https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=85350&pn=2,647,425 Self-adjusting wrench for nuts and like polygonal objects Patentee: Svend Olaf Mortensen - Copenhagen Denmark Granted:1953-08-04
Manufactured by CROMNA COMPANY - Copenhagen Denmark
Assigned to CROMNA COMPANY - Copenhagen Denmark

Refinement of the self-adjusting design in 2,570,991 and corresponding "foreign" patents. CROMNA wrenches were produced in Europe and Britain; they were available in Canada, and possibly imported into the U.S. Catalog listings etc. show four sizes.
This is one of 84,647 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=83709&pn=190,002,533 Improvements in Machines for Cutting the Teeth of Gear Wheels Patentee: Charles R. Gabriel - Providence, Providence County RI Granted:1900-10-13
Manufactured by Brown & Sharpe Mfg. Co. - Providence, Providence County RI
Assigned to Brown & Sharpe Mfg. Co. - Providence, Providence County RI

This Gear Machine was patented in the U. S., patent #645,082. Abstract: he machine is for cutting the teeth of spur gears, and especially spiral gears. The primary object of the invention is to provide an efficient machine for cutting spiral gears in which the various operations arc automatically performed, and a further object is- to provide a machine of this character which is adapted to cut spiral gears of varying pitch, diameter, and lead. In cutting spiral gears, the gear blank is secured upon a rotary support and is acted upon by a rott^ cutter, the axis of which is at an angle to the axis of the gear blank depending upon the diameter of the gear blank and the lead of the teeth to be cut. The blank is rotated, and either the cutter support or the blank support advanced in a direction parallel to the axis of the blank so that the centre of the cutter always lies in the same plane passing through the axis of the blank. The rotary movement of the work is in a definite ratio to the advance movement between the cutter and work, which ratio depends upon the lead of the gear being cut, and this ratio is preferably accurately maintained by gearing the work support to the reciprocating support. On the return movement of the reciprocating support the cutter should be out of cutting relation, and this is preferably accomplished by moving the cutter out of cutting relation, although so far as certain features on the invention are concerned. it may be accomplished by moving the blank support. After each cut the blank is given a partial rotation or indexed to bring the blank into position for the next cut, and the mechanism for thus indexing the blank is preferably so constructed that the blank is indexed without disconnecting the mechanism which rotates the blank during the action of the cutter.
This is one of 84,647 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85349&pn=951,526 Screw Driver Attachment Patentee: Elmer J. Douglas - South Albany VT Granted:1910-03-08


This is one of 84,647 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85348&pn=942,742 Screw Driver Patentee: Bert Presson - Pittsburg KS Granted:1909-12-07


This is one of 84,647 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85347&pn=980,595 Screw Driver Patentee: Carl Bush - Seattle WA Granted:1911-01-03

This is a tool made to attach insulators
This is one of 84,647 patents currently in the database at datamp.org

]]>