Improved Construction of Hinge-joints and the Method of Manufacturing the same.
Year: 1892

page_text: Date of Application, 9th Jan., 1892
Complete Specification Left, 4th Oct., 1892-Accepted, 5th Nov., 1892
PROVISIONAL SPECIFICATION.
Improved Construction of Hinge-joints and the Method of
Manufacturing the same.
We, FRIEDRICH LORCH, of 28, Westendstrasse, Karlsruhe, OTTO SCHOLL, of
Ettlingen, and JULIUS KALLER, of Ettlingen, all in Baden, Germany, do hereby
declare the nature of this invention to be as follows:-
This invention relates to an improved construction of hinge-joints in which the
pivot of the hinge is formed by tubular bosses upon the one part of the hinge. For
this purpose the hinges are constructed as follows.
In the case of a simple hinge or articulated joint consisting of two flat plates con-
nected together by a pivot pin, we form in the first instance in the one plate a
small hole either by drilling or punching, and then, by means of a succession of
punches and dies, this hole is first enlarged by bulging the metal surrounding it
somewhat on one side, and then this bulged portion is drawn out in length and made of
cylindrical external configuration, so as to constitute a tubular pivot pin. The second
plate then has a hole drilled or punched in it, of a size corresponding to the external
diameter of the said tubular pin, so as to be fitted loose over the latter. The end of
the tubular pin, which is of such a length as to project beyond the second plate, is
then rivetted over outwards, so as secure the two parts together, the second plate
being free to turn on the tubular pivot of the first one.
When the joint requires to be a double one, that is to say, one in which the one
part fits between a fork on the other part, the two limbs of such fork have, in the
first instance, each a hole drilled in them and are then bulged inwards and formed
into two tubular projections facing each other within the fork. The forked end of
the second piece then has two holes formed in its limbs corresponding to the
tubular projections, and the limbs carrying the latter are now bent sufficiently out-
wards while the limbs with the holes are bent sufficiently inwards for the latter to
be introduced between the tubular projectons of the former, whereupon these are
bent inwards again, and the limbs with the holes are bent outwards, so as to cause
them to fit over the tubular projections, and thus form the hinge joint. The inner
part, instead of being made forked, may be a solid piece, in which case the limbs
with the tubular projections will of course have to be bent outwards to a greater.
extent, to allow of the introduction of the solid part.
In this case, as also in the preceding one, the bending of the limbs may be
rendered unnecessary, by first forming the holes for the hinge in the one part, and
then after introducing this between the limbs of the forked other part, forming the
tubular projections on the latter by punching the metal directly into the holes of
the first named part.
According to another modification the tubular projections on the one fork are
made to project outwards, and the fork of the second part is then fitted externally
upon these instead of internally as before.
Dated this 9th day of January 1892.
ABEL & IMRAY,
Agents for the Applicants.

page_text: Improved Construction of Hinge-joints and the Method of
Manufacturing the same.
We, FRIEDRICH LORCH, of 28 Westendstrasse Karlsruhe, OTTO SCHOLL of
Ettlingen, and JULIUS KALLER of Ettlingen, all in Baden, Germany, do hereby
declare the nature of this invention and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:-
:-
This invention relates to an improved construction of hinge-joints in which the
pivot of the hinge is formed by tubular bosses formed upon the one part of the
hinge. For this purpose the hinges are constructed as follows.
As shewn in Fig. 1 a simple hinge or articulated joint consisting of two flat plates
connected together by a pivot is thus constructed. We form in the first instance in
the one plate a a small hole a' either by drilling or punching and then by means of
a succession of punches and dies, this hole is first enlarged by bulging the metal
surrounding it on one side as at a and then this bulged portion is drawn out in length
and made of cylindrical external configuration, so as to constitute a tubular pivot.
The second plate then has a hole 1 drilled or punched in it, of a size corresponding
to the external diameter of the tubular pivot a², so as to fit freely thereon. The
end of the tubular pivot a² which projects a little beyond the plate is then rivetted
or burred over so as to hold the two plates a and b together, the one being free to
turn relatively to the other.
When the joint requires to be a double one that is to say, one in which the one
part fits, between a fork of the other part, the construction is shewn in Fig. 2. The
two limbs of one of the forks d have, in the first instance holes drilled in them.
The holes d' are then bulged inwards and formed into tubular projections & facing
each other within the fork. The forked end of the second piece e then has two
holes e formed in its limbs corresponding to the tubular projections d. The limbs
of d are now bent outwards, and the limbs of e are bent inwards and introduced
between the projections whereupon the limbs of d are bent inwards again, and
the limbs of e are bent outwards, so that their holes el fit over the projections (',
thus forming the hinge joint. The inner part e, instead of being made forked, may
be a solid piece c as shewn in Fig. 4, in which case the limbs of d have necessarily
to be bent outwards to a greater extent, to allow of the introduction of the solid
part c.
In this case, as also in the preceding one, the bending of the limbs may be
rendered unnecessary, by first forming the holes for the hinge in the one part e
or c and then, after introducing this between the limbs of d, forming the tubular
projections on the latter by punching the metal directly into the holes of e or c.
According to another modification shewn in Fig. 3 the tubular projections d' are
made to project outwards, and the fork of d is then fitted upon these.
I
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. A hinge joint having a hollow pivot formed by punching up the metal of the
one part to fit in a hole of the other part.
2. The herein described method of manufacturing hinge joints by punching up
the metal surrounding a hole in a plate or in each limb of a fork of the one part, so
as to form a tubular pivot or a pair of such pivots.
3. The herein described method of connecting the two parts of a fork hinge joint,
by forming on the one part tubular pivots, on the other holes to fit them, bending
the limbs of the fork or forks to allow introduction of the one part between the

page_text: forks of the other, then bending back the limbs so as to engage the pivots in the
holes.
4. The herein described method of connecting the two parts of a hinge joint by
punching metal surrounding a small hole in the one part, into a hole of the other
part so as to form a hollow pivot therein.
ABEL & IMRAY,
Agents for the Applicants.