Improved Method of Winding Coils for Continuous Current Dynamo and Motor Electric Machines.
Year: 1899

page_text: Date of Application, 26th June, 1893
Complete Specification Left, 26th Mar., 1900-Accepted, 12th May,
1900
597
Improved Method of Winding Coils for Continuous Current Dynamo
and Motor Electric Machines.
ARTHUR WILLIAM TOMKINS, 15, Tennyson Street, Bootle, Liverpool, Electrician,
do hereby declare the nature of this invention to be as follows:-
a, slot for holding
dd are buttons
The coil can be wound in a lathe, or by hand Fig. 1.
starting wire which passes along groove b, and round pins 6, c.
with nuts for holding wire in place while winding, ee are clips let into board
having holes tapped for screws which go through holes in ff and screwed
together to hold coil when finished f f are not on board while winding, g g are
holes for screwing board to lathe or bench. Fig. 2, as wound on Fig. 1. i is
starting finishing wire is put in vice with to left hand bent toward and i
bent backward, is then put in vice and bent same as and h, Fig. 2 should be
taped before bending.
Fig. 3 block for shaping, Fig. 4.
starting wire
finishing wire.
Improved Method of Winding Coils for Continuous Current Dynamo.
and Motor Electric Machines.
I, ARTIIUR WILLIAM TOMKINS, late of 15, Tennyson Street, Bootle, Liverpool;
in the County of Lancaster, now of 31, Alton Road, Tuebrook, aforesaid, Elec-
trician, 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:-
This invention relates to an improved method of winding coils for continuous
current dynamos and motor electric machines the object being to accomplish
the winding in a much more simple and quicker manner than has hitherto been
the case and thus economise both labour and time.
In carrying out my invention I use very simple yet novel apparatus which is
shown in the accompanying drawing,
Fig. 1 being a perspective view of the apparatus on which the wire is wound.
Fig. 2 a plan of a coil taken from the apparatus shown in Fig. 1, and
Fig. 3 a perspective view of the block or device in which the coil is bent to
the shape of the drum on which it is to be placed. Of course it will be under-

page_text: stood that the detail of construction of the apparatus may be departed from
without affecting the character of the invention.
Referring to Fig. 1 a is a board or plate which may be secured to a bench
or for heavy winding the face plate of a lathe as may he found more convenient.
This board is provided with two pins stud projections or the like 6 both of
which may be fixed to the board or either of them be made adjustable so that
the distance between their centres may be altered to suit the length of the coil
it is required to make. This may be done by having holes drilled in the board
or the studs may be attached to a screw which would move them apart. The
board a is further provided with recesses in which are placed loosely the
bottom plates d of a pair of clamps. These plates are tapped and the corre
sponding top plates have clearance holes in them through which screws e are
passed for forcing the plates together and so holding the coil of wire after it
has been wound on the pins.
To wind a coil I first bend the starting end of the wife round a slot f in the
board and thence pass it along a groove g and round the studs 6 as many times
as may be required. Pins h. passed through studs hold the wire in position
during winding. This being done the top plates of the clamps are placed in
position and the coil secured by them. The latter is then lifted off the studs b
and bound with tape or other insulating material.
To bend the coils to the shape of the drum on which they are to be placed I use
a kind of vice or clamp such as shown in Fig. 3 and which consists of two
halves capable of being drawn together by a screw j and wing nut k or the
like. The upper ends of the halves are formed to the shape required, the
clamp is slightly opened and one end of the coil placed in the slit 7, and the
clamp tightened. One portion of the coil is then bent in one direction so as
to conform to the block and the other in the opposite direction for a like object.
The coil is then turned end for end and the operation repeated. The illustration
Fig. 3 shows one end bent to shape of clamp. It will thus be seen that the
operation of making coils is very simple.
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. The method of winding coils for the purpose referred to consisting in
winding the wire round pins fixed to a board or bench, securing the wire together
by clamps, removing the coil from the board whilst in the clamps, taping the
coil and thence bending to shape in a vice clamp or block substantially as
described.
2. Apparatus for use in connection with the method referred to in Claim 1
constructed and arranged substantially as described with reference to the accom-
panying drawings.
Dated this 22nd day of March 1900.
WILLIAM H. TAYLOR,
Stephens Buildings, 62, Market Street, Manchester,
Agent for the Applicant.