Improvements relating to the Mounting of Dynamo Electric Machines.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements relating to the Mounting of Dynamo Electric
Machines.
We, P. R. JACKSON & Co., LTD., and JOSEPH SLATER LEWIS, both of Salford
Rolling Mills, Manchester, in the County of Lancaster, Engineers, do hereby
declare the nature of this invention to be as follows:-
Our invention relates to the mounting of dynamo electric machines, and is
more especially intended for use in those cases where the machines, either
generators or motors, are direct coupled to prime movers, or to pumps and the like,
or to other dynamos.
Hitherto it has been customary when coupling dynamos direct to mount them
upon the same bed plate as the engine, or if this was not convenient to mount the
dynamo upon a separate bed plate secured upon the floor in a suitable manner.
According to our invention we dispense with the dynamo bed plate and support
the field magnets and the pedestals for the armature bearings separately and inde-
pendently upon iron rails laid in the concrete floor, to which rails the bed plate
of the prime mover is secured. Where the dynamo is direct coupled to a second
dynamo the second machine may be mounted in the same manner as the first.
In order that the nature of our invention may be clearly understood we will
proceed to describe one method of carrying out the same in practice in the case
where a dynamo is to be coupled direct to a steam engine for example. Wo
provide two rails preferably flanged at their bases, laid in concrete which forms
the floor of the room, said rails being arranged so as to project a suitable distance
above the floor level. Between the rails at that part where the engine is to be
secured we generally place a third rail to act as an additional support in case
the engine should need extra support. The dynamo will of course be placed with
its shaft parallel with the rails, and the pedestals supporting said shaft are secured
to bridge pieces which are grooved on their under sides to fit the supporting rails,
being provided with suitable bolts for securing the same in proper position on
said rails. The field magnet of the dynamo are provided with a base wide enough
to rest upon the rails, and are also grooved to approximately fit the same. It will
be seen that in ordinary cases the fixed parts of the dynamo will be in three pieces
each independently secured to the supporting fails, said pieces consisting of two
pedestal pieces and the field magnets.
By this arrangement we are enabled to dispense with the ordinary dynamo bed
plate, and we also find that the adjustment and erection of the various parts in
position is very considerably facilitated. The bed plate of the engine is secured
to the supporting rails in any suitable manner, but it will be seen that by the use
of our invention the alignment of the engine or the prime mover and dynamo
may be adjusted with great precision, and the parts secured to the foundation
with the greatest possible solidity and stiffness. We can with this arrangement
erect the rails, and make good the flooring to same, before the mountings are placed
in position. It also provides a clear space underneath the mountings, thus

page_text: improving the ventilation of the parts and preventing accumulations of oil and
filth, and affording great facilities for cleansing.
Where two dynamo machines require to be direct coupled each will of course be
mounted upon the rails in the same manner.
W. P. THOMPSON & Co.,
Patent Agents for the Applicants,
322, High Holborn, London, W.C.
Improvements relating to the Mounting of Dynamo Electric
Machines.
We, P. R. JACKSON & Co., LTD., and JOSEPII SLATER LEWIS, both of Salford
Rolling Mills, Manchester, in the County of Lancaster, Engineers, 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:--
Our invention relates to the mounting of dynamo electric machines, and is
more especially intended for use in those cases where the machines, either
generators or motors, are direct coupled to prime movers, or to pumps and the like,
or to other dynamos.
Hitherto it has been customary when coupling dynamos direct to mount them
upon the same bed plate as the engine, or if this was not convenient to mount the
dynamo upon a separate bed plate secured upon the floor in a suitable manner.
According to our invention we dispense with the dynamo bed plate and support
the field magnets and the pedestals for the armature bearings separately and inde-
pendently upon iron rails laid in the concrete floor, to which rails the bed plate
of the prime mover is secured. Where the dynamo is direct coupled to a second.
dynamo the second machine may be mounted in the same manner as the first.
In order that the nature of our invention may be clearly understood we will
proceed to describe one method of carrying out the same in practice.
In the accompanying drawings;
Figure 1 is a side elevation and
Figure 2 an end elevation shewing a dynamo coupled direct to a steam engine
mounted in our improved manner.
A and B are two rails flanged at their bases, laid in concrete C which forms the
floor of the room, said rails being arranged so as to project a suitable distance
above the floor level, as shewn. The pedestals DE supporting the dynamo shaft
are secured to bridge pieces or bearers D' E which are grooved on their under
sides as shewn at D2, Figure 2, to fit the supporting rails A and B being provided
with suitable bolts indicated at D3 E3, for securing the same in proper position
on said rails. Between the pedestals and the projecting pieces we interpose
packing pieces F of zinc or other suitable non-magnetic metal, in order to prevent
magnetic leakage, and the bolts for securing the various portions of the dynamo
to the rails are also made of brass, or gun-metal, or phosphor-bronze, for similar
reasons. The field magnet G of the dynamo is secured to a non-magnetic metal
piece H which is wide enough to rest upon the rails A and B and is also grooved
to approximately fit the same. Or the field magnet base is made wide enough
to rest on the rails and non-magnetic metal packing pieces interposed between it
and the rails. It will be seen therefore that the fixed parts of the dynamo are
in three pieces, each independently secured to the supporting rails, said pieces
consisting of two pedestal pieces and the field magnets.

page_text: By this arrangement we are enabled to dispense with the ordinary dynamo bed
plate, and we also find that the adjustment and erection of the various parts is
very considerably facilitated. The bed plate of the engine indicated at J in the
drawings, is secured to the supporting rails A and B in any suitable manner
and between the rails under the engine we generally place a third rail not shewn
in the drawings, to act as an additional support in case such should be needed.
It will be seen that by the use of our invention the alignment of the engine
or prime mover or dynamo may be adjusted with great precision and the parts
secured to the foundation with the greatest possible solidity and stiffness.
can with this arrangement erect the rails and make good the flooring to same,
before the engine and dynamo or other parts are placed in position. It also
provides a clear space underneath the mountings, thus improving the ventilation
of the parts and preventing accumulation of oil and filth, and affording great
facilities for cleansing.
We
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;-
1. The arrangements for mounting dynamos and the like substantially as shewn
and described.
2. In the mounting of dynamos and the like, a bridge piece or bearer such
as resting on rails or girders laid in concrete parallel with the dynamo shaft,
the tops of said rails being clear of the floor, substantially as and for the purpose
specified.
Dated the Seventh day of October 1898.