Improvements in the Manufacture of Butt Hinges.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Butt Hinges.
We, TONKS. LIMITED, of Moseley Street, Birminghain, in the County of War-
wick, Manufacturers, and WALTER REVILL, of No. 4, St. John's Villas, Ladypool
Road, Moseley, Birmingham, aforesaid, Tube Drawer, do hereby declare the
nature of this invention to be as follows:-
J
The said invention consists in manufacturing butt hinges by the process or
combination of processes hereinafter described whereby butt hinges are produced
consisting of an iron or steel foundation and a covering or casing of brass or
copper, the cased butt hinges being of great strength and resembling in' appear-
ance solid brass or copper butt hinges, but of greater strength than ordinary
brass or copper butt hinges.
In manufacturing cased brass butt hinges according to this invention 'we
proceed as follows:-
We take a cylindrical tube of brass from which the casing or covering part
of the hinge is to be made and by a series of drawing operations effected in dies
fixed in a draw bench, we flatten the said casing tube into a long strip having
the general figure in cross section of the flap of a butt hinge but hollow or
tubular; that is, the parallel sides of the flap casing strip are separated from
one another and along one edge of the strip is a tubular beading from which
the cased knuckles of the hinge are to be made, the opposite edge of the strip
being rounded.
We also take a long thin strip of iron or steel from which the foundation of
the hinge is to be made and by similar drawing operations we give to it nearly
the same figure in cross section as that which has been given to the casing strip,
the said foundation strip having such a thickness and shape that it can be readily
introduced into the hollow or tubular casing strip.
The long iron or steel foundation strip having been introduced into the brass
casing strip the combined strips are together drawn through dies. By this
operation the brass casing strip is drawn closely upon the iron or steel foundation
strip so as to fix the former upon the latter, the flat parts of the compound or
cased strip having a foundation of iron or steel of double thickness.
The long compound strip, consisting of a foundation of iron or steel covered
on all sides by a strip of brass, is cut transversely into flap blanks of the required
length and the knuckles cut from the beaded edge of the blanks. The flaps are
jointed together and finished in the ordinary way of making butt hinges. The
butt hinges thus made are brass cased and are of great strength.
Dated this Twenty-eighth day of March 1898.
W. T. WHITEMAN,
Agent for the Applicants.

page_text: Improvements in the Manufacture of Butt Hinges.
We, TONKS LIMITED, of Moseley Street, Birmingham, in the County of War-
wick, Manufacturers, and WALTER REVILL, of No. 4, St. John's Villas, Ladypool
Road, Moseley, Birmingham, aforesaid, Tube Drawer, do hereby declare the
nature of the said invention and in what manner the same is to be performed to
be particularly described and ascertained in and by the following statement:-
The said invention consists in manufacturing butt hinges by the process or
combination of processes hereinafter described whereby butt hinges are produced
consisting of an iron or steel foundation and a covering or casing of brass or
copper, the cased butt hinges being of great strength and resembling in appear-
ance solid brass or copper butt hinges, but of greater strength than ordinary
brass or copper butt hinges..
In manufacturing cased brass butt hinges according to this invention we
proceed as follows:-
We take a cylindrical tube of brass from which the casing or covering part
of the hinge is to be made and by a series of drawing operations effected in dies
fixed in a draw bench, we flatten the said casing tube into a long strip having
the general figure in cross section of the flap of a butt hinge but hollow or
tubular; that is, the parallel sides of the flap casing strip are separated from
one another and along one edge of the strip is a tubular beading from which
the cased knuckles of the hinge are to be made, the opposite edge of the strip
being rounded.
We also take a long thin strip of iron or steel from which the foundation of
the hinge is to be made and by similar drawing operations we give to it nearly
the same figure in cross section as that which has been given to the casing strip,
the said foundation strip having such a thickness and shape that it can be readily
introduced into the hollow or tubular casing strip.
The long iron or steel foundation strip having been introduced into the brass
casing strip the combined strips are together drawn through dies. By this
operation the brass casing strip is drawn closely upon the iron or steel foundation
strip so as to fix the former upon the latter, the flat parts of the compound or
cased strip having a foundation of iron or steel of double thickness.
The long compound strip, consisting of a foundation of iron or steel covered
on all sides by a strip of brass, is cut transversely into flap blanks of the required
length and the knuckles cut from the beaded edge of the blanks. The flaps are
jointed together and finished in the ordinary way of making butt hinges. The
butt hinges thus made are brass cased and are of great strength.
We will now proceed to describe with reference to the accompanying drawings
the manner in which the said invention is to be performed.
Figure 1 represents in plan; Figure 2 in end elevation and Figure 3 in cross
section a cased butt hinge made according to this invention. The said hinge
consists of an iron or steel foundation marked a and a covering or casing of
brass or copper marked b. In consequence of the iron or steel foundation a the
cased hinge is of great strength and resembles in appearance a solid brass or
copper hinge the whole of the exposed edges of the iron or steel foundation being
covered and concealed by the brass or copper casing or covering. It will be
seen by an examination of Figures 2 and 3 that the flap parts of the iron or
steel foundation where they pass into the knuckle part of the said foundation
consist of folded strips of double thickness of metal, but the said flap parts of
the iron or steel foundation may consist of a single or unfolded strip of iron or
steel as hereinafter described.

