UNT Libraries Government Documents Department - 8 Matching Results

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Apparatus for Testing Errors of Refraction

Patent for an eye testing device that has a movable lens, a measuring device for correction, and two different cards with test type on them which are fed into the machine during testing for astigmatism and myopia, presbyopia, and hyperopia to determine the level of correction needed in glasses.

Date: July 2, 1907

Creator: Bahn, Gustavus Adolphus

Apparatus for Treating Timber.

Patent for an invention to aid in the treatment of treating timber. The invention is said to "provide a simple, inexpensive, durable, and efficient apparatus by means of which railroad cross-ties, fence-posts, and the like may be expeditiously and economically treated by immersion in a bath of some preserving liquid" (lines 16-22) including illustrations.

Date: July 11, 1905

Creator: Gerhard, Philip H.

Bale-Tie

Patent for a bale-tie fastener including illustrations.

Date: July 31, 1900

Creator: Cypher, David A. & Dayton, William L.

Cotton-Chopper.

Patent for a combined cotton-chopper and cultivator.

Date: July 29, 1902

Creator: Forister, John H. & McAda, James N.

Cotton-Handling Apparatus.

Patent for a cotton handling apparatus, which automatically feeds the cotton into the gin and stops if there is an overflow.

Date: July 7, 1908

Creator: Sullivan, Arthur A.

Coupling-Pin.

Patent for a coupling pin for railroad cars, which prevents the coupling from coming loose accidentally by having a key which locks the coupling in place and can only be undone by the cars operating systems. when it is time to disconnect the car.

Date: July 23, 1907

Creator: Yeiser, John Clarke

Ledger.

Patent for improvements in ledgers by giving each column in a ledger sheet a “label” such as customer’s name, daily entry, daily balance, monthly balance and etc… to record daily and monthly transactions of an individual customer's account. Illustration is included.

Date: July 8, 1902

Creator: Winn, Joseph B.

Note Register

Patent for a note register. Illustrations included.

Date: July 26, 1904