Year: 1887

page_text: Date of Application, 27th Apr., 1887
Complete Left, 29th Sept., 1887
Complete Accepted, 1st Nov., 1887
I, OTTO JAGENBURG, of Plettenberg, in the Empire of Germany, do hereby declare
the nature of this invention to be as follows:-
Fish plates used in the construction of railways are as a rule, fixed with four bolts
or screws. A locking pin or wire can be used for each pair of screws. This locking
pin (capable of being bent or sprung) is inserted in an opening formed by a groove
between one of the nuts and the fish plate. The other end of the pin can be inserted
under the end of the next nut by knocking the wire straight.
This arrangement has the disadvantage that the withdrawal of the locking pin
previous to tightening up or taking off the nut, can be accomplished only with
difficulty and loss of time.
The object of this invention is to provide a locking device in which this very dis-
advantageous defect is remedied, by having the locking wire made of a spiral spring
with ends bent tangentially thereto, and which can be removed by a specially con-
structed pair of tongs, easily, quickly and without damage to any of the parts, after
which the respective pair of screws may be tightened or taken off by a turn screw or
spanner.
In carrying out the invention I form both the fish plates of the joint with a groove.
The groove on the fish plates which carry the nuts, is made in a line with the centre
of the bolt holes. The groove on the other fish plate which carries the head of the
bolt is made close to the upper edge of the bolt holes.
In the latter groove the heads of the bolts are so formed with a lip or nose as to
fit into the groove in the fish plate so that the bolt is prevented from turning when the
nut is screwed tight. The groove is preferably made so as to form in section a
semicircle. The nuts are provided on their under surface with grooves of a
corresponding shape running from the centre of each flat, either to the hole or for
convenient distance.
The nuts are screwed on in such a manner, that two of their grooves cover the
groove in the fish plate, whereby a straight hole of a circular section is formed under
he nuts.

page_text: The use of this groove on the fish plate as well as the grooves on the under face
of the nuts is not new. It is also not new to secure two nuts by one piece of wire
which is inserted in the openings formed by the grooves, and then knocked straight.
This pin or wire must however be removed by a chisel each time the joint is to be
loosened, which is troublesome and loses time. A spiral spring is used instead of
this simple pin, and is applied to lock the nut in the following way-
The wire spring is seized behind the two ends which are bent tangentially in
opposite directions, by suitably constructed tongs, and the ends are bent towards each
other by closing the tongs. In order that the spring may be held firmly in the tongs,
and not fly off, the jaws of the tongs may be bent inwards or constructed in other
suitable manner.
One of the wire ends can now be placed under one of the nuts by sliding it into
the groove. The other end is also placed in the groove. The tongs are then opened
so that the ends again rebound from each other, and the end of the wire penetrates
the opening formed by the groove in the other nut, and the corresponding groove
in the fish plate.
If the lock nut is to be unscrewed, the wire spring is again seized behind the two
tangentially bent ends by the jaws of the tongs. The tongs are then closed until the
ends of the wire spring aro drawn together sufficiently to allow one end to leave
its opening. The other end of the spring may then be drawn out from the other
opening.
The chief features of the present lock nut consist of the spiral spring with ends
bent tangentially in opposite directions, and of tongs having jaws with projections
hent inwards by means of which the ends of the said spring can be pressed together
in a simple and convenient manner.
Compared with the simple pin, otherwise used, tho spiral spring offers the important
advantage that it can be removed in a very easy and simple manner by means of the
tongs above described.
1
1 1002
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool,
Agents for the Applicant.

