Mounting Electrical Dynamo Machines or Motors to enable them to be Easily Reversed for Driving in Alternate Directions.
Year: 1891

page_text: Date of Application, 25th Mar., 1891
Complete Specification Left, 28th Dec., 1891-Accepted, 30th Jan., 1892
PROVISIONAL SPECIFICATION.
Mounting Electrical Dynamo Machines or Motors to enable them to
be Easily Reversed for Driving in Alternate Directions.
I, RICHARD ROBERT HARPER, of Sash Court, Wilson Street, Finsbury, in the
County of London, Electrical Engineer, do hereby declare the nature of this
invention to be as follows:-
This invention has for object ;-
1. To increase the life of a dynamo or motor.
2. To improve its working conabilities
3. To lessen the wear of the commutator portion and of the bearings.
4. To improve the light and make it steady and regular if in connection with
lighting apparatus.
For the purpose of my invention, I pivot or mount the dynamo or motor with its
support upon a bed plate, or foundation, so that it can be slewed round, end for
end, for effecting a reverse rotation without altering the direction of travel of the
driving belt, and this I accomplish by arranging the axis or pivot directly under
the wheel of the dynamo, or motor on which the belt acts. Any system of locking
the dynamo, or motor in either position can be adopted.
Dated this 5th dan of Monch 1901
3. To lessen the wear of the commutator portion and of the bearings.
4. To improve the light and make it steady and regular if in connection with
lighting apparatus.
For the purpose of my invention, I pivot or mount the dynamo or motor with its
support upon a bed plate, or foundation, so that it can be slewed round, end for
end, for effecting a reverse rotation without altering the direction of travel of the
driving belt, and this I accomplish by arranging the axis or pivot directly under
the wheel of the dynamo, or motor on which the belt acts. Any system of locking
the dynamo, or motor in either position can be adopted.
Dated this 5th dor of March 1901
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Richard Robert Harper.
COMPLETE SPECIFICATION.
Mounting Electrical Dynamo Machines or Motors to enable them to
be Easily Reversed for Driving in Alternate Directions.
I, RICHARD ROBERT HARPER, of Sash Court, Wilson Street, Finsbury, in the
County of London, Electrical Engineer, 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 invention has for object;-
1. To increase the life of a dynamo or motor.
2. To improve its working capabilities.
3. To lessen the wear of the commutator portion and of the bearings.
4. To improve the light and make it steady and regular if in connection with
lighting apparatus.
For the purpose of my invention, I pivot or mount the dynamo or motor with its
support upon a bed plate or foundation, so that it can be slewed round, end for
end, for effecting a reverse rotation without altering the direction of travel of the
driving belt, and this I accomplish by arranging the axis or pivot directly under
the wheel of the dynamo or motor, on which the belt acts. Any system of locking
the dynamo or motor in either position can be adopted.
My invention will be understood by the annexed drawings.
Figure 1 is a plan elevation of a dynamo in full lines and pivotted at one end to
a foundation for being slewed round or end for end on the bed plate, as in dotted
lines.
Figure 2 front elevation of dynamo and bed plate.
A is the pivot or bolt, to which the dynamo or motor frame B is pivotted by
the wing C, this being directly under the axis of the driving pulley D of the

page_text: The other wing F of the dynamo has a slot with a bolt G passing through it
into a hole of the foundation H for fixing the dynamo in a firm position after
adjustment.
I purpose making the foundation H semi circular, as at Figure 1, and provide
each end with a series of holes I, J, for the bolt G in order that the dynamo can
be set to the required angle at which overhead shafting may be placed.
To render the dynamo. capable of adjustment parallely beneath an overhead
shaft, I provide a slot K in the bed plate H in which the pivot bolt or pin A can
be adjusted, or be set back to obtain the necessary tightness of the driving belt, by
which the pulley D may be driven. The pivot pin A for this purpose, is connected
to a block or crosshead sliding in a box or bearings in the bed plate, said block
being movable by a screw when the head L is turned.
It will be understood that by slipping the driving belt endwise off the pulley D,
and by slewing the dynamo round on its pivot A to the position shown in dotted
lines at Figure 1, the pulley will remain in exactly the same position but reversed
end for end, so that the belt can again be slipped on, and the running of the
dynamo continued but in an opposite direction of travel.
By this means, I improve the working capabilities of the dynamo, and cause the
bearings to wear more evenly. It also improves the current producing properties
of the dynamo, especially if used for lighting purposes. The wear of the
commutator portion is also lessened.
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. So pivotting a dynamo or motor that it can be turned end for end without
shifting the position of the driving pulley, as described and substantially as
indicated by the annexed drawings.
2. Mounting a dynamo machine, or electrical motor to enable the same to be
easily reversed for driving in alternate directions, as set forth.
The 4th day of December 1801
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Richard Robert Harper.
H. GARDNER,
Patent Agent, 166, Fleet Street, London,
Agent for the said Richard Robert Harper.