IMPROVED ELECTRIC OR MAGNETIC MOTOR
Year: 1882

page_text: LETTERS PATENT to Thomas Morgan, of 21, Cockspur Street, Charing Cross,
in the County of Middlesex, Engineer and Patent Agent, an Invention of
"IMPROVED ELECTRIC OR MAGNETIC MOTOR." A communication from abroad
by John Clement Cuff, of Singapore, and Walter Judd, of Penang, Straits
Settlements
PROVISIONAL SPECIFICATION left by the said Thomas Morgan, at the Office
of the Commissioners of Patents on the 3rd February 1882
"
THOMAS MORGAN of 21 Cuckspur Street, Charing Cross in, the. County of
Middlesex, Engineer and Patent Agent. IMPROVED ELECTRIC. OR. MAGNETIC
MOTOR." (A communication from abroad by John Clement, Cuff of Singapore, and
Walter Judd of Penang, Straits Settlements.),
This Invention is for the purpose of supplying a simple motor for those. purposes
which require a reciprocating movement, without, employing any crank or rotary
motion to produce it.-Such for instance as pulling a punkah, working a churn or
a pump, etc.-The Invention is carried into effect mainly as follows:
":
To two (more or less), long bars of iron are attached several pole pieces, also of
iron. These bars are wound with wire, so as to produce electro magnets with
several consequent poles of alternate polarity.-Between these poles, is a long
sliding piece, built up as follows:-To a bar of brass or other diamagnetic substance,
is attached an electro magnet, with its poles arranged so that they may, slide. very
near to the con-equent poles of the fixed magnets-Next to this electro magnet is.
a piece of brass or other diamagnetic substance, then another similar magnet, so
arranged that its poles are not opposite to the fixed poles at the same time as the
first sliding magnet. Then follows another bar of brass or other diamagnetic
substance, so arranged as to form like the first mentioned bar, something similar to.
a piston rod. These two bars slide in bearings. One, two, three or more magnets.
may be arranged in the way above described to slide between the row of fixed
poles. Above the fixed magnets are placed two long pieces of vulcanite, which
bear blocks of brass, to act as commutators, so as to convey, and roverse the current
-

page_text: in the magnets as required. These act in connection with springs, which are
attached to a piece of vulcanite borne by the sliding bar above its magnets.-In a
motor with two sliding magnets, there will be three pairs of springs, one pair to
each sliding magnet, to reverse its polarity just as its poles arrive opposite to the
fixed poles, and one pair to bring into circuit only that portion of the coils on the
fixed magnets which are at the time in the neighbourhood of the sliding magnets.―-
In cases where the pull is only required in one direction, arrangements can be
made to cut the current entirely off when the sliding magnets arrive at one end of
their range, and is re-established when the swing of the punkah or other machine
has carried them back again.-In this way, the electricity is economized as it is
only used at that time when the pull is required whereas in a rotary motor, the
current is on during nearly the whole revolution, though it is only useful during
one quarter. To facilitate the action of the punkah, we prefer to apply to the
rope an elastic piece or spring, which serves as a kind of cushion in the to and fro
action of the punkah.

page_text: Fig. 4 plan of bar with sliding piece and magnets.
Fig. 5 section of end piece. We arrange two (more or less) long bars of iron M'
M M M and attach to them several pole pieces P P P also of iron.
The bars are wound with wire so as to produce electro magnets with several
consequent poles of alternate polarity.
Between these poles is a sliding piece C built up as follows:-A bar of brass or
other diamagnetic substance to which is attached by universal or suitable joint an
electro magnet M³ with its poles arranged so that they may slide very near to the
consequent poles of the fixed magnets M1 M2 M3 M4. Next to this magnet is a
piece of brass or other diamagnetic substance B" then another similar magnet or
magnets so arranged that its poles are not opposite to the fixed poles at the same
time as the first sliding magnet. To the magnets at extreme ends are attached
rollers R R free to move to facilitate the backward and forward motion and reduce
friction when in action. Or a bar of a diamagnetic metal is fixed to the sliding
piece at each end running in bearings somewhat similar to a piston rod. When
rollers are used only one rod or bar is used which is attached as before described
by universal or other joint to the magnet M. One, two, three or more magnets
may be arranged in the way described to slide between the rows of fixed poles.-
Immediately above the fixed magnets we place two pieces of vulcanite V which
bear blocks of brass B' to act as commutators so as to convey and reverse the
current in the magnets as required.-These act in connection with springs S which
are attached to a piece of vulcanite V₁ borne by the sliding bar C above its
magnets. In a motor with two sliding magnets there will be three pairs of springs
one pair to each sliding magnet to reverse its polarity just as its poles arrive
opposite and in advance to the fixed poles and one pair to bring into circuit only
that portion of the coils on the fixed magnets which are at the time in the
neighbourhood of the sliding magnet. In those cases where the pull or push is
only required in one direction we arrange that the circuit is cut entirely off when
the sliding magnets arrive at one end of their range and is re-established when the
swing of the punkah or other machine has carried them back to the beginning or
near to it again-In this way we economize the electric current and it is only used
at that time when the pull or push is required whereas in a rotary motor the
current is on during nearly the whole revolution, though it is only useful during
one quarter. To facilitate the action of the punkah, we prefer to apply to the rope
an elastic piece or spring which serves as a kind of cushion in the to and fro action
of the punkah.
"

page_text: Having now particularly described and ascertained the nature of the said Inven-
tion, and in what manner same is to be performed or carried out in practice, I claim
the Invention of "Improved Electric or Magnetic Motor" substantially as herein-
before set forth and described and illustrated by the accompanying Drawings.
In witness whereof I the said Thomas Morgan have hereunto set my hand
and seal this Third day of August One thousand eight hundred and eighty
two.