Manufacturers Index - Thompson Grinder Co.
Thompson Grinder Co.
Springfield, OH; Dayton, OH, U.S.A.
Manufacturer Class:
Metal Working Machinery
This page contains information on patents issued to this manufacturer.
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1,978,181
|
Oct. 23, 1934
|
Hydraulically driven surface grinding machine
|
Joseph R. Whittles |
Rockford, IL |
|
2,068,529
|
Jan. 19, 1937
|
Grinding Machine
|
William G. Baldenhofer |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate, and also on a Brown & Sharpe patent plate.
Abstract:
This invention relates to improvements in grinding machines of the class known as surface grinding machines, and more particularly to that class in which the work-holder and tool-holder are reciprocally operated by fluid motors, the fluid preferably being a mineral oil under pressure. In machines of this class the work-holder is reciprocated by means of a fluid motor consisting of a cylinder, piston and piston rod. The toolhead is usually advanced or retracted in successive intermittent movements of varying extent by a similar motor, the intermittent movements being timed to occur at the ends of the working strokes of the work-holder. The grinding operation is performed on the work supported on the work-holder by peripheral contact of a rotatable grinding wheel, which is mounted on the outer end of a wheel spindle supported in a horizontally disposed toolhead in such manner that the longitudinal axis of the spindle is located at right-angles to the direction of travel of the work- holder, whereby a flat surface is produced on the work by feeding the wheel across the work in successively intermittent movements. The machine described in the present specification follows a customary practice in providing reversing mechanism which is operated by stop- dogs adjustably secured to the work-holder, this mechanism governing the reversals of the work- holder, and also by the provision whereby the fluid under pressure is supplied to the separate fluid motors from a common source. In the present machine the intermittent feed imparted to the toolholder is obtained by supplying successive predetermined quantities of fluid to the same end of the cylinder of the toolholder motor, and both the toolholder motor and the work-holder motor are supplied from the same source of fluid under pressure. One of the disadvantages of such an arrangement has been that due to varying fluid pressures when the speed of the work-holder is changed, successive charges of fluid of a different quantity will be 1admitted to the toolholder motor resulting in a change in the extent of the intermittent feeds of the toolholder. If the speed of the work-holder motor is decreased, the successive intermittent movements of the toolholder become greater, and 5if the speed of the work-holder motor is increased the extent of the successive feeds of the toolholder is reduced. As a consequence of this, unless provision is made otherwise for preventing it, the quantity of the successive fluid charges admitted to the toolholder motor will obviously vary at different speeds of the work-holder resulting in a variation in the feed of the toolholder. One of the objects of this invention is to overcome this objection by providing that uniform successive charges of fluid will be admitted to the toolholder motor regardless of the speed of the work-holder. Another object of the invention is the provision of means incorporated in a unitary hydraulic valve control mechanism, whereby a smoothly operating machine is afforded. One of the advantages of fluid motor drive is that infinite gradation of work-holder speeds is readily obtainable. Ordinarily, however, the operation is hampered by vibration due to shock at work-holder reversals. The present invention provides a cushioning effect whereby all shock is eliminated. Another object is the provision of improved means for controlling the extent of each intermittent movement of the tool-head, which means may also be employed to alter the direction of movement of the toolholder. Another object is to provide means acting in combination with the devices just mentioned which control the toolhead movements whereby a continuous movement may be given the toolhead in either direction, the direction being under the control of the intermittent control means. Another object is to provide that the toolhead is maintained in position during the intervals between times of movement; that is, the toolhead is substantially in a "locked" position.
Claim:
In a machine of the character described, a plurality of fluid motors operating from the same source of fluid supply, manual means for regulating the fluid supplied to one of said motors, and fluid admission means operated directly by fluid for admitting successive predetermined charges of the fluid to another of said motors also operable from the same source of fluid supply. |
2,113,287
|
Apr. 05, 1938
|
Machine for Grinding and Sharpening Broaches
|
William G. Baldenhofer |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,131,151
|
Sep. 27, 1938
|
Grinding machines
|
Herbert F. Smith |
Springfield, OH |
This patent number was seen on a surface grinder from Thompson Grinder Co. |
2,138,811
|
Dec. 06, 1938
|
Surface Hardening Lathe Bed
|
Philber A. Abe |
Sidney, Shelby County, OH |
Toulmin & Toulmin - patent attorneys
My invention relates to a new article of manufacture for use as a lathe bed, and a process of producing it. It is my object to produce a lathe bed, which can be cast and machined, and thereafter be surface hardened. It is a further object to provide a novel alloy susceptible to the heat treatment and hardening process of this invention. It is my object to provide a type of material for use in lathe beds which can be surface hardened.
