Improvements in the Manufacture of Door and other Hinges.
Year: 1896

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Door and other Hinges.
We, TONKS LIMITED, of Moseley Street, Birmingham, in the County of
Warwick, Manufacturers and ARTHUR GEORGE TONKS, Director and Secretary
of Tonks Limited aforesaid, Manufacturer do hereby declare the nature of this
invention to be as follows:-
The said invention consists of the improvements hereinafter described on an
invention for which Letters Patent were granted to Tonks Limited and William
Nock on the 22nd day of March 1894 No. 6027. In the patented invention
referred to thin reels or flanged tubes of iron or steel or other hard metal or alloy
were enclosed in the cast or sheet metal knuckles of the hinge the flanges of the
reels constituting abutting or bearing washers or rings by which the wear of the
ends of the knuckles is borne and the tubular parts of the reels constituting hard
metal linings to the said knuckles for receiving the wear of the joint pin.
In carrying the present invention into effect we use in place of thin reels or
flanged tubes, thick unflanged tubes or tubular lengths of steel, gun metal or other
hard metal or alloy each of the said unflanged thick tubes having a length equal
to each of the knuckles of the hinge and of about half the thickness of the
substance of the completed knuckle, but we do not limit ourselves to this thickness
of the tubes we employ. The ends of the thick tubes or tubular lengths when
enclosed in the cast or sheet metal knuckles of the hinge constitute the abutting or
wearing ends of the said knuckles while the cylindrical parts of the tubes constitute
hard metal linings to the knuckles for the joint pin to work against, the said
tubular linings and their abutting ends being concealed by the cast or sheet metal
knuckles.
We cut the short tubes or tubular lengths of steel or gun metal or the like,
which we use, preferably from seamless drawn tubes but we do not limit ourselves
thereto as tubes otherwise made may be used for that purpose.
For giving a firm hold or bite of the cast or sheet metal knuckles upon the
interior hard metal tubular parts, we serrate or notch or otherwise make rough the
cylindrical exterior of the hard metal tubes or tubular lengths.
In making cast hinges according to this invention the short thick hard metal
tubes or tubular lengths are either placed in the proper relative positions in the
impressions in the flap mould, or are threaded upon a pin similar to the joint pin
of the hinge and placed in the flap mould. By the casting process a hinged flap
having bard metal lined knuckles with hard metal bearing or abutting ends is
made.
In making stamped or sheet metal hinges according to this invention we proceed
substantially in the manner described and represented in the specification of the
patent hereinbefore referred to excepting that thick tubes or tubular lengths are
substituted for.reels or flanged tubes.
Dated this Fourth day of March 1896
W. T. WHITEMAN,
Agent for the Applicants.

page_text: Improvements in the Manufacture of Door and other Hinges.
We TONKS LIMITED of Moseley Street, Birmingham in the County of
Warwick, Manufacturers and ARTHUR GEORGE TONKS, Director and Secretary
of Tonks Limited aforesaid Manufacturer, 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 of the improvements hereinafter described on an
invention for which Letters Patent were granted to Tonks Limited and William
Nock on the 22nd day of March 1894 No. 6027. In the patented invention
referred to, thin reels or flanged tubes of iron or steel or other hard metal or alloy
were enclosed in the cast or sheet metal knuckles of the hinge, the flanges of the
reels constituting abutting or bearing washers or rings by which the wear of the
ends of the knuckles is borne and the tubular parts of the reels constituting hard
metal linings to the said knuckles for receiving the wear of the joint pin.
In carrying the present invention into effect we use in place of thin reels or
flanged tubes, thick unflanged tubes or tubular lengths of steel, gun metal or other
hard metal or alloy, each of the said unflanged thick tubes having a length equal
to each of the knuckles of the hinge and of about half the thickness of the
substance of the completed knuckle, but we do not limit ourselves to this thickness
of the tubes we employ. The ends of the thick tubes or tubular lengths when
enclosed in the cast or sheet metal knuckles of the hinge constitute the principal
portions of the abutting or wearing ends of the said knuckles while the cylindrical
parts of the tubes constitute hard metal linings to the knuckles for the joint pin t
work against, the said tubular linings and their abutting ends being concealed by
the cast or sheet metal knuckles.
We cut the short tubes or tubular lengths of steel or gun metal or the like,
which we use preferably from seamless drawn tubes but we do not limit ourselves
thereto as tubes otherwise made may be used for that purpose. For giving a firm
hold or bite of the cast or sheet metal knuckles upon the interior hard metal
tubular parts, we serrate or notch or otherwise make rough, the cylindrical exterior
of the hard metal tubes or tubular lengths.
Figure 1 of the accompanying drawing represents in plan with the knuckles in
horizontal section, a cast brass door or other hinge made according to this invention
and Figure 2 is a cross section of the same taken on the dotted line a, a. Figure 1;
Figure 3 represents a portion of a seamless drawn hard metal tube from which the
short tubes or tubular lengths enclosed in the knuckles are made by dividing it at
the dotted lines f, f; b, c are the two flaps of the hinge; 63, 6 are the cast
portions of the knuckles of the flap b and c, c are the cast portions of the knuckles
of the flap c; d, d are the short hard metal tubes or tubular lengths enclosed by
the casting process in the cast kuuckles 6, e2 of the flaps b, c as represented in the
drawing; e is the joint pin on which the knuckles of the flaps turn. It will be
seen that the cylindrical exterior of the short hard metal tubes d, d is serrated,
notched or roughened for giving a firm hold of the cast metal knuckles b, c upon
them.
The short tubes or tubular lengths after they are cut from the long seamless
tube Figure 3 are notched, serrated or roughened; or the notching serrating or
roughening may be effected upon the long seamless tube before the short tubes are
cut from it.
In making the cast hinge Figures 1 and 2, the short thick hard metal tubes or
tubular lengths d, d are either placed in the proper relative positions in the

page_text: impressions in the flap mould, or are threaded upon a pin similar to the joint pin.
of the hinge and placed in the flap mould. By the casting process hinge flaps
having hard metal lined knuckles with hard metal bearing or abutting ends are-
made and are then jointed together to form a hinge as represented in the drawing.
In making stamped or sheet metal hinges according to this invention, we proceed
substantially in the manner described and represented in the specification of the
patent hereinbefore referred to excepting that the thick tubes or tubular lengths
are substituted for the reels or flanged tubes.
Having now particularly described and ascertained the nature of the said inven--
tion and in what manner the same is to be performed we declare that we claim as
the said invention.-
The improvements in the manufacture of door and other hinges hereinbefore
described and illustrated in the accompanying drawing; that is to say, enclosing in
the cast or sheet metal knuckles of the hinge, short thick unflanged tubes or
tubular lengths of steel, gun metal or other hard metal or alloy, the said thick
unflanged tubes or tubular lengths constituting hard metal linings to the knuckles
for the joint pin to work against, and the ends of the said thick unflanged tubes or
tubular lengths constituting the principal portions of the abutting or working ends.
of the said knuckles substantially as described and illustrated.
Dated the Fourth day of November 1896.
W. T. WHITEMAN,
Agent for the Applicants..