Day No.7 – Now that’s a demagnetizer !

A Boettger and Wittig Demagnetizer, a watch was placed inside of the core and the slide was then moved in and out to change the polarity of the magnet, as described in patent number 699863:  The slide and comb thereon constitute a pole changer, and in practice the same is actuated to cause frequent reverses of the direction of current that goes through the electromagnet. A magnetized watch, tool, or other device is placed in the hollow core of the electromagnet… the pole changer is operated to effect its function… the result being demagnetization of said device.

Boettger and Wittig Demagnetizer

 

A Boettger and Wittig Demagnetizer, a watch was placed inside of the core and the slide was then moved in and out to change the polarity of the magnet, as described in patent number 699863:  The slide and comb thereon constitute a pole changer, and in practice the same is actuated to cause frequent reverses of the direction of current that goes through the electromagnet. A magnetized watch, tool, or other device is placed in the hollow core of the electromagnet… the pole changer is operated to effect its function… the result being demagnetization of said device.

The watch is placed inside

 

Patent US699863

Patent US699863

 

To use, a watch is placed inside of the core; the slide is then moved in and out to change the polarity of the magnet, as described in patent number 699863:

The slide and comb thereon constitute a pole changer, and in practice the same is actuated to cause frequent reverses of the direction of current that goes through the electromagnet. A magnetized watch, tool, or other device is placed in the hollow core of the electromagnet… the pole changer is operated to effect its function… the result being demagnetization of said device.

pic2467a

Oddly enough, or maybe not oddly at all given the circumstances, Dennis had a collection of demagnetizers. This was my by far my favorite though.

Here are some other goodies from today’s work:

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Gorgeously golden aged lacquer on an antique microscope

 

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Pocket meter with original leather case

 

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A sample of the level collection

 

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Lovely little drill press

 

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Extra Schaublin 102 headstock

 

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Engine turned background

 

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Watchmakers lathe transmission drives

 

 

4 responses

  1. I love your blog logs. So fascinating and educational. I feel as though I am traveling back In time every day as I read and re read your logs. Thanks for sharing the stories. Ahh, another talent from the genius of Brittany Nico Cox.

    Like

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