Year: 1895

page_text: агротеШеню Іп Буцашо-тесто седеганого ани мотото.
I, GEORGE EDENSOR DORMAN of The Hawthorns, Newport Road Stafford,
in the County of Stafford, Inventor, do hereby declare the nature of this invention
to be as follows: :-
The object of my invention is to provide a dynamo or motor involving a
reduction in the weight of copper employed in those machines and armature coils
wound by the lathe or winding machine, the said coils being more easily withdrawn
from, or replaced in the dynamo or motor than heretofore.
My invention consists in employing for the armature a cast iron, steel, or
wrought iron wheel with a central hub and spokes, or a solid flange or disc and a
rim overhanging the hub on either side, the said rim being slotted with slots one
quarter of an inch wide or larger on each side up to the supporting flange, the
said slots being directly opposite one another or breaking joint, and upon this
wheel I bolt with insulated bolts a number of insulated sheet iron strips, the
whole when complete, comprising a deeply slotted sheet iron rimbed wheel, the
same result might be attained by winding insulated sheet iron ribbon on the afore-
said wheel and by afterwards slotting by machine, the ribbon being fastened by
insulated bolts or by an insulated circumferential ring pressed on.
Upon the said wheel and on either side and within the slots I place coils
previously wound and taped or insulated, the coils being segmental or a semi-
circular oblong as the machine is intended to be multipolar or bipolar, the coils
embracing few or many of the slots and being quite flat and being placed one
above another until all the slots are filled, or each contains a coil. I use a
separate commutator of ordinary Gramme type to each side, or the coils on each
side may be connected up together and one commutator only be used, and where
few coils are used I may employ for each side, two segmented commutators of the
split ring type.
As the armature is laminated it is desirable to use a laminated field or fields and
to this end employ circular or oval horse shoe magnets built up of strips of
insulated sheet iron bolted on a cast iron, steel, or wrought iron base, with bolt
holes drilled therein.
I then slip previously wound coils on the field, or the fields, may be wound by
hand and I then bolt the fields magnetically insulated, to supports or rings or
frames attached to the bed plate of the dynamo or motor, the fields being so
situated, that the aforesaid wheel revolves between the poles of the said laminated
horse shoe magnets, a pair of these magnets being used for bipolar machines, and
several for multipolar dynamos or motors.
Dated this 28th day of May 1895. .

page_text: Improvements in Dynamo-electric Generators and Motors.
I, GEORGE EDENSOR DORMAN of The Hawthorns, Newport Road Stafford
in the County of Stafford Inventor, do hereby declare the nature of this inven-
tion and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
The object of any invention is to provide a dynamo or motor involving a
reduction in the weight of copper employed in these machines, and armature coils
wound by the lathe or winding machine, the said coils being more easily withdrawn
from, or replaced in the dynamo or motor than heretofor. My invention consists
in employing for the armature a cast iron, steel or wrought iron wheel with a
central hub and spokes, or a solid flange or disc, and a rim overhanging the hub
on either side, the said rim being slotted with slots a quarter of an inch wide or
larger on each side up to the supporting flange, the said slots being directly
opposite one another or breaking joint, and upon this wheel I bolt with insulated
bolts a number of insulated sheet iron strips, the whole when complete comprising
a deeply slotted sheet iron rimbed wheel, the same result might be attained by
winding insulated sheet iron ribbon on the aforesaid wheel and afterwards slotting
by machine, the ribbon being fastened by insulated bolts or by an insulated
circumferential ring pressed on.
Upon this said wheel and on either side and within the slots I place coils
previously wound and taped or insulated, the coils being segmental or a semi-
circular oblong, the coils embracing few or many of the slots and being quite
flat and being placed one above another untill all the slots are filled. I use a
separate commutator of ordinary Gramme type to each side, or the coils on each
side may be connected up together and one commutator used, and when few coils
are used I may employ for each side two segment commutators of the split ring
type. As the armature is laminated or slotted it is desirable to use a laminated
field or fields and to this end I employ circular or oval horse shoe magnets built
up of strips of insulated sheet iron bolted on a cast iron, steel, or wrought iron
base with bolt holes drilled therein, I then slip previously wound coils on the
field or the fields may be wound by hand and I then bolt the fields magnetically
insulated to supports or rings or frames attached to the bed plate of the dynamo or
motor, the fields being so situated that the aforesaid wheel revolves between the
poles of the said laminated horse shoe magnets, a pair of these magnets being used
for bipolar machines, and several for multipolar dynamos and motors.
F
In the accompanying drawings Fig. 1 shews a front view of an armature
constructed according to this invention, Fig. 2 shews a peripheral view thereof,
A are piles of sheet iron strips bolted to the rim C by studs or bolts B the said
studs being with or without insulation, the strips are shewn slightly bent, they
may be flat, or the bottom strip being flat on its upper side may be curved or
packed at the corners on the lower side. The strips are shewn gradually
increasing in width, there may instead be several of the same width, then a set
wider and so on. Dare the slots for the reception of coils E, any number of coils
may be used, there being on the armature shewn, 16 coils, 8 coils on either side,
the coils being prevented from lateral movement by binding strings, tapes, or
wires T, the said bindings on the periphery, threading beneath the coils from one
side to the other and over the coils, the two sets of coils also being bound together
through the spokes of, or holes in the flange of, the pulley as at T. The coils
may be made sufficiently large to slip over the piles A and into the slots
with ease.
Figs. 3 and 4 illustrate a complete bipolar machine F are rectangular horse
shoe magnets built of sheet iron strips F attached by bolts H to a cast iron steel