This patent number was seen on Cincinnati Milling Machine Co. and Thompson Grinder Co. patent plates. |
2,154,947
|
Apr. 18, 1939
|
Hardening Metal Surfaces
|
Arthur H. Lloyd |
, England |
Application in Great Britain, 20 Jun 1936.
This patent number was seen on Cincinnati Milling Machine Co. and Thompson Grinder Co. patent plates. |
|
|
Hardening Metal Surfaces
|
Herbert H. Beeny |
, England |
|
2,157,948
|
May. 09, 1939
|
Hardening of Metal Surfaces
|
Herbert H. Beeny |
, England |
Dyke, Calver & Gray - patent attorneys
This patent number was seen on Cincinnati Milling Machine Co. and Thompson Grinder Co. patent plates.
This invention relates to the treatment of ferrous surfaces such as are capable of being hardened by being locally heated by means of a burner to a high temperature and then immediately cooled. The flame is progressively applied to the surface at a predetermined rate, the arrangement being such that there is not sufficient time for the heat to be conducted away to the interior of the article before the surface of the latter is quenched. The specification accompanying the co-pending patent application of myself and Arthur H. Lloyd, Serial No. 148,752 describes a particularly satisfactory burner and cooler for treating a ferrous (for example, a cast-iron) surface in this way, and also an unproved form of burner. It is now found that in treating the surface of a cast-iron V-rail in this way there is a tendency for cracks to form along the apex of the rail. This is probably due to the fact of the flames, acting on the flanks of the rail, heating the apex of the rail to too great an extent, this resulting in the apex of the rail being hardened to a greater depth than the flanks of the rail. When a V-rail is to be used as an inverted-V-rail for supporting a machine-tool slide, it is unnecessary for its apex to be hardened as the load is taken by the flanks of the rail. The present invention is concerned with the surface-hardening of the operative face of a V-rail, to be used for supporting a machine-tool slide or some other slide, by flame-heating the flanks of the rail and immediately thereafter cooling them, as specified above; and it involves means acting to prevent the apex of the rail from being hardened in this manner so that the hardened flanks of the rail will be separated from one another by a relatively soft surface along the apex of the rail. Preferably the said means includes a jet of water or other cooling medium arranged to impinge on the apex of the rail in the vicinity of where the flanks are being flame heated, the said jet preferably being directed backwardly. Conveniently the cooling medium from this jet is delivered at a higher pressure than that from the main jets.
|
2,216,308
|
Oct. 01, 1940
|
Method and Means for Balancing Grinding Wheels
|
Edwin C. Ballman |
St. Louis, MO |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,216,800
|
Oct. 08, 1940
|
Hydraulic Control Device
|
William G. Baldenhofer |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,231,233
|
Feb. 11, 1941
|
Process of finishing materials
|
Henry Vienhaus |
Springfield, OH |
This patent number was listed on a Thompson Grinder Co. machine plaque. |
2,252,877
|
Aug. 19, 1941
|
Way Grinding Machine
|
Christian Baldenhofer |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,294,492
|
Sep. 01, 1942
|
Dresser Attachment for Grinding Machines
|
John C. Wilson |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,294,493
|
Sep. 01, 1942
|
Apparatus for Wheel Dressing
|
John C. Wilson |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,294,494
|
Sep. 01, 1942
|
Grinding Wheel Dresser
|
John C. Wilson |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,315,104
|
Mar. 30, 1943
|
Inclinable grinder spindle
|
William G. Baldenhofer |
Springfield, OH |
This patent number was listed on a Thompson Grinder Co. machine plaque. |
2,321,442
|
Jun. 08, 1943
|
Collapsible antifriction nut
|
John Clifford Wilson |
Springfield, OH |
|
2,325,296
|
Jul. 27, 1943
|
Lubricant Seal for Shafts
|
William G. Baldenhofer |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,334,238
|
Nov. 16, 1943
|
Surface Grinder Spindle Bearing
|
William G. Baldenhofer |
Springfield, Clark County, OH |
Original application 22 Dec., 1941. Divided and this application 03 Aug., 1942.
