IMPROVEMENTS IN THE MANUFACTURE OF BUTT HINGES
Year: 1873

page_text: LETTERS PATENT to Joseph Underhill, of Rifle Hill Works, Aston
New Town, Birmingham, in the County of Warwick, for the Inven-
tion of "IMPROVEMENTS IN THE MANUFACTURE OF BUTT HINGES."
Sealed the 12th June 1874, and dated the 15th December 1873.
PROVISIONAL SPECIFICATION left by the said Joseph Underhill at the
Office of the Commissioners of Patents, with his Petition, on the
15th December 1873.
I, JOSEPH UNDERHILL, of Rifle Hill Works, Aston New Town,
Birmingham, in the County of Warwick, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN THE MANUFACTURE OF BUTT
HINGES," to be as follows:-
This Invention relates to an improved method of manufacturing
hinges of the kind ordinarily known as "butt" hinges, which consist of
pieces of sheet brass or other suitable metal, sufficiently flexible, of

page_text: suitable size and shape, stamped or otherwise cut out of sheets of such
metal, and then bent over so as to form the hinges in a novel shape and
form, whereby the joints or joinings of the parts of such hinges when
bent back and strain is put upon them press against each other, and thus
prevent any opening or unlocking of such joints or joinings on the face,
as in such hinges as heretofore constructed, making a more firm,.
durable, and effective hinge than such hinges made in the method
ordinarily hitherto used and practised.
In order to carry out my Invention I make the pieces of sheet brass
or other metal, each of which is to form one half of a hinge, consist each
of a plate of a shape preferably rectangular and of such a size that when
its outer end is doubled over to the back of the hinge it forms a plate
of double thickness and of the size required to form the body of the
hinge, through which holes are drilled or punched to receive the screws
by which it is fixed to the article to which it is to form a hinge. Upon
one side of this plate I form one or more projecting rectangular pieces of
such width that when bent over towards the back of the hinge they form
the tubes or sockets in which the wire which forms the joint of the
hinge fits.
Each complete hinge consists of two plates stamped or cut out, and
having the projecting pieces bent over to form the sockets in the way
described, the projecting pieces forming the sockets upon one such plate
being so arranged as to be opposite to and fit into the spaces between
the corresponding projecting pieces forming the sockets upon the other
plate, and by the arrangement above described the joinings between the
ends of the projecting pieces forming the tubes, and the edge of the
plate bent over to form the body of the hinge, are arranged to meet at
the back part of the hinge instead of the front, and when strain or
pressure is put upon them in opening the article to which the hinge is
attached the joints or joinings meet and press against the socket and
each other, and renders it impossible for the hinge to come asunder, as is
the case in such hinges as heretofore constructed and used.
Each pair of plates as described may be stamped or cut out of the..
same piece of metal, so that the projections at the side of one plate fit
between those at the side of the other plate, and economy is effected in.
the metal used.
Instead of two thicknesses of metal which form the body of the
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page_text: more separate plates of metal may be used, soldered, screwed, rivetted,
or preferably rolled in two thicknesses, with a shoulder at that part
which commences the socket, whereby a firm, durable, and more effective
hinge is produced than has heretofore been the case.
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more separate plates of metal may be used, soldered, screwed, rivetted,
or preferably rolled in two thicknesses, with a shoulder at that part
which commences the socket, whereby a firm, durable, and more effective
hinge is produced than has heretofore been the case.
The holes for the screws may be widened or countersunk upon one or
both sides of the compound plate which forms the body of the hinge.