IMPROVEMENTS IN THE ORGANS OF DYNAMO, MAGNETO OR ELECTRO-MOTIVE MACHINES AND IN OTHER ELECTRICAL APPARATUS IN THE CONSTRUCTION OF WHICH IRON, CAST IRON, STEEL AND OTHER METALS ARE USED
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by Benjamin Joseph Barnard Mills at
the Office of the Commissioners of Patents on the 30th October 1882.
Communicated to me from abroad by Théophile Chutaux of Paris in the
Republic of France.
BENJAMIN JOSEPH BARNARD MILLS of the firm of Harris and Mills of 23 South-
ampton Buildings in the County of Middlesex, Patent Agent "IMPROVEMENTS IN
THE ORGANS OF DYNAMO, MAGNETO OR ELECTRO-MOTIVE MACHINES AND IN OTHER
ELECTRICAL APPARATUS IN THE CONSTRUCTION OF WHICH IRON, CAST IRON, STEEL
AND OTHER METALS ARE USED." A communication to me from abroad by Théophile
Chutaux of Paris in the Republic of France
The Invention consists of a new arrangement applied to the principal organs
ordinarily used in the construction of electro motors, dynamo or magneto employed
for power or light, and other electrical apparatus.
The organs referred to are called magnets, electro magnets and armatures fixed or
moveable according to requirements. These organs are constructed as is well known
of steel either tempered or not tempered, or of iron or cast iron magnetized or not,
according to their applications; they are of various forms and dimensions and of
different sizes according to the requirements of construction.
The magnetic and dynamic effects produced by means of these organs are generally
more appreciable at the extremities of their poles, south and north, and that under
conditions of limited extent of surfaces in presence which only attain the maximum
effect with slowness, and cannot even attain it, if the apparatus is compelled to
make very rapid rotary or other movements, and in either case, retain remanent
and coercive influence, contrary to the result required to be attained.
This consequence arises from the fact that the organs which communicate or
which receive the magnetic influence only communicate or receive it superficially
without penetration into their mass; that being a matter well known, it was
necessary therefore to discover means to augment the polar surfaces and to assist
the penetration of the effect into the mass of the organs, either in their entire
dimensions or only at the polar part, this is effected by causing certain channelled
angular or other shaped parts of coacting organs to enter considerably into each
other, by overlapping and interfitting or interpenetrating that is the problem
solved by the present invention as will be seen by examining the accompanying
drawings

page_text: From the above there results by reason of the increase of the polar surfaces &
greater quantity of effects, of energy and of penetration of the magnetic phenomena
engendered and interrupted instantaneously according to requirements.
Further, other advantages, for example as in Figures 1 and 2 (the latter showing
a section of the bobbin on the line A, B, of Figure 1) the effects are produced
ordinarily by the exterior parts of the poles of the moveable electro-magnet A,
known as "Siemens' Bobbin " and by the interior surfaces of the cores forming the
poles of the electro magnets fixed between which the moveable bobbin executes its
movement of rotation and produces the effect on C.
It should be remarked that the invention not only enables the surfaces to be
increased by the inter-penetration of certain parts D to facilitate the penetration
of the useful effect, but the inventor takes hold with advantage of the production
of magnetism existing in E, the parts of which are the reverse of those I have just
described;
.but it exists nevertheless and hitherto it has not been utilized.
Figure 3. in which A, is the "Siemens Bobbin" and B, the permanent magnet.
Figures 4 and 5 serve to demonstrate that the new principle is applicable to all
systems of electrical apparatus in which organs are employed known by the
preceding denominations.
In the apparatus shown at Figures 3 and 4 the effects are produced ordinarily
only in C, the present invention takes advantage of the effects produced in E, and
yet without prejudicing the preceding effects