Improvements in Electric Driving Mechanisms for Geared Machines Generally.
Year: 1899

page_text: Date of Application, 18th Dec., 199
Complete Specification Left, 8th Sept., 1900-Accepted, 8th Dec., 1900
PROVISIONAL SPECIFICATION.
Improvements in Electric Driving Mechanisms for Geared Machines
Generally.
I, FREDERICK SAMUEL CARTER, of 69, Cyprus Street, Stretford, in the County
of Lancaster, Mechanical and Electrical Engineer, do hereby declare the nature
of this invention to be as follows:-
This invention relates to improvements in electric driving mechanisms for
geared machines generally, such as cranes, winding machinery, hoists, calenders,
printing machines, tramcars, and the like.
Hitherto where machinery such as aforesaid has been electrically driven the
motor has formed a part separate from the machinery and has been geared up
to it by means of spur or screw gearing, belts or ropes.
The object of this invention is to form, in the class of machinery aforesaid
where the armature of the motor revolves, the field magnets of the electric motor
a part of the gearing or the armature a part of the gearing in motors where the
field magnets revolve, thereby dispensing with a great number of parts, con-
sequently greatly reducing the cost of the machine and also minimizing the
space required considerably.
The
In applying my invention say to a crane, hoist or winding machine I make
the barrel or drum thereof so as also to form the yoke of the field magnets of
the motor. This yoke is provided with the magnet limbs which may form either
a part of the casting or be secured thereto by means of bolts or screws.
ends of the said barrel or drum are formed with tubular shafts on which it
revolves, the said shafts running in bearings of the ordinary form, or roller
bearings may be used as found most suitable, which bearings are fixed to the
framework of the machine.
Both of the said ends may be secured to the barrel or drum by means of bolts,
or one of the same may be cast therewith and the other only secured by bolts.
The armature employed may be of the ordinary construction and its shaft runs in
bearings that are formed in the hollow shafts of the said barrel or drum.
On one end of the armature shaft, I secure a pinion, which gears with a wheel
fixed on an intermediate shaft that runs in bearings also fixed on the frame-
work of the machine. I pon the other end of the last named shaft is fixed
nother spur pinion which gears with a spur wheel fixed upon the said barrel or
drum shaft, which barrel or drum also forms the magnet yoke.
This spur wheel may be an internal one if it is necessary to get a great reduc-
tion in speed. When using an internal wheel, the magnets revolve in the
opposite direction to the armature and their relative movement being thereby
ncreased a greater amount of purchase is obtained.
In lieu of spur gearing I may use screw gearing, belts or ropes as may be
ound most convenient.
Although my invention is particularly applicable to cranes, hoists and winding
machines, I may also apply it to tramcars and other vehicles and to machines

page_text: generally where a reduction of speed is required, the mechanism described
and constituting my improvements remaining practically the same, the revolving
yoke however would not be as beneficial as in cranes and the like machines, but
there would be a considerable saving in the amount of space occupied.
In lieu of the gearing described I may use for some purposes in connection
with my improvements epicycloidal gearing combined as follows:-
The yoke of the field magnets forms the arm for the train of wheels, the
intermediate shaft running in bearings forming a part of the yoke casting. The
wheel which in the former arrangement is fixed on to the yoke, in this case
will be rigidly fixed to the framework carrying the yoke and armature.
The wheel or pinion fixed to the armature shaft, gears with a wheel on the said
intermediate shaft, on the other end of which is keyed another wheel or pinion
which gears with the wheel rigidly fixed to the framework carrying the motor, the
said intermediate shaft running in bearings being fixed to the yoke drives it
slowly round.
Upon the end of the yoke shaft I may fix a wheel that can be geared up to the
machinery to be driven.
Dated this 16th day of December 1899.
F. BOSSHARDT & Co.,
Agents to Applicant.
COMPLETE SPECIFICATION.
Improvements in Electric Driving Mechanisms for Geared Machines
Generally.
I, FREDERICK SAMUEL CARTER, of 69, Cyprus Street, Stretford, in the County
of Lancaster, Mechanical and Electrical Engineer, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particu-
larly described and ascertained in and by the following statement:
This invention relates to improvements in electric driving mechanisms for
geared machines generally, such as cranes, winding machinery, hoists, calenders,
printing machines, tramcars and the like.
Hitherto where machinery such as aforesaid has been electrically driven, the
motor has formed a part separate from the machinery and has been geared up to
it by means of spur or screw gearing, belts or ropes.
The object of this invention is to form, in the class of machinery aforesaid
where the armature of the motor revolves, the field magnets of the electric motor
a part of the gearing or the armature a part of the gearing in motors where the
field magnets revolve, thereby dispensing with a great number of parts, con-
sequently greatly reducing the cost of the machine and also minimizing the
space required considerably.
And in order that my invention may be more fully understood I have caused
to be appended hereunto two sheets of drawings, marked with letters of refer-
ence indicating like parts in the various figures, showing in longitudinal section
two of the uses of my improved electric driving mechanism.
In carrying out and applying my invention, for instance to a crane, hoist,
winding machine or the like, Fig. 1, I make the barrel or drum a thereof so as
also to form the yoke of the field magnets 6 of the motor. This yoke is provided
with the magnet limbs e which may form either a part of the barrel cr drum a
as in the present instance, or be secured thereto by means of bolts or screws as
will be readily understood. The ends of the said barrel or drum are formed
with hollow shafts d on which it revolves, the said shafts running in bearings e

