Warrington Model Engineering Developments

[Clive FosterParticipant @clivefoster55965]

Not familiar with details of Myford construction but could the kit have included a replacement stud of smaller diameter allowing the 17 tooth gear to be fitted. Presumably with a sleeve to allow a standard gear to be used when needed.

Clive

[duncan webster 1Participant @duncanwebster1]

Posted by Clive Foster on 24/05/2019 15:06:25:

Not familiar with details of Myford construction but could the kit have included a replacement stud of smaller diameter allowing the 17 tooth gear to be fitted. Presumably with a sleeve to allow a standard gear to be used when needed.

Clive

On the sleeve with the key machined into it, you could machine half te key away (lengthwise) and loctite a 17t unkeyed gear on

[Roderick JenkinsParticipant @roderickjenkins93242]

Posted by Clive Foster on 24/05/2019 15:06:25:

Not familiar with details of Myford construction but could the kit have included a replacement stud of smaller diameter allowing the 17 tooth gear to be fitted. Presumably with a sleeve to allow a standard gear to be used when needed.

Clive

That's my best guess. There is a patent number on the photo: Michael, where are you?  I think the whole thing is too well thought out not to have a solution.

Rod

Edited By Roderick Jenkins on 24/05/2019 15:24:42

[Brian WoodParticipant @brianwood45127]

Rod,

I tried finding the Patent but no banana, all UK patents start with GB2 in a 9 figure number and the search will not accept GB2 grafted onto the one shown.

The one shown is App No which I take as Applied for but it might even be a fake to look realistic; getting a patent in any country is an expensive business and would take up a fair chunk of any earnings the attachment might have raised.

The 17 T gear might have been a special fitting, brazed onto the other gear behind it, and used as a pair with the woodruff key removed from the shaft

And who is Michael?!!

Brian

[Roderick JenkinsParticipant @roderickjenkins93242]

Michael Gilligan (MichaelG) is our resident search engine and patents hound. The Carlsberg of searching

[Brian WoodParticipant @brianwood45127]

Ah, but of course—I should have known. Maybe he can succeed where I failed

Brian

[Michael GilliganParticipant @michaelgilligan61133]

Posted by Philip Cooper 1 on 22/05/2019 11:22:52:

Please see below a few pictures …

.

Rod,

I've only just seen the cry for help

Happy to have a look, but I should mention that [ignoring the typo] Patt App. No. 80 31849 may, or may not, have produced a patent … it's a Patent Application reference.

MichaelG.

.

Edit: Bingo !! … Here is the Patent

 https://worldwide.espacenet.com/publicationDetails/originalDocument?CC=GB&NR=2059524A&KC=A&FT=D&ND=3&date=19810423&DB=EPODOC&locale=en_EP

 

 

Edited By Michael Gilligan on 24/05/2019 17:29:30

[Roderick JenkinsParticipant @roderickjenkins93242]

Thank you. You never disappoint

Rod

[Philip Cooper 1Participant @philipcooper1]

It was fascinating to read the patent application, thanks Michael for tracking it down. Unfortunately no clues about using the smaller gear, metric seems to get only one brief mention.

Below is a picture of the stud/sleeve/key arrangement. It might be possible to make a stepped sleeve that would allow the use of a gear with a reduced bore.

Still going to be tight, but worth investigating. Rod has very kindly made a couple of 17t gears, one of which is un-bored so could be adapted for use on a stepped sleeve, so I may now have a potential solution that would retain the originality of the unit.

Brian – Thank you for the offer to recalculate the ratios. I'll try and establish the constraints on gear size for each position to see if this could be an alternative way forward.

Thanks again to all for your inputs.

Philip

[Brian WoodParticipant @brianwood45127]

Hello Philip,

I have two alternatve gearing tables, both avoid the use of the awkward 17T gear, but as usual I cannot find the button that allows me to insert the images and post them here

They are on my Album or I can send them to you by email. If that is your preferred route contact me at

I have become quite interested in this device, Mr Pugh is, or was, a clever man and I appreciate his thinking that led to creating it

wood_y(at)btinternet(dot)com

Regards

Brian

[Brian WoodParticipant @brianwood45127]

Philip,

I've sent you a PM. Look in your inbox

Regards

Brian

[BazyleParticipant @bazyle]

One whacky solution to the keyway problem is to make the key bigger and serve as the actual tooth.

[Philip Cooper 1Participant @philipcooper1]

Some photos below of the solution that I arrived at, using the 17T gear that Rod very generously made. The mounting stud is 0.375" and the standard Myford change-wheels are 0.625", so I bored the 17T to 0.500". This was then Loctited and pinned to a stepped sleeve, the other end of which was milled for a keyway to take the standard gears as required. Seems to work fine, usable on Stud 1 and Stud 2. Thanks to Brian's mathematical prowess I also have a set of alternative gear combinations to make finding a suitable set-up even easier.

Thanks to all for your help, the generosity of Forum members is amazing. I hope to be able to make a similar contribution at some time.

Philip

And in place on Stud 2:

[Roderick JenkinsParticipant @roderickjenkins93242]

Rod

[Michael GilliganParticipant @michaelgilligan61133]

Nice job, Philip & Rod

MichaelG.

[keelParticipant @keel]

<p style=”text-align: left;”>Can anyone tell me the voltage of the motor in the WMED motorized cross slide for theML10 110 v mode</p>

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