https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=83117&pn=412,215 Machine for Cutting Special Pinions Patentees: Edward P. Walter - Bridgeport, Fairfield County CT , Henry C. Walter - Bridgeport, Fairfield County CT Granted:1889-10-01
Assigned to Manning, Maxwell & Moore - New York NY

Abstract: Our invention relates to certain new and useful improvements in machines for cutting spiral pinions or for producing any description or pitch of thread upon shafts or other work of cylindric form, and has for its object to provide mechanism partly rotary and in part reciprocatory, whereby the cutting of said threads may be economically and rapidly accomplished; and with these ends in view our invention consists in the details of construction and combination of elements. Claim: he combination, with the bed, the turn-table, the carriage mounted thereon, the chuck arranged upon the carriage, and means, as described, whereby forward motion may be imparted to the carriage and both forward and rotary motion to the chuck, of the cutting-tool and carriage mounted above the work carriage and adapted to be reciprocated.
This is one of 84,022 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=84390&pn=32,149 Air and Steam Engine Patentees: R. E. Rogers - Philadelphia PA , James Black - Philadelphia PA Granted:1861-04-23

Abstract: Atmospheric air and steam, and air and water heated either by the air or otherwise to the vaporizing point, and air and the gaseous products of combustion and steam have been mingled or associated, and used as a motive power. Desirable as is the result of turning to profitable account the expansive and elastic power of so cheap and safe a material as air, yet none of the devices for employing it, either alone or in conjunction with steam, have hitherto been productive of any large amount of effective power, when compared to the dimensions of the engine used. In all instances when these elements have been used, the air, or other gaseous material, has been fed into the steam or water by means of a force-pump or air- pump driven by the power of the engine. So much, therefore, of the power of the engine as is consumed in forcing in the air, is necessarily lost; and this is the serious objection and chief drawback to the employment, in the ordinary way, of air in connection with steam. By our invention, which is self-acting in its operation, the air ]s introduced and commingled with the steam, through the agency and by the power of the current of the steam itself on its way from the generator to the motive cylinder of the engine. Our invention is based upon the principle that a current of steam, air, or other fluid hotly issuing from an orifice will carry along with it any other fluid body surrounding it. Claim: What we consider as new and original is the method of using air and steam as a motive power; and we may state that we have clearly ascertained that by this method of intimately combining or blending the air and steam, the "latent caloric " of the steam, to say nothing of its "sensible caloric " is rendered remarkable available in expanding the air, whose "specific heat" or "capacity for caloric" is known to be low.
This is one of 84,022 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=84725&pn=126,383 Improvement in Compound Steam Engines Patentee: Charles E. Emery - New York NY United States Granted:1872-05-07

Abstract: My invention consists, first, of the combination, with the lower cylinder of a vertical compound engine, of a smaller cylinder provided with braced legs which extends outside the cylinder-head of the lower cylinder, and are supported upon said cylinder, or, through rods, upon the engine -framing, such combination holding the upper cylinder rigidly and permitting the lower cylinder-head to be raised in the ordinary way a sufficient distance to permit the examination of the piston and the adjustment of its parts; second, long studs extended between the intermediate stuffing-boxes of a steepled compound engine, with nuts on same to secure both glands, in combination with divided and slotted glands, all parts being arranged so that they can be readily removed to permit the lifting of the cover of the lower cylinder; third, the arrangement of both the main and the cutoff valve-seats of the upper and lower cylinders at the same, or nearly the same, distance from the center of cylinders, to permit the valves to be operated by simple direct connections from one to the other; fourth, the method of working the steam expansively in a compound engine, by cutting off the steam in the larger cylinder at such point that the fall of pressure in the passages during the time that said cylinder is receiving steam there- from, is substantially restored during the time that the supply of steam to said cylinder is cut-off by the compression into the passages of the steam remaining in the small cylinder, and thereby transferring the expansion from one cylinder to the other with far less loss of effect than has ever before been accomplished when the cylinders were separated from each other; fifth, a pipe or reservoir to connect the two cylinders of a compound engine when loss of effect from the use of the same is prevented in the manner above expressed; sixth, an independently-adjustable cut-off for the larger cylinder of a compound engine, to enable adjustment to be made, as desired, to secure maximum economy or facility in starting; seventh, the arrangement, in the passages connecting the two cylinders of a compound engine, of devices for drying the steam, first by gravity and afterward by the direct application of heat to produce economy of steam; eighth, the arrangement of a check-valve in the passage between the two cylinders of a compound engine to assist in starting and backing the engine. Claim: The combination, with the lower cylinder of a vertical compound engine, of a smaller cylinder provided with braced legs which extend outside of the cylinder-head of the lower cylinder, and are supported upon said cylinder, or through rods upon the engine-framing, in such manner as to permit the raising of the lower cylinder-head.
This is one of 84,022 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=84724&pn=482,530 Boring Apparatus Patentee: Frederick H. Kind - Racine, Racine County WI Granted:1952-04-15
Assigned to Racine Tool & Machine Co. - Racine, Racine County WI

This Boring Apparatus was patented in the U. S., patent #2,519,476. Abstract: The object of the invention is to provide an eccentrically adjustable boring bar and control means for the same whereby roughing, semi-finishing, and finishing boring operations with a single bar provided with a plurality of cutters may be readily accomplished. A further object of the invention is to provide a pivotally mounted boring bar mounted on a spindle provided with a sliding actuating sleeve or cam for angularly shifting the cutters of the bar and holding them in an adjusted position, the shifting mechanism for said bar including a member adapted to be moved to predetermined set positions. Claim: In a boring apparatus in which the work and a boring member are given a reciprocatory and rotary movement relative to each other, the combination with said boring member provided with relatively fixed roughing and finishing cutters projecting from diametrically opposite sides of said member, of a support for pivotally mounting said member for eccentric positioning relative to the work, means for angularly shifting said member about its pivot in diametrically opposite directions comprising a shiftable sleeve cam member operatively engageable with a part of said boring member, and means for longitudinally shifting said cam member in opposite directions to shift said boring member with its cutters in diametrically opposite directions to bring the different cutters successively into operative relation with the wall of the work being bored.
This is one of 84,022 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=42304&pn=1,075,710 Set Screw Or The Like Patentee: Dwight S. Goodwin - Waterbury CT Granted:1913-10-14
Manufactured by Goodwin Hollow Set Screw Company - Waterbury CT
Assigned to Oscar F. Fitzsimons - Waterbury CT

The patent covers the "dovetail" grooves in the recessed central socket of the set screw, and the corresponding splines on the wrench. Introduced as the GOODWIN HOLLOW SETSCREW; produced as the BRISTO screw and matching wrenches. Contemporary ads note the screws could also be turned by a screwdriver with appropriate blade width.
This is one of 84,022 patents currently in the database at datamp.org

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