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Manufacturers Index - DeWalt Products Co.

DeWalt Products Co.
Leola, PA; Lancaster, PA; Towson, MD, U.S.A.
Company Website: http://www.dewalt.com/
Manufacturer Class: Wood Working Machinery

Patents
This page contains information on patents issued to this manufacturer.

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USPTO = U.S. Patent Office . Images of the actual patent can be viewed on the U.S. Patent Office web site but a special TIFF viewer must be installed with your browser in order properly work. More information on how to configure your computer to view these patents can be found at TIFF image Viewers for Patent Images.
DATAMP = Directory of American Tool And Machinery Patents . A sister site to VintageMachinery.org with information on patents related to machinery and tools. A much easier user interface than the USPTO's for finding information on machinery patents.

Patent Number Date Title Name City Description
1,528,536 Mar. 03, 1925 Woodworking machinery Raymond E. De Walt Bridgeton, NJ This is the original patent for the radial arm saw, which the inventor marketed as the "DeWalt Wonder-Worker". Patent 1,528,535 covers the yoke for the radial arm saw.
1,528,535 Mar. 03, 1925 Tool holder Raymond E. De Walt Bridgeton, NJ Yoke for radial arm saw
This patent is a companion to patent 1,528,536, which is the main patent for the De Walt radial arm saw—the original radial arm saw.
1,683,763 Sep. 11, 1928 Drill or mortising machine Raymond E. De Walt Leola, PA We have seen one example of this machine, labeled "Built by DeWalt Product Company, Leola, Penna. Lancaster Co. Patents Pending".
1,701,912 Feb. 12, 1929 Woodworking machinery Raymond E. De Walt Leola, PA
1,738,763 Dec. 10, 1929 Woodworking machine Raymond E. De Walt Leola, PA This patent is an improvement on patent 1,528,536: "The object of the present invention is to provide a more efficient angular adjustment in which the parts are held in place by a cam locking bolt."
The assignee later changed the spelling from "De Walt" to "DeWalt". The assignee is described as, "a copartnership consisting of Isaac Lichty Rutt and Clarence Paul Gardner."
1,738,873 Dec. 10, 1929 Floor-sanding machine Raymond E. De Walt Leola, PA
1,738,791 Dec. 10, 1929 Level Gale R. Ober Chagrin Falls, OH
1,794,836 Mar. 03, 1931 Woodworking machine Raymond Elmer De Walt Leola, PA
1,813,568 Jul. 07, 1931 Adjustable machine head Raymond E. De Walt Leola, PA
1,815,037 Jul. 21, 1931 Sawing machine Raymond E. De Walt Leola, PA
1,854,510 Apr. 19, 1932 Portable power driven saw Joseph F. Haas Forest Park, IL
1,888,679 Nov. 22, 1932 Safety device for cutting machines Walter Knapp Lancaster, PA
2,022,288 Nov. 26, 1935 Tool holder Walter Knapp Lancaster, PA Other designs from this inventor were assigned to DeWalt Products Corp., but not this one. Nonetheless, this patent number has been seen on a DeWalt Model FB radial arm saw.
2,022,289 Nov. 26, 1935 Tool holder Walter Knapp Lancaster, PA Other designs from this inventor were assigned to DeWalt Products Corp., but not this one. Nonetheless, this patent number has been seen on a DeWalt Model FB radial arm saw.
2,185,304 Jan. 02, 1940 Reciprocatory carriage structure Walter Knapp Manheim Township, PA
2,257,459 Sep. 30, 1941 Attachment for power saws Wallace W. Gardner Lancaster, PA
2,289,259 Jul. 07, 1942 Carriage for cutting or sawing machines Ewald Schutz Lancaster, PA This patent number has been seen on DeWalt's MM B18 8-inch radial arm saw, and on the heavier-duty Model GE.
