https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=76445&pn=37,980 Steam Engine Indicator Patentee: C. B. Richards - Hartford, Hartford County CT Granted:1863-03-24
Assigned to C. T. Porter - New York NY

This was the first steam engine indicator patented in the U. S. Abstract: My invention relates to an improvement in apparatus for indicating and delineating the action of steam in the cylinder of a steam engine. The form of steam-engine indicator in most general use is that commonly known as the "McNaught indicator," in which the piston and its guiding-rod have the same range of motion as the pencil but as the piston and rod are necessarily made quite heavy, and their range of motion extensive in order to produce delineations on a sufficiently-large scale, the momentum of these parts is so great as to render the instrument unserviceable for application to engines having rapid movement. While, therefore, it is desirable to reduce the momentum of the parts which are moved by the varying pressures of the steam, it is also desirable that the pencil or marking-point should move in a straight line, in order that its delineations, which should be on a large scale, may readily be measured with accuracy, and in order, also, that the paper on which the delineations are made may be clamped in the usual manner around a cylindrical drum, to which the requisite movements can be readily given by the customary means. To furnish an instrument possessing the above-mentioned desirable features is the object of my invention ;and to this end my said invention consists in the employment of a lever or its equivalent so connected with the pencil and the piston as to give to the pencil a range of motion greater than that of the piston, in combination with a system of levers, or an equivalent therefor, so arranged as to cause the pencil's point to travel in a straight line. Claim: he means, substantially hereinbefore de-scribed, for giving to the marking-point a range of motion greater than that of the piston by which it is actuated, in combination with the described means, or an equivalent therefor by which the marking-point is caused to travel in a straight line.
This is one of 84,008 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=84711&pn=RE8,433 Valve-Gear for Steam-Engines Patentee: Joseph W. Thompson - Salem, Columbiana County OH Granted:1878-09-24
Manufactured by Buckeye Engine Co. - Salem, Columbiana County OH
Assigned to Buckeye Engine Co. - Salem, Columbiana County OH


This is one of 84,008 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=84710&pn=162,715 Valve-Gear for Steam Engines Patentee: Joseph W. Thompson - Salem, Columbiana County OH Granted:1875-04-27
Assigned to Buckeye Engine Co. - Salem, Columbiana County OH

Abstract: The invention relates to the construction and arrangement of devices for connecting the main valve and its sliding cutoff valve with the eccentrics from which they derive motion, that of the cutoff valve being adjustable around its center of rotation. Claim: The double-armed rockshaft, R, of the cutoff valve, mounted on the rock-arm, S, of the main valve, which is operated by a fixed eccentric, in combination with an eccentric arranged for adjustment around its center of motion, and the rods connecting said parts, whereby the movement of the cutoff is varied.
This is one of 84,008 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=73537&pn=314,353 Steam Engine Governor Patentee: Joseph W. Thompson - Salem, Columbiana County OH Granted:1885-03-24
Manufactured by Buckeye Engine Co. - Salem, Columbiana County OH
Assigned to Buckeye Engine Co. - Salem, Columbiana County OH

My invention relates to centrifugal governors or regulators of the class set forth in the following Letters Patent of the United States, upon which it is an improvement, to wit: Reissued Letters Patent No. RE8,433, dated September 24, 1878, to myself and the Buckeye Engine Company as my assignee, and Letters Patent No. 204,924, dated June 18, 1878, to myself and Nathan Hunt and said Buckeye Engine Company as our assignee. Abstract: The object of my present invention is to promote the attainment of perfect isochronal regulation by counteracting the variable accretion of centripetal force induced in the operation of a governor of the type above specified by the action of the resistance of the parts actuated by the movable eccentric under different degrees of leverage in different positions of the weight-arms. To this end my invention, generally stated, consists in the combination, with a movable valve-operating device and weighted arms and springs adapted to vary the position thereof in opposite directions by the action of centrifugal and centripetal force, respectively, of auxiliary centrifugally acting springs adapted to supplement the action of the weights during the moiety of the traverse of their arms adjacent to the inward limit of their range of motion. Claim: In a centrifugal governor of the type specified, the combination, substantially as set forth, of a movable valve-operating device, a weighted arm and centripetally acting spring adapted to vary the position of such device in opposite directions by the action of centrifugal and centripetal force, respectively, and an auxiliary spring adapted to supplement the centrifugal action of the weight during the moiety of the traverse of its arm adjacent to the inward limit of its range of motion.
This is one of 84,008 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=84516&pn=684,958 Tire-shrinker Patentees: John H. Thompson - Nevada MO , Thomas Peperson McCullough - Nevada MO Granted:1901-10-22

This tire shrinker is to be mounted on an anvil.
This is one of 84,008 patents currently in the database at datamp.org

]]>