Year: 1886

page_text: Essex do hereby declare the nature of this invention to be as follows:--
My invention relates to improved apparatus for generating currents of electricity
by means of dynamo electric machines combined with suitable engines, the latter
being worked by steam, compressed air, gas, or by hydraulic power.
These motive engines which may include all classes of reciprocating or rotary
engines, turbines &c., I hereafter call the engine. The dynamo electric machine I
hereafter call the dynamo.
My invention relates more particularly to those forms of combined apparatus in
which the revolving armature of the dynamo is connected in a direct manner to the
revolving shaft of the engine so as to revolve with it.
The object of my invention is to avoid the necessity which has hitherto existed of
manufacturing the engine and the dynamo each separately and afterwards combining
them on one bed plate. This arrangement necessitates the coupling up to the 2 shafts
by various forms of couplings, some rigid and some elastic, which have always given
trouble. It also entails considerable weight and complication, and consequently heavy
first cost.
In my improvements I dispense altogether with the separate bed plate or frame
work for the dynamo machine. I also dispense with the separate shaft or spindle with
its bearings, but in place of this, secure my revolving armature as a whole, to one end.
of the engine shaft in such manner that it acts as a fly wheel to the latter. I make the
framework or bed plate of my engine of such form that I can secure the field
magnets of my dynamo to it without interfering in any way with the efficiency of
the magnetic field produced by these field magnets.
In one form of my invention I mount my armature which I prefer to make of a
dise or short cylinder form on a central hub formed of a casting or forging or suitable
piece bored out so as to fit accurately to the projecting end of the engine shaft on
which it can be secured so as to revolve with it by means of suitable keys, conical

page_text: wedges or other well known mechanical arrangement. I so shape this hub that the
revolving armature overhangs as little as possible the outer end of the engine shaft
bearing. I also make it carry not only the armature core and its winding but the
commutator and all other parts required to revolve with the armature all securely and
solidly mounted on it and attached to it so that when the fastenings which secure the
hub to the engine shaft are set loose, the armature can be conveniently removed from
the shaft or replaced on it as a complete whole. I sometimes make this hub of a
single casting or forging of a suitable non-magnetiseable metal so that part of it
forms the centre of the armature. I sometimes bore-out and bush the cross bar which
carries the collecting brushes in such manner that it can be mounted on a pin or
turned part projecting from the engine shafting outside the commutator thus this pin
although free to revolve within the cross bar, supports it in such position that it can
be moved through any are concentric with the surface of the commutator. I fix the
cross bar in the required position by means of a projecting arm being attached to the
field magnets or other fixed part of the dynamo. In some cases I mount my
collecting brushes on a ring or on segmental pieces arranged so that the brushes can
be moved as before through segmental paths, concentric to the surfaces of the
revolving commutator. I form my field magneis for the above described armatures
with one, two or more pairs of poles according to the size and general requirements
of the machine. I carry these field magnets on projecting brackets on arms which
may be partly or wholly of gun metal or other non-magnetiseable material, these
brackets or arms can form part of or be secured to that end of the engine bed plate
or frame through which passes the shaft carrying the armature. For convenience of
lubricating that bearing of the engine shaft which is next to the armature, 1 sometimes
arrange that the lubrication shall enter continuously from the engine end of the
bearing, circulate to the outer end and back again along a portion of the exterior of
the engine bearing the lubrication being prevented from escaping on to the armature
by means of an adjustable gland or packing ring mounted on the outside of the
engine bearing.
I sometimes form the central casting with a funnel shaped hood or sleeve projecting
inwards towards the engine bearing, but outside it so that if any lubrication should
escape it will be caught by this hood & thrown back towards the engine. In both
cases I avoid the danger of the lubricating material escaping along the shaft and
being thrown by the revolving armature on to the field magnets or on to the
commutator.
In some cases I do not bore out the hub casting but make it solid and provide it
with a flange or suitable coupling at the side next the engine so that it can be
conveniently coupled on to the same; and in some cases I arrange this coupling so
that a disc or washer or ring of insulating material is interposed between the engine
shaft and the dynamo hub. I sometimes insulate the revolving hub from the engine
spindle by suitably forming the 2 ends of the hub so that the whole armature is carried
on insulated washers in the manner which is now well known to electrical engineers
for supporting the segments of commutators on their bushes.
In some cases I so arrange the field magnets that that part of the engine bed plate
or frame next to the armature can act as the yoke of these field magnets.
It will be obvious that in place of using the above described combinations as means
of generating electric currents, they can be equally used as a means of obtaining
motive power from a current of electricity for the purpose of pumping fluids,
compressing air or driving any machinery requiring a bed plate sufficiently substantial
to form the required supports for the field magnets.
Dated this 25th day of May 1884
WM. BROOKES & SON,
55 & 56, Chancery Lane, London,
Agents for the said Rookes Evelyn Bell Crompton.

