Improvements in Electric Machines for Covering Wire.
Year: 1890

page_text: COMPLETE SPECIFICATION.
Improvements in Electric Machines for Covering Wire.
We, JOHN SCOTT, of Court Street, Plymouth, in the County of Plymouth and
State of Massachusetts, United States of America, Designer, and FRANK ELMER
DAVIS, of Main Street, Somerville, in the County of Suffolk and State of Massa-
chusetts, United States of America, Electrical Engineer, do hereby declare the
nature of our invention for "IMPROVEMENTS IN ELECTRIC MACHINES FOR COVERING
WIRE," and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
Our Invention relates to devices for actuating the operative parts of machines for
covering wire or other cores with a thread or other material, and has for its object
the production of a simple, compact and convenient machine which shall be easily
regulated and capable of performing its work with great rapidity and uniformity.
The Invention consists in the arrangement and combination of electrical devices
for actuating the several parts of a covering machine, as hereinafter described and
claimed.
In the drawings:
Fig. 1, is a side elevation of a winder.
Fig. 2, is a transverse section of the same.
Fig. 3, is a diagram of the electrical connections.
Fig. 4, is an enlarged detail view of the switch indicated in Fig. 3.
Fig. 5, is a side elevation of a multiple winder, parts being removed.
Fig. 6, is an end elevation of the same with parts shown in dotted lines, and
Fig. 7, is a diagram of certain electrical connections to be referred to.
The single winder represented in Figs. 1 and 2 consists, briefly, of the two
covering or winding heads B B and the winding or feed drum E, supported on a
suitable frame A. The two winding heads are alike and a description of one will
suffice for both. Upon the frame is secured an electric motor D, having the usual
armature B, field coils B2 and field magnets B³, and generally of usual construction
save that the shaft is hollow to permit the passage there through of the wire or
other core to be covered. Secured to the end of the hollow shaft is the flier C,
which may be of any convenient construction, adapted to support a spool of the
covering material upon a hollow spindle within the detachable yoke 6. By thus
placing the flier upon the end of the hollow shaft of an electric motor, we are enabled
to dispense with all external driving gear and intermediate connections, to drive the
flier at high speed, and to obtain certain other desirable results hereinafter
referred to.
Upon the flier and normally held from contact therewith by the thread in its
passage through the eyes and 12, is insulatingly secured a spring contact point p,
which is connected through connection o³, insulated ring o³ and conductor of with a
generator K and magnet L, connections being also made from said magnet to the
flier or its shaft through the conductor o' and its contact point resting on the shaft,
as indicated in Figs. 1 and 7. It will be seen that by this arrangement the keeper of
the magnet L will be attracted upon the breaking or failure of the covering thread,
for a purpose presently to be described.
The winding or feed drum E, which draws the wire through the machine, is driven
from one of the motors by a gear f¹ on the shaft thereof which meshes with a gear fª¯
upon a shaft F, which in turn drives the drum through the worm f and worm
wheel e.
The current is conducted from the dynamo, or other generator, to the motors by
the wires h, h, in which a switch or cut out G, is interposed for use when it is
desired to cut out the machine entirely. From the switch G, the current is carried

