CD 269, JUMBO, Dark Aqua

A moderate size and heavy insulator known as a cable insulator produced for power distribution and nickname the "Eared Jumbo" insulator. This insulator was also catalogued in early 1900's electrical supply catalogues as the "New Jumbo," which was an upgrade from the earlier CD 140 side wire groove Jumbo insulators.

 

Two glass companies produced this style of insulator, Oakman Manufacturing Company at Boston, Massachusetts, and the Brookfield Glass Company at Old Bridge, New Jersey, from the 1890's and the decade of 1900's. This style became popular for use on street railways, trolley lines, and elevated railway structures where a heavy direct current (DC) feeder cable was used. This style was also used quite extensively in the eastern states on the high voltage lines at industrial mill sites.

 

This particular Jumbo insulator was produced by the Brookfield Glass Company at Old Bridge, New Jersey. Large quantities of these Jumbo insulators were used on the elevated railway structure in Boston, also known as the "Boston EL."

 

This link shows a picture taken in 1898 of the "Boston EL" showing many of the CD 269 Jumbo insulators servicing the large cables.

www.insulators.info/pictures/?id=313944703

 

This link shows a picture taken in 1957 of the "Boston EL" showing a lot less CD 269 Jumbos insulators servicing the large cables.

www.insulators.info/pictures/?id=320884380

 

Embossing (F-Skirt) JUMBO

Index # 010

 

 

 

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