https://www.datamp.org/ Recently added patents en-us https://www.datamp.org/patents/displayPatent.php?id=56695&pn=D95,616 Design for a tape measure Patentee: Herbert F. Ritter - Bogota NJ Granted:1935-05-14
Manufactured by H. F. Ritter Mfg. Co. - New York NY

An example of this patent is reported, labeled only "Integrity Rule", a brand used by H. F. Ritter Mfg. Co. The patentee operated that firm, whose business office was in New York City. Despite the name this firm seems to have been more of an importer than a manufacturer. They sold a broad line of mechanics' and machinists' tools and they did contract screw machine work.
This is one of 85,128 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85833&pn=656,874 Acetylene-gas lamp Patentee: Frederic E. Baldwin - New York NY Granted:1900-08-28

This patent is the advent of the "carbide lamp". The patent contemplates its use as a bicycle or carriage lamp. The carbide lamp was also as used by miners during the relatively brief interval between this patent and the widespread availability in mines of generator-powered electric lighting. The carbide lamp in this patent contains calcium carbide and water which are mixed in a controlled manner to generate acetylene gas which is then fed to a burner orifice and ignited. This general form of lamp was already known but the inventor addressed a problem with earlier designs that used a needle-valve to meter out the water, and such valves were prone to clogging from sediment and erosion by the corrosive acetylene gas. Instead a rubber washer is used to create the upper service of the valve, and that washer bears against a small hole in the bottom of the water reservoir. Extending through the center hole in the rubber washer and through the bottom of the reservoir is a metal wire that extends down into the water reservoir and up through the top of the lamp where the wire's end is bent at 90 degrees to form a pointer. Surrounding the hole in the bottom of the reservoir is a circular depression with an additional wedge-shaped depression. The L-shaped end of the wire lies along a surface that is slightly sloped so that rotating the wire in one direction or the other will slightly raise or lower the length of wire and hence allow more or less water to flow. The mechanism is claimed to provide "an extremely nice adjustment of the valve and accurate control of the flow of water".
This is one of 85,128 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85831&pn=4,572,038 Multi-purpose tool Patentee: Charles H. Graham - Salt Lake City UT Granted:1986-02-25
Manufactured by Tekna-Tool, Inc. - North Salt Lake UT
Assigned to Tekna-Tool, Inc. - North Salt Lake UT

"... the multi-purpose tool of the present invention ... comprises a handle, a shaft having one end firmly attached to the handle and a distal end extending outwardly from the handle, a cylinder assembly which slidably engages the shaft, a plurality of working tips stored in the cylinder assembly, and a means for selecting and coupling any of the working tips to the distal end of the shaft." The tool holding "drum" is analogous to the ammunition holding cylinder in a "revolver" firearm. This patent and D288,168 were used for the TEKNA-TOOL multi-bit screwdriver and Dial-A-Tool hex driver set.
This is one of 85,128 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85836&pn=970,729 Spirit Level Patentee: George W. Lingle - Burlington WI Granted:1910-09-20


This is one of 85,128 patents currently in the database at datamp.org

]]> https://www.datamp.org/patents/displayPatent.php?id=85835&pn=2,394,807 Combination pliers for twisting wire Patentee: Ralph C. Robinson - North Sacramento CA Granted:1946-02-12
Manufactured by Ralph C. Robinson Co. - North Sacramento CA

The focus of the patent is the structure of the wire gripping mechanism, where the wire is twisted while the handles remain stationary. Often referred to as "safety wire pliers." A "new old stock in original box" example is known. Advertised in appropriate industry trade journals, etc.
This is one of 85,128 patents currently in the database at datamp.org

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