Ingraham mantel escapement

[George Schultz]

I cant seem to work this problem out.The escape wheel has 48 teeth and it has a recoil verge escapement.The diameter of the wheel is 1.500". I set the distance between the pallet faces at .689"(I used the method to compute this measurment from Steven conover clock repair basics)I can get the escape wheel to go 2 revs before it stops. What did I overlook? I would like to replace the wheel and verges if I could find one.Can any one help me George

[shutterbug]

You need exactly 90 degrees on one pallet, and all the adjustments should be made on the other one. I assume that since it makes at least one full revolution that the EW and verge are working together as required. Look at the depth. You need the pallets to enter the EW far enough to impulse, and may have to move the verge pivot point into the wheel further. I'm also assuming that you've cleaned the movement and made any necessary repairs, and that the clock is in beat. Check all of these points and get back to us, OK? :smile:

[Scottie-TX]

The angle of both pallets described here - IFF you don't have a HALF DEADBEAT escapement (teeth point TO direction of rotation and both pallets curved for a half deadbeat), then your verge should mirror these two angles closely.
http://static.flickr.com/51/129247600_412fee30df.jpg

[George Schultz]

Scottie and shutterbug ;thanks for your reply. the verge on this clock has the exit pallet with the same configuration as the entry pallet.Could this be the way it was originally made?Should I staiten the exit pallet to 90 deg. it will spread to more teeth engagement,will that make a differance on the lenth of the pendulum required? George

[George Schultz]

After reading again the Hulsey's page that you sent me ,Do you suppose that because the exit pallet is not 90degs.it is a half deadbeat escapement? How do you tell the differance between a deadbeat and halfbeat beat George

[Scottie-TX]

I can pretty much guarantee yours is half deadbeat, in which case NEITHER pallet is set to 90degs. The "key" here is that you say both pallets are curved. Clue 1 - half deadbeat. Now you'll notice clue #2; Teeth point TO direction of wheel rotation and not away from it.

[shutterbug]

Yes, I think you may have called it a recoil in error. The half dead-beat is a whole different animal. You need to calculate 1/4 of the diameter, so your verge should encompass 12 teeth. The impulse surfaces should be right at 2 degrees. I'm still working all of this out on my half dead-beats too, and found David LaBounty and his web site very enlightening. Try emailing him for some better specifics.

[harold bain]

George, if it runs through 2 or3 revolutions, you may have a power problem. What exactly have you done in the way of repairs to this movement?
We recently had a thread here about this half-deadbeat movement. Don't make any adjustments to the verge unless you are very sure they are needed. Escapewheel and verge seldom are the reason that a clock won't run.
Harold

[George Schultz]

guys thanks for your info. when I was fooling with the clock I tried to polish the verge and escape wheel I must have changed the angle of the impulse faces on the entry and exit faces. Refiling the faces did the trick.Got good info from conovers clock repair basics pages 43 44.Thanks again George

[W.R. WoodWorking]

you might want to look at your EW teeth. you might have bent the tip on one or two.

[Scottie-TX]

. . . . . . . . .and thank YOU very much, Mr. SCHULZ! Thank you for reminding me (us) we already have it in our library and I didn't even recall. I copied it to my laptop for future ref.
However: Don't be so hard on yourself. I SERIOUSLY doubt you bent it or misshaped it JUST polishing it. I sense someone else bent it and that's how you found it after polishing!
NICE WORK SIR! 'n ya didn't even need an escape wheel!

[George Schultz]

I'ts been running strong now for 24 hours, adjusting pend lenth for time accuracy Looks like a success Thanks again everybody... George

[Scottie-TX]

I don't believe I've ever had a half deadbeat here. Just outta curiosity, what kind of pendulum motion does it exhibit? About an inch of swing total? More? A lot of overswing?
It's my understanding that most of these have impulse on only one pallet - usually the exit pallet and that the exit pallet can sometime be either recoil or deadbeat. Also that the entrance pallet since it doesn't impulse, will only be a dead face. Is that what you see here?

[harold bain]

Scottie, I have 3 of them running here, and they have as much swing as any other mantel clock. All 3 are Ingrahams, with the thumbscrew regulator on the dial. Not uncommon movements.
I have one with no mainspring that I just checked, and it impulses on both pallets (you can feel it when you put pressure on the time second wheel and feel the crutch).
Harold

[Kevin W.]

Harold i have a Ingraham it does not have the thumb screw regulator you mentioned.Could you post a photo of yours?

[harold bain]

Veritas, do a search on the message board for "Ingraham escapement puzzle" from September of this year for some good pix of these movements and verge shape.
Harold