Sleeve arrangement for a hermetic terminal assembly
AssigneeEmerson Electric Co.
InventorsBenjamin Bowsky, Larry G. Burrows, Glenn A. Honkomp
Life of this patent
Estimating the term…
Abstract
A hermetic terminal assembly for a motor unit housing including a cup-shaped body, the bottom of which has a rim and at least one hole defining an annular sealing lip extending in the same direction therefrom through which hole an electrical connection pin extends in sealed relation thereto with the pin insulated by a protective insulating extension sleeve bonded to a sealing insulator, the extension sleeve being formed relative the sealing insulator member and lip extremity to contact the outer periphery of the lip to remove possible sealing insulator cracking to a position removed from the pin.
Claims10
A hermetic terminal assembly adapted to be secured to an opening in a motor unit housing comprising:
- a cup-shaped body with a bottom and a rim extending in one direction from said bottom, said bottom having at least one hole in it defined by an annular sealing lip projecting in the same direction as said rim;
- a current conducting pin extending through said hole, said pin having an outer end to extend externally of said housing to receive an electrical connection to a current source and an inner end to receive an electrical connection disposed in said housing;
- a sealing insulator bonding said pin to the inside surface of said lip;
- and,
- an electrically insulating extension sleeve surrounding said pin with an end portion thereof cooperating with said hole defined by said annular lip to engage with and be bonded to said sealing insulator, said end portion of said extension sleeve and the end portion of said annular lip being so sized and geometrically configured that the outer wall of said extension sleeve abuttingly engages said end portion of said annular lip only along the outer periphery thereof in substantial line contact therewith, thereby localizing any cracking of said sealing insulator which might occur from the abutting contact of said extension sleeve with said lip to a position remote from said conducting pin.
A hermetic terminal assembly adapted to be secured to an opening in a motor unit housing comprising:
- a metallic cup-shaped body with a bottom and a rim extending in one direction from said bottom, said bottom having at least one hole in it defined by an annular sealing lip projecting in the same direction as said rim;
- a stainless steel current conducting pin extending through said hole, said pin having an outer end to extend externally of said housing to receive an electric connection to a current source and an inner end to receive an electrical connection disposed in said housing;
- a glass sealing insulator bonding said pin to the inside surface of said lip;
- and
- an electrically insulating ceramic extension sleeve surrounding said pin including an end portion in the form of a truncated cone terminating in a cylindrical end nesting with the hole determined by said annular sealing lip in annular spaced relation from said pin, the outer side wall of said truncated cone tapering inwardly toward said cylindrical end at an angle of approximately 45.degree. to said cylindrical end to abuttingly contact the end portion of said annular sealing lip which tapers inwardly in a directionally similar fashion but at a greater angle of taper of approximately 53.degree. to make substantial line contact along the outer periphery of said end portion of said annular lip with said glass sealing insulator occupying the remaining space between said nesting portion of said extension sleeve and said annular lip and at least a portion of the annular space between said extension sleeve and said pin, whereby said extension sleeve is embedded in said glass sealing insulator to localize any cracking of said glass sealing insulator which might occur adjacent the abutting contact of said sleeve with said lip to a position remote from said terminal pin.
Dependencies are inferred from the claim text.