https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=85922&pn=1,367,407 Wrench Patentee: Oak B. McClurkin - Morning Sun IA Granted:1921-02-01

Notches in the adjusting "nut" of screw wrench or "Stillson" type pipe wrench and a coordinating spring form an "adjustment lock."
This is one of 85,212 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85921&pn=325,487 Steam Engine Patentee: John L. Bogart - Flushing, Queens County NY Granted:1885-09-01

Abstract: This invention is made for inclosing the cranks and crankshaft of a vertical duplex single-acting engine in such a manner that Io access can be had for removing the cranks, the connecting-rods, and the plungers whenever required. Claim: The combination, with the twin single-acting steam-cylinders, connecting-rods, cranks, and shaft, of a case bolted to the ends of the cylinders and provided with the journal-boxes or bearings and a box-shaped base upon which the edges of the case rest, and hinges to connect the case and base.
This is one of 85,212 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85920&pn=1,368,966 Pipe-wrench Patentee: Welker V. Ooley - Linby IA Granted:1921-02-15

Swinging hook jaw held in adjustment by a "T" shaped spring.
This is one of 85,212 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85919&pn=771,169 Wrench Patentee: George McKercher - Jackson MI Granted:1904-09-27
Assigned to McKercher Wrench & Tool Co. - Jackson MI.

Improvement to previous McKercher designs, with the adjustment positioning mechanism being a spring-tensioned slide. Known McKercher wrenches did not incorporate this feature. Relevant McKercher patents include: 643,504, 729,504 and this patent.
This is one of 85,212 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=52371&pn=1,419,391 Wrench Patentee: Nils G. Larson - Attleboro, Bristol County MA Granted:1922-06-13
Manufactured by Larson Tool & Stamping - Attleboro MA

The ratchet pawl is in the rotating head. Larson Tool & Stamping included this ratchet in socket sets produced in the early 1920s, and advertised two sizes. Known examples are marked in part "Pat. Pend."
This is one of 85,212 patents currently in the database at datamp.org

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