Primary Embossing Manufacturing Dates

From Insulator Wiki (Wikilator)

This is an approximate and incomplete list of dates that Primary Embossings were manufactured. If you can fill in some of the missing information, or correct mistakes, please do so!

• The Primary Embossing and Country are mostly from John & Carol McDougald's Insulators A History and Guide to North American Glass Pintype Insulators.
• The Category indicates whether this indicates a Manufacturer, Supply House, Trade Name, Style or Unknown.
• The Start Date and End Date have three notations
  • ">" which indicates the date is as specified or after
  • "<" which indicates the date is as specified or before
  • "~" which indicates the date is approximately
• The Description gives more details about the primary embossing.
• The References state where this information came from

Primary Embossing	Category	Country	Description	Start Date	End Date	References
A.A.	Unknown	Mexico
A.T.& T.CO.	Customer	U.S.A.	American Telephone & Telegraph Company	1885	1915	McD, p149
A.U.	Customer	U.S.A.	American Union. Produced by both Hemingray and Brookfield
AM.INSULATOR CO.	Manufacturer	U.S.A.	Probably a Manufacterer, not supply house. They were produced under some sort of arrangement at the American Iron Glass Pipe and Plate Co in Haverhill, Mass., but Am. Ins. Co. was a glass company responsible for producing insulators, not a telegraph supply house. And not all the evidence is 100% convincing. For one thing, American was around at least as early as mid-1883, while the Iron glass works wasn't in operation until December of 1884. That's a long time to be in business and not deliver any products to your customers.	1883	1886	McD, p37
AM.TEL.& TEL.CO.	Customer	U.S.A.	American Telephone & Telegraph Company	1885	1915	McD, p149
ARMSTRONG	Manufacturer	U.S.A.	Armstrong	1946	1969	McD, p138
AYALA	Manufacturer	Mexico	probably a small family glass works (Mexican)
B	Manufacturer	U.S.A.	Brookfield	1902	1922	McD, p24
B & O	Customer	U.S.A.	Baltimore & Ohio Railway
B.C.DRIP	Unknown	Canada	B.C.Drip
B.E.L.CO.	Unknown	U.S.A.	Possibly B??? Electrical Light Co., in which case it would be a customer
B.F.G.CO.	Manufacturer	U.S.A.	Beaver Falls Glass Company	1869	1879	McD, p106
B.G.M.CO.	Manufacturer	U.S.A.	Baltimore Glass Manufacturing Company	1896	1903	McD, p29
B.T.C.	Customer	Canada	Bell Telephone Canada			McD, p149
BARCLAY	Style	U.S.A.	Barclay's Patent
BEAL'S	Style	U.S.A.	Beal's Patent
BIRMINGHAM	Unknown	U.S.A.	possibly Birmingham, Alabama. Most agree these appear to be Lynchburg products.
BOSTON BOTTLE WORKS	Manufacturer	U.S.A.	Boston Bottle Works	1871	1877	McD, p32
BROOKE'S	Manufacturer	U.S.A.	Depends on if it's the Brooke's Patent insulators or the Ellenville ones that say ""Homer Brooke's Pat. Aug. 14, 1883. Homer Brooke patented a glass press 1/25/1870, which was purchased by Brookfield. The 8/14/1883 date refers to a patent issued to Matthew Johnson. Apparently Johnson and Brooke were both influential at the Ellenville NY glass co and that's where those insulators come from (according to Ray Klingensmith.)
