[PRCo] Re: Trolley question

[Schneider Fred]

OK, so then Crich simply put the pole where they wanted it.

On Feb 3, 2009, at 5:47 PM, TEP wrote:

> Fred, Leeds used bow collectors in the later years, including the  
> ex LT
> Felthams.
> Tom Parkinson
> --------------------------
>
> Schneider Fred wrote:
>> To elaborate on Phil's comment, London England used to use swivel
>> shoes with wheels on their tram cars, principally because their poles
>> were not centered in the middle of the cars but off to the side and
>> the harp had to allow the wheel to swivel from side to side to enable
>> it to run tangent to the wire.   I looked on line for you tube videos
>> of London and the closest I can find is the one that Derrick posted
>> earlier today ... The Elephant Never Forgets ... reposted below.
>> Look closely and you will see the mammoth harp.
>>
>> http://www.youtube.com/watch?v=a7lK2tDglXQ&feature=related
>>
>> There is a tape of Metropolitan 331 at Crich but it was a car that
>> went from London to, I believe, Leeds and then came to the museum and
>> was repainted as a London car.   John will be sure to correct me if
>> I'm wrong.   I'm pretty sure that the pole was properly centered in
>> Leeds and it was never fully restored to its London configuration.
>> The museum at Crich was started in the early 1960s, a decade after
>> the last London cars ran and the ones they have came home from
>> somewhere else or were rebuilt from outbuildings or sheds.
>>
>>
>>
>>
>> On Feb 3, 2009, at 2:42 PM, Phillip Clark Campbell wrote:
>>
>>
>>>> ----- Original Message ----
>>>>
>>>> From: ROBERT R ROCKWELL <w3syt1 at msn.com>
>>>> To: pittsburgh-railways <pittsburgh-railways at dementia.org>
>>>> Sent: Tuesday, February 3, 2009 10:49:36 AM
>>>> Subject: [PRCo] Trolley question
>>>>
>>>>
>>> Mr.Rockwell:
>>>
>>> My first answer to each question is for streetcars and the second
>>> one is for
>>> trolleybuses but there are always exceptions aren't there.
>>>
>>>
>>>> Does the trolley wheel harp or slider swivel on the pole ?
>>>>
>>> No for streetcars
>>> Yes for TBs
>>> Some streetcars retrofitted with swivel harps.
>>>
>>>
>>>> Does the pole swivel in the base?
>>>>
>>> Pole is clamped into the base for both streetcar and bus.
>>>
>>>
>>>
>>>> Does the spring loaded base assembly swivel on the car roof ?
>>>>
>>>>
>>> Yes, the base moves to allow movement of the pole.  There is a
>>> shunt attached
>>> to the base so current is routed around bearings otherwise they
>>> would arc, pit, and
>>> eventually freeze.  This shunt will limit how far the pole can move
>>> but it is generally
>>> arranged so it can turn 180-degrees and operate from that position
>>> if necessary.
>>>
>>>
>>> Phil
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>
>>
>>
>>
>
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