page_text: or wrought iron base J. Supporting rings or frames are shewn at K the fields
being bolted thereto by bolts N through insulating pieces O.
Coils on one field are shewn at P.
Figs. 6 and 9 shew another disposition of the fields for bipolar machines only,
in this case. They are bolted to the bed of the machine.
Figs. 10 and 11 shew a field in which the sheet iron strips instead of being
bolted to a cast iron, cast steel, or wrought iron base are simply, fitted tightly,.
into a base of trough section, coils being shewn thereon at R.
Where the slots in the armature are numerous and not excessively wide solid
cast iron, steel, or wrought iron magnets may be used, such a field being shewn
in Figs. 7 and 8, the dotted line Q representing the position of the periphery of
the armature, bolt holes being shewn at S.
In machines as shewn in Fig. 3 and 4, it is evident that any number of fields.
may be used in the rings K, and in some cases the rings or frames K may be made
in segments to facilitate removal.
The rim of the pulley need not necessarily extend to the full width of the strips,.
in such case the strips being supported by a thick strip at bottom, a thick strip
being generally used on the top of each set of strips as at U Fig. 1.
The area of the pole pieces should be within the area of the armature coils for
sparkless operation and the polarity of the fields on either side, north and south:
alternately.
The coils on either side may be connected up to one commutator on the Gramme
system the coils directly opposite on each side being connected as one coil, there
being as many commutator segments as coils on one side, but when the coils or
slots on each side break joint as may be the case when the rim is wound with a
sbeet iron strip afterwards slotted, the coils on each side may form one armature
there being as many commutator segments as coils, a coil on one side being
connected to the nearest one on the other side, with a commutator segment
between the coils. Connections being made through the spokes or holes.
A commutator may always be used to each side, in this case the machine may be.
used as a motor dynamo.
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. In a dynamoelectric generator or motor an armature comprising coils.
placed side by side or one above another in and embracing one or more slots on
one or both sides of the periphery of a wheel substantially as herein described.
and shewn.
2. In a dynamoelectric generator or motor an armature substantially as herein.
described, composed of piles of insulated sheet iron bolted to the periphery of a
wheel as described.
3. In a dynamoelectric generator or motor an armature consisting of sheet iron.
ribbon bolted and slotted on the periphery of a wheel and furnished with coils
substantially as herein described and shewn."
4. In a dynamoelectric generator or motor as described, horse shoe shaped.
field magnets composed of sheet iron strips attached to a base substantially as.
berein described and shewn in Figs. 3 and 4.