Historical information
Cast brass, fitted with a cylindrical bush in the centre. Fitted to the end of a trolley pole with another cast item known as a hasp. The wheel runs along the underside of the copper trolley wire, and enables the tram to powered. See item 4809 for a SEC drawing of the item.
Significance
Demonstrates the mechanism by which the electrical power is transferred from the overhead to the tram itself.
Physical description
Cast brass wheel, with three spokes and hole in the centre for fitting to trolley pole.