https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=30743&pn=1,830,033 Automatic Nut Wrench Patentee: John V. Larson - Chicago IL Granted:1931-11-03
Manufactured by Chicago Manufacturing & Distributing Co. - Chicago IL

Automatic wrench patents begin with August Kinderman's Jan. 25, 1870 design patent D3,821. By the 1920s, the patents focus on very subtle features. This patent's focus is on the shape and placement of the gear teeth so that maximum holding power coincides with standard nut sizes falling within the capacity of the wrench. LARCOLOY automatic nut wrenches used this patent and nos. 1,602,620 and 2,351,821. This patent was also associated with late production of SPEEDNUT by Chicago Mfg. & Distributing Co. (see Alloy-Artifacts). It appears in advertising for Hedstrom Industries LARC-O-MATIC introduced after WWII.
This is one of 83,753 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=14768&pn=RE3,308 Improvement in Tack Hammers Patentee: Thomas A. Conklin - New Britain CT Granted:1869-02-23
Manufactured by The Stanley Works - New Britain CT

Single piece casting with a hollowed handle and coated to prevent rust. No 4 in the Stanley 1872 catalog. The Walter's book mentions that Conklin was an original founder of A Stanley & Co.
This is one of 83,753 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=15768&pn=D34,139 Design for a Firmer Chisel Patentee: James Swan - Seymour CT Granted:1901-02-26
Manufactured by James Swan Co. - Seymour CT

Design is for the cross section shape of the chisel blade, "straight sides inclining slightly toward each other from edge to base and inclining slightly inward from bottom to top, bottom being flat, the very top consisting of two planes lying at a very obtuse angle to each other and intersecting at a center line which inclines slightly toward the bottom from the base forward..." Term of patent is 14 years. James Swan also patented a chisel design several weeks later with a semi-circular cross section, D34215. Example found with this patent date, see the pictures
This is one of 83,753 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=84452&pn=817,695 RADIATOR-VALVE UNION NIPPLE-WRENCH. Patentees: Fred Engle - Oshkosh WI , Louis W. Dukerschein - Oshkosh WI Granted:1906-04-10

"A wrench comprising a shank formed with a coaxially-stepped head and diametrically- disposed continuous furrows formed longitudinally of the stepped head." Grooves in the sides correspond with interior lugs on various radiator fittings; a section of the shank has flat sides to facilitate turning with a wrench. Later tools to address this type of work have similar features, without reference to this patent.
This is one of 83,753 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=84451&pn=330,494 Steam Engine Patentee: James E. Kimble - Vicksburg, Kalamazoo County MI Granted:1885-11-17
Manufactured by Kimble Steam Engine Co. - Kalamazoo, Kalamazoo County MI
Assigned to Ransom E. Kimble - Vicksburg, Kalamazoo County MI

Abstract: This invention has for its object certain improved features of construction, designed to simplify and cheapen and to facilitate the operation of steam-engines. Claim: The steam -chest, having the semi-cylindrical bushed shaft-bearings at the juncture of the radial side enclosures of the chest, the rock-shaft, and its radial plate, said shaft being passed through the chest and in said bearings, and having no other hearings, each end of the rockshaft without the chest being provided with a connecting-rod crank.
This is one of 83,753 patents currently in the database at datamp.org

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