AN IMPROVEMENT OR IMPROVEMENTS IN THE MANUFACTURE OF BUTT HINGES."
Year: 1882

page_text: LETTERS PATENT to James Dyer of Birmingham in the County of Warwick
Machinist for an Invention of "AN IMPROVEMENT OR IMPROVEMENTS IN THE
MANUFACTURE OF BUTT HINGES."
PROVISIONAL SPECIFICATION left by the said James Dyer at the Office
of the Commissioners of Patents on the 30th October 1882.
JAMES DYER of Birmingham in the County of Warwick Machinist "AN
IMPROVEMENT OR IMPROVEMENTS IN THE MANUFACTURE OF BUTT HINGES."
My invention consists in manufacturing butt hinges from sheet metal by the
process or combination of processes hereinafter described whereby the knuckles of
the hinge are so formed and strengthened that their opening out or bursting when
strain is put upon the joint pin of the hinge is prevented.
In making the flap of a butt hinge according to my invention I proceed
essentially as follows:-
I cut out from sheet brass or other ductile metal or alloy an oblong blank having
a length somewhat more than double the breadth of the flap to be made. I pier.e
this blank near one end so as to leave the necessary pieces from which the knuckles
are to be made. These knuckle pieces divile the blank into two unequal parts
that part of the blank situated on one side of the knuckle pieces having a length
equal to about half the breadth of the flap and the part of the blank ou the other
side of the knuckle pieces having a length equal to the breadth of the flap plus one
half of the said tlap.
By means of shaping tools the knuckle pieces are bent into a semicircular figure
and the metal at the short side and about an equal portion at the long side of the
blank are raised at right angles to the other or middle portion of the blank. By
further shaping and bending operations the knuckles are bent into a nearly circular
figure and the raised parts at the opposite sides of the flap of the hinge are
gradually folded and closed upon the inner face of the flap the edges of the folded
or closed parts meeting across the middle of the said Hap. There is thus produced
a hinge flap having closed or nearly closed knuckles which are strengthened by the
prolongation of the metal on the innerside of the flap the flap having double the
thickness of the metal of the blank from which it was made. The screw holes are
mad through the double parts of the flap so that the said parts are securely bound
together when the hinge is fixed for use. The flaps thus inade are jointed together
in the ordinary way.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said James Dyer in the Great Seal Patent Office on the 24th April
1883.
JAMES DYER of Birmingham in the County of Warwick, Machinist
IMPROVEMENT OR IMPROVEMENTS IN THE MANUFACTURE OF BUTT HINGES.'
"
" AN
My invention consists in manufacturing butt hinges from sheet metal by the
process or combination of processes hereinafter described, whereby the knuckles of
the hinge are so formed and strengthened that their opening out or bursting when
strain is put upon the joint pin of the hinge is prevented.
In making the flap of a butt hinge according to my invention I proceed
essentially as follows.
I cut out from sheet brass or other ductile metal or alloy, an oblong blank
having a length somewhat more than double the breadth of the flap to be made.
1 pierce this blank near one end so as to leave the necessary pieces from which the
knuckles are to be made. These knuckle pieces divide the blank into two unequal
parts, that part of the blank situated on one side of the knuckle pieces having a
length equal to about half the breadth of the finp and the part of the blank on
the other side of the knuckle pieces having a length equal to the breadth of the
Hap, plus one half of the said flap.
By means of shaping tools the knuckle pieces are hent into a semi circular figure
and the metal at the short side and about an equal portion at the long side of the
blank are raised at right angles to the other or middle portion of the blank. By
further shaping and bending operations-the-knuckles.are bent into a nearly circular
figure and the raised parts at the opposite sides of the flap of the hinge are
gradually folded and closed upon the inner face of the flap, the edges of the folded
or closed parts meeting across the middle of the said flap. There is thus produced
a hinge flap having closed or nearly closed knuckles which are strengthened by the
prolongation of the metal on the inner side of the flap the flap having double the
thickness of the metal of the blank from which it was made. The screw holes are
made through the double parts of the flap so that the said parts are securely bound
together when the hinge is fixed for use. The flaps thus made are jointed together
in the ordinary way.
