other such like Motors or Vehicles.
Year: 1888

page_text: other such like Motors or Vehicles.
1, ALFRED DICKINSON of Tramway Depot, Darlaston in the County of Stafford
Tramway Manager, do hereby declare the nature of my said invention and in what
manner the same is to be performed to be particularly described and ascertained in
and by the following statement :-
:-
My invention has for its object improvements in gearing for tramway engines and
Cars, and for other such like motors or vehicles or is applicable to either steam
tramway engines, electrical engines or to any kind of engine or car where gearing is
required to transmit the power from one shaft to another, and is for the purpose of
enabling me to use helical gear which has not been possible where side liberty or play
has been required as is the case in such vehicles.
In order that my invention may be clearly understood and easily carried into
practice I have appended hereunto one double sized sheet of drawings upon which I
have illustrated two modes by which helical gear may be used with the greatest
freedom and from which it will be easy for the invention to be applied to any circum-
stances which may arise in practice.
Figure 1 is a plan showing three shafts transmitting power the one to the other
through helical gearing.
Figure 2 is a sectional elevation of the pinion K on the line P. R.
Figure 3 is a cross sectional elevation of the spur wheel N on the line A. B.
Figure 4 is a front elevational section of the spur wheel N on the line P. R.
For the purpose of this explanation the driving pinion D is fixed upon the motor or
driving shaft C and gears into the spur wheel H which is carried upon the intermediate
shaft E. This intermediate shaft also carries the pinion K which gears into the spur
wheel N which is carried by the shaft or axle M. Now supposing the shafts C
and E to be firmly fixed, through which by electrical or other power it is required to
drive the axle M it is evident that with the use of helical gear there would be no
possibility of M having any lateral or side play which is so very necessary in engines
or vehicles travelling round curves and indeed in going over the rails of ordinarily laid
permanent ways. To overcome this difficulty I make the pinion K to slide upon the
D27

page_text: shaft E upon one, two, or more key ways k¹, k², etc. in which case the spur wheel N
may be fast upon the shaft M as sufficient side play would be allowed upon the shaft E or
if it is desirable that the side play should take place directly in the shaft M then the
spur wheel may be either fixed upon keys as shown at Figure 2 or the spur N may be
made with a separate boss or centre n¹ as seen at Figures 3 and 4 this boss being
formed in two parts which are held together by the bolts n³ or any other suitable
arrangement. The spur N is then bored so that the two parts of the boss will fit
therein and the keys n¹ are fitted in the spur part of the wheel N so as to slide freely
in the grooves which are formed in the part n'. The horns no of the keys n may be
secured to the spur part N by set pins or simply placed in by friction which would
generally be found sufficient as there would be no liability of them falling out from
their position. The centre part n¹ of the wheel would be securely fastened to the
shaft M by either an ordinary key way or in any other desired manner and it will be
readily understood that the spur N will have liberty to move in the spaces n³ or n
only being limited by the collars n² on either side. These collars might be placed on the
spur N and the keys reversed into the blocks or centres n¹ and the boss n¹ may form
if necessary a part of the shaft M. In any case it will be understood that by this
means a thoroughly steady lateral action is obtained without sacrificing the noiseless
action of the helical gear.
I have shown an example of the gear which would probably be used in the case of
an electrical tram engine, but it will sufficiently illustrate the principle to enable the
application to be made either to tramway cars or ordinary tramway engines.
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed 1 declare that what I claim is :-
The improvements in gearing for tramway engines and cars and for other such like
motors or vehicles so that side play may be ensured in combination with the noise-
less action of helical gear substantially as herein set forth and shown upon the
drawings.
Dated this 20th day of November 1888