oldsewnsew

I have on that exhibits no signs of power, it's not the plug.[ATTACH=CONFIG]439754[/ATTACH]
I haven't disassembled it at all yet, it looks almost like it has 4 round brush holder tubes, rather than 2. What am I liable to encounter in there? any one seen a video or turorial on these?
Thanks
--Jim

J Miller

Jim,

Those motors only have two brushes. They are just simple basic motors. The only bad thing about them is the motor body end caps can be broken around the screw holes by over tightening.
Check the wiring thoroughly. Then check the foot controller and it's wiring.
If all that is good you can remove the brushes from the outside for cleaning and inspection. If they are good then there is two flat pieces of plated steel on the inside that contacts the brush holders and those can become dirty, corroded and even bent. To work on those you'll have to take the motor apart.

I've only had one of those types of motors apart for rewiring and they are simple. They just look different.

Joe

oldsewnsew

it looks like there are 4 tubes (brushholders?) how do you get the brushes out? am i looking at the right areas? i see small round brushes forsale WO springs at the HW store.

J Miller

Jim,

The two brass looking tubes with small screws down inside them are the brush holders. You slip a screwdriver down in the tube, unscrew the screws and shake out the brushes and springs.

If this motor has 4 brushes it is different than the one I rebuilt.

Joe

oldsewnsew

Thanks Joe;
I see. Any idea on the 2 shorter tubes same dia but looks like they have brass plugs in them? Grease tubes?

Jim

J Miller

Jim,

The wing shaped spring connectors and the field coil wires attach to the second set of tubes. In the pic below you can see the ends of the brush tubes w/out brushes at 4:00 and 10:00. The wing connectors with the field wires are at about 1:00 and 7:00. You can also see how the one end of each wing shaped connector contacts the brush tubes.
There is some movement in the design, that's why I said the parts should be clean from oil and corrosion.

[ATTACH=CONFIG]439913[/ATTACH]

Here is another pic with the wing connectors and brush tubes more visible:

[ATTACH=CONFIG]439918[/ATTACH]

This motor doesn't use grease, only oil as far as I know.

Joe

Mizkaki

Joe,

You said "There is some movement in the design". Do you mean the side to side sliding of the brush tubes?
Are you aware that that movement is to change the rotation direction of the motor? I know that these slide on the motors with the table top stand. I haven't tried to move them on the motors that are attached to the machine.
The tubes can be very hard to slide. Don't force them.

On these "jack rabbit" motors with the stand (as compared to the bracket attached to the machine) this rotation reversal was to accommodate different machines. They were advertised as being able to make any machine electric by placing the motor behind the machine with the pulley in contact with hand wheel. And check the last picture, it will whip cream and salad dressings. This motor and booklet are from 1916.

[ATTACH=CONFIG]439939[/ATTACH][ATTACH=CONFIG]439940[/ATTACH][ATTACH=CONFIG]439941[/ATTACH][ATTACH=CONFIG]439942[/ATTACH]

I know this is toooooo much information again,
Cathy

J Miller

Cathy,

I did not know that the movement in the brush tube plate ( not correct nomenclature I'm sure ) was to reverse the motors rotation. Makes sense though. I've only worked on one of them and took a bunch of pics while doing it.
Not nearly enough though.

I'd like to have one like the first few pics you showed. That would make treadles very versatile. Or just be different.


Joe

Mizkaki

Joe,

I think "brush tube plate" is a good way of describing it, as it is the brass plate that the tubes attach to that moves.

That free standing Jack rabbit is very different and cool. Now that you know what you are looking for, you will run across one or two.

Cathy

J Miller

Cathy,

I've been thinking back to all the antique shops I've visited, both here and other places, and I can't remember a single one of those motors that wasn't attached to a machine.
Maybe I just wasn't paying attention.

Joe