This patent was listed on a Thompson Grinder Co. patent plate. |
2,335,625
|
Nov. 30, 1943
|
Grinding Machine
|
John C. Wilson |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
D137,121
|
Jan. 25, 1944
|
Design for a grinding machine
|
John C. Wilson |
Springfield, OH |
|
2,349,602
|
May. 23, 1944
|
Hydraulic System for Plural Machine Tools
|
William G. Baldenhofer |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,363,039
|
Nov. 21, 1944
|
Surface Grinder with Auxiliary Spindles
|
William G. Baldenhofer |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,378,903
|
Jun. 26, 1945
|
Grinding Machine
|
William G. Baldenhofer |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,384,225
|
Sep. 04, 1945
|
Method and Apparatus for Maintaining Uniform Temperature of Diverse Fluids in a Machine Tool
|
John C. Wilson |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,384,589
|
Sep. 11, 1945
|
Bearing for Rotary Spindles
|
William G. Baldenhofer |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,384,590
|
Sep. 11, 1945
|
Lubrication System for Machine Tools
|
William G. Baldenhofer |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,391,375
|
Dec. 18, 1945
|
Spindle shaft with intermediate ball bearing
|
John Clifford Wilson |
Springfield, OH |
|
2,396,147
|
Mar. 05, 1946
|
Cooling System for Hydraulically-Operated Machine Tools
|
William G. Baldenhofer |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,398,268
|
Apr. 09, 1946
|
Machine Tool
|
John C. Wilson |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,415,324
|
Feb. 04, 1947
|
Method of Re-Journaling Spindle Shafts
|
John C. Wilson |
Springfield, Clark County, OH |
Original application 11 Nov, 1945. Divided and this application 02 Sept, 1944.
This patent was listed on a Thompson Grinder Co. patent plate. |
2,424,347
|
Jul. 22, 1947
|
Machine Tool for Cutting Surfaces of Irregular Shape
|
John C. Wilson |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,426,807
|
Sep. 02, 1947
|
Apparatus for Shaping Workpieces by Grinding
|
John C. Wilson |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,436,466
|
Feb. 24, 1948
|
Method and Apparatus for Grinding and Lapping
|
John C. Wilson |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,438,239
|
Mar. 23, 1948
|
Ball Grinding Machine
|
Harry A. Toulmin Jr. |
Dayton, Montgomery County, OH |
|
2,456,762
|
Dec. 21, 1948
|
Apparatus for Crush Dressing Grinding Wheels
|
John C. Wilson |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,457,383
|
Dec. 28, 1948
|
Apparatus for grinding
|
Frederick G. Krafft |
Springfield, OH |
This patent covers "an improved process and mechanism for the production of thread rolling dies." |
2,473,670
|
Jun. 21, 1949
|
Grinding Machine
|
John C. Wilson |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,482,302
|
Sep. 20, 1949
|
Filtering System
|
Otto M. Summers |
Glasgow, Barren County, KY |
|
2,495,492
|
Jan. 24, 1950
|
Apparatus for Crush Dressing Grinding Wheels
|
John C. Wilson |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,503,646
|
Apr. 11, 1950
|
Apparatus for Dressing a Grinding Wheel to a Predetermined Configuration
|
John C. Wilson |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,518,835
|
Aug. 15, 1950
|
Filter system
|
Otto Murray Summers |
Glasgow, KY |
This coolant/lubricant filtration system is intended for grinders, which produce lots of very small particles. |
2,534,941
|
Dec. 19, 1950
|
Method and apparatus for grinding
|
William G. Baldenhofer |
Springfield, OH |
This machine can grind workpieces with short, deep recesses to be ground. |
2,535,183
|
Dec. 26, 1950
|
Grinding Wheel Dressing Apparatus
|
John C. Wilson |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,535,184
|
Dec. 26, 1950
|
Method and Apparatus for Supplying Coolant to Grinding Wheels
|
John C. Wilson |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,554,079
|
May. 22, 1951
|
Method and Apparatus for Continuous Form Grinding
|
John C. Wilson |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,561,004
|
Jul. 17, 1951
|
