Improvements in the Construction of Dynamo Electric Machines.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements in the Construction of Dynamo Electric Machines.
We, MARK HEATON ROBINSON, of Overslade, Rugby, Engineer, and MATTHEW
HENRY PHINEAS RIALL SANKEY, late Captain R.E., of Bawnmore, Bilton, near
Rugby, do hereby declare the nature of this invention to be as follows:-
-
This improvement relates to the construction of the revolving parts of those
dynamo electric machines, in which the revolving parts are coupled directly to
the engine-flywheel or engine coupling, by a circular flange cast upon the spider
or wheel which carries the revolving parts. In such machines it is customary
to mount a cast iron, or cast steel, spider" upon the dynamo shaft, and the
spider," by means of the flange referred to, itself forms the coupling between
the face of the flywheel (or other form of coupling carried by the engine shaft)
and the dynamo shaft; at the end remote from the engine the dynamo shaft is
carried by a bearing.
<<
According to this invention we dispense entirely with the dynamo shaft, by
casting a prolongation upon the spider, which, being accurately turned, serves
as a journal in the bearing referred to; the material for the casting is preferably
steel. This construction is extremely rigid, and is little subject to deformation
either by the magnetic pull of the magnets upon the armature, or by the weight
of the revolving parts. The cost of the dynamo shaft is saved, and also that
of the boring of the central bosses inside the spider (no such bosses being in
fact required), while the truth of the journal at the end of the spider, relatively
to the circumference of the spider and to the facing of the flange referred to,
is not dependent upon the accurate fit of a shaft in the spider bosses. All the
machining of the spider and its bearing, essential to truth in running, can be
performed at one setting in the lathe.
Dated this 22nd day of November 1899
COMPLETE SPECIFICATION.
Improvements in the Construction of Dynamo Electric Machines.
We, MARK HEATON ROBINSON, of Overslade, Rugby, Engineer, and MATTHEW
HENRY PHINEAS RIALL SANKEY, late Captain R.E., of Bawnmore, Bilton, near
Rugby, do hereby declare the nature of this invention, and in what manner the
same is to be performed to be particularly described and ascertained in and by
the following statement:-
This improvement relates to the construction of the revolving parts of those

page_text: is
dynamo electric machines in which the revolving parts are coupled directly to
the engine fly wheel, or engine coupling, by a circular flange cast upon the spider
or wheel which carries the revolving parts. In such machines it is customary
to mount a cast-iron or cast-steel spider" upon the dynamo shaft, and the
spider," by means of the flange referred to, itself forms the coupling between
the face of the fly wheel (or other form of coupling carried by the engine shaft)
and the dynamo shaft. At the end remote from the engine the dynamo shaft
is carried by a bearing.
65
According to this invention we dispense entirely with the dynamo shaft, by
casting a prolongation upon the spider, which, being accurately turned, serves
as a journal in the bearing referred to; the material for the casting is preferably
steel. This construction is extremely rigid, and is little subject to deformation
either by the magnetic pull of the magnets upon the armature, or by the weight
of the revolving parts. The cost of the dynamo shaft is saved, and also that
of the boring of the central bosses inside the spider (no such bosses being in
fact required) while the truth of the journal at the end of the spider, relatively
to the circumference of the spider and to the facing of the flange referred to,
is not dependent upon the accurate fit of a shaft in the spider bosses.
machining of the spider and its bearing, essential to truth in running, can be
performed at one setting in the lathe.
All the
The drawing is a longitudinal section of the revolving parts of a dynamo con-
structed according to this invention.
a is the armature fixed to the "spider" b. c is the motor shaft working in
the bearing d. e is the fly wheel connected to the "spider" b by bolts f. g is
the prolongation of the spider working in the bearing h.
It is obvious that instead of making g as a part of the casting, and therefore
of the same material, it may consist of a piece of steel or other suitable material
placed in the mould so that the remaining portion of the spider may be cast
upon it, the object aimed at being merely to ensure that the spider, and the
projection 9, shall be effectually one structure before the work of machining is
undertaken.
1
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is :-
The spider or boss carrying the revolving part of a dynamo electric machine
substantially as described having a projection 9 at its end in one piece with it
and forming a journal.
1000