IMPROVE- MENTS IN WHEELS TO RUN ON TRAMWAYS AND ALSO ON COMMON ROADS to be as follows
Year: 1884

page_text: I THOMAS EDWARD KNIGHTLEY of No 106 Cannon Street in the City of
London, Surveyor do hereby declare the nature of my invention for
66 IMPROVE-
MENTS IN WHEELS TO RUN ON TRAMWAYS AND ALSO ON COMMON ROADS to
be as follows:-
"
This Invention has for its object improvements in wheels to run on tramways
and also on common roads.
I provide a flange to the wheel for use when on the tramway but capable of
being withdrawn for running on the common road.
The tyre is made in eight or other number of segments, as many as there are
spokes to the wheel. The segments can slide in and out. Each segment is held to
the side of the wheel by three studs passing through parallel slotted holes one at
the centre and the others one at either end of the segment. The centre slot is
radial to the axle. These segments are actuated by means of radial arms which
lay alongside the spokes of the wheel one arm along each spoke. The arms are
held to the spokes by clips which however admit of sliding along the spoke. Upon
the axle close alongside the wheel there is a disc; it is capable of being turned
relatively to the wheel through an angle of about 60 degrees and it has cam slots
cut in it. Each radial arm at its inner end is furnished with a stud entering one
of the cam slots.
The disc is turned when required by means of a lever inserted into radial holes
in the periphery of the disc provided to receive the lever. The form of the slots
in the disc is such that the rotation of the disc gives the requisite radial motion to
the arms and when the arms are out to their full extent a further movement of the
disc can take place and this locks the arms, the studs upon them then passing
into parts of the slots which are concentric with the axle.
At each end of each segment there is a flexible link connecting the end of the
segment with the adjacent radial arm. A stud projecting from the arm enters a
slotted hole in the inner end of the link. Hence the first part of the movement
of the radial arm in either direction takes place without moving the link whilst
the stud on the arm traverses from end to end of the slot in the link but in the
further motion of the arm it carries with it the link and the segment of the wheel

page_text: flange with which the link is connected. When the wheel flange is protruded for
use on the tramway the ends of the radial arms enter between the ends of the
adjacent segments so that no void spaces are left in the circumference of the tyre.
The operation in withdrawing the tyre is as follows-the disc being turned by
the lever the first movement of the disc simply unlocks the radial arms, next the
arms are drawn back and caused to leave spaces between the ends of the segments
and finally the segments themselves are retired.
In protruding the tyre the first movement of the disc brings the ends of the
radial arms to abut upon the ends of the segments; the arms then push the
segments outwards (until their ends are able to enter between the segments;
finally the movement of the arms is completed and the locking takes place.
Did the auth
T1 1001

page_text: I, THOMAS EDWARD KNIGHTLEY of N° 106 Cannon Street in the City of
London Surveyor do hereby declare the nature of my invention for "IMPROVE
" and in
what manner the same is to be performed to be particularly described and
ascertained in and by the following Statement:-
MENTS IN WHEELS TO RUN ON TRAMWAYS AND ALSO ON COMMON ROADS
This Invention has for its object improvements in wheels to run on tramways
and also on common roads.
'
I provide a flange to the wheel for use when on the tramway but capable of
being withdrawn for running on the common road.
The ring or tyre which forms this flange is made in eight or other number of
segments, as many as there are spokes to the wheel. The segments can slide in
and out. Each segment is held to the side of the wheel by three studs passing
through parallel slotted holes one at the centre and the others one at either end of
the segment. The centre slot is radial to the axle. The segments are actuated by
means of radial arms which lay alongside the spokes of the wheel one arm along
each spoke. The arms are held to the spokes by clips which however admit of
sliding along the spoke. Upon the axle close alongside the wheel there is a disc;
it is capable of being turned relatively to the wheel through an angle of about
60 degrees and it has cam slots cut in it. Each radial arm at its inner end is
furnished with a stud entering one of the cam slots.
The disc is turned when required by means of a lever inserted into radial holes
in the periphery of the disc provided to receive the lever. The form of the slots
in the disc is such that the rotation of the disc gives the requisite radial motion to
the arms and when the arms are out to their full extent a further movement of the
disc can take place and this locks the arms, the studs upon them then passing into
parts of the slots which are concentric with the axle.
At each end of each segment there is a flexible link connecting the end of the
segment with the adjacent radial arm. A stud projecting from the arın enters a
slotted hole in the inner end of the link. Hence the first part of the movement of
the radial arm inwards takes place without moving the link whilst the stud on the
arm traverses from end to end of the slot in the link but in the further motion of
the arm it carries with it the link and the segment of the wheel flange with which
the link is connected. When the wheel flange is protruded for use on the tramway
the ends of the radial arms push outwards to their full extent the ends of the
segments which carry with them the links and then enter between the ends of the
adjacent segments so that no void spaces are left. The operation in withdrawing
the flange is as follows:-the disc being turned by the lever the first movement of
the disc simply unlocks the radial arms, next the arms are drawn back and caused
to leave spaces between the ends of the segments and finally the segments them-
selves are retired.
In protruding the flange at the first movement of the disc the ends of the radial
arms abut upon the ends of the segments; the arms then push the segments
outwards until their ends are able to enter between the segments; finally the
movement of the arms is completed and the locking takes place..

