Improvements in Interlocking Apparatus for Railways.
Year: 1889

page_text: Date of Application, 30th Jan., 1889
Complete Specification Left. 28th Oct., 1889-Accepted, 14th Dec., 1889
PROVISIONAL SPECIFICATION.
Improvements in Interlocking Apparatus for Railways.
WILLIAM FREDErick Burleigh 106 Camberwell New Road London S.E. Engineer
do hereby declare the nature of this invention to be as follows:-
My Improvements in Interlocking Apparatus for Railways consists in interlocking
the catch handle or its equivalent through the action of a novel form of locking shaft
connected to the lever in such a manner as to give the shaft both a sliding and
rocking or rotary movements during the change of position from the normal to the
pulled over state of the lever.
I prefer to carry this into effect as follows I provide a round shaft (preferably
horizontal) opposite to each lever mounted on a guiding bar or locking trough having
necessary grooves and ribs in such a manner that it is free both to revolve and slide,
portions of the shaft where necessary being cut away or flattened so as to receive
locks and give motion to locks or in some cases a hole drilled through the shaft in
which a loose pin is inserted to form a connection between lock and lock or into which
a bolt may be slid by the rotary movement of other shafts, the end of the shaft next
the lever I form as a single eye joint at an angle say 40 when the catch handle or its
equivalent is normal and vertical when the catch handle is raised, to the single eye.
joint I attach a short spindle having at one end a double joint which clips the single
eye joint on the shaft through which joint a pin is inserted in the usual manner
I provide a crank on the spindle from which a rod connection goes upwards toward
the catch handle or its equivalent and the other end of the spindle I form ball shaped
to work in a corresponding socket preferably in the shoe of the lever thus forming a
universal joint that allows the shaft to rotate say a quarter of a circle and also to slide
backward and forward parallel in the locking trough whilst the lever works on a
centre in the usual manner, from the crank on the spindle I carry up a rod which I
connect to an unequal arm, cross bar or lever and from that a rod connection up to
the catch rod & handle so increasing the motion on crank on the spindle when the
catch handle is raised or lowered.
The action being that raising the catch handle turns the shaft say a quarter of a
circle, pulling the lever over slides the shaft forward and putting the catch handle
down again gives the shaft a quarter turn back again and vice versa in putting the
lever back to its normal state again. The sliding motion on the shaft I arrange so
that the flat portion of the shaft used for locking purposes is in a line with the
grooves of the locking trough when normal and in a line with the ribs of the locking
trough when pulled over, and the flat portion of the shaft used for releasing
purposes is in a line with the ribs when normal and in a line with the grooves
when pulled over.
The locks I form with flat surfaces to come against the flat
portions of the shafts or with a bolt to enter a hole in the shaft or of any suitable shape
with or without friction roller and connect them together so that they slide at right
angles to the shafts in the grooves of the locking trough the connecting slides from
lock to lock can run at right angles both above and below the shafts but preferably above
only. The flat portion of the shaft when the shaft is turned the quarter of a circle
moves the lock so as to cause it or another lock to come against the flat portion of
another shaft so preventing that shaft from being turned and consequently locking
its catch handle or in some cases turning one shaft pins or bolt locks other shafts
so preventing them from being turned. The positions of the flat portions, holes &c.
on the shaft and the locks being varied to suit the various tables of locking to be
carried out. In some cases I carry the shaft right across and support it on locking
troughs on both sides of the levers and vary the universal joint attachment to the
lever to suit.

