Electric brake lock question

H

heinz wittenbecher

New member
Mar 1, 1998
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I havn't finished wiring mine up yet.

I believe some of you have it installed and it's a momentary switch that
activates and holds it.
I'm guessing here but is it: hold switch to power on, apply brake, release
switch?
and how are the brakes released? Or is there a latching relay involved?

Mine is using an on-off toggle switch. (Kit purchased from Leigh Harrison)
I.e. turn switch on, apply brake
turn off switch to release brake.

As I only intend to use mine as an "on the go" parking brake I'm not
concerned about possible continous power consumption but rather the
possibility of accidental deployment. I.e. bump switch to on accidentally
and "whoa" the next time you apply the brakes.

I'm contemplating a lockout of some sort. Not sure what yet though. I would
only want to lock it out when actually moving so that eliminates shiftlever
and ignition. All ideas welcomed.

Another "simple" project gone amok :-)

Heinz
 
How about a microswitch on the transmission linkage?

> In a message dated 05/06/2000 4:51:42 PM Central Daylight Time,

>
> > I'm contemplating a lockout of some sort. Not sure what yet though. I would
> > only want to lock it out when actually moving so that eliminates shiftlever
> > and ignition. All ideas welcomed.
> >
> Heinz
>
> Right now all I can think of would be a simple sail switch up front some
> place. You know a flat piece of metal that would press on a micro switch.
> Holler if you need more details. I am a little tired right now.
>
> Take Care
> Arch
 
Very true, Arch -- good point. But at least if you are in park,
it does mean you're not going anywhere though. :-)

> In a message dated 05/06/2000 9:37:13 PM Central Daylight Time,

>
> > How about a microswitch on the transmission linkage?
> >
> Steve
>
> Just because you are in gear does not mean you are going
> anywhere.
>
> Take Care
> Arch
 
Thanks Arch.

Hadn't thought of that but I know what you mean.

Heinz

>
> > I'm contemplating a lockout of some sort. Not sure what yet though. I
would
> > only want to lock it out when actually moving so that eliminates
shiftlever
> > and ignition. All ideas welcomed.
> >
> Heinz
>
> Right now all I can think of would be a simple sail switch up front some
> place. You know a flat piece of metal that would press on a micro switch.
> Holler if you need more details. I am a little tired right now.
>
> Take Care
> Arch
>
 
> How about a microswitch on the transmission linkage?

Thought about that, but may want to use it to hold while tranny engaged at
times ( I think ). Have to ponder that possible requirement some more [g].

Heinz

>

>
> > In a message dated 05/06/2000 4:51:42 PM Central Daylight Time,

> >
> > > I'm contemplating a lockout of some sort. Not sure what yet though. I
would
> > > only want to lock it out when actually moving so that eliminates
shiftlever
> > > and ignition. All ideas welcomed.
> > >
> > Heinz
> >
> > Right now all I can think of would be a simple sail switch up front some
> > place. You know a flat piece of metal that would press on a micro
switch.
> > Holler if you need more details. I am a little tired right now.
> >
> > Take Care
> > Arch
>
>
 
Well, here's the simplest idea I've had so far: Use a switch with built in
LED to engage the brake in the first place. Or use a separately mounted small
LED in the dash panel. Best if it flashes any time the parking brake is
applied.

If you like, AND in (you're a computer guy, right?) an audible alarm from
the switch Rick talked about for the Drive selection. If the parking brake
switch is on blink the LED. If both Drive is selected AND the parking switch is
on then enable the audible alarm also.

Just an idea...

