Re: turn signal switch
Posted by HH56 On 2011/4/27 9:11:35
I believe all postwars cancel but with different ways. Some use the pin, others have a collar with a slot on the side to catch the switch cams & there may be another means as well. It all gets fuzzy and I have no photos of 48 & later switches or wheels to refresh the few active brain cells left.
Can't see the top side of the switch you posted but think there might be a spring loaded pivoting piece with a hook or more separate pieces at each end.
Here is a 47 wheel and switch using pins. On this version, in normal operation, it is as shown. When the lever is moved, it moves one of the triangular pieces out into the path of the pins. Turning the wheel in direction of signal and the pins pass the triangular pieces at the inner side of "V". The piece can pivot and slide out of the way to allow pins to pass. Turning wheel the other way to complete turn causes the pin to catch the triangular piece on the back flat side. Because it can't pivot the other direction, pin won't pass so the whole lever assy triangular pieces are attached to is moved or pivoted back at the center releasing the switch latch. Spring brings switch back to neutral position. All the switches work in a similar fashion but the details of cams and how the wheel catches the switch can differ considerably.
If the wheel and switch don't line up height wise, that can be one reason of no cancelling. If the pins fall out, that's another. If it uses a collar with slots and that has slipped is another. Also the usual possibility of broken or bent parts in the switch.
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Can't see the top side of the switch you posted but think there might be a spring loaded pivoting piece with a hook or more separate pieces at each end.
Here is a 47 wheel and switch using pins. On this version, in normal operation, it is as shown. When the lever is moved, it moves one of the triangular pieces out into the path of the pins. Turning the wheel in direction of signal and the pins pass the triangular pieces at the inner side of "V". The piece can pivot and slide out of the way to allow pins to pass. Turning wheel the other way to complete turn causes the pin to catch the triangular piece on the back flat side. Because it can't pivot the other direction, pin won't pass so the whole lever assy triangular pieces are attached to is moved or pivoted back at the center releasing the switch latch. Spring brings switch back to neutral position. All the switches work in a similar fashion but the details of cams and how the wheel catches the switch can differ considerably.
If the wheel and switch don't line up height wise, that can be one reason of no cancelling. If the pins fall out, that's another. If it uses a collar with slots and that has slipped is another. Also the usual possibility of broken or bent parts in the switch.
Attach file:
(24.58 KB)
(39.42 KB)
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