    Carriage for cutting or sawing machines Wallace W. Gardner Lancaster, PA  
2,297,882 Oct. 06, 1942 Carriage for cutting or sawing machines Wallace W. Gardner Lancaster, PA
    Carriage for cutting or sawing machines Ewald Schutz Lancaster, PA  
2,329,345 Sep. 14, 1943 Saw table Wallace W. Gardner Lancaster, PA This patent number has been seen on DeWalt's MM B18 8-inch radial arm saw, and on the heavier-duty Model GE.
2,329,357 Sep. 14, 1943 Cutting machine Wallace W. Gardner Lancaster, PA This patent number has been seen on DeWalt's MM B18 8-inch radial arm saw, and on the heavier-duty Model GE.
    Cutting machine Jesse R. Mowery Jr. Lancaster, PA  
2,340,953 Feb. 08, 1944 Cutting or sawing machine Wallace W. Gardner Lancaster, PA
2,353,088 Jul. 04, 1944 Cutting machine Ewald Schutz Lancaster, PA This patent is interesting because it is for a moving-arm radial arm saw. DeWalt originated the design where the motor is attached to a moving carriage that travels on a fixed arm. Others, presumably to evade Ray De Walt's patents, created a different design, where the motor is affixed to the end of the arm, and that entire assembly reciprocates. The latter design has the advantage that the arm moves out of the way when the saw is pushed back, but it has two disadvantages: it is more difficult to make the saw move easily yet precisely, and the arm projects quite a distance from the rear of the table. This last disadvantage is nearly fatal, and makes these saws very difficult to accommodate. They cannot go against a wall unless a hole is cut for the arm, and if they are placed away from the wall where people can walk behind the saw, then the moving arm is a safety hazard. DeWalt did produce this saw, but it was not very successful.
Besides several DeWalt-badged examples of this design, we have also seen one labeled, "Victory Motors, Incorporated". Inventor Ewald Schutz had worked for DeWalt since at least 1939 so it seems very unlikely that Victory Motors was a firm acquired by DeWalt. Our best guess is that Victory Motors was a small and short-lived company that produced this saw as part of the war effort, probably for military use.
2,353,590 Jul. 11, 1944 Cutting machine Ewald Schutz Lancaster, PA "This invention relates to cutting machines, and it is particularly applicable to machines for cutting pieces from stock that is in the form of rods, tubes, etc."
2,366,512 Jan. 02, 1945 Protractor means for cutting or sawing machines Wallace W. Gardner Lancaster, PA
2,562,396 Jul. 31, 1951 Safety device for saws Ewald Schutz Lancaster, PA
2,611,398 Sep. 23, 1952 Wood sawing and cutting machine Ewald Schutz Lancaster, PA This is a reciprocating-arm radial arm saw, and is an improvement on patent 2,353,088.
2,623,554 Dec. 30, 1952 Cutter guard for woodworking machines Ewald Schutz Lancaster, PA
2,700,115 Jan. 18, 1955 Air-cooled electric motor Jesse R. Mowery Jr. Lancaster, PA
2,722,952 Nov. 08, 1955 Jointed radial arm mounting for cutting tool Charles W. Snyder Lancaster, PA This is a turret-arm radial arm saw, a type of design that was patented in 1944 by Red Star Products, Inc. (see patent 2,343,575.)
2,759,502 Aug. 21, 1956 Carriage lock for cutting or sawing machines Samuel S. Auchincloss Marietta, PA
2,781,067 Feb. 12, 1957 Safety device for rotary cutters Robert C. Kaley Landisville, PA
2,785,710 Mar. 19, 1957 Automatic brake for power tools Jesse R. Mowery Jr. Lancaster, PA
2,785,716 Mar. 19, 1957 Safety guard for rotary power tool Joseph B. Lutton Lancaster, PA
2,806,491 Sep. 17, 1957 Combination adjustment and locking device for a jointed supporting arm for a power tool Robert C. Kaley Landisville, PA This invention gives improvements to patent 2,722,952, and is for a mechanism to lock the arm angle adjustments.
