https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=84614&pn=414,619 Screwdriver Patentee: Julius Weiss - New York NY Granted:1889-11-05


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]]> https://www.datamp.org/patents/displayPatent.php?id=84612&pn=25,992 Beer Cooler Patentee: Jean Louis Baudelot - Harancourt, Ardennes Department France Granted:1859-11-01
Manufactured by George B. Turrell & Co. - New York NY


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]]> https://www.datamp.org/patents/displayPatent.php?id=84611&pn=332,293 Device For Weaning Calves Patentees: Henry Shank - Colorado Springs CO , William E. Meek - Colorado Springs CO Granted:1885-12-15

A "blocking plate" device with a sliding latched portion forming the nose clip.
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]]> https://www.datamp.org/patents/displayPatent.php?id=84610&pn=354,140 Calf-Weaner Patentee: Charles E. Hubbard - (North) Topeka KS Granted:1886-12-14

The design is intended as a "suction breaker" rather than "access blocker." Compare its intended action to designs like 169,670 and 175,640.
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]]> https://www.datamp.org/patents/displayPatent.php?id=57346&pn=179,301,943 Steam engine Patentee: Matthew Pitts - Abinger, county Surrey England Granted:1793-03-25

Matthew Pitts was a Captain in His Majesty's Corps of Royal Engineers. According to the article on boilers in the 1921 edition of Winston's Cumulative Loose-leaf Encyclopedia, "One idea which hindered advancement in boiler design for many years was that in order to generate a large quantity of steam the boiler should contain a large and compact volume of boiling water. Matthew Pitts (1793) seems to have been the first to definitely recognize the error of this belief. He found that the quantity of steam was proportional to the surface exposed to the heat. This truth indicates that as a steam generator the spherical form is the poorest, as it has the least exposed surface for a given volume. The plain cylindrical or tank boiler is the best of the early forms." Abstract: The improvement on the steam engine relates to the piston in the great or house cylinder, the padding or stuffing whereof, which surrounds the circumference of the piston is so contrived that as it wears away, it is extended and made to fit the cylinder without fresh padding or stuffing, or being taken out, as has hitherto been the practice, which not only occasioned great labor, but considerable loss of time.
This is one of 83,912 patents currently in the database at datamp.org

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