BROOKFIELD	Manufacturer	U.S.A.	Brookfield	1869	1921	McD, p24
BUZBY	Style	U.S.A.	Buzby
C.& P.TEL.CO.	Customer	U.S.A.	Chesapeake & Potomac Telephone Company	1880		McD, p150
C.D.& P.TEL.CO.	Customer	U.S.A.	Central District & Printing Telegraph Company	1874	1918	McD, p150
C.E.L.CO.	Customer	U.S.A.	Cambridge Electric Light Co, user (some say California Electric Light Co, but the insulators bear all the hallmarks of Pennycuick, a Boston manufacturer. Plus, early collectors claim these were extensively used in Cambridge and the Boston area, and very few have turned up in California.)	1885	1900	McD, p58
C.E.W.	Supply House	U.S.A.	California Electrical Works. This was a supply house, and most likely were produced by local glass co; some insist that CEW actually owned their own glass works, but there's scant evidence to that effect. Same thing for EC&M, which was CEW's predecessor.	1877	1908	McD, p86
C.G.I.CO.	Manufacturer	U.S.A.	California Glass Insulator Company	1912	1916	McD, p90
C.N.R.	Customer	Canada	Canadian Northern Railway
C.P.R.	Customer	Canada	Canadian Pacific Railway
CABLE	Style	U.S.A.	Produced by Brookfield, possibly Hemingray, probably Oakman.
CAL.ELEC.WORKS	Supply House	U.S.A.	California Electrical Works. See C.E.W.	1877	1908	McD, p86
CALIFORNIA	Manufacturer	U.S.A.	See C.G.I.	1912	1916	McD, p90
CANADA	Customer	Canada	Bell Telephone Company of Canada			McD, p149
CANADIAN PACIFIC RY.CO.	Customer	Canada	Canadian Pacific Railway Company
CHAMBERS	Style	U.S.A.	Produced by Hemingray
CHESTER	Supply House	U.S.A.	Charles T. & J. N. Chester, NYC
CHICAGO INSULATING CO.	Manufacturer	U.S.A.	but probably produced in a larger glass works	1893	1894	McD, p101
CIA COMERCIAL	Customer	Mexico	Ericsson was an early manufacturer of telephones. These were probably produced in Mexico for the local Ericsson distributor. (full name is Compan~ia Commercial Ericsson, Sociedad Anonimo)
CIA TELEFONICA	Customer	Mexico	probably user (Mexican)
CIN COM	Customer	Cuba
CITY FIRE ALARM	Customer	U.S.A.	for Fall River, Massachusetts	1900	1915	McD, p59
CLIMAX	Style	U.S.A.	Manufactured by Brookfield
COLUMBIA	Style	U.S.A.	Produced by Oakman, Brookfield, and Hemingray
COMBINATION SAFETY	Style	U.S.A.	Produced by Brookfield
CONVERSE	Style	U.S.A.	Produced by Hemingray, possibly Brookfield
CRIMSA	Manufacturer	Mexico	Probably manufacturer, Mexican
CRISA	Manufacturer	Mexico
CRISOL TEXCOCO	Manufacturer	Mexico
CROWN	Style	U.S.A.	probably produced by Brookfield
CUTTER	Style	U.S.A.	Cutter Tree Insulators
DERF	Unknown	Mexico	Probably supply house
DERFLINGHER	Unknown	Mexico	Probably supply house
DIAMOND	Manufacturer	Canada	Diamond	1890	1913	McD, p154
DIAMOND P	Manufacturer	U.S.A.	Diamond P	1885	1895	McD, p56
DOMINION	Manufacturer	Canada	Dominion Glass Company	1913	1967	McD, p155
DRY SPOT INSULATOR	Style	U.S.A.	Produced by Whitall Tatum
DUQUESNE	Manufacturer	U.S.A.	Duquesne Glass Company	1885	1895~	McD, p108
DWIGHT	Style	U.S.A.	Probably produced by Brookfield	1892	1919	McD, p156
E.C.& M.CO.	Supply House	U.S.A.	Electrical Construction & Maintenance Company	1870	1880	McD, p84
E.D.R.	Customer	Canada	Edmonton Dunvegan Railway	1907	1921	McD, p158
E.L.CO.	Supply House	U.S.A.	Probably Edwin Lewis Company	1890	1910	McD, p58
E.R.	Customer	U.S.A.	Erie Railway
E.R.W.	Customer	U.S.A.	Erie Railway	1861
E.S.B.CO.		U.S.A.