> > How about a microswitch on the transmission linkage?
>
> Thought about that, but may want to use it to hold while tranny engaged at
> times ( I think ). Have to ponder that possible requirement some more [g].
>
> Heinz
>
> >

> >
> > > In a message dated 05/06/2000 4:51:42 PM Central Daylight Time,

> > >
> > > > I'm contemplating a lockout of some sort. Not sure what yet though. I
> would
> > > > only want to lock it out when actually moving so that eliminates
> shiftlever
> > > > and ignition. All ideas welcomed.
> > > >
> > > Heinz
> > >
> > > Right now all I can think of would be a simple sail switch up front some
> > > place. You know a flat piece of metal that would press on a micro
> switch.
> > > Holler if you need more details. I am a little tired right now.
> > >
> > > Take Care
> > > Arch
> >
> >
 
Heinz,
Aircraft have used in line hydraulic parking brakes for over a half century.
They all work by pressing the brake pedal, engage the brake valve, release
the pedal. System stays locked until pressing hard on the brakes which
releases the valve. There is no way they can inadvertently apply your
brakes and so no safety interlocks are necessary. If your valve doesn't
operate this way, I think you should get a valve that does.
Bob McLaughlin

- -----Original Message-----
From: owner-gmcmotorhome
[mailto:owner-gmcmotorhome]On Behalf Of Heinz
Wittenbecher
Sent: Sunday, May 07, 2000 12:01 AM
To: gmcmotorhome
Subject: Re: GMC: Electric brake lock question

> How about a microswitch on the transmission linkage?

Thought about that, but may want to use it to hold while tranny engaged at
times ( I think ). Have to ponder that possible requirement some more [g].

Heinz

>

>
> > In a message dated 05/06/2000 4:51:42 PM Central Daylight Time,

> >
> > > I'm contemplating a lockout of some sort. Not sure what yet though. I
would
> > > only want to lock it out when actually moving so that eliminates
shiftlever
> > > and ignition. All ideas welcomed.
> > >
> > Heinz
> >
> > Right now all I can think of would be a simple sail switch up front some
> > place. You know a flat piece of metal that would press on a micro
switch.
> > Holler if you need more details. I am a little tired right now.
> >
> > Take Care
> > Arch
>
>
 
I'm not concerned with intentional applications and warning when applied.
That part is under control.

It's the possibility of engaging unintentionally, or rather 'arming' the
valve accidentally and then have it apply at first braked pedal application.

Until I can think of a better way I'll probably use the neutral switch or
I'll build an air-switch. Unfortunately the air-switch would need extra
stuff to make it fail-safe.

Going to explorer a few of the ideas that have surfaced sofar.

Thanks to all for the feedback and comments.

Heinz

P.S. keep 'em coming as this is probably going to be some future project.
Going to leave it disconnected for now.

> Well, here's the simplest idea I've had so far: Use a switch with
built in
> LED to engage the brake in the first place. Or use a separately mounted
small
> LED in the dash panel. Best if it flashes any time the parking brake is
> applied.
>
> If you like, AND in (you're a computer guy, right?) an audible alarm
from
> the switch Rick talked about for the Drive selection. If the parking
brake
> switch is on blink the LED. If both Drive is selected AND the parking
switch is
> on then enable the audible alarm also.
>
> Just an idea...
>

>
> > > How about a microswitch on the transmission linkage?
> >
> > Thought about that, but may want to use it to hold while tranny engaged
at
> > times ( I think ). Have to ponder that possible requirement some more
[g].
> >
> > Heinz
> >
> > >

> > >
> > > > In a message dated 05/06/2000 4:51:42 PM Central Daylight Time,

> > > >
> > > > > I'm contemplating a lockout of some sort. Not sure what yet
though. I
> > would
> > > > > only want to lock it out when actually moving so that eliminates
> > shiftlever
> > > > > and ignition. All ideas welcomed.
> > > > >
> > > > Heinz
> > > >
> > > > Right now all I can think of would be a simple sail switch up front
some
> > > > place. You know a flat piece of metal that would press on a micro
> > switch.
> > > > Holler if you need more details. I am a little tired right now.
> > > >
> > > > Take Care
> > > > Arch
> > >
> > >
>
>
 
Most of those were mechanically applied though, at least in the ones I flew.

I'm still hoping to hear from some folks that have an inline valve of some
sort already installed with a brief description of how theirs works.

