We, WILLIAM FORD STANLEY, of 4 & 5, Great Turnstile, Holborn, in the County
of London, Optician, and ROBERT WILLIAM FIELDWICK, of 1, Sloane Mansions,
Sloane Gardens, Sloane Square, in the County of London, Engineer, do hereby
declare the nature of this invention to be as follows:-
:-
The object of our invention is to provide a more accurate working edge to
drawing boards and also to the stock of the tee square to be used with same.
And to carry our invention into effect we construct our improved drawing
board and tee square as follows.
The drawing board may be of any of the usual forms but instead of the
ordinary ebony edge a deep groove is cut along the edge and into this a steel
or other suitable metal bar is fitted so that its edge which is machined true
projects slightly beyond the edge of the board this steel bar is preferably held
in position by one or two screws near the centre which pass through tapped holes
in the steel bar from the back of the board and short strips of rubber or other
suitable material are placed under each end to prevent any shake through
shrinkage. This method allows of expansion and contraction of the board.
The machined edge of this steel bar forms the working edge of the board.
The working edge of the tee square has also a metal bar let in and this is
preferably gun metal or brass which works more smoothly on steel than a similar
metal this edge is preferably screwed in a rebated recess cut on the under side
of the working edge of the stock and arranged to hear or work upon the steel
bar of the board.
Improvements in Drawing Boards and Tee Squares.
We, WILLIAM FORD STANLEY, of 4 and 5, Great Turnstile, Holborn, in the County
of London, Optician, and ROBERT WILLIAM FIELDWICK, of 1, Sloane Mansions,
Sloane Gardens, Sloane Square, in the County of London, Engineer, 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:
The object of our invention is to provide a more accurate working edge to
drawing boards and also to the stock of the tee square to be used with same.

page_text: And to carry our invention into effect we construct our improved drawing
board and tee square as follows reference being made to the accompanying
drawings.
The drawing board A Fig. 1 shown in elevation may be of any of the usual
forms but instead of the ordinary ebony edge a deep groove is cut along the
edge and into this a steel or other suitable metal bar B is fitted so that its edge
which is machined true projects slightly beyond the edge of the board this steel
bar is preferably held in position by one or two screws near the centre or it may
have a screw at one end and a stud passing through a slot at the other end.
The screws pass through tapped holes in the steel bar from the back and short
strips of rubber or other suitable material are placed under each end to prevent
any shake through shrinkage of the board this method allows of expansion and
contraction of the board.
The machined edge of this steel bar forms the working edge of the board.
The working edge of the tee square C has also a metal bar D let in and this
is preferably gun metal or brass which works more smoothly on steel than a
similar metal this edge is preferably screwed in a rebated recess cut on the
underside of the working edge of the stock and arranged to bear or work upon
the steel bar of the board.
Fig. 2 is a perspective view of the board and square.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
1. The use in combination with drawing boards of a metal bar having a true
working edge so inserted that the metal working edge projects slightly beyond
or outside the ordinary working edge of the board.
2. The use in combination with tee squares of a metal bar having a true work-
ing edge attached to the stock of the square so that the metal working edge
projects slightly beyond or outside the ordinary working edge of the stock.
3. The improved drawing board and tee square substantially as herein described
and illustrated in the accompanying drawings.
Deted this 28th dow of Tule 1800
H. T. TALLACK,
Agent for Applicants,
10, Great Turnstile, Holborn, London, W.C.
H. T. TALLACK,
Agent for Applicants,
10, Great Turnstile, Holborn, London, W.C.