2,823,711 Feb. 18, 1958 Adjustable splitter blade assembly for saws Robert C. Kaley Landisville, PA This invention gives improvements to patent 1,888,679.
2,833,320 May. 06, 1958 Wide board saw apparatus Richard C. Bennett Laceyville, PA This just might be the first vertical panel saw; such a machine became necessary once plywood and other sheet material became commonplace. (See, however, patent 2,347,359, which was intended for making panels out of hardwood strips but which contains the idea of a vertical panel saw.) Bennett's design was manufactured by the inventor's own company, then by DeWalt, which had just been purchased by Black & Deck. Before the sale to DeWalt, Bennett made some improvements to this invention; see patent 2,973,020.
2,854,613 Sep. 30, 1958 Motor control system Jesse R. Mowery Lancaster, PA "This invention relates to motor control systems, and more particularly to improvements in systems in which an alternating current motor is dynamically braked by the application of D. C. to its windings."
D186,423 Oct. 20, 1959 Radial arm tool for sawing, planing or the like Roger Protas Pittsburgh, PA
    Radial arm tool for sawing, planing or the like Anton Parisson Brentwood, PA  
2,926,709 Mar. 01, 1960 Guard for rotary power cutter Robert C. Kaley Landisville, PA This patent number has been seen on both AMF and DeWalt radial arm saws.
2,942,632 Jun. 28, 1960 Locking structure for power tool setting Harold C. Cassey Landisville, PA
606,864 Oct. 18, 1960 Wide board saw apparatus Richard C. Bennett Laceyville, PA See US patent 2,833,320.
2,959,200 Nov. 08, 1960 Tool elevating device Harold C. Cassey Landisville, PA
2,973,020 Feb. 28, 1961 Apparatus for sawing wide boards Richard C. Bennett Laceyville, PA Improvements to the inventor's patent 2,833,320.
2,989,094 Jun. 20, 1961 Adjustable stops and guide bar for power tool Joseph Panavas Detroit, MI
2,989,675 Jun. 20, 1961 Safety brake for power tool George Lowe Lancaster, PA
623,872 Jul. 18, 1961 Apparatus for sawing wide boards Richard C. Bennett Laceyville, PA See US patent 2,973,020.
3,011,112 Nov. 28, 1961 Electric motor braking system Jesse R. Mowery Lancaster, PA "This invention relates to safety devices for wood and metal working equipment. Particularly, it relates to braking an electric motor."
3,022,694 Feb. 27, 1962 Cycled jet cooling mechanism Oscar H. Nuss Lancaster, PA This cooling system was for metal-cutting radial arm saws.
3,038,109 Jun. 05, 1962 Braking systems for electrical motors Christian B. Zimmerman Lancaster, PA
    Braking systems for electrical motors Jesse R. Mowery Jr. Lancaster, PA  
3,068,919 Dec. 18, 1962 Shaper guard for radial saw machine Robert C. Kaley Landisville, PA
3,080,897 Mar. 12, 1963 Saber saw attachment for radial saw machine Donovan L. Winter Lancaster, PA
3,213,908 Oct. 26, 1965 Work hold-down for power-operated panel saw Ewald Schutz Lancaster, PA Invention is a "resiliently-mounted work hold-down device which steadies the panel and prevents it from vibrating during the cutting operation."
    Work hold-down for power-operated panel saw Harold C. Cassey Landisville, PA  
3,294,129 Dec. 27, 1966 Radial arm saw machine Ewald Schutz Lancaster, PA "The present invention relates to a radial arm saw machine, and more particularly, to a compact low-cost radial arm saw machine, one which may be manufactured easily and economically..."
    Radial arm saw machine Samuel H. Kohler Lancaster, PA  
3,295,568 Jan. 03, 1967 Uni-directional indexing means for power-operated machine Harold C. Cassey Manheim, PA