https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=76786&pn=308,925 Machine for turning wrist-pins Patentee: Daniel W. Pedrick - Philadelphia PA Granted:1884-12-09
Manufactured by Pedrick & Ayer - Philadelphia PA
Assigned to Pedrick & Ayer - Philadelphia PA

Improvements to patents 78,733.
This is one of 81,825 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=54964&pn=262,878 Metal Turning Tool Patentee: James E. Woodbridge - Hartford, Hartford County CT Granted:1882-08-15
Manufactured by Hartford Tool Co. - Hartford, Hartford County CT
Assigned to Frederick N. Gardner - Hartford, Hartford County CT

Abstract: My improvement retates to tools which are intended to be held in the customary manner in the tool-post of a lathe or the toolholder of a planing-machine, and which have commonly been made of a bar of steel of rectangular section, having the cutting part forged of proper form upon its end. The object of my improvement is to provide a tool which can be used without reforging as worn, and be sharpened simply by grinding, the cutting part of which can be made of the best material without requiring the great waste of steel for the body or shank us ordinarily constructed. It also has for its object the construction of a reversible tool, both ends of which can be shaped and sharpened; and it also has for its object the reduction in quantity of the best steel required for the cutting-edges by making the cutting part separable and exchangeable, and by constructing the holding part so as to support and stiffen the cutting-edge in a lateral direction. Claim: The cap E, made convex transversely on its bearing-surface, and resting on the surface of the cutter along a horizontal middle line only of said cutter, in order to avoid injury to its corners.
This is one of 81,825 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=18400&pn=349,840 Drafting Compass Patentee: Frederick N. Gardner - Hartford CT Granted:1886-09-28
Manufactured by Hartford Tool Co. - Hartford, Hartford County CT
Assigned to Pratt & Whitney Co. - Hartford CT

Frederick N. Gardner was president of Hartford Tool Co., which was bought by Pratt & Whitney around 1886.
This is one of 81,825 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=82522&pn=60,739 Engine Cut-Off Patentee: John Abell - Toronto, York County ON, Canada Granted:1898-07-26

Abstract: The object of my invention is to devise a reverse and variable cut-off, which will permit of the the widest possible range and accuracy of cut-off, which will reverse quickly and which is simple in construction and reliable in operation and consists, essentially, in operating the valve connecting rod from the crank disk pin on a slide adjustable on a suitably driven crank disk and provided with means whereby its position on the disk may be changed at will, while the parts are in motion. Claim: In mechanism for the purpose described, a slide having a wrist pin on which is thereon on which is journaled the valve connecting rod in combination with a disk having guides thereon in which the said slide may move: a suitably journaled sleeve on which the said disk id fast; means for revolving the said sleeve from some moving part; a shaft within the sleeve; a connection between the shaft and the slide whereby the latter may be moved by the turning of the shaft.
This is one of 81,825 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=82523&pn=189,811,889 Improved Reverse and Variable Cut Off for Portable and Other Engines Patentee: John Abell - Toronto, York County ON, Canada Granted:1899-04-22

Patented in Canada, #CA-60,739. Abstract: Relates to variable cut-off and reversing gear for portable and other engines. The valve is actuated by an adjustable crankpin D, Fig. 2, carried by a disc F which is geared in the manner shown to the crank shaft K. The crank-pin is mounted on a slide E which can be moved across the disc by means of a pinion M in gear with a rack cut in the slide. The shaft L carrying the pinion is enclosed for a portion of its length in a sleeve H formed in one with the disc F and rotating in a bearing. The other end of the shaft L has adjustably secured to it a sleeve N also rotating in a bearing. The adjacent ends of these sleeves are enclosed by a sleeve 0, Fig. 3, in which is cut a pair of oppositely-inclined helical grooves d, d containing movable blocks e, e pivoted to the sleeves. The sleeve 0 has on it a collar or flange b engaged by one end of a bell crank Q, the other end of which is connected to a hand reversing-lever by which the expansion can be varied or the engine reversed while in motion. In mechanism for the purpose described, a slide having a wrist pin on which is thereon on which is journaled the valve connecting rod in combination with a disk having guides thereon in which the said slide may move: a suitably journaled sleeve on which the said disk id fast; means for revolving the said sleeve from some moving part; a shaft within the sleeve; a connection between the shaft and the slide whereby the latter may be moved by the turning of the shaft.
This is one of 81,825 patents currently in the database at datamp.org

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