Method and Apparatus for Grinding
|
John C. Wilson |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
|
|
Method and Apparatus for Grinding
|
William G. Baldenhofer |
Springfield, Clark County, OH |
|
2,560,654
|
Jul. 17, 1951
|
Device for Dressing Grinding Wheels
|
Floryan Lohutko |
Detroit, Wayne County, MI |
|
2,560,967
|
Jul. 17, 1951
|
Apparatus for Grinding Gears and Gear Cutters
|
Floryan Lohutko |
Detroit, Wayne County, MI |
|
658,306
|
Oct. 03, 1951
|
Improvements in and relating to grinding machines and method of shaping grinding wheels
|
John Clifford Wilson |
Springfield, OH |
|
2,576,201
|
Nov. 27, 1951
|
Grinding Method and Machine
|
John C. Wilson |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
663,227
|
Dec. 19, 1951
|
Improvements in and relating to a method of and a device for grinding
|
John Clifford Wilson |
Springfield, OH |
|
2,585,990
|
Feb. 19, 1952
|
Method of grinding intricate contours
|
William G. Baldenhofer |
Springfield, OH |
|
2,586,235
|
Feb. 19, 1952
|
Device for Forming Grinding Wheels
|
Frederich G. Krafft |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,586,755
|
Feb. 19, 1952
|
Method and Apparatus for Grinding
|
John C. Wilson |
Springfield, Clark County, OH |
|
2,589,620
|
Mar. 18, 1952
|
Apparatus for Cleaning, Dressing, and Grinding Wheels
|
Guy H. Leffel |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,595,591
|
May. 06, 1952
|
Apparatus for Grinding Helical Gears
|
Floryan Lohutko |
Detroit, Wayne County, MI |
|
2,600,746
|
Jun. 17, 1952
|
Fluid Pressure Control Valve
|
Walter Ernst |
Dayton, Montgomery County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,602,436
|
Jul. 08, 1952
|
Apparatus for dressing grinding wheels
|
Floryan Lohutko |
Detroit, MI |
This apparatus is intended for dressing grinding wheels for final finishing of screw threads. |
2,606,571
|
Aug. 12, 1952
|
Multipurpose control valve
|
Walter Ernst |
Dayton, OH |
|
2,612,015
|
Sep. 30, 1952
|
Mounting Structure for Grinding Wheels
|
Frederich G. Krafft |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,612,114
|
Sep. 30, 1952
|
Vane Pump or Motor
|
Walter Ernst |
Dayton, Montgomery County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,612,115
|
Sep. 30, 1952
|
Vane Pump and Vane Therefor
|
Walter Ernst |
Dayton, Montgomery County, OH |
Original application 06 Apr., 1948. Divided and this application 25 Jul., 1949.
This patent was listed on a Thompson Grinder Co. patent plate. |
2,623,333
|
Dec. 30, 1952
|
Apparatus for Grinding
|
William G. Baldenhofer |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,633,678
|
Apr. 07, 1953
|
Machine Tool and Method of Operation
|
Herbert F. Smith |
Springfield, Clark County, OH |
This patent was listed on a Thompson Grinder Co. patent plate. |
2,636,321
|
Apr. 28, 1953
|
Machine tool
|
John Clifford Wilson |
Springfield, OH |
This invention "relates to a grinding machine having a rotary table on which is mounted a plurality of fixtures, such as chucks, for supporting workpieces to be machines." |
495,289
|
Aug. 11, 1953
|
Method of and device for grinding
|
John Clifford Wilson |
Springfield, OH |
This invention relates to the steel profile roll that is used to shape and dress the grinding wheel by crushing the two wheels together while slowly rotating in synchrony. The main innovation is a second "master" roll that is used to true up the profile roll, which can be done without having to remove the profile roll from the machine. |
495,290
|
Aug. 11, 1953
|
Grinding machines and method of shaping grinding wheels
|
John Clifford Wilson |
Springfield, OH |
This patent provides a profile roll that is used to shape and dress the grinding wheel by crushing the two wheels together while slowly rotating in synchrony. The main innovation is a method of avoiding any relative motion of the grinding wheel and profile roll. |
2,682,748
|
Jul. 06, 1954
|
Restrictor Valve for a Servomotor Circuit
|
Walter Ernst |
Dayton, Montgomery County, OH |
Original application 06 Apr., 1951. Divided and this application 12 Apr., 1952.
