https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=85364&pn=830,980 Door Holder Patentee: Samuel B. Dutro - Mason City IA Granted:1906-09-11
Manufactured by Dutro Mfg. Co. - Mason City IA

One of these appeared in a Martin J. Donnelly auction
This is one of 84,661 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85363&pn=14,486 Steam-Engine Valve-Gear Patentee: Orville Leonard - Somerville, Middlesex County MA Granted:1856-03-18
Assigned to George H. Reynolds - Unknown Unknown

Abstract: Various methods have been devised for i5 the purpose of regulating the amount of steam admitted to the cylinder; to the varying amount of work upon the engine by means of the governor balls, most of these methods are complicated, and can only be applied to engines built expressly for the purpose, while the original cost of those which are most effective is such that they cannot with economy be applied to engines of small size. Claim: To the rocker d, the toe g and the bar G.
This is one of 84,661 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=51718&pn=243,881 Road Engine Patentee: Abraham O. Frick - Waynesborough, Franklin County PA Granted:1881-07-05
Manufactured by Frick Co. - Waynesboro, Franklin County PA

Abstract: My invention relates to certain improvements in road-engines, designed to improve the construction and operation of these devices. The principal features of improvement consist in the structure of the frame-work and means for hanging the boiler therein to compensate for expansion; in the means for connecting the engine and the frame so as to avoid working-strain on the boiler-sheets; in the construction and arrangement of the front truck, and in the means for guiding the engine. Claim: The side sills, A A, made longer than the boiler, and combined with the same by strap or straps C and a single rigid connection, a, and extending in rear of the boiler.
This is one of 84,661 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85362&pn=14,449 Steam-Boiler Cleaner Patentee: Jacob Frick - Philadelphia PA Granted:1856-03-18
Manufactured by Frick Co. - Waynesboro, Franklin County PA

This patent was improved with patent #22,284. Abstract: My invention consists in arranging together, in one instrument, a check valve, stop valve, and blow off valve for steam boilers, in such a manner that the whole may be secured to the boiler by one attachment only, thereby avoiding the necessity of piercing and wounding the boiler in several places for the purpose of making the separate and distinct attachments hitherto employed for the same purpose. It further consists in employing, in connection with the above valves and cocks, a pressure valve and alarm apparatus fully described hereafter for the purpose of notifying the attendant engineer when any undue obstruction is offered to the regular flow of water, from the feed pump to the boiler. Claim: Arranging substantially in the manner set forth, a check valve, and stop and blow off valve, in one instrument, for steam boilers, for the purpose of avoiding the attachment of the separate and distinct connections hitherto employed for the same purpose.
This is one of 84,661 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=82957&pn=D180,004 Metal-Cutting Shears Patentee: Clarence M. Anderson - Chicago IL Granted:1957-04-09
Manufactured by MALCO Products, Inc. - Annandale MN

The design appears to aim for weight reduction by having open web handles. The patent number appears together with 2,801,467 on MALCO "ANDY" shears. Term of patent 14 years. A 1972 MALCO catalog listing shows these made of cast aluminum with replaceable shear blades. The physical appearance also copies Anderson's patent no. 2,801,468, where the drawings include details on how the handle shape facilitates gripping the shears. Patents D101,791, 2,343,527 and 2,661,534 cited as references.
This is one of 84,661 patents currently in the database at datamp.org

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