page_text: The rod connection from the catch handle can be varied or the catch handle in
ordinary use can be dispensed with and an equivalent in the form of a front handle
made to turn a quarter of a circle and connected with rod connection direct to the
before mentioned spindle can be used.
Dated this 30th day of January 1889.
WILLIAM FREDERICK BURLEIGH.
COMPLETE SPECIFICATION.
Improvements in Interlocking Apparatus for Railways.
WILLIAM FREDERICK BURLEIGH 43 Angles Road, Streatham, S.W. Engineer do
hereby declare the nature of this invention and in what manner the same is to he
performed, to be particularly described and ascertained in and by the following
statement :-
My Improvements in Interlocking Apparatus for Railways consists in interlocking
the catch handle or its equivalent through the action of a novel form of locking shaft
connected to the lever in such a manner as to give the shaft both a sliding, and
rocking or rotary movements during the change of position from the normal to the
pulled over state of the lever.
I prefer to carry this into effect as follows I provide a round shaft 8 (preferably
horizontal) opposite to each lever 9 mounted on a guiding bar or locking trough 10
having necessary grooves 11 and ribs 12 in such a manner that it is free both to
revolve and slide, portions of the shaft 13 where necessary being cut away or flattened
so as to receive locks 14 and give motion to locks or in some cases a hole drilled
through the shaft in which a loose pin is inserted to form a connection between lock
and lock or into which a bolt may be slid by the rotary movement of other shafts, the
end of the shaft 15 next the lever I form as a single eye joint at an angle say 45° to
90° when the catch handle 16 or its equivalent 17 is normal and vertical when the
catch handle is raised, to the single eye joint 15 I attach a short spindle 18 having at
one end a double joint 19 which clips the single eye joint on the shaft through which
joint a pin is inserted in the usual manner I provide a crank 20 on the spindle from
which a rod connection 21 goes upwards toward the catch handle or its equivalent
and the other end of the spindle 221 form ball shaped to work in a corresponding
socket preferably in the shoe of the lever 23 thus forming a universal joint that allows
the shaft to rotate say a quarter of a circle and also to slide backward and forward
parallel in the locking trough 10 whilst the lever works on a centre 24 in the usual
manner, from the crank 20 on the spindle I carry up a rod 21 which I connect to an
unequal arm, cross bar or lever 25 and from that a rod connection up to the catch rod
and handle so increasing the motion on crank on the spindle when the catch handle is
raised or lowered.
The action being that raising the catch handle 16 turns the shaft 8 say a quarter of
a circle, pulling the lever 9 over slides the shaft 8 forward and putting the catch
handle 16 down again gives the shaft S a quarter turn back again and vice versa in
putting the lever back to its normal state again. The sliding motion on the shaft
arrange so that the flat portion 13 of the shaft 8 used for locking purposes is in a
line with the grooves 11 of the locking trough 10 when normal and in a line with the
ribs 12 of the locking trough when pulled over, and the flat portion of the shaft used
for releasing purposes is in a line with the ribs when normal and in a line with the
grooves when pulled over. The locks 14 I form with flat surfaces to come against
the flat portions 13 of the shafts or with a bolt 26 to enter a hole in the shaft or of
any suitable shape with or without friction roller and connect them together so that
they slide at right angles to the shafts in the grooves of the locking trough the
connecting slides 27 from lock to lock can run at right angles both above and below
the shafts 8 but preferably above only. The flat portion 13 of the shaft 8 when the
shaft is turned the quarter of a circle moves the lock 14 so as to cause it or another
lock to come against the flat portion of another shaft so preventing that shaft from

page_text: being turned and consequently locking its catch handle 16 or in some cases turning
one shaft pins or bolt locks other shafts so preventing them from being turned. The
positions of the flat portions, holes &c. on the shaft and the locks being variod to suit
the various tables of locking to be carried out. In some cases I carry the shaft right
across and support it on locking troughs on both sides of the levers and vary the
universal joint attachment to the lever to suit.
The rod connection from the catch handle can be varied or the catch handle in
ordinary use dispensed with and an equivalent in the form of a front handle 17 made
to turn a quarter of a circle and connected with the rod connection direct to the
before mention spindle 18 can be used as shown on Figs. 2, 6, 7.
The special feature of novelty in my present method of interlocking consists of
attaching a shaft or arm to the lever in such a manner as to impart to the shaft three
distinct movements in working the said lever from its normal to its pulled over
state viz. 1st raising the catch rod causes the shaft to turn or rotate a portion of a
circle, 2nd pulling the lever over causes the shaft to slide or move across the locking
trough so altering the position of the shaft, 3rd putting down the catch rod causes the
shaft to turn a portion of a circle back again when in its altered position and rice versa
in putting back the lever to its normal position the shaft being so arranged that the
wide portion is presented to the locks during the traverse of the lever in either
direction.
I wish it to be clearly understood that although I use locking troughs and
connecting slides in this system of interlocking somewhat similar to the system of
interlocking known as tappet locking (bevel locking, wedge locking, mitre locking
or Stevens and Sons system the 1st patent for which was granted them in 1870
numbered 746 and of which system numerous modifications have since been patented
including patents No. 15820-1887 & No. 985-1888 granted to me) yet my present
system differs in this essential and distinctive feature viz. that in all tappet locking
the motion given to locks is through the medium of a bevel whereas my present
system it is the twisting or rotary motion of the shaft & not a bevel that gives
motion to locks and not being dependent on the bevel movement I can pack
the locks and slides on edge so taking up much less space in the locking troughs
an important feature in large and complicated apparatus.
It also has the advantage that any lock, slide, or shaft can be taken out without
disturbing other locks, slides, or shafts thus adding to the safety in maintenance.
It also differs from other systems where the rotary movement of a shaft or its
equivalent gives motion to locks as in this case the shaft has both a rotary and
reciprocating movement and not a rotary movement only.

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Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what i
claim is:
1st. A shaft attached to the lever and arranged so as to be turned by the catch
handle and moved by the lever substantially as described.
2nd. The use of the universal or gimbal joint herein figured 19 for the purpose
of turning by the catch handle a shaft or its equivalent attached to and moved by
the lever substantially as described.
3rd. Arrangement of connecting slides in locking trough substantially as shown
on Fig. 4.
4th. Apparatus arranged and combined substantially as described and illustrated
on the accompanying drawings.
Dated this 28th day of October 1889.
WILLIAM FREDERICK BURLEIGH.