Improvements in Switches for Electric Light Work.
Year: 1892

page_text: Date of Application, 9th May, 1892.
Complete Specification Left, 8th Feb., 1893-Accepted, 29th Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in Switches for Electric Light Work.
We, BERNARD MERVYN DRAKE and JOHN MARSHALL GORHAM Electrical
Engineers both of 66 Victoria Street in the City of Westminster, do hereby declare
the nature of this invention to be as follows:-
The object of our invention is to provide a means by which it is rendered
impossible for the attendant to pass the current in the reverse direction through
the extra cells of the secondary battery. Up to the present these extra cells
have been frequently controlled by a combined charge and discharge regulator and
instructions have been issued that the discharging switch must always be placed
level or at a lower point than the charging switch. In the event of these
instructions being disregarded the current tends to reverse the intermediate cells.
In our improved switch we mount on the spindle of both the charging and
discharging switch, pulleys connected together by a band or arranged in such a
way that the movement of one is imparted to the other. Projections or the
equivalent are arranged on the two pulleys in such a manner that the discharging
switch is left free to move to any point below that occupied by the charging switch
but will move up the charging switch along with itself if farther advanced towards
the end of the battery.
Dated this Seventh day of May 1809
BERNARD MERVYN DRAKE.
JOHN MARSHALL GORHAM.
COMPLETE SPECIFICATION.
Improvements in Switches for Electric Light Work.
We, BERNARD MERVYN DRAKE and JOHN MARSHALL GORHAM, Electrical
Engineers, both of 66 Victoria Street in the City of Westminster, 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:-
The object of our invention is to provide a means by which it is rendered
impossible for the attendant to pass the current in the reverse direction through
the extra cells of the secondary battery. Up to the present these extra cells have
been frequently controlled by a combined charge and discharge regulator and
instructions have been issued that the discharging switch A. must always be placed
level or at a lower point than the charging switch B. In the event of these
instructions being disregarded the current tends to reverse the intermediate cells.
In our improved switch we mount on the spindle of both the charging B and
discharging switch A. pulleys C. C₁ connected together by a band D. or arranged
in such a way that the movement of one is imparted to the other. Projections E. E'
or the equivalent are arranged on the two pulleys in such a manner that the
discharging switch A. is left free to move to any point below that occupied by the
charging switch B but will move up the charging switch B. along with itself if
farther advanced towards the end of the battery.
The pulleys C C (to which the projections E E are attached) move loose on the
spindles.

page_text: Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
The arrangement of coupling the charge and discharge levers of switches to
-enable the movement of one to be imparted to that of the other substantially as,
-and for the purpose described.
.
Dated this 8th day of February 1893
BERNARD) MERVYN DRAKE.
JOHN MARSHALL GORHAM.