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#2769      Walker's double cone.      White porcelain.

  Lot # 2769
Listing Image
Pole_Top_Discoveries
Details
  • Lot # 2769
  • System ID # 631480
  • End Date
  • Start Date
Description

#2769      Walker's double cone.      White porcelain.

Length: 3-1/2 inches.

Early insulator from Great Britain.  Once part of Keith Neal's collection, later purchased by Marilyn Albers after Keith's passing, and still later became a part of the Lis & Jim Bergman collection after Marilyn passed.

This insulator is shown on page 34 as Figure 18 in Keith Neal's book titled Searching For Railway Telegraph Insulators.  He describes it as "South Eastern & Chatham Railway.  Walker's double cone insulator as used in tunnels. c. 1870.

This design is similar to the very early Cooke insulators which also allowed the line wire to pass through the insulator body and then secured with a clip.  See third image below showing the Cooke type insulator as it appeared with the clip in place and the insulators mounted horizontally with wire running through them. 

Note.... the auction photos show the insulator positioned upright.  When in actual use, the insulator would be positioned horizontally. 

This is actually a better design than the Cooke, as it allowed for the line wire to freely be inserted into the insulator through the perpendicular open slot, rather than having to feed the line wire through the interior hole of the Cooke design.  This is similar to the early glass and porcelain "blocks" used in America.

This example was used, as a shallow wire rub is evident at center of interior portion of the cone.

Very, very near mint.

From the Lis & Jim Bergman collection.