Q. How to spring load turnout points?

Q. How to spring load turnout points?

Post by Mike Maddefo » Thu, 27 Nov 1997 04:00:00



Help!!  I have built 8 turnouts and have them installed already.  I haven't put in the throw bar yet.  I was going to use store bought ground throws but discovered that they are too big to fit between my 2" centers track.  So it looks like I have to build my system.  I don't want to use the slide switches because I want the facia left clean.  So any ideas?  PLEASE HELP!      


Thanks

 
 
 

Q. How to spring load turnout points?

Post by Charles A. Davi » Thu, 27 Nov 1997 04:00:00


Quote:

> Hey now this sounds good.  Only thing is I can't understand what you mean. ;).


> >Try bending a short piece of stiff thin wire in a shallow inverted V-shape,
> >leaving 2 legs, one just as long as your ties are deep, and the other about an
> >inch long (enough to pass through the roadbed)

> OK an upside down "V" with one leg 1/8" long and the other 1"

> . Throw your switch to either
> >side. Drill a small hole in the roadbed ahead of your throwbar,

> Is this hole drilled down?
>  far enough so
> >that when the short leg is in the hole in the center of the throwbar, the
> >longer leg drops into the hole.

> The long leg goes down in the roadbed?

>  You should now be able to pivot the switch
> >points by hand, with the V spring keeping the points tight against the rails.
> >This has been used several times in MRR projects; hope I got this right from
> >memory! Good luck, CR

> Like I said before, it sound good and I hope you can explain it to me.  Thanks for
> your help.



Painfully drawn ASCII art below

                   throw bar
                         |
        _________________|_____________
                         | \
   holes & spring ---> o^o  \      thru track
        _________________|___\_________
                         |\   \
                           \   \
                            \   \
                           diverging track

Now for the description part.

The two holes are BOTH _on centerline_.

The deep hole goes into a tie for stability, and through the roadbed.
The other hole goes through the 'throw bar' _at it's center (between the
points).

In operation, when the 'throw bar' _PASSES_ the center of it's throw, it
is compressed as much as it ever sees. Either side of the center
position, it expands, and in so doing, pushes the 'point assy. sideways.

Chuck

--
-----------------------------------------------------------
He, who will not reason, is a bigot;       William Drumond,
he, who cannot, is a fool;                  Scottish writer
and he, who dares not, is a slave.              (1585-1649)
While he that does, is a free man!          Joseph P. 1955-
-----------------------------------------------------------
Chuck Davis  /  Sutherlin Industries   FAX # (804) 799-0940

Sutherlin, ***ia 24594            Voice # (804) 799-5803

 
 
 

Q. How to spring load turnout points?

Post by C. Ro » Fri, 28 Nov 1997 04:00:00


Try bending a short piece of stiff thin wire in a shallow inverted V-shape,
leaving 2 legs, one just as long as your ties are deep, and the other about an
inch long (enough to pass through the roadbed). Throw your switch to either
side. Drill a small hole in the roadbed ahead of your throwbar, far enough so
that when the short leg is in the hole in the center of the throwbar, the
longer leg drops into the hole. You should now be able to pivot the switch
points by hand, with the V spring keeping the points tight against the rails.
This has been used several times in MRR projects; hope I got this right from
memory! Good luck, CR


Quote:

>Help!!  I have built 8 turnouts and have them installed already.  I haven't put
> in the throw bar yet.  I was going to use store bought ground throws but
> discovered that they are too big to fit between my 2" centers track.  So it
> looks like I have to build my system.  I don't want to use the slide switches
> because I want the facia left clean.  So any ideas?  PLEASE HELP!    


>Thanks

 
 
 

Q. How to spring load turnout points?

Post by Mike Maddefo » Fri, 28 Nov 1997 04:00:00


Hey now this sounds good.  Only thing is I can't understand what you mean. ;).


Quote:

>Try bending a short piece of stiff thin wire in a shallow inverted V-shape,
>leaving 2 legs, one just as long as your ties are deep, and the other about an
>inch long (enough to pass through the roadbed)

OK an upside down "V" with one leg 1/8" long and the other 1"

. Throw your switch to either

Quote:
>side. Drill a small hole in the roadbed ahead of your throwbar,

Is this hole drilled down?
 far enough so

Quote:
>that when the short leg is in the hole in the center of the throwbar, the
>longer leg drops into the hole.

The long leg goes down in the roadbed?

 You should now be able to pivot the switch

Quote:
>points by hand, with the V spring keeping the points tight against the rails.
>This has been used several times in MRR projects; hope I got this right from
>memory! Good luck, CR

Like I said before, it sound good and I hope you can explain it to me.  Thanks for
your help.


 
 
 

Q. How to spring load turnout points?

Post by C. Ro » Sat, 29 Nov 1997 04:00:00


Here is an attempt at a diagram:

_______ /\ ______ (track level)
               |  '

The V above is too exaggerated; the real one shoud be flatter. The
longer vertical leg at the left is the one going through the roadbed. The
shorter vertical  leg on the right is the one through the throwbar only so it
can slide with the throwbar as the switch is thrown. Hope this helps, CR


Quote:

>Hey now this sounds good.  Only thing is I can't understand what you mean. ;).


>>Try bending a short piece of stiff thin wire in a shallow inverted V-shape,
>>leaving 2 legs, one just as long as your ties are deep, and the other about an

>>inch long (enough to pass through the roadbed)

>OK an upside down "V" with one leg 1/8" long and the other 1"

>.. Throw your switch to either
>>side. Drill a small hole in the roadbed ahead of your throwbar,

>Is this hole drilled down?
> far enough so
>>that when the short leg is in the hole in the center of the throwbar, the
>>longer leg drops into the hole.

>The long leg goes down in the roadbed?

> You should now be able to pivot the switch
>>points by hand, with the V spring keeping the points tight against the rails.
>>This has been used several times in MRR projects; hope I got this right from
>>memory! Good luck, CR

>Like I said before, it sound good and I hope you can explain it to me.  Thanks
> for
>your help.



 
 
 

Q. How to spring load turnout points?

Post by David Breez » Sat, 29 Nov 1997 04:00:00



Quote:
>Hey now this sounds good.  Only thing is I can't understand what you mean. ;).


<snipped>

> You should now be able to pivot the switch
>>points by hand, with the V spring keeping the points tight against the rails.
>>This has been used several times in MRR projects; hope I got this right from
>>memory! Good luck, CR

>Like I said before, it sound good and I hope you can explain it to me.  Thanks
>for
>your help.



If i'm thinking of ther right thing, the bit of wire should look like
this dodgy 3D ASCII diagram(!):
______
|    /
    /
   /
   |
   |
   |

The same thing is used in Peco and Micro-Engineering turnouts.
--
Dave Breeze
Glasgow,
Scotland                D&RGW in N-scale, status: lots of plywood, some track.