ELECTRICAL MOTOR
Year: 1883

page_text: PROVISIONAL SPECIFICATION left by William Peek at the Office of the
Commissioners of Patents on the 5th June 1883.
WILLIAM PEEK of Sydenham Hill in the County of Surrey, Gentleman,
IMPROVED ELECTRICAL MOTOR
"
" AN
The object of this invention is to obtain rotary motion from an arrangement of
Electro magnets, by actual contact of the magnets, with a minimum amount of
friction.
To effect this, a disc of brass or other suitable material, or a series of radial arms,
with or without a rim, is to be fitted to or cast with a central boss of steel or other
hard metal, which may be either spherical or hemispherical in shape. On the disc,
rim, or radial arms Electro-magnets are fastened in such positions that when
energised by an Electric current they shall attract or be attracted by iron or
corresponding magnets or solenoids arranged on a fixed frame in juxtaposition to
them.
The disc rotates on the boss against a flattened cone, the sides of which are at
an obtuse angle to each other; the apex of the cone is depressed or cut out to form
a socket in which the boss rotates. The boss is so far sunk into the socket as to
permit the magnets in the disc rim or radial arms to touch and roll upon the iron
or magnets in the cone.
An arm is attached to the centre of the boss at right angles to the disc, and as
the disc rotates in contact with the face of the cone, the arm will move round in a
circle; and being secured to a crank or disc on an axle will cause the axle to rotate
with it: A number of electro-magnets fixed on the disc, with their poles opposite
to a number of electro magnets fixed in the cone, or opposite to armatures of steel
or iron, will attract or be attracted when excited by a galvanic or electric current.
By means of a commutator the magnets may be excited in succession slightly in
advance of the position at which the disc, (or the series of magnets fixed upon it,)
touches the base of the cone, or the magnets fixed therein or thereon; the con-
nection with the exciting battery or Dynamo being cut off at the moment contact
is actually made. The result of this action will be that, as long as the magnets are
excited, the disc must rotate, the pull of the magnets being in advance of the point
of contact, which point of contact acts for the time being as a fulcrum.
The disc and cone may be set vertically, or horizontally, or at an angle; if set

page_text: horizontally the disc or cone may be made a bed plate; the centre boss may be on
either the disc or the cone, and the socket to receive it on the other of them, or
instead of a disc and a cone there may be two cones whose sides are at different
angles, or two discs. The magnets may be fixed on the disc or the cone, or both,
and if there be two cones or two discs on both or either of them, or magnets may
be fixed on one only and iron or steel armatures on the other, and either disc, or
cone or either of two cones or two discs may act as an armature. The disc or the
cone may be fixed or movable or both may be movable, but that either the one or
the other be fixed is preferable. Instead of one arm proceeding from the centre to
turn the plate or crank, two or more arms or plates projecting from other parts of
the working disc or cone may be used; the boss in the centre may be a ball not
fixed, but rotating freely. Instead of the ball or boss in the centre, universal joints
or other means may be used to keep the disc or discs or the cone or cones in
position. The ball, boss, or socket need not be in the same plane with either the
dise or the cone, though preferred.
As the cones or discs are most effective at their circumferences for giving the
combined rocking and rolling motion to the shaft, their inner portions may be cut
away, except so far as is necessary to maintain their connection with the shaft.
The construction to produce the rocking and rolling motion of the shaft may be
varied by having two sets of magnets, or a set of magnets and a set of armatures,
arranged in circular form, one set being of greater diameter than the other and
fixed, the other attached to the shaft. As the smaller set can only touch the larger
at one point and the pull of the magnets is continually changing and advancing,
the set attached to the shaft must roll round and turn the shaft with it.