page_text: 1, OTTO JAGENBURG of Plettenberg, in the Empire of 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 :-
Fish plates used in the construction of railways are, as a rule, fixed with four
bolts or screws. A locking pin or wire can be used for each pair of screws.
This arrangement has the disadvantage that the withdrawal of the locking pin
previous to tightening up or taking off the nut can be accomplished only with
lifficulty and loss of time.
The object of this invention is to provide a locking device in which this very dis-
advantageous defect is remedied, by having the locking wire made of a spiral spring
with ends bent tangentially thereto, and which can be removed by a specially con-
structed pair of tongs, easily, quickly, and without damage to any of the parts, after
which the respective pair of screws may be tightened or taken off, by a turn screw or
spanner.
In the annexed drawing,
Figure 1, is the nut lock represented from the track side, as applied to a fish-plate
for railway rails.
Figure 2, is a section taken through the nut lock.
Figure 3, represents the spiral spring. used as a locking device, with tangentially
bent ends.
Figure 4, represents back views of two variations of the nut which may be used.
Figure 5, shows the special construction of the tongs.
In carrying out the invention, I form both the fish plates of the joint represented
in Figure 1, with a groove. The groove n on one of the fish plates, is made in a
line with the centre of the bolt holes. The groove n on the other fish plate which
carries the head of the bolt is made close to the upper edge of the bolt holes.
In the latter groove, the heads of the bolts a, are so formed with a lip, or, nose, a¹,
as to fit into the groove n' in the fish plate, so that the bolt is prevented from turning
when the nut is screwed tight. The groove n forms in section a semi-circle. The
nuts bare provided on their under surface with radial grooves 6' running from the
centre of each flat either to the hole, or for a certain distance, as shown in
Figure 4.
The nuts are screwed on in such a manner that two of their grooves 6 cover the
groove n in the fish-plate, whereby a straight hole of a circular section is formed
under the nuts.
The use of this groove n, as well as the grooves b' on the under face of the nuts, is
It is also not new to secure two nuts by one piece of wire inserted in the
openings formed by the grooves, and then knocking them straight. This pin or wire
not new.

page_text: must, however, be removed by a chisel each time the joint is to be loosened, which is
troublesome and loses time. Instead of this simple pin, a spiral spring is used,
applied to lock the nut in the following way.
The wire spring is seized behind the two ends, which are bent tangentially in
opposite directions, by suitably constructed tongs (Figure 5), and the ends are bent
towards each other by closing the tongs. In order that the spring may be held
firmly in the tongs and not fly off, tho jaws c are bent as shown in Figure 5.
One of the wire ends is now placed under one of the nuts, b, by sliding it into the
groove n. The other end is also placed in the groove n. The tongs are then opened
so that the ends e el again rebound from each other, and the end of the wire e
penetrates the opening formed by the groove in the other nut, and the corresponding
groove n in the fish plate.
If the nut is to be unscrewed, the wire spring is again seized behind the two
tangentially bent ends, by the jaws of the tongs. The tongs are then closed, until the
ends e and el are drawn together sufficiently to allow one end to leave its opening.
The other end of the spring may then be drawn out from the other opening.
The chief features of the present nut lock consist of the spiral spring with ends
bent tangentially in opposite directions, and of tongs having jaws with projections
bent inwards, by means of which the ends of the said spring can be pressed together
in a simple au convenient manner.
Compared with the simple pin, otherwise used, the spiral spring offers the important
advantage that it can be removed in a very easy and simple manner, by means of the
tongs above described.
Having now particularly described, and ascertained, the nature of the said
invention, and in what manner the same is to be perforined, I declare, that what I
claim is :-
1st. A device for locking nuts, consisting of a spiral spring f, the ends of
which (e, e) are bent tangentially in opposito directions, and are then pushed into the
openings formed by the groove n in the fish-plate, or any interposed plate, and the
groove under each pair of nuts which face it, substantially as described.
2nd. For the insertion and removal of the spiral spring, the use of a pair of tongs,
provided with projecting fangs, c, by which the spring ends, can be firmly pressed
together, when the tongs are closed, and released when the tongs are opened, so
that they spring into the corresponding openings under the nuts, substantially as
described.
Dated this 28th day of Santainber 1887