This patent was listed on a Thompson Grinder Co. patent plate. |
512,794
|
May. 10, 1955
|
Method and apparatus for grinding
|
William G. Baldenhofer |
Springfield, OH |
|
|
|
Method and apparatus for grinding
|
John Clifford Wilson |
Springfield, OH |
|
2,723,505
|
Nov. 15, 1955
|
Method and Apparatus for Surface Finishing
|
Frederick G. Krafft |
Springfield, Clark County, OH |
|
2,730,074
|
Jan. 10, 1956
|
Servo-motor valve
|
Walter Ernst |
Dayton, OH |
|
2,785,511
|
Mar. 19, 1957
|
Grinding Machine and Method of Operation
|
John C. Wilson |
Springfield, Clark County, OH |
|
2,921,439
|
Jan. 19, 1960
|
Pump Control
|
Frederick G. Krafft |
Springfield, Clark County, OH |
|
2,926,653
|
Mar. 01, 1960
|
Grinding machines
|
Frederick G. Krafft |
Springfield, OH |
|
2,932,985
|
Apr. 19, 1960
|
Long Piston Rods and Motor Embodying the Same
|
William G. Baldenhofer |
Springfield, Clark County, OH |
Original application 08 Feb., 1954. Divided and this application 19 Mar., 1956. |
850,425
|
Oct. 05, 1960
|
A hydraulic circuit embodying a combined pump and control unit
|
Walter Ernst |
Dayton, OH |
|
|
|
A hydraulic circuit embodying a combined pump and control unit
|
Frederick G. Krafft |
Springfield, OH |
|
2,985,109
|
May. 23, 1961
|
Hydraulic Pump
|
Walter Ernst |
Dayton, Montgomery County, OH |
|
2,986,852
|
Jun. 06, 1961
|
Grinding machines
|
John Clifford Wilson |
Springfield, OH |
|
628,890
|
Oct. 10, 1961
|
Pump control
|
Walter Ernst |
Dayton, OH |
This invention relates to speed control of a hydraulic motor that keeps its speed constant under varying load. A key design goal was to minimize heating of the hydraulic fluid. |
|
|
Pump control
|
Frederick G. Krafft |
Springfield, OH |
|
3,011,449
|
Dec. 05, 1961
|
Vaned Hydraulic Unit
|
Walter Ernst |
Dayton, Montgomery County, OH |
|
3,015,212
|
Jan. 02, 1962
|
Pump Control
|
Frederick G. Krafft |
Springfield, Clark County, OH |
Original application, 26 Jun 1957, now patent #2,921,439. Divided and this application, 31 Dec 1959. |
|
|
Pump Control
|
Walter Ernst |
Dayton, Montgomery County, OH |
|
3,047,987
|
Aug. 07, 1962
|
Apparatus for Submerged Grinding
|
William G. Baldenhofer |
Springfield, Clark County, OH |
|
|
|
Apparatus for Submerged Grinding
|
Frederick G. Krafft |
Springfield, Clark County, OH |
|
913,197
|
Dec. 19, 1962
|
Improvements in hydraulic systems
|
Walter Ernst |
Dayton, OH |
|
|
|
Improvements in hydraulic systems
|
Frederick Krafft |
Springfield, OH |
|
656,461
|
Jan. 22, 1963
|
Control pump
|
Walter Ernst |
Dayton, OH |
This patent has distinct similarities to patent {CA628,890}. |
|
|
Control pump
|
Frederick G. Krafft |
Springfield, OH |
|
3,083,535
|
Apr. 02, 1963
|
Hydraulic servo system
|
Walter Ernst |
Dayton, OH |
|
|
|
Hydraulic servo system
|
Frederick G. Krafft |
Springfield, OH |
|
3,087,286
|
Apr. 30, 1963
|
Feeding method and apparatus
|
Frederick G. Krafft |
Springfield, OH |
|
1,153,585
|
Aug. 29, 1963
|
Vorrichtung zur regelung hydraulischer antriebe, insbesondere fuer schleifmaschinen, durch radiale verschiebung eines den rotor der pumpe umgebenden ringes
|
Walter Ernst |
Dayton, OH |
|
|
|
Vorrichtung zur regelung hydraulischer antriebe, insbesondere fuer schleifmaschinen, durch radiale verschiebung eines den rotor der pumpe umgebenden ringes
|
Frederick G. Krafft |
Springfield, OH |
|
3,231,320
|
Jan. 25, 1966
|
Hydrostatic Lubrication
|
Frederick Gustave Krafft |
Springfield, Clark County, OH |
|
3,305,974
|
Feb. 28, 1967
|
Grinding Machine
|
John C. Wilson |
Springfield, Clark County, OH |
|
|