On 22/05/2018 12:46 PM, Roger Greenwood wrote:
>

>

> A downside of swivel-head trolley poles was the necessity to employ switchable overhead frogs to guide the pole to the desired route. These were generally spring-loaded to favour the most-used route but for the lesser-used direction a pole-mounted lever was held by the conductor who had to make it back on board after his tram had cleared the frog.

>

The only place I have seen swivel heads in use on trams is in Hong Kong.

A couple of pics show, firstly, the swivel head approaching a switch and secondly, the metrhod of operation of the switch - via a bit of bike chain no doubt controlled by the same circuitry as the points in the tramway.

Mal Rowe - who reckons non-swivel heads work just fine for trams