Image / Jo Jennings and Calvin K. Townsend exmine two experimental vacuum switches, ca …

Jo Jennings and Calvin K. Townsend exmine two experimental vacuum switches, ca 1958

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Title: Jo Jennings and Calvin K. Townsend exmine two experimental vacuum switches, ca 1958
Contributing Institution: History San Jose Research Library
Collection: History San Jose Online Catalog
Rights Information: Please contact the contributing institution for more information regarding the copyright status of this object.
Description: Jo Jennings and his long time partner Calvin K. Townsend examine two experimental vacuum switches. Photo taken in late 1950s. The vacuum switches were designed mainly for use in the utility field as circuit breakers, motor tap changer or capaciter bank switch.
Type: image
Identifier: F8573092-0E7D-4D50-809F-893465648240
2003-33-106
Subject: Jennings Radio Manufacturing Corp
Jennings, Jo Emmett
Townsend, Calvin K

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