Heinz

> Heinz,
> Aircraft have used in line hydraulic parking brakes for over a half
century.
> They all work by pressing the brake pedal, engage the brake valve, release
> the pedal. System stays locked until pressing hard on the brakes which
> releases the valve. There is no way they can inadvertently apply your
> brakes and so no safety interlocks are necessary. If your valve doesn't
> operate this way, I think you should get a valve that does.
> Bob McLaughlin
>
> -----Original Message-----
> From: owner-gmcmotorhome
> [mailto:owner-gmcmotorhome]On Behalf Of Heinz
> Wittenbecher
> Sent: Sunday, May 07, 2000 12:01 AM
> To: gmcmotorhome
> Subject: Re: GMC: Electric brake lock question
>
>
>
> > How about a microswitch on the transmission linkage?
>
> Thought about that, but may want to use it to hold while tranny engaged at
> times ( I think ). Have to ponder that possible requirement some more [g].
>
> Heinz
>
>
>
> >

> >
> > > In a message dated 05/06/2000 4:51:42 PM Central Daylight Time,

> > >
> > > > I'm contemplating a lockout of some sort. Not sure what yet though.
I
> would
> > > > only want to lock it out when actually moving so that eliminates
> shiftlever
> > > > and ignition. All ideas welcomed.
> > > >
> > > Heinz
> > >
> > > Right now all I can think of would be a simple sail switch up front
some
> > > place. You know a flat piece of metal that would press on a micro
> switch.
> > > Holler if you need more details. I am a little tired right now.
> > >
> > > Take Care
> > > Arch
> >
> >
>
>
 
That's where I'm currently at... a simple on-off switch, but concerned about
accidental activation/arming.

Maybe I'll just get a safety type toggle switch, i.e. pull out/lift over.

Heinz

> Easy way to do it is to use a Biondo Racing Products line lock, summit
book
> page 159 price $49.95. Rated at 3,000PSI and can be actuated with a simple
> on and off switch. 1-800-230-3030 for ordering.
>
>

> >
> >> How about a microswitch on the transmission linkage?
> >
> >Thought about that, but may want to use it to hold while tranny engaged
at
> >times ( I think ). Have to ponder that possible requirement some more
[g].
> >
> >Heinz
> >
> >
> >
> >>

> >>
> >> > In a message dated 05/06/2000 4:51:42 PM Central Daylight Time,

> >> >
> >> > > I'm contemplating a lockout of some sort. Not sure what yet though.
I
> >would
> >> > > only want to lock it out when actually moving so that eliminates
> >shiftlever
> >> > > and ignition. All ideas welcomed.
> >> > >
> >> > Heinz
> >> >
> >> > Right now all I can think of would be a simple sail switch up front
some
> >> > place. You know a flat piece of metal that would press on a micro
> >switch.
> >> > Holler if you need more details. I am a little tired right now.
> >> >
> >> > Take Care
> >> > Arch
> >>
> >>
> >
> >
> >
>
>
 
Heinz
Thought it over. This is for you, use the same application as a after
market cruise control sensor only use it on one of the drive shafts. The
magnet and pick up are used as a small generator for current. Your
application will be as Cmos and, or gate. shouldn't be to bad to
whip up. Or if you just want it to be simple current for lock out relay.

Gary 76 Glen Duvall WA.
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>
>> It's the possibility of engaging unintentionally, or rather 'arming' the
>> valve accidentally and then have it apply at first braked pedal
> application.
>
> Heinz,
> Don't those brake valves "hold" without power once set? I thought the
> usual procedure was to use a momentary-contact pushbutton switch to energize
> the valve.


That was my understanding too but when the kit arrived it had a toggle
switch with ON/OFF

Heinz




> That way there's no chance of accidental application/locking.
> You must hold the switch "on" while applying and releasing the brake pedal,
> then release the switch, to lock the brakes.
> Of course you wouldn't want a toggle type switch, as it could act as you
> describe. Maybe I'm wrong, but this doesn't seem so complicated.
>
> HTH.
>
> Rick Staples
> '75 Eleganza
> Louisville, CO
>
 
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