page_text: in manufacturing the cased butt hinge Figures 1, 2 and 3 we take a cylindrical
tube of brass or copper, either solid drawn or brazed, as represented in Figure 4
and by a series of drawing operations (say two or more) effected in dies fixed
in a draw bench we form from the cylindrical tube Figure 4 a long casing hollow
strip of the kind represented in Figure 5, that is to say, the cylindrical tube is
flattened and has in cross section the general figure of the flap of a butt hinge,
but is hollow or tubular the parallel sides of the flap part of the casing strip
being separated from one another, one edge having a tubular beading and the
other edge being rounded. From the parallel side parts of the casing strip
Figure 5 the flap part of the foundation of the hinge is cased and from the
tubular beading of the casing strip the knuckle part of the foundation is cased.
In making the iron or steel foundation of the hinge we take a long strip of
sheet iron or steel of the kind represented in Figure 6 and having doubled or
folded it along its middle we subject it to one or more drawing operations in a
die or dies fixed in a draw bench so as to give the said doubled strip the form
represented in Figure 7; that is, the said iron or steel strip has nearly the same
figure in cross section as that of the casing strip Figure 5, but the flap parts of
the said foundation strip are nearly in contact, the said foundation strip having
such a thickness and shape that it can be readily introduced into the hollow or
tubular casing trip Figure 5.
In converting the long casing strip Figure 5 and the long foundation strip
Figure 7 into a butt hinge the foundation strip Figure 7 is introduced into the
hollow casing strip Figure 5 as represented in side elevation in Figure 8, and
cross section in Figure 9 and the combined strips are drawn together through
one or more dies so as to draw the covering strip closely upon the iron or steel
foundation strip and thereby fix the former upon the latter.
By the last described drawing operation or operations a long compound strip
of the kind represented in elevation in Figure 10 and cross section in Figure 11
is produced the said compound strip consisting of a foundation of iron or steel a
(the flap part of which is of double thickness of metal) covered on all sides by
a casing or covering strip of brass or copper b. The compound strip Figures 10
and 11 is cut transversely at the dotted lines d, d Figure 10 into flap blanks and
the knuckles cut from the beaded edge of the blanks as represented in Figure 12.
The cased flaps thus made are then finished and pinned or jointed together in the.
ordinary way so as to produce cased butt hinges of the kind represented in
Figures 1, 2 and 3.
Figure 13 represents in plan and Figure 14 in end elevation a butt hinge
made as herein before described excepting that the flap part of the iron or steel
foundation consists of a single thickness of metal, that is, the metal of the flap
part of the foundation is unfolded; Figure 15 represents the hollow or tubular
casing strip of brass or copper; Figure 16 represents the foundation strip of
iron or steel having a single thickness of metal at the flap part; Figures 17 and 18
represent in side elevation and cross section the two strips fitted together prior
to the final drawing operation and Figure 19 represents the compound strip after
the final drawing operation and Figure 20 represents one of the hinge flaps cut
from the compound strip Figure 19.
The method last described is particularly applicable to the manufacture of
inges of small size but we do not limit ourselves to the manufacture from com-
bound strips of the kind represented in Figure 19 of any particular dimensions
f butt hinges; neither do we limit ourselves to the thickness of the iron or
teel foundation strip which we case or cover with brass or copper.
Although we generally case or cover the iron or steel foundation strip with
rass or copper as described yet the said steel or iron foundation strip may be
ased or covered with other hard ductile metals or alloys capable of being drawn
fter the manner of brass or copper such for example as bronze, German silver,
nd aluminium.
As the drawing tools which we employ in carrying the said invention into

page_text: effect resemble in all essential respects drawing tools commonly employed for
similar purposes we have not thought it necessary either to describe or represent
them.
},
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that we
claim as the said invention of "Improvements in the manufacture of butt
hinges";
Making butt hinges of a foundation of iron or steel and a casing or covering
of brass copper or other hard and ductile metal or alloy drawn upon the said
iron or steel foundation the process of manufacture being conducted substantially
in the ways herein before described and illustrated in the accompanying drawings.
Dated the Twelfth day of December 1898.
TONKS LIMITED,
W. H. TONKS,
P. TONKS,
}
Directors.
W. H. TONKS, JR.,
WALTER REVILL.
Secretary.