https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=84584&pn=1,765,316 Metal-Sawing Machine Patentees: John S. Toohey - Racine, Racine County WI , Malcolm E. Erskine - Racine, Racine County WI Granted:1930-06-17
Manufactured by Racine Tool & Machine Co. - Racine, Racine County WI
Assigned to Racine Tool & Machine Co. - Racine, Racine County WI

Abstract: This invention relates to metal sawing machines of the hack saw type, in which the saw carrying. yoke receives reciprocation in an approximately horizontal direction, with said yoke with the frame on which it is guided pivotally mounted on the machine frame so as to be capable of a swinging movement in a vertical direction and permit the downward movement of the saw blade as the sawing operation progresses, as well as an upward movement of the saw carrying yoke and its guide frame, out of the way, with a completion of one sawing operation, and a subsequent resetting of the parts for a succeeding operation and the present improvement has for its objects To provide a commercially practical structural formation and combination of parts, whereby the saw blade is positively fed into the work during the entire active or cutting stroke of the saw blade, with the construction admitting of the automatic raising of the saw blade clear of such work during the return or inactive stroke of the saw blade. Claim: In combination a metal sawing machine, saw blade, a movable supporting means for said saw blade, means for importing reciprocation to the saw blade in relation to said supporting means, means for imparting continuous and unyielding downward movement 15-:o said supporting means and saw blade during the entire cutting stroke of the saw blade, the same comprising a screw shaft, manually adjustable automatic means for~ imparting intermittent rotation to said screw shaft, a head encircling said screw shaft, a pair of split nut members associated with said head and haying eccentrically formed outer sides, an oscillatory support associated with the screw shaft, opposed members on said support in engagement with the eccentric sides of said nut members, manual means for imparting movement to said oscillatory support, and a link connection extending from said head to the aforesaid supporting means.
This is one of 83,881 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=52412&pn=1,635,259 Cylinder Head Lifting Tool Patentee: James Verner Critchley - Worcester, Worcester County MA Granted:1927-07-12
Manufactured by Walden-Worcester Inc. - Worcester MA
Assigned to Walden-Worcester Inc. - Worcester, Worcester County MA

This "T" handle tool with threaded collar matching spark plug thread size would work with engines having spark plug ports on the top. A Febr. 1928 "new product" listing shows this as "Pat. Pend." No. L3 "head lifter." It was introduced during the period when STEVENS was moving toward merger with WALDEN-WORCESTER. A known example's markings include the patent number.
This is one of 83,881 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=84583&pn=1,564,114 Portable Rail-Sawing Machine Patentee: W. C. Reinhardt - Racine, Racine County WI Granted:1925-12-01
Manufactured by Racine Tool & Machine Co. - Racine, Racine County WI
Assigned to Racine Tool & Machine Co. - Racine, Racine County WI

Abstract: This invention relates to the class of metal sawing machines of the cross cut type in which the saw carrying frame reciprocates in an approximately horizontal direction anti has a swinging movement in a vertical direction to attain1 the proper feed or cut of the saw in the continued operation of the machine, and snore particularly to the portable type of such machines used for sawing track rails in situ. Claim: In a portable sawing machine of the class described, the combination of a main frame having one of its lower corners formed for bearing engagement with the bottom flange of a railway or like rail so as to position the frame wholly to one side of said rail, a vertically movable and horizontally reciprocating saw blade with its carrying and operating mechanism mounted on said frame, an upright guide post fixed on said frame, and a claw member formed for engagement with a top flange of the aforesaid rail and attached to the upright post in a vertically and a horizontally adjustable manner, the weight of the main frame and mechanism mounted thereon tending to cant and bind the aforesaid' means of attachment upon the rail.
This is one of 83,881 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=57309&pn=3,088,249 Grinding Machine Patentees: Lyman B. Pope - Kingston, Rockingham County NH , John W. Sjostrom - Salem, Rockingham County NH Granted:1963-05-07
Assigned to Pope Machinery Corp. - Haverhill, Essex County MA

Abstract: This invention relates to a grinding machine in which adaptability to various uses is combined with a high degree of accuracy. The machine hereinafter described and illustrated on the drawings is quickly and easily adaptable for internal or external grinding, and can, for example, be used to grind standard centers or antifriction centers to accurate taper angles. Claim: A grinding machine comprising a bed having thereon, a raised platform with an accurately plane surface and an elongated aperture therethrough, a movable grinder head unit having a plane bottom face bearing on said plane surface and universally adjustable thereon, means extending through said aperture for clamping said unit in any position of adjustment, and means on said bed for supporting and rotating a workpiece in an operative position relative to said grinder head unit, said work-supporting means having means for fine angular adjustment thereof about a vertical axis.
This is one of 83,881 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=84580&pn=1,563,870 Hack Saw Patentees: William C. Reinhardt - Racine, Racine County WI , Arthur W. Lundgren - Racine, Racine County WI Granted:1925-12-01
Manufactured by Racine Tool & Machine Co. - Racine, Racine County WI
Assigned to Racine Tool & Machine Co. - Racine, Racine County WI

Abstract: In power driven hack saws as heretofore constructed, difficulty has been encountered due to the dropping of the saw and frame after the completion of the cutting operation, frequently breaking the saw and occasionally injuring the operator. A further difficulty has been experienced in removing the finished work and positioning new work in the machine. The operator usually has to hold or jack up the saw, to maintain it in elevated position while the old work is being removed and the new work inserted. Claim: A power driven hack saw comprising a saw frame, means for reciprocating said frame, a pivotally mounted guide for said frame, means for lifting said frame upon the idle stroke, means for releasing said lifting means at the beginning of the working stroke, and other means including a pawl and ratchet for operatively supporting said frame when said lifting means is released to limit the downward motion of said frame during each working stroke.
This is one of 83,881 patents currently in the database at datamp.org

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