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Author Topic: The First Gizmo  (Read 3676 times)

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Offline Eric Krewson

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The First Gizmo
« on: September 15, 2015, 05:23:37 pm »
I was looking through and obscure picture file on my computer and found a picture of the first tillering gizmo I made. It has changed a bunch since my first attempt. A friend from Mississippi named Daniel Willoughby came up with the idea  to replace the set screws that held the pencil with a 5/16th nut, a much better idea. Another guy suggested cutting the shape to a pyramid shape, another great idea.

Here is the first design;



The latest version;

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Stringman

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Re: The First Gizmo
« Reply #1 on: September 15, 2015, 05:48:09 pm »
It's cool to look back over time and see how things evolve with use. That is really a handy tool to have in your bowyering tool box.

I'm not sure where my inspiration came from, but I have modified mine to be a multi tool of sorts. The body is a flat but has dowels protruding equa-distant from center point on the top side. This allows me to reverse the direction the pencil protrudes from and have a tool that defines the running center point on a stave. Now someone tell me where I saw that, cause Im pretty sure I didn't dream it up on my own.
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Offline simson

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Re: The First Gizmo
« Reply #2 on: September 15, 2015, 05:59:10 pm »
I have made me s a similar tool years ago. But laid it aside, for me only useful for cicular regular tiller on straight bows like ELB's.

I have made another instrument, a kinda caliper also with the nut + pencil thing, this is quite useful for me on bows with changing crowns.
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Simon
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Offline steelslinger

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Re: The First Gizmo
« Reply #3 on: September 15, 2015, 09:20:24 pm »
Quote from: simson on September 15, 2015, 05:59:10 pm
I have made me s a similar tool years ago. But laid it aside, for me only useful for cicular regular tiller on straight bows like ELB's.

I have made another instrument, a kinda caliper also with the nut + pencil thing, this is quite useful for me on bows with changing crowns.

Lets see a picture, it sounds cool.
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Offline red hill

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Re: The First Gizmo
« Reply #4 on: September 15, 2015, 09:28:56 pm »
Strongman, did you get it from Pat Brennan? I have the same device.
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Stringman

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Re: The First Gizmo
« Reply #5 on: September 15, 2015, 09:55:26 pm »
Nope I made mine, but very possibilly copied from him.

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Offline Pat B

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Re: The First Gizmo
« Reply #6 on: September 15, 2015, 11:39:22 pm »
like this... Tis was te first one I made into a centering tool also. I think I gave this to Pappy.


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Make the most of all that comes and the least of all that goes!    Pat Brennan  Brevard, NC

Offline Pappy

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Re: The First Gizmo
« Reply #7 on: September 16, 2015, 04:14:54 am »
Yep you did Pat. :)Still got it and use it when the time is appropriate ,like the Gizmo, not good for everything but works very well in a lot of applications.  :) Eric gave me my first Gizmo and many since to pass along. We have given a bunch away at the Classic. Thanks, I am a very blessed guy to have such good friends. ;) :)
 Pappy
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Offline Knoll

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Re: The First Gizmo
« Reply #8 on: September 16, 2015, 05:58:52 am »
Mine's made from hunk of pallet wood and a 1/4" t-nut.



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Offline JoJoDapyro

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Re: The First Gizmo
« Reply #9 on: September 16, 2015, 10:07:30 am »
So many ideas of things to build!
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Offline Onebowonder

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Re: The First Gizmo
« Reply #10 on: September 16, 2015, 11:23:12 am »
PaulnKS gave me my first Gizmo at my first MOJAM years ago.  I don't use it often, but it is sometimes the BEST tool for the job.  I used to use the edge of my furniture scraper for the same function, but the pencil in a Gizmo gives you a very visual queue as to EXACTLY where the issue is.

OneBow
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Offline hunterbob

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Re: The First Gizmo
« Reply #11 on: September 17, 2015, 04:32:11 pm »
I know mine is a little more crude looking than yours Eric . But I don't know what I would do without it .
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Offline 4est Trekker

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Re: The First Gizmo
« Reply #12 on: September 17, 2015, 08:07:33 pm »
The tillering gizmo (and centering tool) took my bow building to a whole new level.  Thanks for sharing this fantastic little doodad with the masses, Eric! 
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Offline toomanyknots

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Re: The First Gizmo
« Reply #13 on: September 17, 2015, 08:38:51 pm »
Do those things really work that good? Would they work on an ELB style bow? Would you need a longer one for a longer bow?
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 the upper part is pressed down,
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 the part that has too much is reduced,
 the part that has too little is increased."

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Offline Jim Davis

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Re: The First Gizmo
« Reply #14 on: September 17, 2015, 10:51:35 pm »
Lots of you guys may have come up with the centering tool idea on your own, but the idea has been around for centuries. It's still a good one. Ideas similar to Eric's Gizmo have been around at least since the 1930s, but I think the earlier ideas were unnecessarily more complicate--some used a dial indicator in place of the pencil, for instance.

I think Eric's approach was unprecedented in its simplicity and utility--different from any earlier version I have seen and better.

Jim Davis
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Jim Davis

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