A Method of Relieving Shaft Bearings from Weight or Thrust, and Apparatus for that Purpose.
Year: 1893

page_text: Date of Application, 30th Aug., 1893
Complete Specification Left, 30th May, 1894-Accepted, 30th June, 1894
PROVISIONAL SPECIFICATION.
A Method of Relieving Shaft Bearings from Weight or Thrust, and
Apparatus for that Purpose.
I, FRANCIS EDWARD ELMORE, of Oulton Green, Oulton, in the County of
York, Electrometallurgist, do hereby declare the nature of this invention to be as
follows:-
My invention relates to means of relieving the bearings of revolving shafts from
weight or thrust.
I effect relief of a shaft bearing by subjecting the iron or steel shaft near its
bearing to the attraction of an electro magnet or solenoid provided with means of
adjusting the exciting current, so as to relieve the bearing of more or less of the
weight of the shaft, or it may be to take more than the weight, giving a certain
amount of pressure against the cap of the bearing. When there is thrust against
the bearing, it may be similarly relieved by the attraction of a solenoid surrounding
any part of the shaft.
In case of the shaft of an electro motor subject to thrust resulting from worm
gear which it works, it is of advantage to wind the coil of the relieving solenoid in
series with coils of the motor so that the relieving attraction may be proportioned
to the thrust produced by the force of the motor.
The lifting effect may be obtained by winding the wire on the shaft and properly
disposing armatures through which the lines of force must pass when the shaft is
magnetised by passing a current through the winding.
Dated this 30th day of August 1893.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
A Method of Relieving Shaft Bearings from Weight or Thrust, and
Apparatus for that Purpose.
I, FRANCIS EDWARD ELMORE, of Oulton Green, Oulton, in the County of
York, Electrometallurgist, 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 :-
My invention relates to means of relieving the bearings of revolving shafts from
weight or thrust.
I effect relief of a shaft bearing by subjecting the iron or steel shaft near its
bearing to the attraction of an electro magnet or solenoid provided with means of
adjusting the exciting current, so as to relieve the bearing of more or less of the
weight of the shaft, or it may be to take more than the weight giving a certain
amount of pressure against the cap of the bearing.
Fig. 1 of the accompanying drawings is a side view and Fig. 2 is an end view of
an arrangement for this purpose.
An electromagnet E is supported on a pair of arched bearings B of non magnetic
material over the iron or steel shaft S attracting it upwards.
According to a modification shewn in Fig. 3 the shaft S is excited by currents
through a coil surrounding the shaft so that it acts as an electro magnet attracted
upwards to an iron or steel piece M.
[Price 8d I

page_text: When there is thrust against the bearing, it may be similarly relieved by the
attraction of a solenoid surrounding any part of the shaft.
Fig. 4 is a section shewing an arrangement for this purpose. An iron or steel
boss C fixed on the shaft is attracted towards a circular electro magnet F excited
by a current through a coil sunk in a groove of F.
In case of the shaft of an electro motor subject to thrust resulting from worm
gear which it works, it is of advantage to wind the coil of the relieving solenoid in
series with coils of the motor so that the relieving attraction may be proportioned
to the thrust produced by the force of the motor.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The herein described method of relieving shaft bearings from weight or thrust
by subjecting the shaft to magnetic attraction in opposition to the direction in which
the weight or thrust acts.
2. In combination with a horizontal shaft, an electromagnet supported above it
substantially as described with reference to Figs. 1 and 2, or the modified arrange-
ment in which the shaft itself is made to constitute the electro magnet, substantially
as described with reference to Fig. 3.
3. In combination with a shaft subject to thrust and a boss of magnetic metal
thereon, a circular magnet attracting the boss in opposition to the thrust,
substantially as described with reference to Fig. 4.
Dated this 30th day of May 1894.
ABEL & IMRAY,
Agents for the Applicant.