Abstract A gas-tight, liquid-tight cylindrical galvanic cell is provided with a cover integral with the cylindrical housing and having a central opening surrounded by a collar of smaller diameter than the housing and extending away from the housing. An electrically insulating ring is force fit onto the collar and an electrically conducting contact cap is force fit onto the ring. The collar is outwardly flared so that a predetermined internal pressure of the cell is required to force the cap off the ring, thereby relieving the pressure. A flexible, electrically conducting arrester element mechanically and electrically interconnects the cap and the interior of the cell. The cover having a collar is formed by rolling over the rim of a cylindrical cup-shaped container to form a cover and continuing the rolling of the rim onto a mandrel to form the collar.
A gas-tight, liquid-tight, cylindrical galvanic cell comprising a cylindrical, cup-shaped container, the open end of which is bent over thereby forming a cover having an opening coaxial with the cylindrical container, a collar formed on the cover, the collar extending above and away from the cover of the container and being of smaller diameter than the container, said cover and said collar formed by re-shaping said cylindrical cup-shaped container as a unitary single structure free of joints and seals between said cover and said container and said collar and said cover, an electrically insulating ring force-fit onto the collar and an electrically conducting cap force-fit onto the insulating ring.
Claim 2
Dependent Claim
109 words
A gas-tight, liquid-tight, cylindrical galvanic cell comprising a cylindrical, cup-shaped container, the open end of which is bent over thereby forming a cover having an opening coaxial with the cylindrical container, a collar formed on the cover, the collar extending above and away from the cover of the container and being of smaller diameter than the container, said cover and said collar formed by re-shaping said cylindrical cup-shaped container as a unitary single structure free of joints and seals between said cover and said container and said collar and said cover, an electrically insulating ring force-fit onto the collar and an electrically conducting cap force-fit onto the insulating ring.
Claim 3
Dependent Claim
26 words
A cell according to claim 1, further comprising a flexible, electrically conductive arrester element mechanically and electrically interconnecting the interior of the cell and the cap.
Claim 4
Dependent Claim
13 words
A cell according to claim 1, in which the collar is flared outwardly.