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#525 - U187 - Pierce Patent - Brown porcelain. 
- Sold Winning Bid: $425.00
- 7 Bid(s) View Bid History
- Lot # 525
- System ID # 262148
- End Date
- Start Date
#525 U-187 PIERCE PAT Brown porcelain.
This style insulator was patented by Alfred L. Pierce of Wallingford, Connecticut. The main body has a slot top, formed to receive the cap. Once the line wire was inserted into the slot, the cap was put in place and secured with a binding wire. This allowed a “slack wire” application, especially advantageous if the line was constructed in a manner with the insulators attached to trees.
Only a limited number have been found in locations where they were placed in service. Some were also found at the dump-site of the Pittsburgh High Voltage Insulator Company in Derry, Pennsylvania, where they were produced. This is one found in Derry.
An item that's seldom offered for sale.
Three shallow chips on the underside of the cap, all smaller than a pinkie nail. Two small chips on tip/ends of ears, as seen in the first photo. Chips on reverse side of ears, as seen in third photo. Displays quite well.