Improved Double Crank Shaft Bracket for Traction Engines and Road Rollers.
Year: 1895

page_text: Date of Application, 14th June, 1895
Complete Specification Left, 14th Mar., 1896-Accepted, 18th Apr., 1896
PROVISIONAL SPECIFICATION.
Improved Double Crank Shaft Bracket for Traction Engines and
Road Rollers.
JAMES HUTCHINSON MANN, Engineer, Canning Works, Dewsbury Road Leeds,
SIDNEY CHARLESWORTH, Engineer Canning Works, Dewsbury Road Leeds, do
hereby declare the nature of this invention to be as follows:-
:―
To obviate having the sliding pinions outside the bearing and on the overhanging
end of the crank shaft of traction engines and road rollers, we employ the following
arrangement which consists of a trough shaped double crank shaft bracket, partially
encasing the crank shaft or sliding pinions, there is a hole in the bottom of the
trough to admit of the teeth of the intermediate wheel coming into gear with the
teeth of the crank shaft pinions. The bracket is fitted up with two pairs of
brasses, one being on the end of crank shaft outside the pinions, and the other on
the inside, this brings the pinions between bearings and obtains the advantages of
an inside gear engine, without the addition of the extra intermediate shaft, gear
wheels &c. The pinions are cast together enabling us to throw either the fast or
slow speed one into gear with the use of only one lever, and at the same time it is
impossible for them both to be in gear together.
Dated this 13th day of June 1805
JAS. H. MANN.
SIDNEY CHARLESWORTH.
An Improved Double Crank Shaft Bracket for Traction Engines and
Road Rollers.
We JAMES HUTCHINSON MANN and SIDNEY CHARLESWORTH both of
Canning Works, Dewsbury Road, Leeds in the County of York Engineers 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:-
We
The object of our invention is to avoid having the sliding pinions outside the
bearing and on the overhanging end of the crank shaft of traction engines and road
rollers. This object we effect by the following device or arrangement.
provide a bracket, conveniently trough shaped, having a bearing for the crank
formed in or on both ends (i.e. the cross pieces forming and closing the ends of)
the bracket. Somewhat towards one end or side, the bracket is provided with a
flange, corresponding to the shape of the bracket conveniently semi-circular
or D shaped. By means of this flange the bracket is bolted to the shoulder plate
of the engine, a semi-circular or D or other suitably shaped opening or recess being
cut out in the upper portion of the shoulder plate, in which the bracket fits. The
fast and slow gear pinions, attached to or cast in one piece with a common sleeve,
are fitted capable of sliding on that portion of the crank shaft, which lies between
the bearings in the ends of the bracket. In order to permit the intermediate wheel
to gear with the pinions, an opening is formed in the bracket to admit the rim of

page_text: the intermediate wheel. The length of the sleeve between the pinions is slightly
greater than the width across the (double) rim of the intermediate wheel; so that
according to the position of the sleeve, both pinions may be out of gear, or the one
or other of the pinions in gear with the intermediate wheel. It will be understood
that in order to gear with the pinions, which are of different diameters, the
intermediate wheel is provided with two toothed rims of different diameters. It is
evident that a single lever connected to the sleeve suffices to throw either the fast
or slow pinion into gear, or both out of gear; whilst it is impossible to throw both
pinions into gear at once. Further this bracket device obtains the advantage of
an inside gear engine without the addition of the extra intermediate shaft, gear
wheels and the like, which are now generally necessary.
Further we wish it to be understood that the cross section of the bracket may be
of other than semicircular or D shape, for example it may be made rectangular in
cross section, also that the bracket need not of necessity be trough shaped,
i.e. provided with a bottom having an opening through it, but may be entirely
open, or more or less closed over the bottom.
And in order that our invention and the manner in which the same is to be
performed may be more readily and clearly understood, we have annexed hereto
the accompanying sheet of drawings, in which
Fig. 1 is an end elevation, Fig. 2 a plan, and Fig. 3 a cross section on line X X
of Fig. 2 of our improved crank shaft bracket.
a is the trough shaped bracket, which is bolted to the shoulder plate b by means
of the flange a cast on the bracket and the bolts c. Each end of the bracket is
provided with a bearing, lettered d and e respectively. The bracket is made
sufficiently long between the bearings to receive the sliding sleeve f and to permit
of it being moved along the shaft as required. The fast and slow crank shaft
pinions g and are attached to opposite ends of the sleeve, or cast in one piece with
the sleeve. The sleeve is mounted on a feather or key on the shaft, or as shewn in
the drawings this portion of the shaft is made square in section; so that the sleeve
and the pinions can be slid longitudinally along the shaft by means of the lever i.
k and jare respectively the fast and slow gear rims of the intermediate wheel 7.
As shewn best in the cross section Fig. 3, and as indicated by the dotted line m,
in Fig. 2, an opening is left in the trough bracket to permit the rims of the
intermediate wheel to project into the bracket so as to gear with the pinions g
and h.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
1. In traction engines and road rollers the use of a bracket a having bearings d
and e at the ends for carrying one side of the crank shaft and provided with a
flange or flanges a' and having the crank shaft pinion or pinions between said
bearings substantially as and for the purpose or purposes set forth.
2. In traction engines and road rollers the use of a bracket attached to the
shoulder plate, having a bearing at each end thereof for carrying one side of the
crank shaft and having the crank shaft pinion or pinions between said bearings
substantially as and for the purpose or purposes set forth.
3. Our improved double bearing crank shaft bracket for traction engines and
road rollers substantially as set forth.
Dated this 12th day of March 1896.
J. CLARK JEFFERSON,
30 Park Row, Leeds, Agent for Applicants.