https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=29830&pn=250,493 Lubricating Wrench Patentee: Oliver Brothers Jr. - Hartland VT Granted:1881-12-06
Manufactured by Frank L. French - Meriden NH
Assigned to John H. French - Hartford VT

The oiler with spring-loaded internal plug is on the back side of a screw-adjusted axle nut wrench. One known example has a threaded stud on the back side; the oil can was absent. Another has a plausible oil can braze welded to the frame. A blank letterhead gives the maker name as Wagon Wrench Co. of Hartford, VT.
This is one of 84,722 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=29928&pn=255,637 Carriage Wrench Patentees: Prescott B. Kinsman - Great Falls NH , Josiah Merrill - Great Falls NH Granted:1882-03-28
Manufactured by Eureka Wrench Co. - Great Falls NH

The frame has the fixed jaw, a slide way for the movable jaw, and a round socket for the oiler. A bolt in the end of the frame adjusts the movable jaw. Most known extant examples are missing the oil can.
This is one of 84,722 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85425&pn=1,015,181 Wrench Patentee: Frederick Victor Hendrickson - Kelletville PA Granted:1912-01-16
Manufactured by Kayro Wrench & Mfg.Co. - Wilmington DE

Claim 1: "A wrench comprising a handle, a stem thereon, a stationary jaw on the outer end of said stem, a movable jaw adjustably mounted on said stem, a spring projected pawl adapted to engage said stem and hold said jaw in its adjusted positions, said pawl having its shank curved inwardly intermediately of its ends toward said stem, said curved portion operating against said stem to form a fulcrum for the pawl, means to loosely connect said pawl to said movable jaw." Two forms of wrench having different physical appearance have been put forward as pertaining to this patent. The "loop handle" form has no visible markings. The "solid handle" form is marked "KAYRO / PATENTED AUG 1911." KAYRO WRENCH & MFG. Co. was formed in Delaware in 1913.
This is one of 84,722 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=20749&pn=430,656 Combination Nut and Pipe Wrench Patentee: Erastus Edwin King - Lees Summit MO Granted:1890-06-24
Manufactured by King & Hough - Lees Summit MO

The thumb lever releases a spring-tensioned pawl lever that engages rack teeth on the shank of the movable jaw. The movable jaw is moved to close by a compression spring. The operating mechanism is enclosed. Corresponding British patent 9,792 (GB-189009792) of 1890 is dated June 24, 1890. "An extremely rare example of KING'S PATENT NUT WRENCH as produced by King & Hough, Lees Summit, Missouri under the terms of patent number 430,656, issued on June 24, 1890. A thumb lever releases the lower jaw mechanism to precisely adjust in place. This is the first example of this rare wrench that we have ever offered for sale." -- Description courtesy and copyrighted by Martin J. Donnelly Antique Tools
This is one of 84,722 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=30677&pn=759,869 Wrench Patentee: David R. Ellis - Chicago IL Granted:1904-05-17
Manufactured by David R. Ellis - Chicago IL

The striking feature of the Ellis patent is the pivoting handle. It swings on a common pin with the adjusting worm. The Nov. 3, 1903 date often associated with the wrench is not reflected in either the application or patent dates.
This is one of 84,722 patents currently in the database at datamp.org

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