https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=7827&pn=1,304,714 Tool-driver Patentee: Laroy S. Starrett - Athol MA Granted:1919-05-27
Manufactured by L. S. Starrett Co. - Athol MA
Assigned to L. S. Starrett Co. - Athol MA

From Clifford Fales, Sample marked, "THE L.S. STARRETT CO. / ATHOL, MASS. U.S.A. / NO. 801. / PAT. APPLIED FOR". This screwdriver is a most unusual tool coming from the L.S. Starrett Co., maker of machinist tools. The mechanism operates as you would expect in RH, LH & fixed modes which are set by rotating the body tube. It was made with a spindle locking ring at the end of the tube (similar to the YANKEE spiral-ratchet drivers) which is intended to lock the spindle in the closed position.
This is one of 84,775 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=17890&pn=184,524 Gage Patentee: Frederick D. Hazelton - Boston, Suffolk County MA Granted:1876-11-21

Abstract: My invention relates to improvements in caliper-squares for the purpose of measuring external diameters of shafts or cylindrical pieces, as well as for the purpose of squaring and measuring rectangular, square, or similar pieces of work that commonly occur in machine-shops or other works; and my invention consists of an ordinary graduated scale, provided at each end with a T-headed or similar recess, into which is fitted a T-headed or correspondingly-shaped screw- bolt, that passes through the head of a leg projecting from the extreme end of the scale in a right angle. The head of the said leg is provided with side lips or projections, that form a groove between them, in which the extreme end of the scale fits, at the same time as they serve to prevent the T-head of the screw- bolt from turning around or getting detached from the scale when the thumbnut that is used on the T-headed bolt is screwed up firmly to secure the square leg to either end of the graduated scale. In combination with the firmly- secured square leg in one end of the scale is used a movable leg, projecting at a right angle from the scale, and made to slide easily in and out on the latter, and provided with a set-screw, by which the said movable leg can be secured in any desired position on the graduated scale.
This is one of 84,775 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85483&pn=9,308 Improvements on circular-saws Patentee: Joseph Augustus Robbins - Boston MA Granted:1878-11-05
Manufactured by Boston Planing Saw Co. - Boston MA

This is the Canadian equivalent of US patents 211,259 and 211,346.
This is one of 84,775 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85340&pn=2,799,092 Instrument for measuring holes Patentee: Hugo Abramson - Eskilstuna, Södermanland County Sweden Granted:1957-07-16
Manufactured by C. E. Johansson, AB - Eskilstuna, Södermanland County Sweden
Assigned to C. E. Johansson, AB - Eskilstuna, Södermanland County Sweden


This is one of 84,775 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85339&pn=2,536,117 Pressure pad for apparatus for measuring forces Patentee: Hugo Abramson - Eskilstuna, Södermanland County Sweden Granted:1951-01-02
Manufactured by C. E. Johansson, AB - Eskilstuna, Södermanland County Sweden
Assigned to C. E. Johansson, AB - Eskilstuna, Södermanland County Sweden


This is one of 84,775 patents currently in the database at datamp.org

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