Precise Products Corp. - Assigned Patents

Manufacturers Index - Precise Products Corp.

Precise Products Corp.
Racine, WI, U.S.A.
Manufacturer Class: Metal Working Machinery

Patents

This page contains information on patents issued to this manufacturer.

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Patent Number	Date	Title	Name	City	Description
2,031,133	Feb. 18, 1936	Electric Hand Tool	Robert SchÃ¼mann	North Rhine-Westphalia,, Germany	Application filed in Germany, 25 Jan., 1932 Claim: The object of the invention is to produce a tool of the above mentioned kind in which the pressure exerted by the operator for pressing the tool against the workpiece cannot exceed the turning movement necessary for the individual sizes of screws, so that, whilst ensuring against overturning of the screw, there is a control that the screw is sufficiently strongly tightened and it is possible to adjust the turning movement for the individual sizes of screws. In the known tools of the aforementioned type the turning movement exerted on the portion of the tool engaging the workpiece is merely determined by the pressure-exerted on the tool which can lead to the overturning of the screw to be tightened or to an insufficiently strong tightening of the screw.
2,170,036	Aug. 22, 1939	Small electric machine tool	Robert Schumann	, Germany	The inventor was the son of instrument maker Adolph Schumann, whose "Firma A. Schumann", founded 1882, manufactured optical equipment and scientific instruments. Robert Schumann's invention was a handheld rotary tool which is now known as a "Dremel tool". But Albert J. Dremel came later; first was Schumann's invention which was manufactured by A. Schumann and sold in Europe as the "Diros". As late as the 1980s Diros tools were being imported into North America. A 1932 issue of "American Progress" (Vol. 13-14 p. 127) mentions "The 'Diros' drill, built by A. Schumann, drills holes up to 3 mm (0.12 in.) in brass and up to 2 mm (0.08 in.) in steel..." By the time this patent was issued, the inventor and his family had fled Nazi Germany for the US, where they would settle in Racine, Wisconsin. He established Precision Products Co. and began manufacturing handheld rotary tools, which were adopted by the US military. We have also seen "Precise" brand handheld/toolpost grinders made in DÃ¼sseldorf, West Germany, by Precise Gmbh Fabrik fÃ¼r Elektrowerkzeuge ("Power Tool Factory"), and bearing this patent number plus 2,031,133, 2,368,888, 2,377,271, and 2,452,268.
2,368,888	Feb. 06, 1945	Small Electric Machine Tool	Robert SchÃ¼mann	Racine, Racine County, WI	Application filed in Germany, 12 Feb.. 1939. Claim: By the invention a connection between motor shaft and cutting spindle has to be produced which renders harmless and prevents any axial inaccuracies between cutting spindle and motor shaft, so that shocks exerted upon the cutting spindle and oscillations of the latter no longer act upon the motor shaft. The connection must further be of such type, that it automatically adjusts itself gyroscope-like during the running of the tool into such a position that its central axis or its axis of gravity coincides with the turning axis.
2,377,271	May. 29, 1945	Flexible Shaft And Air-Cooled Hand Piece	Robert SchÃ¼mann	Racine, Racine County, WI	Claim: At the present time flexible shafts are used as a unit in fixed attachment to stationary motors. These flexible shafts, which are used for rotating various types of implements such as grinders, drills, buffers, sanders and the like, have band pieces which, due to the high speed at which the flexible shaft core rotates, become very hot, thus necessitating frequent interruption of the work being done to permit the hand piece to cool. Some hand pieces are provided with. insulation covering but such covering does not fully protect the operator's hands against the heat developed.
2,452,268	Oct. 26, 1948	Motor Hand Tool Assembly	Robert SchÃ¼mann	Racine, Racine County, WI	Claim: A tool assembly including an operating shaft, a motor to operate said shaft, means operable by one of said parts to induce air to travel in heat-transferring relation to the assembly and discharge adjacent the tool-operating end of the assembly and means for imparting whirling action to the air at a point adjacent its discharge from the assembly.
2,532,823	Dec. 05, 1950	Motor tool	Helmut W. Schumann	Racine, WI	Improvements to patent 2,170,036.
2,696,569	Dec. 07, 1954	Motor Tool	Hellmut W. Schumann	Racine, Racine County, WI	The present invention relates to electric motor tools and particularly to improvements in the tool disclosed in my Patent No. 2,532,823, issued December 5, 1950. Claim: Tools of the general character referred to may be held and guided by the hand of the operator, or they may be fixed in a stationary mount to have the work brought to the tip or bit, or they may be mounted in the machine that guides the tip or bit relative to the work, or vice-versa. Tools of this character employing grinding wheels, tungsten carbide bits, or other hard duty cutting or abrading bits, are now frequently employed in machines which advance the tool relative to the work by a lead screw or other machine feed. For this purpose, the motor may, by way of example, operate at speeds of the order of 15,000 to 45,000 R. P. M., with a power output of the order of one-fifth to three-quarters of a horsepower.
2,779,883	Jan. 29, 1957	Motor tool	Helmut W. Schumann	Racine, WI	Improvements to patent 2,532,823.