W.
HOCHHAUSEN,
Dynamo-Electric Machines.
No. 224,593. Patented Feb. 17, 188O.
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UNITED STATES PATENT OFFICE.
WILLIAM HOCHHAUSEN, OF NEW YORK, N. Y.
DYNAMOELECTRIC MACHINE.
SPECIFICATION forming part of Letters Patent No. 224,593, dated February 17, 1880.
Application filed November 1, 1879.
To all whom it may concern: toward the circumference by one or more
Beitknown that I, WILLIAMEIOCHHAUSEN, blades fastened to the shaft radially. One or SO
of the city of New York, in the county of New more coils, P, Fig. 3, are wound longitudi
York and State of New York, have invented nally around each bar, being held in position
a new and useful Improvement in Dynamo by the projections N, as shown in Fig. 3. All
Electric Machines; and I do hereby declare the ends of one denomination of these coils
the following to be a full, clear, and exact de are coupled together by being attached to a 55
scription of the invention. ring, D, Fig. 2, which is fastened to one of the
In the drawings, Figure 1 represents a end plates, E, Fig. 3, but insulated therefrom.
O front view of my machine. Fig. 2 represents All the ends of the other denominations of
a back view of the same. Fig. 3 represents these coils are fastened each to a segment, F,
an interior side view of the same, and Fig. 4 Fig. 1, of the commutator. The currents from
represents one of the parallel bars of which these coils are collected quantitatively by a
the cylindrical armature is composed. number of brushes, G, Figs. 1 and 3, which
In my machine the field-magnet consists of number is determined by experiment. As
two curved pieces of iron connected at their the coils passing the neutral Zone Would give
ends by two rectangular plates, from which but little current, they are left out of the cir
two other pieces of iron project toward each cuit till they have attained a more pronounced
other, the curved end plates of which form a magnetism.
cylindrical space in which the armature with To enable the operator to set the brushes in
its coils revolves. As in this shape the iron that position where the greatest strength of
surrounds the magnet-coils, the inductive ef. current is obtained, the brush-holder is pro
fect in three directions is utilized, making a vided with a tangent-screw, M, Figs. 1 and 3,
very strong magnetic field in the cylindrical by which it can easily be moved round its full
25 space, but leaving the external iron neutral. crum, but which secures it against all acci
In the drawings, Figs. 1 and 2, the field dental shifting.
magnet is represented by the letters A A' B The circuit in this machine is in the usual 75
B C C, A A' being the yoke, B B the rect way--from binding-post on left side to brush
angular plates connecting the yoke, and C holder, through armature-coils, through oppo
and C the poles. site brush-holder to a magnet-coil, through
This strong magnetism, as shown above, is coil crossing over to the other coil, through
obtained by comparatively a small number of the latter to binding-post on the right side.
convolutions of the conductor forming the The peculiar advantages of this machine
coil, and the latter will therefore have a low are, that its internal resistance is kept very
35 internal resistance. low, that the current is very uniform, and that
The cylindrical armature is composed of a there is very little wear to the commutator and
number of parallel bars, such as are represented brushes on account of the absence of sparks.
by Fig. 4, which are held in position by pro I claim
jections N on the same abutting against the In a dynamo-electric machine, a cylindri.
conical inner side of the rims of two diamag cal armature consisting of a number of par
netic disks, E, Fig. 2, which are fastened to allel bars held in position by projections on
the shaft. These bars are separated from each said bars abutting against the inner conical 90
other by a space for a large part of their length, rim-surface of two diamagnetic plates.
as shown in Fig. 4, through which space a WILLIAM HOCHHAUSEN,
45 strong current of air will be forced, entering
the hollow interior of the armature by large Witnesses:
and numerous perforations, O, Fig. 2, through CHAs. H. KNOX,
the end plates, E, Fig. 3, and being directed HENRY E. WOODWARD,
