https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=85470&pn=106,410 Improvements in saw tooth swaging machines Patentee: Henry Smart - Sheffield England Granted:1917-05-24
Manufactured by Spear & Jackson Ltd. - Sheffield England
Assigned to Spear & Jackson Ltd. - Sheffield England

An example has been seen that reads Elect and Pat. No. 106410. The patent assignment shows that Spear & Jackson was very likely the manufacturer—if not them, then it was a subcontractor or perhaps a licensee.
This is one of 85,271 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85982&pn=1,850,268 Positioning tool Patentees: Harry W. Kulp - Lancaster PA , Martin C. Dellinger - Lancaster PA Granted:1932-03-22
Manufactured by K-D Mfg Co. - Lancaster PS

Specialty tool for holding "keepers" during installation of valve springs in some type of engines. The specifications describe the specifics; the patent drawing includes a generalized drawing of the work environment. Listed in 1935 K-D catalog as no. 605 Valve Keeper Inserter.
This is one of 85,271 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85931&pn=1,490,200 Sanding machine Patentee: Emil F. Butts - Tacoma WA Granted:1924-04-15
Manufactured by Gregory-Butts Co. - Tacoma WA
Assigned to Edwin Gregory - Tacoma WA


This is one of 85,271 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85947&pn=64,117 Toy Patentee: William E. Lincoln - Providence RI Granted:1867-04-23
Manufactured by Milton Bradley & Co. - Springfield MA
Assigned to Milton Bradley & Co. - Springfield MA

In 1834, British mathematician William George Horner invented a device for creating animation using a series of still images: the images are wrapped around the inside of a drum with slits in between the figures. By peering through the slits, one image at a time is revealed in such a way that the viewer perceives not a series of still images, but a single image that moves. In 1867 William E. Lincoln, an 18 year old student at Brown University in Providence, RI, improved on Horner's invention by moving the slits above the images, which made it easier to use replaceable image strips. The patent calls the device a "zoëtrope", a word Lincoln created by combining the Greek works for "life" and "turn". This toy was manufactured by Milton Bradley & Co. It was quite successful and engendered numerous variations on the idea. Nowadays zoetropes are remembered as an important stepping stone toward the development of motion pictures.
This is one of 85,271 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85948&pn=2,487,803 Spring retaining ring Patentee: Heinrich Heimann - New York NY Granted:1949-11-15
Manufactured by Waldes Koh-I-Noor, Inc. - Long Island City NY
Assigned to Waldes Koh-I-Noor, Inc. - Long Island City NY

This snap ring is designed so that it can be installed over the diameter of the shaft without having to start it at the end of the shaft, since the shaft ends are often inaccessible to the snap-ring groove once the shaft has been installed. Previous snap rings either required access to an end of the shaft or else they did not securely press against the bottom of the groove. This pressure against the groove bottom keeps the snap-ring seated and helps prevent it from rotating relative to the shaft. The Czech firm of Waldes Kohinoor had been established in 1902 in Prague by Jindřich Waldes and Hynek Puc to manufacture buttons, snaps and similar items—at first just for clothing but they eventually expanded into industrial fasteners as well.
This is one of 85,271 patents currently in the database at datamp.org

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