E.S.G.CO.		U.S.A.
E.S.S.CO.	Supply House	U.S.A.	Probably Electrical Service Supplies Company
ELECTRICAL SUPPLY CO.	Supply House	U.S.A.	Electrical Supply Company	1885	1893	McD, p103
EMMINGER'S	Style	U.S.A.	Probably by Beaver Falls Glass & Paisley
ERICSSON	Supply House	Mexico	See CIA Commercial Ericsson
F.F.C.C.N.DE M.	Customer	Mexico	Ferrocariles Nacionales de Mexico, user. Natinal Mexican Railroad. FFCC is a common Spanish abbreviation for railroad.
FALL RIVER	Customer	U.S.A.	City of Fall River, Massachusetts	1900	1915	McD, p59
FISHER	Supply House	U.S.A.	Fisher Electrical Works. George Fisher was the patent holder on the design.
FLOY	Style	U.S.A.	Floy
FLUID INSULATOR	Style	U.S.A.	Fluid
FT.W.E.CO.	Supply House	U.S.A.	Fort Wayne (Indiana) Electic Company
G.E.CO.	Supply House	U.S.A.	General Electric. Produced by Brookfield, Hemingray, and perhaps others.	1892	1899	McD, p145
G.N.R.	Customer	Canada	GNR
G.N.W.TEL.CO.	Customer	Canada	Great Nortwestern Telegraph Company	1880		McD, p158
G.P.R.	Unknown	Canada	Probably a small Canadian railway, or a misprint of CPR
G.T.P.TEL.CO.	Customer	Canada	Grand Trunk Pacific Telegraph Company	1906	1928	McD, p158
GAYNER	Manufacturer	U.S.A.	Gayner	1920	1923	McD, p115
GOOD	Manufacturer	U.S.A.	R. Good, Denver Colorado	1897	1899	McD, p95
GREAT NORTHWESTERN	Customer	Canada	Great Northwestern
GREELEY	Style	U.S.A.	Greeley
GREGORY	Style	U.S.A.	F. W. Gregory
H.B.R.	Customer	Canada	Hudson Bay Railway			McD, p158
H.G.CO.	Manufacturer	U.S.A.	Hemingray Glass Company	1883	1910	McD, p64
H.G.W.	Unknown	U.S.A.
HAMILTON	Manufacturer	Canada	Hamilton Glass Company	1880	1891	McD, p156
HARLOE	Manufacturer	U.S.A.	Harloe	1902	1906	McD, p108
HAWLEY	Manufacturer	U.S.A.	Harloe	1902	1906	McD, p108
HEMINGRAY	Manufacturer	U.S.A.	Hemingray Glass Company	1865	1970	McD, p64
JEFFREY MFG.CO.	Supply House	U.S.A.	Probably produced by Hemingray
JOHNSON & WATSON	Style	U.S.A.	Johnson & Watson	1908
JUMBO	Style	U.S.A.	Produced by Brookfield, possibly Oakman, possibly Hemingray too.
K	Unknown	U.S.A.	Possibly Knowles
K.C.G.W.	Manufacturer	U.S.A.	King City Glass Works	1890	1897	McD, p104
KERR	Manufacturer	U.S.A.	Kerr	1969	1975	McD, p142
KIMBLE	Trade Name	U.S.A.	Produced by Hemingray	1952	1970	McD, p79
KNAPP		U.S.A.
KNOWLES	Supply House	U.S.A.	Knowles	1900	1903	McD, p62
L.G.T.& CO.	Supply House	U.S.A.	Luther G. Tillotson & Company. Probably produced by Brookfield.
LAWRENCE GRAY	Manufacturer	U.S.A.	Possibly a small glassworks set up by Gray himself, possibly produced by him at a larger glass house.