page_text: of the ordinary form, or roller bearings may be used as found most suitable.
The said bearings are either formed on or are fixed to the framework f of the
machine.
Both of the said shaft ends may be secured to the barrel or drum a by means
of bolts or studs g as in the present instance, or one of the same may be cast
therewith and the other only secured by bolts. The armature h employed may
be of the ordinary construction and its shaft h¹ run in bearings i formed in the
hollow shafts d of the barrel or drum a.
On one end of the armature shaft h', I secure a pinion which gears with a
wheel fixed on an intermediate shaft m that runs in bearings n also formed or
fixed on the framework f of the machine. Upon the other end of the shaft m
is fixed another spur pinion o which gears with a spur wheel p fixed upon the
respective barrel or drum shaft d.
The spur wheel 7 may be an internal one if it is necessary to get a greater
reduction in speed. When using an internal wheel, the drum a and the
magnets 6 revolve in the opposite direction to the armature h and their relative
movement being thereby increased, a greater amount of purchase is obtained.
The current supplying the motor is conveyed to the armature h by means of
collectors s and is collected by the commutator r by means of brushes of the
usual construction. The current supplying the magnets b is conveyed thereto
by means of a collector s¹, which is connected to the magnet windings by a
suitable insulated conductor and from the magnet windings to one of the col-
lectors s which is of opposite polarity in a motor that is only required to run in
one direction.
When the motor is required to reverse, it would be necessary to have two
collectors of opposite polarity to supply the magnets.
In lieu of the spur gearing described, I may use screw gearing, belts or ropes
as may be found most convenient and will be readily understood without
illustration.
Although my invention is particularly applicable to cranes, hoists and winding
machines, I may also apply it to tramcars and other vehicles and to machinery
generally where a great reduction of speed is required, the mechanism described
and constituting my improvements remaining practically the same, the revolving
yoke however would not be as beneficial as in cranes and the like machines,
but there would be a considerable saving in the amount of space occupied.
For the last named uses and for machines generally where a very great
reduction of speed is required, I may in some cases employ, in lieu of the gear-
ing just described, epicycloidal gearing combined, as shown in Fig. 2. In this
case the ends of the barrel or drum a forming the yoke of the field magnets b
serve as arms for the support of the intermediate shafts m of the train of wheels,
which shafts run in bearings n formed on the ends of the said yoke. The
wheel p which in the former arrangement is fixed on to the yoke, in this case
and when the bearing e is part of the framework f, will be rigidly fixed to the
latter or when the bearing e is made adjustable, the wheel 2 must be fixed to
the bearing itself.
The wheel or pinion & fixed to the armature shaft h¹ gears with wheels or
pinions on the intermediate shafts m, on the other ends of which are keyed
other wheels or pinions o which gear with the wheel rigidly fixed to the
framework carrying the motor or the bearing e, the said intermediate shafts
running in bearings n forming part of, or fixed to the yoke and rotating there-
with drives the armature slowly round.
In lieu of employing two intermediate shafts m I may employ only one, the
former arrangement being however preferable as it balances the yoke or barrel a
of the motor which is of great importance as in most cases this yoke would run
at a very high speed.
The current supplying the motor in this case is conveyed to the armature h
by means of collectors which may be fixed on the periphery of the barrel a and

page_text: collected in the usual way by the commutator r. The current supplying the
magnets could also be conveyed thereto by means of a similar collector fixed
on the barrel a, Fig. 2.
In case of a vehicle, I secure both wheels t upon the armature shaft h¹ or I
may fix thereon a wheel or wheels that can be geared up to the machinery to
be driven, or again I may secure to one or both ends of the armature shaft h¹
a half coupling so as to allow of it being inserted in and coupled up with shaft-
ing as will be readily understood without special illustration.
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
1st. An electric driving mechanism for geared machinery generally, con-
structed, applied and operating substantially as described and illustrated in
annexed drawings.
2nd. An electric driving mechanism having the magnets of the motor forming
part of the gearing in motors where formerly the armature revolved or the
armature a part of the gearing in motors where formerly the magnets only
revolved, all substantially as and for the purpose set forth.
3rd. In an electric driving mechanism such as specified in the preceding
claim, the use of epicycloidal gearing in the manner and substantially as
described and illustrated in annexed drawings.
Dated this 7th day of September 1900.
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester,
Agents to Applicant.