IMPROVEMENTS IN BUTT HINGES
Year: 1878

page_text: LETTERS PATENT to Charles Louis Boyce, of Birmingham, in the County of
Warwick, Manufacturer, for the Invention of "IMPROVEMENTS IN BUTT
HINGES"
PROVISIONAL SPECIFICATION left by the said Charles Louis Boyce at the
Office of the Commissioners of Patents on the 28th September 1878.
CHARLES LOUIS BOYCE, of Birmingham, in the County of Warwick, Manufac-
turer. "IMPROVEMENTS IN BUTT HINGES."
My Invention consists of the improvements herein-after described in stamped
butt hinges, that is, hinges made from sheet brass or other sheet metal by cutting
out and stamping processes.
The objects of my said Invention are to strengthen the knuckles of the hinge and
to prevent the said knuckles from opening out when excessive strain is put upon
them. These objects I effect by locking or binding the unsupported side of each
knuckle to its flap in the following manner :-I cut from sheet brass or other sheet
metal in the ordinary way flap blanks of the usual shape, excepting that the middle
of the end of each of the projecting pieces of the blank from which the knuckles are
to be made is provided with a small tongue, and the middle of each knuckle piece
of the blank, and in a line with the inner edge of the flap part of the blank, is
furnished with a rectangular piercing of a size proper for the tongue on the end of
the knuckle piece to pass through.
I take a flap blank of this kind, and by a series of bending or coiling processes
effected by press tools in the usual way, I give to each knuckle piece a tubular
form, so as to convert it into a knuckle.

page_text: By this bending or coiling up of the knuckle pieces the small tongues on their free
ends are brought opposite and made to pass through the rectangular piercings near
the inner edge of the flap, the said tongues projecting from the back of the flap.
By rivetting the projecting parts of the tongues on the back of the flap, the
unsupported or open side of each knuckle is locked or bound very firmly to its flap.
By this locking or binding of the knuckles-to the flap increased strength is given to
them, and they are prevented from opening out from the flap when excessive strain`
is put upon them.
The flaps of the hinge thus constructed are engaged and jointed together and
finished in the ordinary way of manufacturing stamped butt hinges.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
.
the said Charles Louis Boyce in the Great Seal Patent Office on the 21st
March 1879.
CHARLES LOUIS BOYCE, of Birmingham, in the County of Warwick, Manufac-
turer. "IMPROVEMENTS IN BUTT HINGES."
My Invention consists of the improvements herein-after described in stamped
butt hinges, that is, hinges made from sheet brass or other sheet metal by cutting
out and stamping processes.
The objects of my said Invention are to strengthen the knuckles of the hinge and
to prevent the said knuckles from opening out when excessive strain is put upon
them. These objects I effect by locking or binding the unsupported side of each
knuckle to its flap in the following manner:-I cut from sheet brass or other sheet.
metal in the ordinary way flap blanks of the usual shape, excepting that the middle
of the end of each of the projecting pieces of the blank from which the knuckles are
to be made is provided with a small tongue, and the middle of each knuckle piece of
the blank, and in a line with the inner edge of the flap part of the blank, is fur-
nished with a rectangular piercing of a size proper for the tongue on the end of the
knuckle piece to pass through.
I take a flap blank of this kind, and by a series of bending or coiling processes
effected by press tools in the usual way, I give to each knuckle piece a tubular
form, so as to convert it into a knuckle. By this bending or coiling up of the
knuckle pieces the small tongues on their ends are brought opposite and made to
pass through the rectangular piercings near the inner edge of the flap, the said
tongues projecting from the back of the flap. By rivetting the projecting parts of
the tongues on the back of the flap the unsupported or open side of each knuckle is
locked or bound very firmly to its flap. By this locking or binding of the knuckles
to the flap increased strength is given to them, and they are prevented from opening
out from the flap when excessive strain is put upon them.
The flaps of the hinge thus constructed are engaged and jointed together and
finished in the ordinary way of manufacturing stamped butt hinges.
I will now proceed to describe, with reference to the accompanying Drawing, the
manner in which my Invention may be performed.
Figures 1 and 2 represent in elevation and edge view the two
a stamped butt hinge is to be made according to my Invention.
parts of the blanks, and b, b, are the knuckle pieces of the same.
the end of each knuckle piece b is a small tongue c.
blanks from which
a, a, are the flap
On the middle of
By means of piercing tools worked in a press I pierce the middle of each knuckle
piece, and in a line with the inner edge of the flap part a with a rectangular piercing.
of a size proper for the tongue c on the end of the knuckle piece b to pass through,
as represented in elevation and section in Figures 3 and 4, where the rectangular
piercings are marked d, d.
I take the flap blanks represented in Figures 3 and 4, and bend by means of
press tools worked in a press the knuckle pieces b into the trough form represented
in elevation and section in Figures 5 and 6, and by subsequent bending or coiling
processes the said knuckle pieces are bent into a tubular form so as to convert them
into knuckles, and at the same time the small tongues c, c, on the ends of the
knuckle pieces are brought opposite and made to pass through the rectangular
piercings d, d, and project from the back of the flaps. Figure 7 represents in eleva-
tion and section a nearly finished hinge, and exhibits the manner in which the
knuckle pieces are bent or coiled up into the knuckles, and the tongues c, c, passed
through the piercings d, d, in the flaps. It must, however, be understood that the
two flaps of the hinge are operated upon separately, so as to pass the tongues c, c,
through the piercings d, d, and their knuckles are afterwards engaged together.

page_text: The tongues c, c, of the knuckle pieces b, b, having been brought into the position
represented in Figure 7 the projecting ends of the said tongues are rivetted on the
back of the flap, as shown in the finished hinge represented in elevation and section
in Figure 8. The knuckles of the two flaps are now engaged together, and a joint
pin passed through them and rivetted in the ordinary manner.
It will be seen by an examination of the Drawing that by the rivetting of the
tongues c, c, on the backs of the flaps the unsupported or open side of the knuckles
b, b, are locked or bound very firmly to their flaps, and the said knuckles are
prevented from opening out from the flaps when excessive strain is put upon
them.
Having now described the nature of my Invention, and the manner in which tho
same is to be performed, I wish it to be understood that I claim as my Invention
the improvements in butt hinges herein-before described, and illustrated in the
accompanying Drawing, that is to say, locking or binding the unsupported or open
sides of the knuckles of stamped butt hinges to their flaps by means of small tongues
on the ends of the said knuckles, which tongues are passed through and rivetted to
the said flaps, substantially as described and illustrated, whereby the said knuckles
are strengthened and prevented from opening out when excessive strain is put upon
them.
In witness whereof, I, the said Charles Louis Boyce, have hereunto set my.
hand and seal, this Seventeenth day of March, in the year of our Lord One
thousand eight hundred and seventy-nine.
Witness,
RICHARD SKERRETT,
Clerk to George Shaw,
Birmingham.
CHARLES LOUIS BOYCE. (L.S.) ·