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus for Generating Currents of Electricity
and in Electro Motors.
I ROOKES EVELYN BELL CROMPTON, Engineer, of the Are Works Chelmsford
Essex 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:
My invention relates to improved apparatus for generating currents of electricity
by means of dynamo electric machines combined with suitable engines, the latter
being worked by steam, compressed air, gas, or by hydraulic power.
These motive engines which may include all classes of reciprocating or rotary
engines, turbines, etcetera, I hereafter call the engine. The dynamo electric machine
Thereafter call the dynamo. .
My invention relates more particularly to those forms of combined apparatus in
which the revolving armature of the dynamo is connected in a direct manner to the
revolving shaft of the engine so as to revolve with it.
The object of my invention is to avoid the necessity which has hitherto existed of
manufacturing the engine and the dynamo each separately and afterwards combining
them on one bed plate. This arrangement necessitates the coupling up to the 2 shafts
by various forms of couplings, some rigid and some elastic, which have always given
trouble. It also entails considerable weight and complication, and consequently heavy
first cost.
In my improvements I dispense altogether with the separate bed plate or frame
work for the dynamo machine. I also dispense with the separate shaft or spindle
with its bearings, but in place of this secure my revolving armature as a whole, to
one end of the engine shaft in such manner that it acts as a fly wheel to the latter, I
make the frame work or bed plate of my engine of such form that I can secure the
field magnets of my dynamo to it without interfering in any way with the efficiency
of the magnetic field produced by these field magnets.
In one form of my invention I mount my armature which I prefer to make of a
disc or short cylinder form on a central hub formed of a casting or forging or suitable
piece bored out so as to fit accurately to the projecting end of the engine shaft on
which it can be secured so as to revolve with it by means of suitable keys, conical
wedges or other well known mechanical arrangement. I so shape this hub that the
revolving armature overhangs as little as possible the outer end of the engine shaft.
bearing. I also make.it carry not only the armature core and its winding but the
commutator and all other parts required to revolve with the armature all securely and
solidly mounted on it and attached to it so that when the fastenings which secure the
hub to the engine shaft are set loose, the armature can be conveniently removed from
the shaft or replaced on it as a complete whole. I sometimes make this hub of a
single casting or forging of a suitable non-magnetisable metal so that part of it