LIQUID INSULATOR	Style	U.S.A.	Liquid Insulator
LOCKE	Supply House	U.S.A.	Manufactured by Brookfield mostly, some by Hemingray, plus there's a few that were produced by Locke himself, possibly at Corning. Locke wasn't really a ""supply house"" in the traditional sense.	1892	1914	McD, p126
LOWEX	Trade Name	U.S.A.	Produced by Hemingray	1933	1970
LYNCHBURG	Manufacturer	U.S.A.	Lynchburg	1923	1925	McD, p116
M.& E.CO.	Supply House	U.S.A.	Mayer & Englund Company, a supply house in Philadelphia
M.T.CO.	Customer	Canada	Montreal Telegraph Company
MANHATTAN	Style	U.S.A.	Manhattan
MAYDWELL	Supply House	U.S.A.	Maydwell & Hartzell. The insulators were produced by Crystallite Glass Company after McLaughlin went out of business.	1935	1940	McD, p94
McLAUGHLIN	Manufacturer	U.S.A.	McLaughlin	1925	1935	McD, p92
MERSHON	Style	U.S.A.	Probably produced by Brookfield and others.
MIN COM	Customer	Cuba
MINE INSULATOR	Style	U.S.A.	Possibly Hemingray
MONTREAL	Customer	Canada	Montreal Telegraph Company
N de M	Customer	Mexico	Mexican National. Ferrocarriles nacionales de Mexico.
N.E.G.M.CO.	Manufacturer	U.S.A.	New England Glass Manufacturing Company	1899	1899	McD, p55
N.W.& B.I.T.CO.	Customer	Canada	New Westminster and Burard Inlet Telephone Company			McD, p151
NATIONAL INSULATOR CO.	Manufacturer	U.S.A.	Probably produced at Iron City Glass Works	1884	1886	McD, p49
NEW ENG.TEL.& TEL.CO.	Customer	U.S.A.	New England Telphone & Telegraph Company	1883		McD, p150
NO EMBOSSING	Unknown	U.S.A.	No Embossing
NO EMBOSSING - CANADA	Unknown	Canada	No Embossing - Canada
NO EMBOSSING - MEXICO	Unknown	Mexico	No Embossing - Mexico
NO NAME	Unknown	U.S.A.	No Name
NO NAME - CANADA	Unknown	Canada	No Name - Canada
NO NAME - MEXICO	Unknown	Mexico	No Name - Mexico
O.V.G.CO.	Manufacturer	U.S.A.	Ohio Valley Glass Company	1903	1905	McD, p104
OAKMAN MFG.CO.	Manufacturer	U.S.A.	Oakman Manufacturing Company	1890	1897	McD, p39
OWENS ILLINOIS	Manufacturer	U.S.A.	Owens-Illinois, aka Hemingray			McD, p79
P & W	Unknown	U.S.A.	Apparently by Beaver Falls Glass Company
P.L.W.	Customer	U.S.A.	Brookfield production - Pennsylvania Lines West
P.R.R.	Customer	U.S.A.	Brookfield production - Pennsylvania Railroad
P.S.S.A.	Unknown	Mexico	Possibly a supply house -- perhaps Patricio Sordo S.A.
PAISLEY	Manufacturer	U.S.A.	S. T. Paisley, possibly Beaver Falls Glass Works.
