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Publication numberUS2426817 A
Publication typeGrant
Publication dateSep 2, 1947
Filing dateJan 19, 1945
Priority dateJan 19, 1945
Publication numberUS 2426817 A, US 2426817A, US-A-2426817, US2426817 A, US2426817A
InventorsCharles F Charlton, Jr Mark A Palmer
Original AssigneeCharles F Charlton, Jr Mark A Palmer
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Cooling system for machine tools
US 2426817 A
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Description  (OCR text may contain errors)

P 1947. cPF. CHARLTON ET AL p 2 ,8

' COOLING SYSTEM FOR MACHINE TOOLS Filed Jan. 19, 1945 Patented'sept. 2, 1947 I UNITED STATES PATENT OFFICE COOLING SYSTEM FOR MACHINE TOOLS Charles F. Charlton and Mark A. Palmer, J12,

' Manchester, Conn;

Application January 19, 1945, Serial No. 573,608

1 Claim. (01. 51 267) This invention relates to a novel and superior cooling system for machine tools, such as grinding machines, milling machines, etc. The grinding or cutting contact of such tools with the Work generates a considerable amount of heat and a circulatin flow of cooling liquid is commonly provided over the tool and work for the purpose of keeping the temperature reduced to a safe maximum. It is desirable that foreign particles shall be separated from the spent liquid before it is again returned to the work and that the liquid shall be maintained below a predetermined maximum temperature.

In machines heretofore employed the spent liquid has been returned to a settling tank where the solids are precipitated and the liquid cooled before the latter is again returned to the work. This system of maintaining the liquid at predetermined temperature has proven inefficient due to the accumulation of solids on the refrigerating plates employed in the tank. Our invention contemplates the elimination of this difiiculty by first separating the solids from the spent liquid by precipitation or otherwise and thereafter bringing the liquid to and maintaining it at the desired temperature by passing it through an enclosed channel including a, refrigerating medium on its way back to the work. The production of such an improved method of circulatin cooling liquid to machine tools and providing such liquid in clean and predetermined temperature condition to the work therein comprises the primary object of the invention.

The work operated on by grinding machines is required to be finished to a small tolerance and unless the work is kept at substantially uniform temperature during the grinding operation its expansion and contraction prevents the maintaining of such tolerance. In apparatus heretofore employed the temperature of the cooling liquid has varied as much as 15 and has been particularly affected by the gathering of sediment to a considerable thickness on the cooling system, thereby forming an insulation rendering the cooling effect very inefficient. We have discovered that by first removing the sediment and solids from the liquid and thereafter passing the clean liquid to the Work through an enclosed channel including a refrigerating unit maintained at predetermined temperature we are able to keep the work at a plus or minus temperature within two degrees. The novel method resulting in this increased efliciency comprises an important object of our invention.

These and other features of the invention will be best understoodand appreciated from the following description of a preferred embodiment thereof selected for purposes of illustration and shown in the accompanying drawing in which the one figure in the drawing is an elevation, partly broken away, of a machine embodying our invention.

In the drawing we have illustrated a grinding machine it including a grinding wheel l2. A liquid coolant is conducted to the wheel and work from a nozzle I in communication with a pipe it, the flow bein controlled by a valve l8. A coolant reservoir 23 is provided beneath the grinding wheel to receive the spent coolant. It is desirable that foreign particles, particularly including those picked up from the work, should be removed before the coolant is returned to the tool and for this purpose we have illustrated the reservoir as divided into a plurality of compartments 22, 23 and 24. The spent coolant flows from the tool into the first compartment 22 Where most of the particles settle before the coolant flows over the baffle 25 into the compartment 23. Further settling of any remaining particles takes place in compartment 23 before the coolant flows over the baffle 26 into the compartment 24. The resulting relatively clean coolant is circulated from the compartment 24 back to the tool.

Efficient operation requires that the temperature of the coolant shall be at or below a predetermined maximum when it reaches the tool and work and the primary object of our invention resides in an improved method for elliciently maintaining such temperature within predetermined limits. To this end we pass the clean coolant from the compartment 2:3 through a refrigerating path on its return to the tool. As illustrated in the drawing, this path includes a plurality of pipes or tubes 28 surrounded by a refrigerating medium of predetermined capacity and temperature within a cylindrical heat exchanger 3B.

