DATAMP

US Patent: 396,361

Rolling Die Machine Patentee: William H. Johnson - Racine, Racine County WI Granted:1889-01-15


This is one of 65,136 patents currently in the database at datamp.org

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US Patent: 3,217,567

Horizontal Boring Mill Patentees: Edward P. Bullard III - Fairfield, Fairfield County CT , Edward P. Bullard IV - Fairfield, Fairfield County CT Granted:1965-11-16


This is one of 65,135 patents currently in the database at datamp.org

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US Patent: 3,110,996

Grass cutting machines Patentee: Karl Rudolf Dahlman - Malmo Sweden Granted:1963-11-19

This is the patent for the "Flymo", a wheel-less lawnmower that was all the rage for a couple of years in the mid-1960s. In the USA the Flymo design was licensed to Toro. The Flymo mowers proved to be a bit difficult to control, especially on slopes, and left an irregular cut because the blade pushes down the air which tends to flatten the grass as well.
This is one of 65,130 patents currently in the database at datamp.org

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GB Patent: 191,329,328

Improvements in and Relating to Steam Injectors. Patentees: Harry Edward Gresham - Salford, Lancashire County England , Frank James Gresham - Salford, Lancashire County England Granted:1914-03-12

Abstract: Giffard injectors; regulating.-In a live-steam injector, an annular passage a between the usual live-steam nozzle b and the water-inlet cone c admits exhaust steam to be absorbed by the feed-water before it is impinged upon by the live steam. The supply of exhaust is regulated by a spring-pressed valve f on the exhaust passage g which is acted upon by the steam in the engine valve chest through the intermediary of the passage h, piston i, and stem j. A positively-operated valve m enclosing the valve f may also be used for regulation. The device for regulating the supply of exhaust forms the subject of Application 29,328/13. When no exhaust steam is available, the discharge from the small continuously-working ejector of a brake system may be admitted, or a throttled supply of live steam.
This is one of 65,127 patents currently in the database at datamp.org

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US Patent: 256,265

DATAMP Wacky Patents - June 12, 2020 - 11:16am
Device for waking persons from sleep Patentee: Samuel S. Applegate - Camden NJ Granted:1882-04-11

1 of 12 patents in the Parker Brothers Inventor's Game. Another is 221,855 Here as part of Russ Allen's MWTCA Gadgets, Gizmos, and Mechanical Marvels display.
This is one of 65,127 patents currently in the database at datamp.org

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US Patent: 298,329

Injector and Ejector Patentee: Joseph Wotapek - New York NY Granted:1884-05-06


This is one of 65,109 patents currently in the database at datamp.org

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GB Patent: 191,511,790

Improvements in Short-Circuiting and Brush Lifting Gear for Alternating Current Motors Patentee: Henry Bertram Whitmore - Brereton Cottage, Cheshire County England Granted:1916-08-10

Abstract: Alternating - current induction machines; brush-holders; collecting-rings.- In slip - ring short - circuiting and brush-lifting gear for induction motors, each slip-ring P, Q, R is electrically connected to a pair of bars p p<1>, q q<1>, r r<1> which extend axially through the other two slip-rings but are insulated therefrom; each bar. may be made in two parts screwed into a slip-ring, as shown in connection with the bar q and slip-ring Q. The respective pairs of bars are connected together at one end by contact plates p<2>, q<2>, r<2>; at the other end, the three ends p<3>, q<3>, r' of the rotor windings are connected respectively to one bar of each pair. A rotating sleeve D carrying three tangentially-arranged shortcircuiting brushes E may be moved axially into contact with the plates p', q', r' to short-circuit the slip-rings, the edges of the plates being bevelled to allow the brushes to slide into position. The sleeve D is held in its end position by means of a spring- pressed ball d' engaging notches in the shaft. Axial movement is imparted to the sleeve by means of a crank-pin entering a groove therein and carried by a shaft f<1> fitted with a hand-wheel f<2>; the crank-pin is connected by a spring S to a projection s<1> on the casing tending to hold the crank in one or other of its extreme positions. Each slip-ring is fitted with a pair of brushes B carried from pins b<1> in brackets b<2>, and the extensions b<3> of the fingers b<4> overlap in elevation; the brackets b<2> are carried by, but insulated from, the brush-carrying bars b<5>, and the two brushes of each pair are connected together by a strip b<6> and are joined to a connecting-lug b<7>. The brushes are lifted off the slip-rings by the tall-pin h<5> carried by the lever H fulcrumed on the pivot h<2>; the lever H is fitted with an adjustable stop-pin h<3>, and a spring h<4> tends to keep the lever in position. The lever also carries a second tailpin h<1>, which extends underneath the extensions b<3> of the brush-fingers b<4>. In a modification, the contact plates p<2>, q<2>, r<2> are straight and are also tangentially arranged. The movement of the shaft f<1> may be effected automatically by means depending on the speed, voltage, current, or frequency.
This is one of 65,105 patents currently in the database at datamp.org

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