Improvements. in Portable Electric Primary Batteries, and in their application to Miners' and' like Portable Lamps.
Year: 1893

page_text: Date of Application, 16th Mar., 1893
Complete Specification Left; 18th Dec., 1893-Accepted, 27th Jan., 1894
PROVISIONAL SPECIFICATION.
Improvements. in Portable Electric Primary Batteries, and in their
application to Miners' and' like Portable Lamps.
We, MARY PERRY TUCKERMAN, of 3 Heron Court, Richmond in the County
of Surrey, Gentlewoman, and ALFRED DOUGLAS MACKENZIE, Engineer, of
180 Wardour Street, in the County of Middlesex, do hereby declare the nature of
this invention to be as follows :-
Our invention relates to improvements in portable electric primary batteries and
in their application to miners and like portable lamps.
It is particularly desirable in portable batteries that their construction be such
that the liquid shall not escape or affect the connections when the battery is carried
about or otherwise disturbed and it is to attain this end that our improvements are
directed.
We will describe the same in connection with a portable minors lamp from which
their adaptation to other forms of portable batteries will be readily understood.
Inside the battery is formed a ledge flush with the top of the cells and of the
divisions between them, and on this seats a plate carrying the carbons and zincs a
sheet of rubber being preferably interposed between the parts to make a tight joint.
The upper part of the case is provided with an internal screw thread into which
screws a cover carrying the lamp and connections. This cover may be of some
suitable metal to which the lamp or other connections are attached the necessary
insulation or separation of parts being made by means of an annular ring of
insulating material or the cover may be of insulating material and carry rings of
metal to which the connections are attached. To make a connection between this
cover and the plate carrying the carbons and zincs we employ two spring terminals
upon which the metal rings or the like on the cover press when the latter is
screwed in place.
The zincs which are carried by the plate closing the cells being the electrodes
which are more rapidly worn away are provided with screw threads so that they
may be rapidly attached to and removed from the plates as is now the case with-n
form of battery at present made but we find it convenient instead of screwing
these directly into the plate as heretofore proposed to screw them into a metal cap
which fits over the top of a short piece of ebonite tube (inside which the zinc
hangs) and screws onto a brass ring outside of same with which brass ring connection
may be made with the next cell. A rubber disc is preferably placed inside this
cap before the zino is screwed into same. With this method of, removeably attaching
the zines in a primary battery a single opening only is needed in the cover plate
through which when the latter is not removeable the solution may be poured and
removed, the ebonite lining preventing the liquid corroding the screw.
Dated this 16th day of March 1893.
PHILIP M. JUSTICE,
55 & 56, Chancery Lane, London, Chartered Patent Agent.

page_text: COMPLETE DIDUIFICATION.
Improvements in Portable Electric Primary Batteries, and in their
application to Miners' and like Portable Lamps.
We, MARY PERRY TUCKERMAN, of 3 Heron Court, Richmond, in the County
of Surrey, Gentlewoman, and ALFRED DOUGLAS MACKENZIE, Engineer, of
180 Wardour Street, in tho County of Middlesex, 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 improvements in portable electric primary batteries and
in their application to miners and like portable lamps.
It is particularly desirable in portable batteries that their construction be such
that the liquid shall not escape or affect the connections when the battery is carried
about or otherwise disturbed and it is to attain this end that our improvements are
directed.
We will describe the same in connection with a portable lamp from which their
adaptation to other forms of portable batteries will be readily understood.
In the accompanying drawings-
Fig. 1 is a sectional elevation of a portable lamp adapted for the use of minera
and for other purposes.
Fig. 2 is a plan of the cover looking from beneath and
Fig. 3 is a plan of the cells with the cover removed.
Inside the battery case a is formed a ledge & flush with the top of the cells and of
the divisions between them; and on this seats a plate c carrying the carbons d and
zincs e a sheet of rubber f being preferably interposed between the parts to make a
tight joint. The upper part of the case is provided with an internal screw thread g
into which screws a cover h carrying the lamp and connections. This cover may
be of some suitable metal and carry metal rings i'i as shown to which the lamp or
other connections are attached the necessary insulation or separation of the rings
being made by securing them to a sheet or ring of insulating material or the
cover may be of insulating material and carry rings of metal to which the
connections are attached. To make a connection between this cover / and
the plate c carrying the carbons and zincs we employ two spring terminals k k upon
which the metal rings ii or the like on the cover press when the latter is screwed
in place.
.
The zincs e which are carried by the plate closing the cells being the electrodes
which are more rapidly worn away are provided with screw threads so that they
may be rapidly attached to and removed from the plates as is now the case with a
form of battery at present made but we find it convenient instead of screwing these
directly into the plate e as heretofore proposed to screw them into a metal cap m
which fits over the top of a short piece of ebonite tube n (inside which the zinc
hangs) and screws onto a brass ring o outside of same with which brass ring
connection may be made with the carbon of the next cell. A rubber disc P 18
preferably placed inside this cap to make a tight joint. With this method of
removeably attaching the zincs in a primary battery a single opening only for each
cell is needed in the plate through which when the latter is not removeable the
solution may be poured and removed, the ebonite lining preventing the liquid
corroding the screw while a zinc may be renewed without removing the plate.
It will be seen that the screwing down of the cover will hold the plate o in
place and prevent the escape of liquid when the battery is tilted or overturned, but
the plate c may be sealed or secured in place in addition to the above if desired.
The connections of the zincs and carbons with the terminals kk will be understood
by reference to Fig. 3. the connection of the rings ii with the lamp being shewn in
1

page_text: In the manufacture of the cap m the centre rod q which is preferably of aluminium
or other material not attacked by the acids employed is made as a separate piece
from said cap and is secured thereto by screw r thus retaining in position the rubber
disc p and enabling same to be readily renewed by simply unscrewing rod q from
cap m.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed wo declare that what we
claim is :-
:-
1. In a primary battery the means for holding the zines consisting of the
combination of a metal cap.an insulating and protecting disc and tube and a metal
connecting piece between the cap and the zinc all substantially as described.
2. In a primary battery, the means for holding the zincs consisting of a screw
cap to which the zincs are removeably secured said cap closing an opening in the
plate covering the cells which opening is provided with an ebonite or like lining
substantially as.and for the purpose described.
3. The improvements in portable electric primary batteries and in their appli-
cation to miners and like portable lamps.substantially as described and illustrated.
Dated the 18th day of December 1893.
PHILIP M. JUSTICE,
55 & 56, Chancery Lane, London,
Chartered Patent Agent for the Applicants.
PHILIP M. JUSTICE,
55 & 56, Chancery Lane, London,
Chartered Patent Agent for the Applicants.