PAT APP FOR	Unknown	U.S.A.	Patent Applied For
PAT'D	Unknown	U.S.A.	Patented
PATENT - DEC. 19, 1871	Manufacturer	U.S.A.	Hemingray Glass Company	1871
PATENT - OTHER	Unknown	U.S.A.	Patent - Other
PETTINGELL ANDREWS	Supply House	U.S.A.	Produced by Pennycuick	1888~	1900	McD, p57
PONY	Style	U.S.A.	Pony
POSTAL	Customer	U.S.A.	Postal Telegraph Company. Produced by Brookfield, Hemingray, California, possibly Denver companies too		1943
PRISM	Supply House	U.S.A.	Produced by Novelty Glass Works in NJ for Knowles	1902	1903	McD, p62
PYREX	Trade Name	U.S.A.	Corning Glass Works.	1924	1941	McD, p129
R.Y T.	Unknown	Mexico	RYT
S.B.T.& T.CO.	Customer	U.S.A.	Southern Bell Tel & Tel	1885	1910	McD, p151
S.F.	Unknown	U.S.A.	Possibly San Francisco? Commonly found in the midwest though
S.S.& CO.	Supply House	U.S.A.	Shay, Stephens & Company. Chicago, probably Hemingray manufactured.	1889	1890	CJ, 12/1993, p.7
SANTA ANA	Style	U.S.A.	Produced by California and Hemingray; Brookfield ones don't say ""Santa Ana""
SEILERS	Supply House	U.S.A.	Supply house, also Paul Seiler was the patent holder. Produced by Hemingray			McD, p88
SO.MASS.TEL.CO.	Customer	U.S.A.	Southern Massachusetts Telephone Company	1890	1910	McD, p151
ST.LOUIS MALLEABLE	Unknown	U.S.A.	St Louis Malleable
STANDARD	Manufacturer	U.S.A.	Standard
STANDARD GLASS INSULATOR CO.	Manufacturer	U.S.A.	Standard Glass Insulator Company	1893	1894	McD, p53
STAR	Supply House	U.S.A.	Distributed by GE and produced by Hemingray, Brookfield, NEGM, and possibly others.	1892	1907	McD, p145
STERLING	Manufacturer	U.S.A.	Sterling	1902	1907	McD, p122
SURGE	Trade Name	U.S.A.	Trade name used by Babson Brothers. According to Woodward, produced by Hemingray. According to Kevin Lawless's research and a letter from an old-timer at Babson, they were produced by Corning. The "TM Reg US Pat Off" embossing seems more consistent with Corning production. Others report unopened boxes of Surges have the Owens-Illinois logo Hemingray). So the jury's still out.	1945	1955	McD, p102
T.C.R.	Customer	Canada	Transcontinental Railway	1903	1913	McD, p158
TEL.FED.MEX.	Customer	Mexico	Telgrafos Federales Mexicanos
TELEGRAFOS NACIONALES	Customer	Mexico	Telegrafos Nacionales
T-H.	Supply House	U.S.A.	Thompson Houston Electric Company	1883	1892
T-H.E.CO.	Supply House	U.S.A.	Thompson Houston Electric Company	1883	1892	McD, p60
TILLOTSON & CO.	Supply House	U.S.A.	probably some are by Brookfield
TWIGGS	Style	U.S.A.	Twiggs
TWO PIECE TRANSPOSITION	Style	U.S.A.	Two Piece Transposition
U.S.TEL.CO.	Customer	U.S.A.	United States Telegraph Company	1898	1914	McD, p151
V.B.	Manufacturer	Mexico	probably manufacturer, mexican. Vidriera is spanish for ""glass house"", so that could be what the V stands for
W.E.MFG.CO.	Manufacturer	U.S.A.	WE Mfg Co
W.F.G.CO.	Manufacturer	U.S.A.	Western Flint Glass Company	1899	1900	McD, p95
W.G.M.CO.	Manufacturer	U.S.A.	Western Glass Manufacturing Company	1900	1909	McD, p95
W.U.	Customer	U.S.A.	Western Union
WESTINGHOUSE	Manufacturer	U.S.A.	While Westinghouse was a supply house, they actually purchased their own glass factory and ran it for a few years. So this would be a manufacturer.	1886	1898	McD, p147
WHITALL TATUM	Manufacturer	U.S.A.	Whitall Tatum	1922	1946	McD, p133

References

• [McD] McDougald, John & Carol (1990). Insulators A History and Guide to North American Glass Pintype Insulators.