page_text: through the field coils B, through the usual resistances M, by which the motors may
be adjusted to the same speed, by the circuit h², h³. As shown, the field magnets of
the two motors are arranged in multiple are, but, if desired, they may be in series,
in which case but one set of resistances M will be needed.
The current is carried to both the armatures of the two motors by the circuit ², h³,
which, as clearly appears, is separate from the field magnet circuit. As here shown,
the armatures of the two motors are in multiple arc. They may. if desired, be in
series. In the circuit 2, 3, are interposed certain devices for regulating and shutting
down the motors, which will now be described. The wire 12, as shown, passes
directly to the armature, but in the course of the wire, 13, is interposed a contact
plate in the form of an are of a circle, in contact with which rests one end of a
switch lover P pivoted at p, the other end of said lever resting normally upon the
continuation of said wire ³, and the lever thus forming a bridge over the break in
said wire. The lever is subject to the action of a spring 01 but is restrained from
movement until the thread fails or it is desired to slow down the motors by a
latch 02, which is the keeper of the magnet L above referred to. In order that the
lever P may not move too rapidly when released, we have connected thereto a con-
trolling device 0, which is shown as a dash-pot of usual construction. In the path
of the end of the lever is a series of resistances X1 X2 X³, having their contact
blocks separated by a space less than the width of the contact face of the lever.
Another resistance X4, is provided having its contact blocks separated from the
contact block of the last resistance X³, by
a space greater than the width of the
contact face of the lever. When the one end of the lever P is on the contact
block of resistance X, the other end will rest upon a contact block Q formed on the
wire h².
The operation of the above described devices is as follows: The upper end of the
switch lever P, when released, is thrown by the spring O¹ towards the left, bringing
its end successively in contact with the contact blocks of the resistances X1, X2, X3,
its lower end remaining in contact with the arc R. The effect of this movement is
gradually to increase the resistance of the armature circuit and thereby reduce the
speed of the motor. The further movement of the switch lever P moves the upper
end of the lever off from the contact blocks of resistance X and at the same time
moves the lower end of the lever off from the arc R thus breaking the circuit. The
final movement of lever P brings its upper end on to the contact block of
resistance X, and at the same time brings its lower end on to the contact block Q
and closes the armature circuit on the resistances X1, X2, X³, X. It will be clear
from this description that the action of the switch lever when released is to
successively insert resistances in the armature circuit break the circuit and short
circuit the armatures on resistance. The resistance X, on which the armatures are
short circuited may, if desired, be separate from the resistances X1, X2, X³, which are
inserted in the circuit.
By arranging both the armatures in the same circuit, their rotation at the same
speed is secured. If one armature tends to rur faster than the other, the first will
become practically a generator to the second ari supply it with current to accelerate
its speed, at the same time the extra effort exhausting its tendency to run faster.
will be observed that the field coils are unchanged in the ordinary operation of the
machine, the switch G being used only when the whole machine is to be put out
of use.
It
It is evident that the arrangement of devices above described for a single winder
can be applied to a multiple winder by building. many armatures into one piece of
iron which, having the field coils formed about it, constitutes the field magnets for
the armatures. Thus all the work of inspection and management may be brought into
a narrow compass and the capacity of a workman greatly increased without inter-
fering in any degree with the complete independence of each machine. A series of
armatures is arranged, as shown, between the parts of each of the multiple pole
pieces B*.
These
up of several pieces.
pole pieces may be formed in one piece or may be made
multiple these Pultiple pole pieces are wound the field coils B³,

page_text: there being a number of these coils on each half of each multiple pole piece corre-
sponding to the number of armatures; all the coils of both multiple pole pieces are
preferably in the same circuit either in series or in multiple arc, and the circuit of
the coils is separate from the armature circuit. The circuits in the multiple machine
are the same as in the single machine and are equally well represented by Fig. 3
in which B2, B3, may be taken as representing the series of coils of the multiple pole
pieces. The armature circuit as shown in this view, includes two armatures only, to
wit, the corresponding armatures in the two pole pieces, and there are as many armature
circuits as there are pairs of armatures. Each armature circuit is provided with the
switch shown in Fig. 4, which has been fully described and each of the fliers carried
by the armatures is provided with a spring contact point p in circuit with the electro
magnet L, etc., as in the single machine. Each pair of armatures being provided
with the same stopping mechanism throughout that is used in the single machine, but
the stopping devices of each pair are entirely distinct from that of every other pair.
These devices being mere duplications of that shown we have not considered it
necessary to illustrate them further.
The only difference in the circuits of the multiple machine and those of a number
of single machines is that, as has been before stated the coils of the multiple pole pieces
are all in the same circuit, so that in the multiple machine we have one circuit
including all the coils of the multiple pole pieces, and as many armature circuits
as there are pairs of armatures.
The feed drums E in the multiple machine correspond in number to the pairs of
armatures and each feed drum is driven as in the single winder, from one of the
corresponding motors. We have shown the covered wire or core as passing around
the feed drum E and thence to a reel E' which is driven frictionally from the feed
drum, as by pulley el, e³, and belt e².
It will be understood that the number of the armatures may be varie as
desired. Usually but two for each wire will be used but any number may be used.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:
1. An electric motor having a hollow armature shaft for the passage of the
material operated on, in combination with devices carried by the armature shaft
adapted for operating on such material.
2. An electric motor having a hollow armature shaft for the passage of the core,
and a flier carried by the armature shaft adapted to wind covering material on the
core, in combination with a winding drum and mechanism operated by the motor to
actuate the winding drum to draw the core through the hollow armature shaft.
3. An electric motor having a hollow armature shaft for the passage of the core
and a flier carried by the armature shaft for winding covering material on the core,
in combination with devices for shutting down the motor and devices adapted to be
actuated by the failure of the covering material for releasing said first named
devices.
4. An electric motor having a hollow armature shaft for the passage of the
material operated on, and devices carried by the armature shaft adapted to operate
on the material as it passes through the armature shaft, the armature and field coils
of the motor being on separate circuits, in combination with a switch in the armature
circuits, and automatic means for operating the switch to successively insert resistances
in the circuit, break the circuit and short circuit the armature.
5. An electric motor having a hollow armature shaft for the passage of a core,
the armaturo being provided with a flier for winding covering material on the core,
the armature and the field coils of the motor being arranged in separate circuits, in
combination with a switch in the armature circuit, a spring for operating the switch
to successively insert resistances in the circuit, break the circuit, and short circuit
the armature, a catch engaging the switch, an electro-magnet arranged to operate the
catch, and devices carried by the flier in engagement with the covering material and