Mounted on the reservoir is a pump 32 operated by a motor 36 and arranged to pump thecoolant from the compartment 24 through pipes 38, 38, V

28 and Hi to the nozzle It. An economizer In is preferably employed in connection with the refrigerating system. A compressor (not illustrated) maintains a suction on the line 42 which passes in the form o f-a coil 44 back to the chamber 39 at 46. The vapor thus drawn from the chamher is compressed to a liquid and returned through a pipe 48 to and through a coil 48 within the pipe of coil 4d and from thence through a pipe 50 to the bottom of the chamber 30. A thermoworking operations thereon, which consists in static expansion valve is provided at 52 and is conducting spent cooling liquid from the work connected by a tube 54 to a controlling expansion to a separating chamber, separating the detritus bulb at 56 whereby automatically to maintain a solids from the liquid in the separating chamber, predetermined temperature within the chamber 5 conducting the separated liquid through a refrig- 30. The passage of the liquidrefrigerant through erating device maintained at a constant and the relatively cooler vapor refrigerant within the definite temperature thereby cooling the sepcoils substantially. cools the reirigerar trliquigi to arated liquid; to;. a predetermined temperature, the requireddegre Orbits return {cathechamber and discharging said; liquid 7 at; said predeter- 30. A refrigerant liquid level is maintained in 10 mined temperature onto the work.

the chamber 30 substantially as indicated at 58;; CHARLES F. CHARLTON. It will be apparent that the coolant is cooled MARK A. PALMER, JR.

with maximum efficiency as it passes-throughthe several pipes 28 on its return from the .com, 7 REFERENCES CITED Partment 24 t0 the 1 a it Wi l be furthgrrhgl'e 15;, Thejollowing references are of record in the apparent that the cooling system is adaptedto file of this patent:

operate and continue to operate with maximum-- efficiency on the coolant which is substan ially v UNITED STATES PATENTS freed from foreign particles before being cir-' Number Name Date culated through the refrigerating path, 9 ,7 MiSkOlCZY ----r---- p 02 Having'thus disclosed our invention what, we 2,132,952 Todd etal. Dec.- 12, 1939 claim as new and desire to secureby Letters e et a Patent oi the United States is: 403,030; Bauer May '7; 1889 A method of producing work-to closetolerances 1,455,187 Brown May 15, 1923 in a machine tool by maintaining a predetermined 25 1,938 ,8'75 1 Stratton Dec. 12,- 1933 constant temperature in the-workpiece during

