An Electric Locomotive for Combined Adhesion and Rack. Traction.
Year: 1894

page_text: Date of Application, 13th Feb., 1894
Complete Specification Left, 8th Dec., 1894-Accepted, 19th Jan., 1895
[Communicated from abroad by FRANCIS RINECKER, of Wurzburg, in the
German Empire, Civil Engineer..]
An Electric Locomotive for Combined Adhesion and Rack. Traction.
1, JOHN IMRAY, of No. 28 Southampton Buildings, Chancery Lane, in the
County of London, Consulting Engineer and Chartered Patent Agent, do hereby
leclare the nature of this invention to be as follows:-
:—
In some railways, especially those which have steep gradients, locomotives are
employed having ordinary adhesion wheels which drive on the more level portions
of the line, and pinions which gear with racks laid on the steep portions of the line,
the mechanism being usually so arranged that either the adhesion wheels drive
alone, or they drive in conjunction with the pinions.
This invention relates to means of effecting the traction in such cases by
electricity. For this purpose, from.a conductor laid along the line, or, from storage
batteries on the locomotive, electrical currents are applied to drive an electro.motor
the armature of which can be connected by suitable gear and clutches to either the
axle or axles of the adhesion wheels alone, or to both these and the pinion axle or
axles; or there may be two separate electro motors the one for driving the adhesion
wheels and the other for driving the pinions. The locomotive mechanism may be
on a vehicle, or there may be a separate locomotive carrying the mechanism and
coupled to a vehicle or train of vehicles.
בד
יו.
101
TL
1904
ABEL & IMRAY,.
Agents for the Applicant..
An Electric Locomotive for Combined Adhesion and Rack Traction.
:
I, JOHN IMRAY, of No. 28 Southampton Buildings, Chancery. Lane, in the
County of London, Consulting Engineer and Chartered Patent Agent, 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:-
In some railways, especially those which have steep gradients, locomotives are
employed having ordinary adhesion wheels which drive on the more level portions
of the line, and pinions which gear with racks laid on the steep portions of the line,
the mechanism being usually so arranged that either the adhesion wheels drive
alone, or they drive in conjunction with the pinions.
This invention relates to means of effecting the traction in such cases by
electricity. For this purpose, from a conductor laid along the line, or from storage
batteries on the locomotive, electrical currents are applied to drive an electro motor
the armature of which can be connected by suitable gear and clutches to either the
axle or axles of the adhesion wheels alone, or to both these and the pinion axle or
axles; or there may be two separate electro motors the one for driving the adhesion

page_text: wheels and the other for driving the pinions. The locomotive mechanism may be
on a vehicle, or there may be a separate locomotive carrying the mechanism and
coupled to a vehicle or train of vehicles.
The accompanying drawings shew examples of electrical driving gear for loco-
motives suited for combined adhesion and rack traction.
As shewn in Fig. 1, which is a side view, a single electro motor A drives by
chain gear the axle of one of the pairs of adhesion wheels B B' and also one of the
axles of the rack pinions CC. For this purpose a pair of sprocket wheels are
provided on the armature shaft of the motor A with suitable clutches, preferably
friction clutches, by which either or both of the sprocket wheels can be engaged
with or disengaged from the shaft. One of these sprocket wheels drives by a chain
a sprocket wheel on the axle of the adhesion wheels B, the other drives a
proportional sprocket wheel on the axle of the rack pinion C. The wheels B
and B are preferably connected by external cranks and side rods; the two
pinions C C may also be connected by cranks and connecting rods, or it might be
by an intermediate pinion.
As shewn in Fig. 2, one electric motor A is arranged to drive directly the pair
of adhesion wheels B which may be connected with the other pairs B' B² by cranks
and side rods; and their motor or pair of motors on the shaft A¹ is arranged to
drive directly a pinion D intermediate to the two rack pinions C C¹.
As shewn in Fig. 3, one electric motor A has on its armature shaft cranks coupled
by side rods to cranks on the adhesion wheels B, B1 B2; another electric motor A¹
has cranks coupled by connecting rods to cranks on the axles of the two rack
pinions C C¹, there being in each case for each pinion as also for each pair of adhesion
wheels a crank on the one side of the vehicle, and a crank at right angles to it on
the other side of the vehicle, with corresponding pairs of cranks on the armature
shafts of the motors. In this case the motors are so arranged that their field
magnets have a yoke Y common to both.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim in respect of electric locomotives for adhesion and rack traction is:-
1. Driving gear consisting of a single electric motor working by sprocket wheels
clutched on its armature shaft and chains therefrom a sprocket wheel on one of the
adhesion wheel axles, and a sprocket wheel on one of the rack pinion axles,
substantially as described with reference to Fig. 1.
2. Driving gear consisting of one electric motor directly driving one of the
adhesion wheel axles, and another electric motor or pair thereof directly driving an
intermediate pinion gearing with the rack pinions, substantially as described with
reference to Fig. 2.
3. Driving gear consisting of one electric motor driving by cranks and connecting
rods the axles of the adhesion wheels, and another electric motor driving also by
cranks and connecting rods the axles of the rack pinions, substantially as described
with reference to Fig. 3.
בד
1
100
ABEL & IMRAY,
Agents for the Applicant.