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Porter Stem/Table  Rate Topic 
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 Posted: Sun May 30th, 2021 05:17 pm
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Louis Luu
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Here is the first mocked up table/stem for the Porter Geissler Rotator.  The white clay will be trimmed and prime.  These will be where the terminals can be hooked up to power the motor and Geissler rotator.







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 Posted: Sun May 30th, 2021 05:21 pm
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Louis Luu
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These will also be mocked up.  Can be used on the Porter/Ajax/Hustler/Rex/Voltamp...motors.






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 Posted: Sun May 30th, 2021 05:24 pm
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Louis Luu
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The blade hubs have already been casted. 3 and 6 blade versions. Will fit most small toy motors.

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 Posted: Mon May 31st, 2021 02:29 am
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Louis Luu
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Just in case there are those who have not seen a geissler rotator...I seriously doubt it.  I am very excited about the pedestal!  A poor man's Zeigler rotator.


Last edited on Mon May 31st, 2021 09:30 am by Louis Luu

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 Posted: Mon May 31st, 2021 03:38 am
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Louis Luu
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Took the original image...trapezoid squaring and mirroring.  This gives the rough shape/template to mock up the table.







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 Posted: Mon May 31st, 2021 06:31 am
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Russ Huber
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Last edited on Tue Jun 1st, 2021 06:40 am by Russ Huber

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 Posted: Tue Jun 1st, 2021 06:10 am
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Louis Luu
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Table ready for casting.  Really heavy base.  Perfect for geissler rotator.  Bottom base has terminal mounting for motor and geissler tube.






I dropped the pedestal/table off yesterday.  Base price for material cost is $100...it is heavy!  I went ahead and decided to cast only 10 of these.  There are some motors that I have that needs to be on a pedestal to highlight their unique design. 

Then there are motors I have that need to be mounted on wooden base only...I will make the feet for them.

And there are other motors that would look best on a table. 

All these will be fun to cast but the pedestal has always been a long dream of mine...turning a porter motor into a a geissler rotator.

Last edited on Sun Jun 6th, 2021 04:59 pm by Louis Luu

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 Posted: Tue Jun 1st, 2021 06:11 am
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Louis Luu
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Need two more tables...will work on them sometime next week.






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 Posted: Tue Jun 1st, 2021 06:43 pm
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Richard Daugird
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You have some cool projects going on Louis.

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 Posted: Tue Jun 1st, 2021 06:45 pm
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Louis Luu
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Just keeping busy. Been figuring out what to do with the toy motors.

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 Posted: Sun Jun 6th, 2021 04:22 pm
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Louis Luu
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I will be casting some lions feet/paw and other decorative feet for since not all motors will be mounted on the metal table. The feet will be ideal for mounting on wood. Will post some pictures of some other stuff I will be casting soon.

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 Posted: Sun Jun 6th, 2021 05:31 pm
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Louis Luu
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Here are some of the feet stand for wooden table I will be working on.  The large one in the back is about the size of a baseball...large.  I had to remove the tips of the claws to release the glass ball.  This will be mocked back up in resin and a hole will be drilled to mount screws to the wood base.  I need one this size for a Union & Signal semaphore motor I plan to turn into a fan. 




Motor is at least 40+ pounds.  Need a big feet to mount to wooden base along with fan blade for clearance.





Attached Image (viewed 425 times):

Union-Switch-and-Signal-Semaphore-Electric-motor-by.jpg

Last edited on Sun Jun 6th, 2021 05:38 pm by Louis Luu

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 Posted: Sat Jul 10th, 2021 01:50 am
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Louis Luu
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Geissler Rotator Schematic (Not drawn to scale).




Last edited on Mon Jul 12th, 2021 10:16 am by Louis Luu

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 Posted: Sat Jul 10th, 2021 02:02 am
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Louis Luu
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Geissler rotor.





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 Posted: Sat Jul 10th, 2021 02:12 am
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Terry Fisher
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That's a great project. Anxious to see the finished rotators. 

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 Posted: Sun Jul 11th, 2021 05:58 am
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Jim Kovar
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Louis, maybe Terry can tell you the

finer points of how to securely mount
a Geissler tube to a rotator.   :shock:   :?  :badidea

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 Posted: Sun Jul 11th, 2021 06:02 am
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Louis Luu
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:imao:imao:imao:imao:imao

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 Posted: Sun Jul 11th, 2021 06:06 am
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Louis Luu
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I will be adding a special one in case I run out of Geissler tubes...Tesla Coil Rotator.  A fancy spinning lighter.

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 Posted: Sun Jul 11th, 2021 08:40 pm
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Louis Luu
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The good news, I can now cast small motors as well.  The metal I'm using for casting has good magnetic properties.


I have a whole bunch of original Geissler Rotators I will be casting.

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 Posted: Sun Jul 11th, 2021 09:58 pm
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Louis Luu
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Just dreaming if it could only come true.  The motor would be functional...just wrap some wires around it.