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US375821 *Jan 3, 1888The Speingfield Glue And Emeey Wheel companySetts
US403030 *Jan 29, 1887May 7, 1889 Water-tank of grinding-machines
US698126 *Jun 1, 1901Apr 22, 1902Misko Cutlery CompanyGrinding or polishing metals.
US1455187 *Mar 31, 1921May 15, 1923Norton CoGrinding-fluid-circulating system
US1938875 *May 11, 1931Dec 12, 1933Diamond Machine CoCoolant supply for machine tools
US2182952 *Apr 30, 1938Dec 12, 1939Hanson Van Winkle Munning CoAir conditioned buffing and polishing system
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2705005 *Jul 23, 1953Mar 29, 1955Tuorto Herbert JApparatus for cutting ceramics
US2742974 *Mar 23, 1953Apr 24, 1956Trion IncMethod and apparatus for cleaning air or gas laden with oil mists
US3069950 *Jan 23, 1958Dec 25, 1962Ty Sa Man Machine CompanyHigh speed friction saw having liquid cooling means
US3240026 *May 13, 1963Mar 15, 1966Swift & CoPoultry chilling
US3272285 *Jun 11, 1963Sep 13, 1966Auto Research CorpPump unit for a central lubricating installation
US3394813 *Sep 30, 1966Jul 30, 1968Fram CorpDe-icing and ice prevention in filters
US4197678 *Jul 12, 1978Apr 15, 1980Guy RollCoolant separator
US4261181 *Nov 5, 1979Apr 14, 1981Hofstetter Robert WConveyor system with cooling means
US4348864 *Apr 17, 1980Sep 14, 1982Kabushiki Kaisha Komatsu SeisakushoTank assembly for hydraulic system
US4354357 *Apr 8, 1981Oct 19, 1982Hofstetter Robert WConveyor system with cooling means
US4522242 *Sep 30, 1982Jun 11, 1985Hutson James HenryHydraulic fed log debarker
US5085188 *Dec 3, 1990Feb 4, 1992Allied-Signal Inc.Modular lubrication/filter system
US5217605 *Sep 20, 1991Jun 8, 1993Kottke Gordon VPortable multi-element electric discharge machine filter system
US5380446 *Oct 4, 1993Jan 10, 1995Bratten; Jack R.Method for filtration of machine tool coolant
US5961376 *Jan 16, 1998Oct 5, 1999Wernicke & Co. GmbhMethod of increasing the service life of grinding wheels
US6247480 *Jun 18, 1999Jun 19, 2001Ez Environmental Solutions CorporationPressure washer containment assembly and method with a passive skimmer
US6569003 *Jul 27, 2001May 27, 2003Michael D. HarlanCoolant apparatus for a chainsaw sharpener
US7658196Apr 25, 2007Feb 9, 2010Ethicon Endo-Surgery, Inc.System and method for determining implanted device orientation
US7775215Mar 7, 2006Aug 17, 2010Ethicon Endo-Surgery, Inc.System and method for determining implanted device positioning and obtaining pressure data
US7775966Mar 7, 2006Aug 17, 2010Ethicon Endo-Surgery, Inc.Non-invasive pressure measurement in a fluid adjustable restrictive device
US7844342Feb 7, 2008Nov 30, 2010Ethicon Endo-Surgery, Inc.Powering implantable restriction systems using light
US7927270Jan 29, 2007Apr 19, 2011Ethicon Endo-Surgery, Inc.External mechanical pressure sensor for gastric band pressure measurements
US8016744Mar 7, 2006Sep 13, 2011Ethicon Endo-Surgery, Inc.External pressure-based gastric band adjustment system and method
US8016745Apr 6, 2006Sep 13, 2011Ethicon Endo-Surgery, Inc.Monitoring of a food intake restriction device
US8034065Feb 26, 2008Oct 11, 2011Ethicon Endo-Surgery, Inc.Controlling pressure in adjustable restriction devices
US8057492Feb 12, 2008Nov 15, 2011Ethicon Endo-Surgery, Inc.Automatically adjusting band system with MEMS pump
US8066629Feb 12, 2007Nov 29, 2011Ethicon Endo-Surgery, Inc.Apparatus for adjustment and sensing of gastric band pressure
US8100870Dec 14, 2007Jan 24, 2012Ethicon Endo-Surgery, Inc.Adjustable height gastric restriction devices and methods
US8114345Feb 8, 2008Feb 14, 2012Ethicon Endo-Surgery, Inc.System and method of sterilizing an implantable medical device
US8142452Dec 27, 2007Mar 27, 2012Ethicon Endo-Surgery, Inc.Controlling pressure in adjustable restriction devices
US8152710Feb 28, 2008Apr 10, 2012Ethicon Endo-Surgery, Inc.Physiological parameter analysis for an implantable restriction device and a data logger
US8187162Mar 6, 2008May 29, 2012Ethicon Endo-Surgery, Inc.Reorientation port
US8187163Dec 10, 2007May 29, 2012Ethicon Endo-Surgery, Inc.Methods for implanting a gastric restriction device
US8192350Jan 28, 2008Jun 5, 2012Ethicon Endo-Surgery, Inc.Methods and devices for measuring impedance in a gastric restriction system
US8221439Feb 7, 2008Jul 17, 2012Ethicon Endo-Surgery, Inc.Powering implantable restriction systems using kinetic motion
US8233995Mar 6, 2008Jul 31, 2012Ethicon Endo-Surgery, Inc.System and method of aligning an implantable antenna
US8337389Jan 28, 2008Dec 25, 2012Ethicon Endo-Surgery, Inc.Methods and devices for diagnosing performance of a gastric restriction system
US8377079Dec 27, 2007Feb 19, 2013Ethicon Endo-Surgery, Inc.Constant force mechanisms for regulating restriction devices
US8591395Jan 28, 2008Nov 26, 2013Ethicon Endo-Surgery, Inc.Gastric restriction device data handling devices and methods
US8591532Feb 12, 2008Nov 26, 2013Ethicon Endo-Sugery, Inc.Automatically adjusting band system
US20120055458 *Aug 26, 2011Mar 8, 2012Rexon Industrial Corp., Ltd.Cutting device with a liquid level display
EP0226206A2 *Dec 16, 1986Jun 24, 1987Kitamura Machinery Co.,Ltd.Cutting oil sorting apparatus
EP1348518A2 *Mar 27, 2003Oct 1, 2003Nidek Co., Ltd.Grinding water tank apparatus, and eyeglass lens machining apparatus having the same
WO1984001322A1 *Sep 30, 1983Apr 12, 1984Hutson James HenryHydraulic fed log debarker
Classifications
U.S. Classification451/53, 134/111, 62/DIG.100, 184/6.24, 451/450, 210/167.6, 29/DIG.770, 29/DIG.880, 62/64, 210/181, 134/108
International ClassificationB23Q11/14, B23Q11/10, B24B55/02
Cooperative ClassificationB24B55/02, Y10S29/077, B23Q11/10, B23Q11/141, Y10S62/10, Y10S29/088, B23Q11/146
European ClassificationB24B55/02, B23Q11/14A, B23Q11/14H, B23Q11/10