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US Patent: 2,175,237
Vibratory electric motor
Walter H. Young - Detroit, MI

USPTO Classifications:
15/98, 310/29

Tool Categories:
electrical devices : electric motors : reciprocating or vibrating electric motors
woodworking machines : reciprocating saws : scrollsaws

James Van Fleet - Detroit, MI

Syncro Devices, Inc. - Detroit, MI


Patent Dates:
Applied: Jul. 02, 1935
Granted: Oct. 10, 1939

Patent Pictures:
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"Vintage Machinery" entry for Syncro Devices, Inc.
See also patent 1,948,229 and patent 1,948,452.

This patent number has been seen on a small scrollsaw—the Syncro, Jr., "The jig saw for boys"—made by Syncro Devices, Inc. It seems likely that Syncro Devices, Inc. of Detroit later became Syncro Corp. of Oxford, MI.

Although this patent number has been seen on a scrollsaw, here is the introductory paragraph of the patent specification: "This invention relates to electric motors and particularly electric motors acting by the periodic magnetic attraction and spring retraction of a suitable armature to impose on the latter a rapid vibration. While such a motor may serve a variety of purposes, it serves in the present disclosure to actuate a floor polisher."

The inventor, Walter H. Young, was deceased by the time the patent was issued. The assignee, James Van Fleet, was also the administrator of Young's estate.

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