Back to results
US 4,226,920 AGranted
Expanded zinc electrode for dry cells
AssigneeHer Majesty the Queen in right of Canada, as represented by the Minister of National Defence
InventorWilliam A. Armstrong
Life of this patent
Estimating the term…
Abstract
The invention disclosed relates to an anode structure for use in dry cells, particularly in low temperature environments. The novel anode is constructed of a perforated electrochemically active material and wound to form a coil. Spacer means is provided to maintain substantially uniform spacing between adjacent layers of the coil.
Claims12
An anode for a cylindrical electrochemical cell, comprising
- (a) a sheet of a perforated electrochemically active material, said sheet being wound in the form of a coil, and
- (b) spacer means providing substantially uniform spacing between adjacent layers of the coil, said spacer means being in the form of a resilient strip-shaped material attached to said sheet material, the thickness of said strip being about 0.001 to 0.005 inch to permit adequate flow of electrolyte between said adjacent layers.
Dependencies are inferred from the claim text.