page_text: in circuit with the electro-magnet, whereby on failure of the covering material the
electro-magnet is actuated to operate the catch and release the switch.
6. An electric motor having a hollow armature shaft for the passage of a core,
and a flier carried by the armature shaft for winding covering material on the core,
the armature and the field coils of the motor being on separate circuits, and a switch
in the armature circuit, automatic means for operating the switch to successively
insert resistances in the circuit, break the circuit, and short circuit the armature,
in combination with a winding drum adapted to draw the coil through the hollow
armature shaft and mechanism operated by the moter to attuate the drum.
7. A plurality of electric motors each having a hollow armature shaft for the
passage of a core, each armature shaft carrying a flier for winding covering material
on the core, the field coils of all of the motors being in a single circuit, and the
armatures being all in a single circuit separate from the field magnet circnit.
8. A plurality of electric motors, each having a hollow armature shaft for the
passage of the material operated on, each armature shaft carrying devices for operating
on the material as it passes through the hollow armature shift, the field coils of all the
motors being in a single circuit and the armatures being all in a single circuit
separate from the field magnet circuit in combination with a switch in the armature
circuit and means for operating the switch to successively insert resistances in the
armature circuit, break the circuit through the armatures and shortcircuit the armatures.
9. A plurality of electric motors having all their armatures in the same circuit
in combination with a switch in said circuit and means for operating the switch
to successively insert resistances in the circuit, break the circuit and short circuit the
armatures.
10. A plurality of electric motors having all their armatures in the same circuit,
in combination with a switch in said circuit, automatic means for operating the switch
to successively insert resistances in the circuit, break the circuit, and short circuit the
armatures and automatic means for releasing the switch to permit it to be operated by
said first named means.
11. A plurality of electric motors having all their armatures in the same circuit
in combination with a switch in said circuit, a spring for operating the switch to
successively insert resistances in the circuit, break the circuit, and short circuit the
armatures, a catch engaging the switch lever and an electro magnet arranged to
operate the catch to release the switch lever.
12. A plurality of electric motors each having a hollow armature shaft for the
passage of a core, each armature shaft carrying a flier for winding covering material
on the core, the armatures of all the motors being arranged in a single circuit, a
switch in the armature circuit a spring for operating the switch to successively insert
resistances in the circuit, break the circuit and short circuit the armatures, a catch
engaging the switch lever, an electro-magnet arranged to operate the catch and
devices carried by the fliers in engagement with the covering material and in circuit
with the electro-magnet, whereby on failure of the covering material the electro-
magnet is actuated to operate the catch and release the switch lever.
13. A multiple pole piece arranged to receive a plurality of armatures, in combination
with armatures each having a hollow shaft provided with a flier.
14. A multiple pole piece arranged to receive a plurality of armatures and having
a plurality of field coils thereon, in combination with armatures each having a hollow
shaft provided with a flier, the several coils of the multiple pole piece being all in the
same circuit, and the armatures being each in a circuit separate from the field circuit
and from the other armature circuits.
15. A multiple pole piece arranged to receive a plurality of armatures and having
a plurality of field coils thereon, in combination with armatures each having a hollow
shaft provided with a flier, the several coils of the multiple pole piece being all in the
Same circuit, and the armatures being each in a circuit separate from the field circuit
and from the other armature circuits, and a switch in each of the armature circuits
and automatic means for actuating each switch to successively insert resistance in the
circuits, break the circuit, and short circuit the armature.

page_text: 16. Two or more multiple pole pieces each arranged to receive a plurality of
armatures, and each having a plurality of field coils thereon, in combination with
armatures having hollow shafts and carrying fliers, the several coils of the several
multiple pole pieces being all in the same circuit, and each armature in one multiple
pole piece and the corresponding armature in the other multiple pole pieces being
in a circuit separate from the field circuit and from the other armature circuits.
17. Two or more multiple pole pieces each arranged to receive a plurality of
armatures, and having a plurality of field coils thereon, in combination with
armatures having hollow shafts and carrying fliers the several coils of the several
multiple pole pieces being all in the same circuit, and each armature in one multiple
pole piece, and the corresponding armatures in the other multiple pole piece being
in a circuit separate from the field circuit and from the other armature circuits
and a switch in each of the separate armature circuits, and automatic means for
operating each switch to successively insert resistances in the circuit, break the circuit
and short circuit the armatures.
CA
וי
1000
JOHN SCOTT.
FRANK ELMER DAVIS.
Hughes, Eli & Hughes,
76, Chancery Lane, London, W.O., Agents for the Applicants.