MENTS IN PLATES FOR SECONDARY OR STORAGE BATTERIES
Year: 1882

page_text: PROVISIONAL SPECIFICATION left by the said Charles Sorley at the Offico
of the Commissioners of Patents on the 21st June 1882.
CHARLES SORLEY of 18 Rosoman Street in the county of Middlesex "IMPROVE-
MENTS IN PLATES FOR SECONDARY OR STORAGE BATTERIES"
These plates are constructed of suitable material, say lead for preference, and of
suitable shape and size. The special feature in them is certain grooves cut or
formed in any convenient direction upon or in the surface of the plate. A rough
or feather edge is produced preferably by undercutting the groove and this rough
edge is peculiarly subject to oxidation.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Charles Sorley in the Great Seal Patent Office on the
21st December 1882.
CHARLES SORLEY of 18 Rosoman Street in the County of Middlesex "IMPROVE-
MENTS IN PLATES FOR SECONDARY OR STORAGE BATTERIES
"
These plates are constructed of suitable material say lead for preference, and of
suitable shape and size. The special feature in them is certain grooves cut or
formed in any convenient direction upon or in the surface of the plate. A rough
or feather edge is produced preferably by undercutting the groove and this rough
edge is peculiarly subject to oxidation.
In the accompanying drawings Fig 1 shows a side view of the plate and Fig 2
a vertical section through the same on an enlarged scale. It will be seen that
grooves A aro cut or formed in the surface of the plate and the faces may if desired
be curved outwards terminating in a thin edge at B which may be rough or plain
and which is peculiarly open to attack and readily oxidises. The grooves may be
formed in any suitable manner, but I prefer to make them by means of a shaping
machine; when such a machine is fitted with a suitable tool the rough edge
becomes formed as it were into pointed teeth somewhat as shown at C in the
drawing which assists speedy oxidation. The faces when curved are formed so,
for the purpose of presenting as large a surface as possible though straight faces
can be employed if desired but it is better to undercut the grooves to increase the
surface and the bottoms of the grooves on one side of the plate are preferably
arranged so as to come alternately or break joint" with those upon the other side
as shown in Fig 2, so as to weaken the plate as little as possible I do not bind
myself to any special thickness or size or form of plate, and the grooves can be
formed in any convenient direction, but it is preferred that they should be in a
horizontal plane as they then form excellent places for the peroxide of lead to
lodge in when formed. In practice the plates are generally made thinner than
shown in the drawing.
"
Having now described my invention and the method of performing the same I
wish it to be understood that what I claim and desire to protect under the herein-
before in part recited Letters Patent is
The herein described plates in or upon which a number of grooves are so cut or
formed that the ridges between the grooves terminate in thin edges, rough, toothed,
or plain substantially as set forth and shown
In witness whereof I the said Charles Sorley, have hereunto set my hand
and seal this nineteenth day of December in the year of Our Lord One
thousand eight hundred and eighty two
CHARLES SORLEY
(L.S.)