Ending thursday at 5 04pm pdt 3d 16h.
Ceramic telegraph wire insulators.
Vintage electric ceramic glaze telephone telegraph pole insulator cap brown 19 49 1900 s hemingray 42 usa 24 48 telephone insulator 4 x 3 5 glass bead bottom.
Insulators were first developed in the mid 1800s to be used on telegraph and telephone lines to contain the electrical current and prevent the current from entering the ground below.
Similar to their glass counterparts porcelain insulators date back to before the civil war for telegraph wires.
19 blue green usa telegraph phone electric.
Lot of 3 vtg antique ohio brass knox guy wire insulators ceramic porcelain brown.
Vintage hemingray glass insulator no.
Electric wire insulator brown porcelain ceramic telephone telegraph railroad railway farm threaded lag bolt antique electricity utility.
Nice blue telegraph glass insulator cd 565 1 ussr soviet russian.
In north america glass was always the predominate material for communications insulators but porcelain has become the standard for power distribution due to its greater strength and surface resistance.
Set of 2 1930 s large aqua telegraph wire insulators for making light fixtures projects moderncharminteriors.
Vintage porcelain glass insulator with telegraph wire still attached.
Vintage locke porcelain ceramic insulator usa 9995 brown telegraph electric e2.