CD 290-309

Saddle wire groove - Triple petticoat

CD 309

CD 309

Size: 177mm x 149mm (7" x 5.875")

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Years produced: c.1899
Style (CD) scarcity: 1, One of a kind*
Intended use: High Voltage
Style / catalog number: BEAL'S
Number of unique insulators: 1
Notes: One of a kind insulator found at the Hemingray factory dump in the 1960s. Patented Oct. 10, 1899 (Patent No. 634,568) Insulator was designed to be mounted to the underside of a crossarm.

* Only one unit is reported yet there are two color listing in the 2015 "Guide". I suspect there is only one and the second listing is an error.

Primary Embossing = Embossing on the front of the insulator, usually is that manufacturers name or the customers name. No embossing units will be noted as NO EMBOSSING. Units with no name but with numbers or letters will be noted as NO NAME.

Examples:
HEMINGRAY
S.B.T.&.T.Co
NO NAME
NO EMBOSSING

EIN = Embossing Index Number is a standardized way to identify each unique embossing.

(FS) = Front Skirt
(RS) = Rear Skirt
(DO) = Dome
(CR) = Crown
(FC) = Front Crown
(RC) = Rear Crown
(BG) = Between Grooves
(FA ) = Front, Above wire groove
(FB) = Front, Below wire groove
(BE) = Base Embossed
(FU) = Front Umbrella
(RU) = Rear Umbrella
(FCE) = Front Center
(RCE) = Rear Center
(TE) = Top Ear
(TOP) = Top of Pinhole
/ = Next line of embossing

There are unique characteristics of the insulator that are not related to the embossing, but is worth noting.

Examples:
Factory molded brass bushing
Flaired skirt
MLOB = Mold Line Over Base
Waffle top
Wide saddle groove

Base = the bottom of the insulator. It is noted in the following standardized ways.

SDP = Sharp Drip Points
RDP = Round Drip Points
CB = Corrugated Base
SB = Smooth Base

= Insulator has been verified that exists
= Insulator has been verified that exists, but not listed in the "guide"
= Insulator has not yet been verified as existing
= Suspected error listing in the "guide" because listing does not match up with known manufacturing practices. Such as numbers and dots on an aqua insulator, or insulators listed with both factory molded brass bushing and without. Many do not come in both configurations and are listed as coming in both. Etc.

Color = The approximate color of the insulator. Due to manufacturing variations, insulators with the same color name maybe slightly different in actual appearance.

Primary Embossing EIN Embossing Special Features Base Color Verified?

BEAL'S

[010]

(TE) BEAL'S HIGH TENSION/INSULATOR (Top/Right ear) PATENTED OCT. 10 1899

SB

Aqua

BEAL'S

[010]

(TE) BEAL'S HIGH TENSION/INSULATOR (Top/Right ear) PATENTED OCT. 10 1899

SB

Blue Aqua

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