Need to get a hand on one.

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 Posted: Sun Jul 11th, 2021 10:03 pm
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Louis Luu
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I got my hands on these.









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 Posted: Sun Jul 11th, 2021 10:11 pm
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Louis Luu
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I have done some experimental casting with gears, they do work. But machining parts...lathe is a problem still for me because I don't have one and don't feel comfortable loosing my fingers on one of them monster contraption.

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 Posted: Sun Jul 11th, 2021 10:12 pm
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Louis Luu
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I'll be working on the toy motor tables next week.

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 Posted: Sun Jul 11th, 2021 10:53 pm
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Louis Luu
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Now for some boring stuff. Cast iron is mostly iron with some impurities not by design but mainly due to cost of purifying. Pure metal cost a lot to manufacture. Metals are mostly held loosely together by a sea of electrons. Depending on the amount of electrons in the "ocean", it gives the metal its conductivity and ductile strength. The metal atom itself can be paramagnetic (electrons spins only in a single directions) or diamagnetic (electrons spin in opposite directions). Paramagnetic atoms are attracted to a magnetic field due to single spin direction and diamagnetic atoms are mildly attracted to magnetic field due to cancellation of electron spin. Cast iron is perfect for motor casting because the atoms are paramagnetic and loosely held in a sea of electrons. But the problem with casting iron is its "sluggishness/high viscosity" and makes for a poor candidate for mold casting but not sand casting. You will often find pockets of trapped air for this reason.


When you start adding additives to iron, it creates an interlocking crystal. Stainless steel while it does have iron should be magnetic but is not due to addition of nickel. Nickel locks up the iron so it can not easily rotate like it would in an ocean of electrons. The addition of nickel prevents the iron from being attacked by oxygen causing rust and provides additional strength to this matrix. Nickel additives has the advantage of lowering the heat needed to allow it to flow readily for mold casting and results in less air bubbles. That is the reason I use stainless steel for my casting. But the removal of magnetic properties make it a poor choice for casting motor housing.


By removing nickel and adding another similar metal, the matrix is weakened and iron atom is not locked up and can freely spin. This allows for a good compromise for pouring and still having magnetic properties after it is cast. The new iron alloy I'm using is easy to pour for mold casting and has this magnetic property. This is a dream come true...I have always wanted to cast small toy motors and is now possible.


Told you it was boring stuff to read.

Last edited on Mon Jul 12th, 2021 09:03 am by Louis Luu

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 Posted: Wed Jul 14th, 2021 02:57 am
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Louis Luu
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Dimension for the table.  Next is to import into cad and have one printed...my first time.  I'm doing this to save on time for casting.  Once I get the printed parts, I will make a mold.  I need to add curves to the side panel still but got the overall dimensions I want along with the outline that would look pleasing.  I did put Porter No. 2 in front of the my monitor screen and it does look pleasing.  I had to adjust the leg for the second design...looked too "leggy"...shortened it a bit.













Last edited on Wed Jul 14th, 2021 03:00 am by Louis Luu

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 Posted: Wed Jul 14th, 2021 03:34 am
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Terry Fisher
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Hey Jim,
Finding out how to mount the tube correctly only cost me $250 and shattered tubes are not repairable.

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 Posted: Wed Jul 14th, 2021 08:12 am
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Louis Luu
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I gave up on CAD...could not get the curvature correct...too much work.  Scaled up everything to the correct size.  Print out on paper.  Tomorrow, I will glue them onto fiber board and dremel the pattern.  The width and length is not square...rectangular to give it a more pleasing look.  This will be followed by polyclay to give correct curvature so it does not look flat.  Once everything looks correct...spray paint with enamel.  Follow by mold making.














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 Posted: Wed Jul 14th, 2021 10:01 am
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Louis Luu
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Paper mock up.  I will cut fiberboard and the panel will be curve to give it some depth.  Feet needs to be added on still...will do that later.












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 Posted: Wed Jul 14th, 2021 11:44 am
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Louis Luu
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This is just a mock up...I will adjust size for various motors. The goal is to make the flatter one for Ajax, Little Hustler, Volt...the little guys. Than the Porter No. 1 and No.2. It will be aesthetically pleasing. I just did the drawings today...will finalize it tomorrow.

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 Posted: Thu Jul 15th, 2021 04:59 am
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Louis Luu
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Now it looks correct.  I will begin work next week.  Getting the right proportion is the hard part base on the drawing.

Ajax





Porter No.1





Porter No,2





The bigger base is design for Porter No.2 and the smaller base is design for Porter No.1 and various small toy motors (Ajax, Little Hustler, Volt, Rex...)






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 Posted: Thu Jul 15th, 2021 01:59 pm
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Louis Luu
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It turns out CAD is not so hard after all...spent all day but got it done.





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 Posted: Fri Jul 16th, 2021 09:06 am
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Louis Luu
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I drew up the Geissler tube holder in Cad.



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