Hemingray Dots

CD 290-309

Saddle wire groove - Triple petticoat


CD 303/310

CD 303/310

Size: 228mm x 304mm (9" x 12")

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Years produced: 1903 - 1921
Style (CD) scarcity: 6, 501-1,000 known
Intended use: High Voltage
Notes: Production dates listed above are based on catalogs. Hemingray had an ad that stated Jan 1 1903 their new high potential insulator would be ready. Referring to the CD 303/310. The last time It appears in catalogs or ads is 1921.

Originally designed for use on a line in Montana (See this in-depth article). But also found to be used in WA and Michigan. Also check out the photos of them in use!

Primary EmbossingEINEmbossingBaseColor
HEMINGRAY[010](F-Skirt) HEMINGRAY/PATENT MAY 2ND 1893 (R-Skirt) MUNCIE TYPE (CD 310 sleeve is unembossed) RDPAqua
HEMINGRAY[010](F-Skirt) HEMINGRAY/PATENT MAY 2ND 1893 (R-Skirt) MUNCIE TYPE (CD 310 sleeve is unembossed) RDPBlue Aqua
HEMINGRAY[010](F-Skirt) HEMINGRAY/PATENT MAY 2ND 1893 (R-Skirt) MUNCIE TYPE (CD 310 sleeve is unembossed) RDPGreen
HEMINGRAY[010](F-Skirt) HEMINGRAY/PATENT MAY 2ND 1893 (R-Skirt) MUNCIE TYPE (CD 310 sleeve is unembossed) RDPHemingray Blue
HEMINGRAY[020](F-Skirt) HEMINGRAY/PATENT MAY 2ND 1893 (R-Skirt) MUNCIE TYPE/NO 76 (CD 310 sleeve is unembossed)RDPAqua
HEMINGRAY[020](F-Skirt) HEMINGRAY/PATENT MAY 2ND 1893 (R-Skirt) MUNCIE TYPE/NO 76 (CD 310 sleeve is unembossed)RDPBlue Aqua
HEMINGRAY[020](F-Skirt) HEMINGRAY/PATENT MAY 2ND 1893 (R-Skirt) MUNCIE TYPE/NO 76 (CD 310 sleeve is unembossed)RDPGreen
HEMINGRAY[020](F-Skirt) HEMINGRAY/PATENT MAY 2ND 1893 (R-Skirt) MUNCIE TYPE/NO 76 (CD 310 sleeve is unembossed)RDPHemingray Blue
HEMINGRAY[030](F-Skirt) HEMINGRAY/PATENT MAY 2ND 1893 (CD 310 sleeve is unembossed)RDPAqua
  • [010] - Blue Aqua

    HEMINGRAY

    [010]

    Blue Aqua

  • [020] - Aqua

    HEMINGRAY

    [020]

    Aqua

    Details

    This one is the harder to find “No 76” marked unit.

  • [030] - Aqua

    HEMINGRAY

    [030]

    Aqua

    Details

    This is the rarest of the three embossings. This unit does not have “MUNCIE” marked on it.

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