Globe-union Inc.

Paul E Bantz

William J Wruck

William H Tiedemann

Richard R Binder

Guy D McDonald

Robert William Mayer

Randall T Gryczkowski

A cast strap for a lead-acid battery is made of a lead-based alloy consisting essentially of from about 2.5 to 3.5 wt. % antimony, about 0.01 to 0.5 wt. % arsenic, about 0.01 to 0.5 wt. % tin, about 0.008 to 0.1 wt. % selenium, and the balance lead. The content of at least one of arsenic, tin and selenium is within the following ranges: about 0.075 to 0.5 wt. % tin, about 0.1 to 0.5 wt. % arsenic, and 0.021 to 0.03 wt. % selenium. For lead-based alloys containing antimony, arsenic, tin and selenium, increased additions of antimony, arsenic, and selenium generally have a favorable effect on long term corrosion resistance of battery straps in a lead-acid battery environment, whereas tin has an unfavorable effect such that increased amounts of tin dramatically lower high temperature corrosion resistance. The unfavorable effects of tin on corrosion resistance are moderated by adjustment of the levels of the other three elements, particularly arsenic, which can provide a predictable level of increase in corrosion resistance for a given arsenic content. A family of alloys highly suitable for use as cast-on battery straps and intercell connectors has been developed based upon these relationships.

Battery straps made of a lead-based alloy containing antimony, arsenic,

A porous compressible plastic material is inserted into the head space above the cells in a storage battery to attenuate the explosion of combustible gases accumulating therein. The attenuation material is distributed to create a unique bimodal pore distribution, including a major proportion of small pores effective in attenuation and a minor proportion of large pores effective in gas and electrolyte management. Both open cell and fibrous materials may be utilized.

Battery explosion attenuation material and method

A porous compressible plastic material is inserted into the head space above the cells in a storage battery to attenuate the explosion of combustible gases accumulating therein. The attenuation material is distributed to create a unique bimodal por distribution, including a major proportion of small pores effective in attenuation and a minor proportion of large pores effective in gas and electrolyte management. Both open cell and fibrous materials may be utilized.

A porous compressible plastic material is inserted into the head space above the cells in a storage battery to attenuate the explosion of combustible gases accumulating therein. The attenuation material has a unique bimodal pore distribution, including a major proportion of small pores effective in attenuation and a minor proportion of large pores effective in gas and electrolyte management. Both open cell and fibrous materials may be utilized.

A ladle gate for use with casting apparatus including a mold of the kind used in casting battery plate grids and including a ladle of the type used in holding a supply of molten lead alloy and being pivotable into a pouring position wherein a quantity of the molten lead alloy can be poured into the mold. The ladle gate is positioned adjacent the ladle spouts and functions to permit flow of molten lead alloy through the ladle spouts when the ladle is in a pour position, and to interrupt the flow of molten lead alloy through the spouts at the completion of the pour, when the ladle pivots to its rest position, to thereby prevent the formation of solidified drippage at the spouts.

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Colgate, WI, United States of America

Paul E Bantz