https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=31810&pn=773,773 Chain Pipe-Wrench Patentees: George Amborn - New York NY , Herbert C. Chase - New York NY Granted:1904-11-01
Manufactured by J. H. Williams & Co. - Brooklyn NY
Assigned to J. H. Williams & Co. - Brooklyn NY

Improvement to George Amborn, Jr. patent no. 698,780. The parts are reconfigured to improve the wrench's ability to work in tight quarters. The chain's attachment to the head is to follow Bufford's November 3, 1903 patent (no. 743,058). Patent no. 769,043 is another stage in the evolution of the design. Compare British patent GB-190423580 registered Nov. 1, 1904. Williams produced chain wrenches of this sort for work with fittings, pipe nipples, etc. under the trade name "AGRIPPA."
This is one of 83,710 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=22753&pn=257,468 Wrench Patentee: Matthew E. Campfield - Cleveland OH Granted:1882-05-09
Manufactured by Brown Specialty Manufacturing Co. - Etna PA

The main focus of the patent is the form of the adjusting screw and its attachment to the supporting ferule and shank. The specifications note two alternate modes of connecting the screw shaft and head of the adjusting screw. The patent drawing shows them riveted together; the specifications note they can also be "forced" together. Ken Cope's "American Wrench Makers 1830-1930" identifies the Brown Specialty Mfg. Co. of Etna, PA as one manufacturer. The Cleveland Screw Wrench Co. example shown in the 2nd image has the the screw and nut "forced" together, and the wrench shank extends through the wood handle to terminate in a screwed on nut. Campfield's August 12, 1884 patent (no. 303,385) describes another method for constructing the adjusting screw which might be the method employed for the Cleveland Screw Wrench Company adjusting screws. Campfield is listed as President of the Cleveland Screw Wrench Company in the Cleveland City Directory published in August, 1884.
This is one of 83,710 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=84411&pn=2,140,957 Milling Attachment Patentee: Michael Hanna - Glen Rogers, Wyoming County WV Granted:1938-12-20
Manufactured by Alva Allen Industries - Clinton, Henry County MO

Patented in Canada, patent #387,198. Abstract: This invention aims to provide a simple milling attachment, capable of being assembled with a lathe, for the purpose of cutting keyways in shafts, and for many other uses which will suggest themselves readily to a mechanic. The invention aims to provide novel means for assembling the device with a lathe, to provide novel means for mounting and driving the cutter and, generally, to improve and to enhance the utility of devices of that type to which the invention appertains. Claim: n a device of the class described, a plate-like base, means for adjusting the base about a fixed vertical axis and for securing the base on the tool i carriage of a lathe, an elongated tubular bearing connected integrally throughout its length directly to the base, a gear housing at one end of the base and formed integrally with said end of the base and with one end of the bearing, the housing projecting substantially at right angles to the axis of the bearing, a tool shaft journaled in the bearing, a driven shaft journaled in the housing and disposed parallel to the tool shaft, speed change gearing in the housing and connecting the shafts, a table above the housing, a motor on the table, a driving connection between the motor and the driven shaft and including a belt, a lid for the housing, and means carried by opposite sides of the housing for supporting the table tiltably, thereby to effect a tightening of the belt, said means being spaced to receive the lid therebetween.
This is one of 83,710 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=84410&pn=1,217,600 Wrench Support Patentee: George M. Hood - Steele AL Granted:1917-02-27

A "U" shaped frame with central leaf spring to provide a "non-rattling" holder for a wrench. The form shown in the drawing is supporting a small wrench of a type commonly used on garden cultivators, walking plows, etc.
This is one of 83,710 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=22697&pn=4,375,174 Adjustable End Wrench Releasable Locking Feature Patentee: Stephen E. Shanley Jr. - Grosse Ile MI Granted:1983-03-01
Manufactured by Tru-Grip Corporation - Riverview MI
Assigned to Shan-Lok Corporation - Grosse Ile MI

The patent is for a lever handle and linkage which tightens and can lock the grip of of the movable jaw on a "Crescent" type adjustable end wrench. Distributed as the "Tru-Grip Wrench." A 1985 ad lists three sizes: 8, 10, and 12 inch. The patents cited are: 599,379, 1,403,334, 1,490,903, 1,506,362, 1,771,692, 2,539,852, 3,190,154, and 3,333,492.
This is one of 83,710 patents currently in the database at datamp.org

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