File:1925 wobble board precursor by Albert C. Wendelken.tiff

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Description

These are eight of the patent drawings for a physical-fitness exercise device.

The inventor was Albert C. Wendelken of Marietta, Ohio.

The 1926 U.S. patent for this device was applied for in 1925. Its patent number is 1,585,748. The patent included thirteen drawings.

This device (rather than one invented by Bernard L. Coplin, whose 1957 U.S patent was applied for in 1954) would be the first wobble board known to be patented if it could be stood on without the user holding on to some stable external support, but as is obvious from the steepness of the board in the patent drawing of a user swinging on the device, it couldn't be. (Although the dangling springs in the drawing aren't a stable support, the ceiling to which they connect the user's hands is.)

The issue of which device was the first wobble board known to have been patented and the issue of whether a device can be considered a wobble board if its user needs to hold onto an external support are elaborated on at the Image Description Page of the patent drawings of Samuel L. Jordan's 1951 precursor to the wobble board.

Date
Source Patent 1,585,748 of the U.S. Patent and Trademark Office
If your computer doesn't display the drawings of the patent when you click that link (which goes to the page of that patent at the website of the U.S. Patent and Trademark Office), you need to install a plug-in that will enable your web browser to display a TIFF file. Using such a plug-in might increase your web browser's zoom level (its magnification level) to 200% at all webpages (until you reset it to 100%). You can avoid needing to install such a plug-in by going to a search engine such as Google and typing the patent's number (478,166) and the word "patent" in the keyword searchbox. This will deliver links to the patent's page at non-governmental patent-search websites. At most of those websites, the images' file format isn't TIFF.
Author Albert C. Wendelken
Permission
(Reusing this file)
Public domain The text and illustrations of US patents published before March 1, 1989 are in the public domain unless the patent text contains a specific notice that portions are copyrighted.See [1], 37 CFR 1.7(d), 37 CFR 1.84(s)

The original patent contains no such notice, so its contents are in the public domain. Note: This only applies to images published before March 1, 1989. Patents published after that date are most likely copyrighted, unless in the public domain for another reason, such as {{PD-ineligible}}.

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current16:18, 9 September 2011Thumbnail for version as of 16:18, 9 September 20112,320 × 3,408 (43 KB)DavidMaisel (talk | contribs){{Information |Description= These are eight of the patent drawings for a physical-fitness exercise device. The inventor was Albert C. Wendelken of Marietta, Ohio. The 1926 U.S. patent for this device was applied for in 1925. Its patent number is [http
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