Trafficator Switch

[Alan Stanley]

I am about to have a look at the clockwork traffictor switch this, it is a bit floppy, but before I pull it apart can anyone tell me what the thread is on the little screw that holds the knob on?
Also does it thread into the knob (arrow/jowett logo shaped)or into the shaft of the switch itself?

[Leo Bolter]

Hello Alan.

I have a spare (but not working) clockwork switch and a genuine black spear/arrow/logo knob, so I just when to the shed to check on it so I could, maybe, answer your questions.

1/ The shaft has a plain unthreaded 7/64" hole through it.

2/ The brass insert in the Bakerlite knob has had a thread in the outside part of the hole for the securing screw (where the screw enters), but unfortunately it's "gone" in the case of my knob . . . probably stripped. Incidentally, this hole in the knob does not pass beyond the metal shaft and into the brass on the other side of the shaft.

So, I'm sorry I'm not a great deal of help to you regarding the original thread and its size.

As it happens, to re-use my indicator knob would be a simple case of making a screw using any appropriate thread which incorporates a stepped down portion to accommodate the hole in the shaft. Or, as an alternative, the "far side" of the brass insert could be threaded for a screw with the outside diameter of 7/64" . . .

Cheers.
Leo.

[Leo Bolter]

Hi all.

When I have had a "floppy" knob in the past I have found in almost every case the clockwork actuating "hairpin" spring is broken. Occasionally though the spring is okay. I these cases I have found a good washing out of the dirt and dust accumulated over the years will revive it. A final rinse with a suitable CRC product has been used in the past, but maybe a new fangled Dry Lube like a Teflon aerosol spray might be better . . .

Does anyone else have a mechanism just needing a spring to make it work again?

Has anyone had success in hand making the springs, or are they procurable?

Leo.

[Tim Neville]

You might care to look at my Gallery album- Electrical - Trafficator switch.

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