Horn
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Topic author - Posts: 271
- Joined: Mon Jan 07, 2019 7:51 am
- First Name: Dick
- Last Name: Cruickshank
- * REQUIRED* Type and Year of Model Ts owned: 1912 Depot Hack, 1916 Touring
- Location: Angier NC
Horn
My horn would just about spin to make a noise you could hardly hear.. Took it apart, cleaned the armature and established the brushes looked good and made contact. put it back together and restored power to it. It now spins freely but all I hear is the spinning motor and no horn sound. What am I missing.
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- First Name: Mark
- Last Name: Gregush
- * REQUIRED* Type and Year of Model Ts owned: 1925 cutdown PU, 1920 Dodge touring, 1948 F2 Ford flat head 6 pickup 3 speed
- Location: Portland Or
- MTFCA Number: 52564
- Board Member Since: 1999
Re: Horn
What is missing is lack of information on WHAT kind of horn you are asking about. Model T's didn't use a motor driven horn. Different horns have different adjustments so need to know before making suggestions. Does it have an adjustment on the diaphragm or?
I know the voices aren't real but damn they have some good ideas!
1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup
1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup
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Topic author - Posts: 271
- Joined: Mon Jan 07, 2019 7:51 am
- First Name: Dick
- Last Name: Cruickshank
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Re: Horn
Mark, the horn is on a 1925 coupe that I just bought. When I took it apart, there is a field coil, an attached armature with brushes. That sounds like and looks like a motor. When power is applied and the horn button is pushed, this "motor" spins. What do you call it if not a motor?
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- First Name: Steve
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Re: Horn
Dick, the spinning motor should have something adjustable that contacts the diaphragm to vibrate it. Mine just needed a bit of 3 in 1 oil to make it work.
https://www.youtube.com/watch?v=DKzJP6XJIVY
https://www.youtube.com/watch?v=DKzJP6XJIVY
The inevitable often happens.
1915 Runabout
1923 Touring
1915 Runabout
1923 Touring
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Re: Horn
What brand? What you are describing is not a Model T horn. Model T horns used an electromagnet that pull the diaphragm back and forth. Please read my first post, there are different adjustments to make it work/sound depending on what brand it is. I did not say it was not a motor driven horn.
I know the voices aren't real but damn they have some good ideas!
1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup
1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup
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- Last Name: Patterson
- * REQUIRED* Type and Year of Model Ts owned: 1920 Canadian Touring 1926 Canadian TT Grain truck
- Location: Grande Cache, Alberta, Canada.
Re: Horn
The DC battery horn (motor driven) was introduced around 1920, earlier horns were AC (magneto) a forum search brings up lots of information.
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Re: Horn
DickC,
Your post describes your horn as motor driven (DC) and not magneto driven (AC)
You have most probably fitted the diaphragm on incorrectly. On the diaphragm on one side there will be an anvil (piece of hard tooth shaped steel) which the motor driven (tooth shaped) wheel strikes and causes the sounding noise.
Rotate the diaphragm until the anvil contacts the armature wheel teeth at right angles (Just have to touch the tip of the teeth) You could find an adjustment screw on the motor case near the commutator.
Screw the adjusting screw in and out for your desired sound....N..
r
Your post describes your horn as motor driven (DC) and not magneto driven (AC)
You have most probably fitted the diaphragm on incorrectly. On the diaphragm on one side there will be an anvil (piece of hard tooth shaped steel) which the motor driven (tooth shaped) wheel strikes and causes the sounding noise.
Rotate the diaphragm until the anvil contacts the armature wheel teeth at right angles (Just have to touch the tip of the teeth) You could find an adjustment screw on the motor case near the commutator.
Screw the adjusting screw in and out for your desired sound....N..
r
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Re: Horn
US battery horns were never motor driven horns. They still used the electromagnet setup only had points that opened as the diaphragm was pulled by the magnet and closed when it sprung back.
I know the voices aren't real but damn they have some good ideas!
1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup
1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup
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- First Name: David
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Re: Horn
We have established that it is a motor driven horn, so let's help him with that and not with what "should" be there.
Motor driven "Klaxons" make sound by striking a "tit" on the diaphragm, they usually turn a wavy washer on the motor shaft to do this. The diaphragm must have paper gaskets, one each side, to allow it to sound properly. there usually is an adjustment for the motor to strike the diaphragm--on most period horns this is a screw that pushes against the motor shaft, often times the screw goes through the cover to make adjusting easy. On later models, the tit on the diaphragm is threaded and has to be adjusted, usually by using a long socket to reach inside the horn.
Now sometime the adjusting screw actually bears on a ball bearing on the motor shaft for less friction--if you loose that single little ball, you'll have to find another one (bicycle shops used to have these loose).
Motor driven "Klaxons" make sound by striking a "tit" on the diaphragm, they usually turn a wavy washer on the motor shaft to do this. The diaphragm must have paper gaskets, one each side, to allow it to sound properly. there usually is an adjustment for the motor to strike the diaphragm--on most period horns this is a screw that pushes against the motor shaft, often times the screw goes through the cover to make adjusting easy. On later models, the tit on the diaphragm is threaded and has to be adjusted, usually by using a long socket to reach inside the horn.
Now sometime the adjusting screw actually bears on a ball bearing on the motor shaft for less friction--if you loose that single little ball, you'll have to find another one (bicycle shops used to have these loose).
T'ake care,
David Dewey
David Dewey
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Re: Horn
Sorry I was just trying to find out what brand of aftermarket horn it was to better help him. Poppie and Davids instructions should cover most of them.
I know the voices aren't real but damn they have some good ideas!
1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup
1925 Cut down pickup
1920 Dodge touring
1948 Ford F2 pickup
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Re: Horn
Semi Related -
I have a "hand klaxon" that soounds like an anemic duck on it's last leg... I tried adjusting the center nut & screw, but it only proceeded to lock it up. Loosening it so it would run went back at best to the sad sound it almost makes... I'm kind of at a loss, as there doesn't seem to be a middle ground between silence and great-grandma ewe on her last breath...
I have a "hand klaxon" that soounds like an anemic duck on it's last leg... I tried adjusting the center nut & screw, but it only proceeded to lock it up. Loosening it so it would run went back at best to the sad sound it almost makes... I'm kind of at a loss, as there doesn't seem to be a middle ground between silence and great-grandma ewe on her last breath...