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Originally Posted By: Dewey Vicknair
Originally Posted By: 2-piper
Dewey;
I have springs on items from the 1850's thru 1870's (Not gun related) which are I believe called convolute springs. These springs are wound in a cone shape from flat stock much like a clock spring. They however work by compression & not by winding up as in a clock spring. So, what action would you call them, I see absolutely no evidence of torsional movement as they are compressed & this should show on the wide, thin cross section if it were present.
From the French word meaning "turn"-- A "Grande Volute Salon" is what the Frogs call "A big ball room"--kinda like Arnold's jockstrap I might wager!!

Now we're into some different stuff! What you're referring to are called "volute" springs. These are basically a very thin "beam" wound into a spiral coil. When compressed, one "side" (it's wound in a spiral) is placed in compression while the opposing side is placed in tension, thus mimicking beam loading but not in a planar fashion.


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It has been noted that at least in a compression application, a broken coil spring would still function, whereas a leaf type would not. It stands to reason though that the function would be affected by the broken coil spring being effectively shorter in length and thus stiffer?

Mike


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Originally Posted By: wingshooter16
It has been noted that at least in a compression application, a broken coil spring would still function, whereas a leaf type would not. It stands to reason though that the function would be affected by the broken coil spring being effectively shorter in length and thus stiffer?

Mike
It functions only because it is entrapped- no where to open to full uncompressed length-no other reason.


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Dewey Vicknair
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Originally Posted By: Run With The Fox
Originally Posted By: Dewey Vicknair
Originally Posted By: 2-piper
Dewey;
I have springs on items from the 1850's thru 1870's (Not gun related) which are I believe called convolute springs. These springs are wound in a cone shape from flat stock much like a clock spring. They however work by compression & not by winding up as in a clock spring. So, what action would you call them, I see absolutely no evidence of torsional movement as they are compressed & this should show on the wide, thin cross section if it were present.
From the French word meaning "turn"-- A "Grande Volute Salon" is what the Frogs call "A big ball room"--kinda like Arnold's jockstrap I might wager!!

Now we're into some different stuff! What you're referring to are called "volute" springs. These are basically a very thin "beam" wound into a spiral coil. When compressed, one "side" (it's wound in a spiral) is placed in compression while the opposing side is placed in tension, thus mimicking beam loading but not in a planar fashion.


Please don't quote my posts and then modify them so that the results appear to be my words.

I have nothing at all against the French, for the record.

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Originally Posted By: Dewey Vicknair
Originally Posted By: Run With The Fox
Originally Posted By: Dewey Vicknair
Originally Posted By: 2-piper
Dewey;
I have springs on items from the 1850's thru 1870's (Not gun related) which are I believe called convolute springs. These springs are wound in a cone shape from flat stock much like a clock spring. They however work by compression & not by winding up as in a clock spring. So, what action would you call them, I see absolutely no evidence of torsional movement as they are compressed & this should show on the wide, thin cross section if it were present.


Now we're into some different stuff! What you're referring to are called "volute" springs. These are basically a very thin "beam" wound into a spiral coil. When compressed, one "side" (it's wound in a spiral) is placed in compression while the opposing side is placed in tension, thus mimicking beam loading but not in a planar fashion.


Please don't quote my posts and then modify them so that the results appear to be my words.

I have nothing at all against the French, for the record.
Sorry, le faux pas es moi, mon ami. I have midget respect for the French en tot, their metallurgists and some of their non-miltary gun makers like Granger-- I recall what America's best field General- George Smith Patton Jr. once said about the French- "I'd rather have one French division ahead of me that 3 French divisions behind me"--and Patton spoke fluent French-go figure

Last edited by Run With The Fox; 11/04/15 09:38 PM.

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I've grown fond of hammer guns of late, but I would also be curious to hear Dewey's opinion of Dan Lefever's self compensating bolt mechanism and adjusting screw, which no other maker to my knowledge has fashioned. I'm not sure why, because whatever faults Lefevers may have, shooting loose isn't one of them...

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Some years back I bought a Lefever H grade with twist barrels as a "Parts" gun. According to the seller it was all there but didn't work, price was extremely low. When I picked it up he stated he had "Fixed" it & it would now work. guess that depends on one definition of "Fixed". Problem had been the trigger plate screw had been replaced with a Too Long screw. This screw projected up inside the frame & prevented the cocking hook from seating so the gun would not bolt up. He had fixed it by backing out the ball hinge screw until the end of the barrels would tip over enough for the bolt to engage. One barrel had a crack in it & the stock was busted. Showed a lot of use & a good bit of abuse. With the trigger plate screw shortened so the cocking hook would seat & the hinge screw re-adjusted it locked up real tight though there was bolt wear which allowed the lever to go left I actually then tried t with the ball hinge completely removed with just the doll's head & bolt securing the barrels & it still bolted up tight.
It is hard to convince me that a well fitted doll's head is a useless adornment & especially this square shouldered one of Lefever's design. Still haven't needed a part off of this one though, nothing has broken on my others.
Viva Lefever


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Originally Posted By: 2-piper
Some years back I bought a Lefever H grade with twist barrels as a "Parts" gun. According to the seller it was all there but didn't work, price was extremely low. When I picked it up he stated he had "Fixed" it & it would now work. guess that depends on one definition of "Fixed". Problem had been the trigger plate screw had been replaced with a Too Long screw. This screw projected up inside the frame & prevented the cocking hook from seating so the gun would not bolt up. He had fixed it by backing out the ball hinge screw until the end of the barrels would tip over enough for the bolt to engage. One barrel had a crack in it & the stock was busted. Showed a lot of use & a good bit of abuse. With the trigger plate screw shortened so the cocking hook would seat & the hinge screw re-adjusted it locked up real tight though there was bolt wear which allowed the lever to go left I actually then tried t with the ball hinge completely removed with just the doll's head & bolt securing the barrels & it still bolted up tight.
It is hard to convince me that a well fitted doll's head is a useless adornment & especially this square shouldered one of Lefever's design. Still haven't needed a part off of this one though, nothing has broken on my others.
Viva Lefever
Oui- bon chance La Le-Fever!!


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Isn't the Lefever a modification of the earlier Webley Screw Grip?


Men build too many walls and not enough bridges. -Isaac Newton
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