How is this stop key work

texasbagpiper · Post by **texasbagpiper** » Thu Mar 10, 2005 1:31 pm

Does anyone know the construction of this chanter top, I dont see how it works with the tubing at the top...instead of the side

http://www.kirklynch.com/engr14.htm

Cayden · Post by **Cayden** » Thu Mar 10, 2005 1:35 pm

There's a number of different options there but you will only know if you look inside. Usually there is a stop valve like in the bellows and blowpipe that closes when the key is opened, cutting off the airflow to the reed.

djm · Post by **djm** » Thu Mar 10, 2005 1:39 pm

As Peter says, a stop valve. Usually the top of the key is connected to a stiff wire that runs inside the top of the cap. The wire runs through a leather flap. When you press the key, the wire pulls the leather flap shut against the top inside the cap.

djm

texasbagpiper · Post by **texasbagpiper** » Thu Mar 10, 2005 1:40 pm

These are some plans for stop keys that Im used to seeing

http://www.bagpipeworld.co.uk/Plans/StopSwitch.htm

Cayden · Post by **Cayden** » Thu Mar 10, 2005 1:43 pm

djm wrote:As Peter says, a stop valve. Usually the top of the key is connected to a stiff wire that runs inside the top of the cap. The wire runs through a leather flap. When you press the key, the wire pulls the leather flap shut against the top inside the cap.

djm

Only usually because Joe copied geoff's present set up

Mine uses a different system, copied from Egan I think, involving a little hinge like thingy that pushes the valve up when the key is closed but swings out when the key opens, allowing the air to push down the valve. I have seen yet other systems but am not sure i can remember the details involved.

djm · Post by **djm** » Thu Mar 10, 2005 2:35 pm

If you're going to copy, copy from the best!

djm

PJ · Post by PJ » Thu Mar 10, 2005 2:49 pm

That's a nice chanter top. Are there may makers who do this? I've thought of having similar work done to the WOOD of my chanter, but I don't know anyone who has the skill and the time to do it.

srfmowman · Post by **srfmowman** » Thu Mar 10, 2005 3:00 pm

My CR chanter has a little brass triangle that hangs from a pin beneath a leather flap. The stop key has a little finger on it that pushes one side of the triangle causing the other side of the triangle to push the leather flap up. When the key is pressed it allows the triangle to swing down thus allowing the air pressure to close the flap. I don't know who designed it but it is a elegant little piece of engineering.

John

Cayden · Post by **Cayden** » Thu Mar 10, 2005 3:11 pm

That's similar to mine only the thingy is more L shaped

Patrick D'Arcy · Post by **Patrick D'Arcy** » Thu Mar 10, 2005 3:36 pm

Here is the internal mechanism on my K&Q chanter.... clever little thing

http://www.uilleannobsession.com/photos ... e1bw_1.jpg
http://www.uilleannobsession.com/photos ... e2bw_1.jpg
http://www.uilleannobsession.com/photos ... e5bw_1.jpg
http://www.uilleannobsession.com/photos ... e6bw_1.jpg

I wasn't able to post as img's? Por que?

PD.

Kevin Popejoy · Post by **Kevin Popejoy** » Thu Mar 10, 2005 4:22 pm

Quinn told me at some point that's a Harrington method. k

Joseph E. Smith · Post by **Joseph E. Smith** » Thu Mar 10, 2005 4:40 pm

Patrick D'Arcy wrote: I wasn't able to post as img's? Por que?

PD.

Tony · Post by **Tony** » Thu Mar 10, 2005 4:41 pm

Texas,
have a look at this previous discussion:
http://chiffboard.mati.ca/viewtopic.php ... 7a8#136046
Chris Bayley submitted some great details to stop keys.

DMQuinn · Post by **DMQuinn** » Thu Mar 10, 2005 6:28 pm

Kevin Popejoy wrote:Quinn told me at some point that's a Harrington method. k

The supposed Harrington valve that I saw, and upon which I based a design I executed many times, was most similar to Diagram E on Chris Bayley's drawings. It had a wedge, just as can be seen in the pictures Pat D'Arcy has put up, but the wedge was not attached to the valve piston.

Pat's pictures show what I've been doing lately for a shut-off valve. The throw rod is linked to the wedge, and onto the throw rod is threaded a rubber ball which serves as the valve seal. It rests in a conical seat, so I'm hoping it will go where it's supposed to go every time.

Patrick D'Arcy · Post by **Patrick D'Arcy** » Thu Mar 10, 2005 6:41 pm

And (btw) it works a treat

Pat.