page_text: forms the centre of the armature. I sometimes bore out and bush the cross bar
which carries the collecting brushes in such manner that it can be mounted on a pin
or turned part projecting from the engine shafting outside the commutator thus this
pin although free to revolve within the cross bar, supports it in such position that it
can be moved through any are concentric with the surface of the cominutator. I fix 5
the cross bar in the required position by means of a projecting arin being attached to
the field magnets or other fixed part of the dynamo. In some cases I mount my
collecting brushes on a ring-or on segmental pieces arranged so that the brushes can.
be moved as before through segmental paths concentric to the surfaces of the revolving
commutator. I form my field magnets for the above described armatures, with one,
two or more pairs of poles according to the size and general requirements of the
machine. I carry these field magnets on projecting brackets on arms which may be
partly or wholly of gun metal or other non-magnetisable material, these brackets or
arms can form part of or be secured to that end of the engine bed plate or frame
through which passes the shaft carrying the armature. For convenience of lubricating
that bearing of the engine shaft which is next to the armature, I sometimes arrange that
the lubrication shall enter continuously from the engine end of the bearing, circulate to
the outer end and back again along a portion of the exterior of the engine bearing;
the lubrication being prevented from escaping on to the armature by means of an
adjustable gland or packing ring mounted on the outside of the engine bearing. I
sometimes form the central casting with a funnel shaped hood or sleeve projecting
inwards towards the engine bearing, but outside it so that if any lubrication should
escape it will be caught by this hood and thrown back towards the engine. In both
cases I avoid the danger of the lubricating material escaping along the shaft and
being thrown by the revolving armature on to the field magnets or on to the
commutator.
In some cases I do not bore out the hub casting but make it solid and provide it
with a flange or suitable coupling at the side next the engine so that it can be
conveniently coupled on to the same; and in some cases I arrange this coupling so.
that a disc or washer or ring of insulating material is interposed between the engine
shaft and the dynamo hub. I sometimes insulate the revolving hub from the engine
spindle by suitably forming the 2 ends of the hub so that the whole armature is
carried on insulated washers in the manner which is now well known to electrical
engineers for supporting the segments of commutators on their bushes.
In some cases I so arrange the field magnets that that part of the engine bed plate
or frame next to the armature can act as the yoke of these field magnets.
It will be obvious that in place of using the above described combinations as
means of generating electric currents, they can be equally used as a means of
obtaining motive power from a current of electricity for the purpose of pumping
fluids, compressing air or driving any machinery requiring a bed plate sufficiently
substantial to form the required supports for the field magnets.
According to a practical arrangement of my invention the dynamo is so arranged
is to make it and the engine virtually into one machine. The field magnets of the
dynamo are supported by the engine, being rigidly attached to it, and one of the
shaft bearings of the engine is so arranged as to serve as bearing for the armature
also.
DESCRIPTION OF THE DRAWINGS.
In the accompanying drawings a dynamo according to my invention is shown
arranged to form an attachment to a Willans direct acting engine. Figure 1 is an
.end view, and Figure 2 a side elevation and part section. c is the shaft of the engine k
and it is carried through so as to form the spindle of the dynamo, carrying the
armature h. and commutator a. The armature is supported by a spider which is
keyed on the shaft. The bearing d in which the shaft e runs is made long so that the
arinature is strongly supported. In order to get the armature well over the bearing
the spider is overhung as shewn.. The shaft is stuffed at e, the packing being
tightened by the gland which is made as shewn so that the flange is accessible for

page_text: tightening. The field magnets ii are supported by the brackets and which attach
them rigidly to the engine. bare the brush holder rods. The brushes are not
shewn.
My invention is also applicable to dynamos driven by turbines, and to motors
driving fans or other machinery in which a compact and efficient combination can be
made by arranging the dynamo or motor on an overhung bearing after the manner
described.
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 :—
1. In apparatus for generating currents of electricity the combination or arrange-
ment and use of a dynamo electric machine with an engine so as to be driven direct
by an engine or turbine arranged without a separate bed plate or separate bearings
for the dynamo in manner substantially as described and shewn in the drawings.
2. In apparatus for generating currents of electricity the combination or arrange-
ment and use of an electric dynamo machine with the engine driving it; the dynamo
having its armature mounted on the shaft of the engine or turbine having a bearing
common to both the electro dynamo machine and the engine driving it substantially
as shewn and described.
3. The combination or arrangement of parts of an electro motor so as to effect the
driving of a machine directly said machine being arranged with a bearing common to
the electro motor and machine substantially as described.
1
1 1
WM. BROOKES & SON.
55 & 56, Chancery Lane, London,
Agents for the Applicant.