Iм- FROVEMENTS IN CONSTRUCTION OF TRUE SURFACES AND EDGES APPLICABLE TO DRAWING PURPOSES
Year: 1870

page_text: LETTERS PATENT to William Ford Stanley, of 5, Great Turnstile,
Holborn, in the County of Middlesex, for the Invention of " Iм-
FROVEMENTS IN CONSTRUCTION OF TRUE SURFACES AND EDGES APPLICABLE TO
DRAWING PURPOSES."
Sealed the 27th January 1871, and dated the 15th August 1870.
PROVISIONAL SPECIFICATION left by the said William Ford Stanley
at the Office of the Commissioners of Patents, with his Petition,
on the 15th August 1870.
I, WILLIAM FORD STANLEY, of 5, Great Turnstile, Holborn, in the
County of Middlesex, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN CONSTRUCTION OF TRUE SURFACES AND EDGES APPLICABLE
TO DRAWING PURPOSES," to be as follows:-
For the construction of true surfaces and edges applicable to drawing
surfaces my Invention applies to surfaces and edges of wood, and
consists particularly in lining the interior of such surfaces or edges with
steel or other metal of such strength that the contractile force of the
fibre of wood will be resisted.
First. For surfaces used generally as drawing boards the construction
is as follows:-The drawing board has one or more holes bored from
"

page_text: edge to edge through the cross way of the grain, into each such hole a
rod or tube of metal is inserted, the ends of the hole being afterwards
covered with a plug of the same material as that of the board, or the
exact equivalent may be effected by ploughing a deep groove in each
end of the board and inserting therein a bar of metal of less width than
the depth of the groove, the upper part of the groove being afterwards
filled in with wood to the edge surface.
For portable drawing boards the construction will be as follows:-The
board will be constructed of several pieces of wood of convenient width
fitted and dowelled or matched together. The rods in this instance will
traverse the centre of the interior as before; but instead of having their
ends inserted they will be constructed as bolts, having a head at one end
and a nut at the other, so as thereby to be able to draw the several
pieces of wood which form the board tightly together; in this con-
struction the holes through the wood will be sometimes lined with brass
tube in short lengths equal to the width of each separate piece of
portable board.
Second. For straight-edges a piece or pieces of metal will be inserted
along the centre of the interior of a slip of wood..
The principle of this Invention being to make surfaces or edges of
wood remain true by the insertion in the interior of steel or other metal
of sufficient strength to overcome the various contractile forces of its
fibre, in the manner described.
The application, of the Invention is claimed for like construction
annlied to wood surfaces generally
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Ford Stanley in the Great Seal Patent
Office on the 3rd February 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
FORD STANLEY, of 5, Great Turnstile, Holborn, in the County of Middle- 3
sex, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fifteenth day of August, in the year
of our Lord One thousand eight hundred and seventy, in the thirty-

page_text: :
fourth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William Ford Stanley, Her special
Licence that I, the said William: Ford Stanley, my executors, adminis-
trators, and assigns, or such others as I, the said William Ford Stanley,
my executors, administrators, and assigns, should at any time agree with,
and no others, from time to time and at all times thereafter during
the term therein expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and
Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN CONSTRUCTION OF, TRUE SURFACES AND EDGES APPLICABLE TO
DRAWING PURPOSES," upon the condition (amongst others) that I, the said
William Ford Stanley, my executors or administrators, by an instrument
in writing under my, or their, or one of their hands and seals, should
particularly describe and ascertain the nature of the said Invention, and
in what manner the same was to be performed, and cause the same
to be filed in the Great Seal Patent Office within six calendar months
next and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Ford Stanley, do hereby
declare the nature of my said Invention, and in what manner the same
is to be performed, to be particularly described and ascertained in and
by the following statement :-
-
For the construction of true surfaces and edges applicable to
mathematical drawing purposes my Invention relates particularly to
instruments externally made of wood, and consists particularly in lining
such surfaces or edges with steel or other metal of such strength that
the unequal contractile force of the fibre of the wood will be resisted.
The said metal in certain instances being brought through to the edge to
-form a working edge.
First. For surfaces which will be used generally as drawing boards
the construction is as follows:-The drawing board has one or more
holes (generally two) bored from edge to edge through the cross way of
the grain, into each such hole a rod or tube of metal is inserted, this
is shewn in section B of the accompanying Drawings, each end of
the hole will have a plug of the same material as that of the board glued
into it, or a plough groove will be made in each end of the board
sufficiently deep to take a bar of metal of required strength, and allow
the upper part of the groove to be afterwards filled in with wood to the
edge surface. This construction is shewn in section at A.

page_text: For portable drawing boards the board will be constructed of several
pieces of wood jointed together, the rods will traverse the interior as in
section B, and the rods of metal will form bolts with head and nut, as
shewn in plan B.
For the class of boards called panel boards the steel will be inserted 1
inside the edge framing, as shewn in section at C.
Second. For straight-edges a piece of metal will be inserted along the
centre of the interior of the wood, as shewn in section at D, E, F, and G;
H being the plan; I shews the straight-edge applied to form the ruling
edge of a tee square J to form the angle of a set square.
In this part of the Invention it is necessary to observe that slips of
metal have been previously inserted in the edges of wood to form
working edges; these strips have been made very narrow, also generally
wedge-shaped of less than inch wide, and have been pressed and glued
into the edge of the wood, the object being only to form a hard working
edge. Whereas in this Invention the metal is inserted not necessarily
at the edge but through the interior, the object being to keep the
straight-edge from warping, the metal surface being equal to about
three-fourths of the straight-edge surface.
Generally the principle of this Invention is claimed, which is to make
the surfaces and edges of wood remain true by the insertion of steel or
other metal of sufficient strength to overcome the various contractile
forces of its fibre; the manner is described and shewn in the Drawings
as applied only to drawing instruments.
The application of the Invention is also claimed for like construction:
applied to wood surfaces and edges for any purpose.
In witness whereof, I, the said William Ford Stanley, have hereunto
set my hand and scal, this Third day of February, in the year of
our Lord One thousand eight hundred and seventy-one.