Bell Telephone Laboratories

Jacques A Augis

Harry John Leamy

Ho Sou Chen

Christopher C Lo

Erhard T Eisenmann

Lon L Hines

A process is described for heat-treating a gold contact surface so as to increase lifetimes and render it more reliable particularly for high current operation. A particular advantage of this procedure is that it can be carried out at a low enough temperature so that magnetic properties of certain types of contacts will not be affected.

Process for producing gold plated contacts

A process is described for making hard gold films suitable for electrical contact surfaces. A particular advantage of these films is that they operate well at high temperatures without forming resistive films on the contact surface.

Hard gold surfaces

A new type of electrical contact is described which has reduced erosion and sticking failures and has reduced material costs. The electrical contact is particularly suitable for sealed electrical contacts such as in sealed remreed contacts.

Sealed electrical contacts

An electric fuse is disclosed whose metallic fuse element is in a glassy state. The disclosed fuse is fast-acting and is particularly suited to protect delicate electronic apparatus against current overload.

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Pickerington, OH, United States of America

Jacques A Augis