Improvements in or connected with Driving Gear for Motor Carriages.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in or connected with Driving Gear for Motor
Carriages.
We, ROBERT RINTOUL SYMON, of 20, Abchurch Lane, in the City of London,
Gentleman, and HENRY ALONZO HOUSE, Junior, of East Cowes, in the Isle of Wight,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention relates to the driving gear for communicating motion to the road
wheels of a motor carriage from the steam engine or other prime mover, and has
for its object the provision of means for preventing the entrance of dirt into the
teeth of the gear.
For this purpose we prefer to make the gearing of the kind known as internal
tooth gearing, and we mount the internally geared wheel on the inside of the road
wheel taking care to close the side of the internally geared wheel that comes next
to the road wheel with a disc or plate of sheet iron or other suitable material so
that no dirt can enter the teeth from that side. We fix on the stationary axle of
the carriages a disc or plate of sheet iron or other suitable material, the periphery
of which is turned up or otherwise flanged all round, thereby forming a kind of
circular dish into which the aforesaid internally geared wheel enters so that the
inside face of the latter is covered by the bottom of the dish, and its outer peri-
phery by the turned up or flanged edge thereof. The internally geared wheel
is thus enclosed at its two sides between two discs, one of which rotates with it,
and the other remains stationary, and pheripherally by the turned up or flanged
edge of the stationary disc, and if it were possible to preserve a close joint between
the rotating and stationary parts no dirt or dust could get into the gearing; but
as that is not practically possible we form a radially projecting flange on the inner
edge of the outer periphery of the internally geared wheel, which flange prevents
any dirt that enters between the rotating and stationary parts getting into the
teeth of the gearing, and guides it round to the lower part of the edge of the
stationary dish where a hole or holes is or are provided for its escape.
The stationary disc or dish is provided with an opening through which the shaft
passes carrying the pinion that gears with the teeth of the internal wheel, and if
desired this opening may be made large enough to enable the pinion itself to be
passed through, the opening being however covered with a suitable cover plate after
the pinion is in place. The entrance of dirt between the pinion shaft and the hole in
the fixed disc may be prevented by means analogous to those above described for
preventing the entrance of dirt into the internal wheel.
The enclosing discs and other parts for preventing the entrance of dirt may be
made in two or more pieces connected together by rivets, bolts and nuts, or other
suitable devices as may be convenient; and in some cases the enclosing covers may
be hinged together so that it is only necessary to unfasten one part and turn it on
its hinge in order to get at the gearing for purposes of cleaning, oiling, and so
forth.
It will be obvious that the turned-up edge or flange forming the periphery of the
:

page_text: cover plate after the pinion is in place. The entrance of dirt between the pinion
shaft and the hole in the fixed disc also may be prevented by means analogous to
those above described for preventing the entrance of dirt into the internal wheel.
The enclosing discs and other parts for preventing the entrance of dirt may be
made in two or more pieces connected together by rivets, or by bolts and nuts K,
or other suitable devices as may be convenient; and in some cases the enclosing
covers may be hinged together as at L for example, so that it is only necessary to
unfasten one part, by removing the bolts and nuts K for example, and to turn it
on its hinge in order to get at the gearing for purposes of cleaning, oiling, and so
forth.
It will be obvious that the turned up edge or flange forming the periphery of the
dirt-excluding cover may be made on the disc or plate C attached to the road wheel
as shown at C¹ in Figure 3 instead of on the stationary disc or plate E attached to
the axle. In this case the disc E is preferably extended out to or beyond the
flange C as shown by dotted lines at E2 in Figure 3. Or, if preferred, both discs C
and E may be flanged as shown by full lines in Figures 3 and 4.
In the
The disc or plate E may be secured to the axle by any suitable means.
drawings it is shown secured thereto by clamping the cast iron or other plates M,
to which the parts of the disc or plate E are rivetted, by means of the bolts and
nuts K.
Similar letters of reference relate to like parts in all the figures of the drawings.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, we declare that what we
claim is:
First. The devices for preventing the entrance of dirt into the teeth of the driving
gear of motor carriages, which consist of a disc or plate C fixed to the road wheel
or to the geared driving wheel so as to revolve therewith, and a flanged or dished
disc or plate E, E¹, fixed on the axle of the carriage, the two discs or plates C
and E, E, being adapted to enclose the geared driving wheel between them,
substantially as described with reference to Figures 1 and 2 of the drawings.
Second. The modification of the devices forming the subject matter of the first
claiming clause hereof, in which a flanged or dished disc or plate C, C¹, is fixed to
and revolves with the road wheel and geared driving wheel, and a plain disc or
plate E, E is fixed on the axle of the carriage, substantially as described with
reference to Figure 3 of the drawings.
Third. The modification of the devices forming the subject matter of the first
claiming clause hereof, in which a flanged or dished disc or plate C, C¹ is fixed
to and revolves with the road wheel and geared driving wheel, and a flanged or
dished disc or plate E, E¹, is fixed on the axle of the carriage, substantially as
described with reference to Figures 3 and 4 of the drawings.
Fourth. In combination with the devices forming the subject matters of the first,
second and third claiming clauses hereof, the use of a radial flange G on the outer
periphery of the geared driving wheel, substantially as described, and for the
purpose specified.
Fifth. Devices for preventing the entrance of dirt into the teeth of the driving
gear of motor carriages, constructed and operating substantially as described.
1000
Janu
THIRT GIZ TER
Y
DHIRIT GILLS TUILLY
R. R. SYMON,
H. A. HOUSE, JUNIOR,
Per W. H. Beck,
Agent, 115, Cannon Street, London, E.C.