I will now proceed to describe with reference to the accompanying Drawing the
manner in which my invention is to be performed.
Figure 1 represents in plan and edge view the oblong sheet metal perforated
blank from which I manufacture according to my invention the flaps of butt
hinges.
The length of the blank, that is, the distance from x to y is somewhat more than
double the breadth of the flap to be made. The said blank is perforated and cut
away at a, a, a so as to leave the necessary pieces b, b, b from which the knuckles
are to be made. The sheet metal blank has also at one edge, the ears or dovetail
pieces d, and are on the opposite edge corresponding recesses c, c for receiving the
said ears or dovetail pieces d, d. The said parts c, c and d, d are for the purpose of
preventing the folded blank from opening or separating at its junction as
hereinafter explained.
The knuckle pieces b, b, b divide the blank into two unequal portions c, f. The
part has a length a little greater than one half of the breadth of the flap and the
part e on the other side of the knuckle pieces has a length equal to the breadth of
the flap, plus nearly one half of the flap, the said parts e and f being connected
together by the knuckle pieces b. b. b..
The blank Figure 1 is bent by the action of shaping tools into the form
represented in Figure 2, that is, the knuckle pieces 6 are bent into the semi-circular
figure shown at g and the sides ef of the blank are bent at right angles to one
another and a portion of the long side e is also bent at right angles to that side as

page_text: seen at e². The form which the partly made flap now assumes is best seen in the
end elevation of Figure 2. By further shaping and bending operations the
knuckles aro completely fashioned the sidef folded upon the inner face of the
side e and the part e at the same time folded upon the side e, the edges of
the closed or folded parts meeting across the middle of the flap as represented in
the finished flap shown in Figure 3 and the end elevation of the same, drawn to a
larger scale in Figure 4, in which Figures 3 and 4 the finished knuckles are
marked and the other parts are marked with the same letters of reference as
corresponding parts in Figures 1 and 2.
By an examination of the said Figures 3 and 4 the manner in which the knuckle
parts of the partly shaped flap Figure 2 are completed and the side parts folded
upon one another will be readily understood. A hinge flap thus produced has double
the thickness of metal of the blank from which it is inade. It has also closed or
nearly closed knuckles which are strengthened by the prolongation of the side f of
the blank upon the inner face of the side e.
In order to prevent the opening or separating of the folded parts e², ƒ at their
junction when strain is put upon the flap in the plane of the said flap, the ears or
dovetail parts d, d at the edge of one side of the blank are engaged by the folding
operation in the corresponding recesses c, c in the edge of the other side as
represented. The binding together of the doubled or folded parts is also effected
by the fastening screws the holes for which are made in the line of junction of the
folded parts so that when the flap is fixed for use the folded parts are held together
by the fastening screws.
The rounded edges of the flaps are made square by planing.
Figure 5 represents in upper and underside, cross section and end elevation a
finished hinge made by jointing together in the ordinary way two flaps made
according to my invention.
Figure 6 represents the finished hinge drawn to a larger scale. The cross section
of Figure 5 is taken through the dovetailed parts of the flaps and the cross section
of Figure 6 is taken between the screw holes and the dovetailed parts.
Figure 7 represents a finished hinge made according to my invention in which
the heads of the dovetailed parts and the recesses in which they engage are made
angular instead of curved.
Having now described the nature of my invention and the manner in which
the same is to be performed I wish it to be understood that I claim as my
invention;-
The improvement or improvements in the manufacture of butt hinges herein-
before described and illustrated in the accompanying Drawing; that is to say,
making the flaps of the said butt hinges from sheet metal by the process or com-
bination of processes substantially as hereinbefore described and illustrated,
whereby the knuckles of the hinge are so formed and strengthened that their
opening out or bursting when strain is put upon the joint pin of the hinge is
prevented.
In Witness whereof I the said James Dyer have hereunto set my hand and
seal this nineteenth day of April in the year of our Lord one thousand
night hun th
Witness,
RICHARD SK ERRETT
37 Temple Street
Birmingham.
JAMES DYER (L.S.)