Identify Your Insulator

YES

Hemingray definitely made insulators marked with the following primary embossings:

• A.U.
• BARCLAY
• BEAL'S
• C.& P.TEL.CO.
• CHAMBERS
• E.S.G.CO.
• H.G.CO.
• HEMINGRAY
• JEFFREY MFG. CO.
• KIMBLE
• KNAPP
• LOWEX
• MINE INSULATOR
• NATIONAL BATTERY CO.
• OWENS-ILLINOIS
• PATENT - DEC. 19, 1871
• S.S.&CO.
• SEILERS
• ST.LOUIS MALLEABLE
• STANDARD
• SURGE
• TWO PIECE TRANSPOSITION
• U.S. LIGHT & HEATING CO.
• U.S.L.
• V.G.CONVERSE
• W.E.MFG.CO.

MAYBE

Hemingray made some insulators embossed with these names, but other glass companies did as well:

• AM. TEL. & TEL. CO.
• B & O
• B.E.L.CO.
• F.M.LOCKE
• KNOWLES
• NEW ENG.TEL.&TEL.CO.
• NO EMBOSSING
• NO NAME
• PATENT - OTHER
• PATENT APPLIED FOR
• POSTAL
• S.B.T.&T.CO.
• T-H.E.CO.
• W.U.
• WESTINGHOUSE

NO

The following insulators were not manufactured by Hemingray and are outside the scope of this web site:

• Armstrong
• B
• Brookfield
• California
• Gayner
• Good
• Hawley
• Kerr
• Lynchburg
• Maydwell
• McLaughlin
• Pyrex
• Star
• W.F.G.Co.
• W.G.M.Co.
• Whitall Tatum