page_text: The drawing hereunto annexed shews various views of a wheel constructed as
above described.
Figure 1 is an elevation of the outer side of the wheel, Figure 2 is an edge view,
Figure 3 is an elevation of the inner side of the wheel with some of the parts
removed and the flange protruded. Figure 4 is a similar elevation with the flange
withdrawn. Figures 5 and 6 shew side and end views of the slotted disc by which
the segments of the flange are moved inwards or outwards. Figure 7 shews a
section of the hub of one of the wheels with the disc carried by it and also shews
the end of the axle upon which. the wheel is mounted.
Figure 8 shews a bar by which the disc can be turned whenever desired.
Figure 9 shews a side elevation on a somewhat larger scale of part of the wheel
and some of the segments of the flange carried by it. Figures 10 shew views of
one of the flexible links by which the ends of the segments are coupled to the
radial arms and Figure 11 shews separately one of these arms.
A is a wheel made flat on its inner side as shown at Figure 2-B are the
segments of the flange which lie against the inner face of the "rim" or, periphery
of the wheel they are each held to the side of the rim by the heads of three bolts C
which bolts pass through slots in them and are fixed into the rim. The slots are
as shown inade parallel with a radial line passing through the centre of the
segment D D are radial arms which lie along the inner face of each spoke, of the
wheel-sideway movement of the outer end of these arms is prevented by stops a¹
which project from the inner face of each spoke and these ends of the arms are also
held to the spokes by cover plates E which are secured to the spokes-the outer
ends of these cover plates are also held by two of the bolts C as shewn at Figures 3
and 4. F are the flexible links which couple the ends of the segments to the
radial arms D-they are jointed to the segments in the manner shown and are held
to the radial arms by studs G the stems of which pass through slots in their inner
ends.
The inner ends of the radial arms pass through slots formed in a flange a* which
projects inwards from the inner side of the hub of the wheel as shown in Figure 7.
Each arm has a pin D¹ projecting from it which enters a slot cut in the disc H-
this disc is held against the flange a² in the manner shewn in the same figure.
Hare radial holes in the circumference of the disc into which the end of a bar I
see Figures 5 and 8 can be inserted whenever it is required to turn the disc. The
form of the slots cut in the disc H is clearly seen in Figure 5.
The way in which the parts act to protrude or withdraw the segments when the
disc H is turned in one or other direction is fully described above.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what
I claim is
1. The construction of a wheel with a moveable flange divided into segments
which can be protruded and made to project beyond the rim of the wheel or
withdrawn by means of arius moved radially along the spokes and the ends of
which arms are made to fit between the ends of the segments when the segments
are protruded substantially as described.
2. The construction of wheels' to run on 'tramways and also on common roads
substantially in the manner herein before described and illustrated in the drawing
annexed.