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US Patent: 1,196,232
Device For Opening And Closing Fruit Jars
Patentee:
Arthur Reginald Gurnett - Toronto, Ontario Canada

USPTO Classifications:
81/3.44

Tool Categories:
wrenches : jar wrenches
household tools : can openers

Assignees:
None

Manufacturer:
Unknown

Witnesses:
Geo. P. Mackie
N. R. Tyndall
E. P. Hall

Patent Dates:
Applied: Apr. 27, 1915
Granted: Aug. 29, 1916

Patent Pictures: [ 1 | 2 ]
Arthur R. Gurnett patent Aug. 29, 1916
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Description:
The pivot pins which allow size adjustment are "flat oval" so the handles have to be swung out to let them slide. The design means three areas of gripping teeth would engage with most sizes of screw on jar lids. The "fingers" keep the wrench in the middle of a Mason jar closure; they also would work to release the "vacuum" of some other commonly used jar closures.

A known example marked "U.S. PAT 1196232 AUG 29, 1916" includes a smaller set of wrench jaw teeth in the handles, and has a can opener and bottle cap lifter on the handle ends.

Corresponding Canadian patent CA-164,637 was granted Aug. 31, 1915.

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