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Cymber
United Kingdom
966 Posts |
 Posted - 06/12/2010 : 21:46:24
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The two upper switches are Push/Pull which is presumeably Pull ON but what action are the two lower indicator switches please. Forgive my ignorance but I never had more than the oil pressure gauge, horn button and ignition light of the original dashboard.
Maurice Blakey. |
Edited by - Cymber on 06/12/2010 21:47:18 |
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LewPalmer
USA
3244 Posts |
Posted - 06/12/2010 : 21:58:38
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They are momentary contact switches to operate the trafficators - one switch for each trafficator.
Lew Palmer
Registrar, NAMMMR |
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Cymber
United Kingdom
966 Posts |
Posted - 06/12/2010 : 22:24:43
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Thanks Lou.
That is just what I wanted them to be as I have an idea for an electronic flasher system with a timed cancel which would give Hazard warning by pressing both buttons. Unfortunately I don't know enough about modern electronics to design it but probably know someone who can.
Maurice. |
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ags
United Kingdom
275 Posts |
Posted - 07/12/2010 : 00:25:27
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Hi Lew,
You are right of course about the indicator switches, but one of the most amusing bits of MG sales literature is that they were sometimes described as "self cancelling". So they are, as naturally when you take your finger off the semaphore drops down.
Oh well, it makes me laugh - old age I expect.
More technical ramblings from
Andrew Smith MMM571 |
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LewPalmer
USA
3244 Posts |
Posted - 07/12/2010 : 03:30:08
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On my TD, I simply hooked an electronic beeper to the indicator on the instrument panel so as the signals flash the beeper sounds. Not exactly self cancelling, but certainly reminds me to turn them off.
Lew Palmer
Registrar, NAMMMR |
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whirlwind
New Zealand
94 Posts |
Posted - 07/12/2010 : 06:11:49
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I'm also looking at the problem of the momentary contact switches used for the trafficators. I thought about using them to control electronic flip-flops to give a push-On/push-Off function and (as mentioned by Lew) a buzzer/s to indicate that a traffictor was functioning.
I now intend to take a step backward in technology and use the front part of the momentary switch (to give the correct look) & connect it to a Lucas mechanical tumbler switch for the push-On/push-Off function.
Colin Smithson |
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Bob Stringfield
United Kingdom
854 Posts |
Posted - 07/12/2010 : 11:48:07
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Electronics are the coward's way out.
The digital determination needed to combine changing gear, manipulating the trafficator push-button in the full and certain knowledge that following traffic won't see the lit-up arm anyway is what makes the MMM driver grey-haired while keeping one young. Add frantic hand signals for the full experience.
On the other hand, most MMM car are very easy to drive when compared to, say, a pre-'30 Austin 7, for instance, where use of the handbrake to work the front brakes, foot pedal for the rear, a very wide-ratio three-speed plus an advance and retard lever and an absence of electric signals, let alone any of the more quirky pre-'30 motors with back to front 'boxes and central throttles.
Only an M-Type comes close. |
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Colin McLachlan
United Kingdom
991 Posts |
Posted - 07/12/2010 : 11:54:35
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Some time ago I fitted flashing indicators to my PA, with an old three way (non self cancelling) switch hidden just under the dashboard. To make sure I remember to cancel, I have wired this through the dashboard lights, and during the day I remove the diver's helmet in front of me, so that the light flashes in my line of sight.
I love the idea that the original system was "self cancelling"
Colin. |
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DickMorbey
United Kingdom
3677 Posts |
Posted - 07/12/2010 : 12:18:17
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I also fitted flashing indicators to my PA and added a repeater light on the dashboard. The repeater light was a bit intermittent (earthing problem? Who knows?!)
So I added an inexpensive bleeper (obtained from Maplin) to the circuit and that always seems to work OK, as you just can't forget that you are flashing!
Best wishes
Dick |
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Nick Feakes
USA
3376 Posts |
Posted - 07/12/2010 : 12:34:37
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Hi Maurice
Thank you for the update to my brain. For my rhombic panel I have two pull on / push off switches and two twist clockwise on / twist anti-clockwise off. I guess the twist switches are incorrect? I thought the problem was going to be how to remember to turn them off (light and/or loud clicker) but if my switches are wrong and the issue is how to make them stay on for a set number of seconds then an electronic solution is simple. Let me know about the switches and I will put some thought to a circuit.
Nick
Nostalgia just isn't what it used to be. |
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DickMorbey
United Kingdom
3677 Posts |
Posted - 07/12/2010 : 12:38:59
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Hi Nick
Sounds like you'll need another chapter or two for that book!
Best wishes
Dick |
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Nick Feakes
USA
3376 Posts |
Posted - 07/12/2010 : 13:44:49
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Hi Dick
Don't! It is already much bigger and taking much longer to write than I expected. Still, I have learned alot about other MMM models along the way and I am certain not to have all the details correct. I had better call it version 1?
Nick
Nostalgia just isn't what it used to be. |
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Oz34
United Kingdom
2543 Posts |
Posted - 07/12/2010 : 18:49:57
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The trouble with a timer is that, as with the vacuum one fitted to the MGA, it always turns itself off just as you reach the junction; unless of course you start indicating only yards before as so many seem to.
Throughout the '80s our family car was a Citroen whose indicators were specifically NOT self cancelling. You soon developed the habit of cancelling them after use. Unfortunately Citroen now follows the mainstream.
Dave |
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Nick Feakes
USA
3376 Posts |
Posted - 07/12/2010 : 20:40:46
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Hi Dave
Another option would be to have the switch arranged one press on, next press cancels?
Can you tell me if the turn signal switches should be momentary ON push switches?
Nick
Nostalgia just isn't what it used to be. |
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Dan F
USA
845 Posts |
Posted - 07/12/2010 : 20:52:32
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All very interesting. Does anyone have any pictures of what proper switches should look like ?
Thanks,
Dan |
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Nick Feakes
USA
3376 Posts |
Posted - 07/12/2010 : 21:21:01
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Dan
Yours may be correct, if someone can post a picture that will clear up yet another question.
Nick
Nostalgia just isn't what it used to be. |
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