Chloride Group Limited

Stanley Charles Foulkes

James Ratcliffe

James M Stephenson

Robert Moore

A method of making a multitubular sheath comprising providing a porous multitubular fabric impregnated with thermoplastic or deformable polymer, continuously feeding the fabric onto an array of parallel metal rods, one tube to each rod, the rods having straight sizing portions, while holding the rods in a fixed position, the rods having substantially the same cross sectional area over the whole of their length, the fabric at least immediately prior to the sizing portions being substantially at ambient temperature, heating the fabric on the sizing portions so as to permit the fabric to conform to the rod, thereafter cooling the fabric on the rods to solidify or the deformable composite material to set to shape and the tubes to become self supporting, feeding the fabric off the ends of the rods and cutting it to the required length.

Method of making multitubular sheaths

There is disclosed apparatus for filling enveloped plates for batteries with active material which comprises at least one filling station comprising means for supporting the envelope of a plate assembled on its current conducting element in a substantially vertical plane and a filling manifold adapted to introduce a slurry of active material into the envelope of a plate located in the said supporting means, the apparatus further comprising, a slurry storage tank adapted to contain a supply of active material slurry and provided with agitating means for maintaining the active material in the storage tank in suspension as a slurry, and delivery means for delivering slurry from the storage tank to the manifold of a selected filling station.

Manufacture of battery plates

There is disclosed an improved tubular battery plate comprising a porous envelope enclosing a current collector comprising an array of members extending perpendicularly from an end member which affords a current take off lug with active material disposed between the perpendicular current collector members and the inside face of the porous envelope the ratio of the length of the tubes in cms to the free cross sectional area in sq. cms being in the range 100.1 to 295.1 and the degree of stratification of the active material in the tubes being less than 5%.

Battery plates

There is disclosed a method for preparing enveloped plates for batteries by introducing an active material composition containing liquids into the porous envelope of the plate, when the envelope is assembled on the current conducting element of the plate, the active material composition being an alkaline active material composition with a liquid content such that active material is filtered out by the porous envelope, while liquids pass out through the walls of the porous envelope. There is also disclosed a novel alkaline electric storage battery electrode comprising a porous envelope enclosing within it particulate active material which is electrochemically active under alkaline conditions, the porous envelope being one which is capable of filtering out a bed of active material from an aqueous slurry of the active material containing 0.5 parts of the active material per part of water.

Manufacture of tubular type battery plates

There is disclosed a method for preparing enveloped plates for batteries by introducing an active material composition containing liquids into the porous envelope of the plate, when the envelope is assembled on the current conducting element of the plate using an active material composition with a liquid content such that active material is filtered out by the porous envelope, and a bed of active material is built up in the envelope, the bed building up from the end remote from that at which the composition is introduced back to the end at which the composition is introduced, liquid issuing through the walls of the envelope throughout the period that the bed is being built up. A variety of suitable active material compositions are described together with apparatus suitable for carrying out the method.

There is disclosed a method for preparing enveloped plates for batteries which comprises introducing an active material composition into the porous envelope of an enveloped plate when the envelope is assembled on the current conducting element of the plate, characterized in that the active material composition is introduced into the envelope as an aqueous slurry which has a rotating vane viscometer torque value (which is defined in the specification) in the range 0.006 to 0.06 lbs ft at 20.degree. C. A variety of suitable active material compositions are described together with apparatus suitable for carrying out the method.

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Bolton, United Kingdom

Stanley Charles Foulkes