US3665363A - Thermostatic control device and system utilizing the same - Google Patents

Thermostatic control device and system utilizing the same Download PDF

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Publication number
US3665363A
US3665363A US79122A US3665363DA US3665363A US 3665363 A US3665363 A US 3665363A US 79122 A US79122 A US 79122A US 3665363D A US3665363D A US 3665363DA US 3665363 A US3665363 A US 3665363A
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United States
Prior art keywords
bimetal member
frame
leg
cam
switch
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Expired - Lifetime
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US79122A
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English (en)
Inventor
David M Rosenberg
Siegfried E Manecke
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Robertshaw Controls Co
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Robertshaw Controls Co
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0202—Switches
    • H05B1/0213—Switches using bimetallic elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/12—Means for adjustment of "on" or "off" operating temperature
    • H01H37/20—Means for adjustment of "on" or "off" operating temperature by varying the position of the thermal element in relation to switch base or casing

Definitions

  • a U-shaped bimetal member defining a pair of legs interconnected at ad- [221 Med: Oct jacent ends thereof by an elbow portion pivotally mounted to [2!] Appl No; 79,122 the frame means.
  • plunger means is movably carried by the frame means and IS disposed between one of the legs of the bimetal member and the switch means to operate the switch [52] US. 353 means in relation to the position of the one leg relative to the [5 Ill- 37/12 frame means.
  • Cam means is movably carried by the frame l l, 347, 349, means and acts on [he othe leg of [ha member to ad- 379 just the pivotal position of the bimetal member and, thus, the temperature setting that the thermostatic device will open the [56] References Cited switch means, the cam means being movable across the longitudinal axis of the other leg of the bimetal member to adjust UNITED STATES PATENTS the same 2,493,294 l/l950 Kronmiller ....337/347 2,786,917' 3/1957 Casey ..337/1 11 Cm WWW FOREIGN PATENTS OR APPLICATIONS 565,252 11/ 1944 Great Britain ..337/360 91 23 39 J58 I 96" 59 28- s6 76 5 45 86-- 2 48 27 47 88- 40 4- 7s- 73 I 49 74 63 77' 6O 56 l I J 8' 79 85 22 8O 35 a4 Patent
  • thermostatic devices have been provided for controlling heating means and the like that is disposedremote from the thermostatic device, the thermostatic device sensing room temperature and causing the heating means for the room or the like to turn on when the temperature of the room falls below a selected temperature as well as causing the heating means to turn off when the room temperature exceeds the selected temperature.
  • Such thermostatic device has an auxiliary heater therein which only operates when the heating means is in its on condition to raise the temperatureat the thermostat to cause the thermostat to turn off the heating means before the temperature in the room exceeds the selected temperature so as to prevent an adverse overshoot situation and thereby provide a narrow temperature difierential in the room or rooms being maintained by such thermostatic means.
  • one embodiment of this invention provides a frame means'carrying electrical switch means.
  • a U-shaped bimetal member that defines a pair of legs interconnected together at adjacent ends thereof by an elbow portion is pivotally mounted by the elbow portion thereof to the frame means.
  • a movable plunger is carried by the framemeans and is disposed between one of the legs of the bimetal member and the switch means to operate the switch means in relation to the position of the one leg relative to the frame means.
  • Cam means is movably carried by the frame means and acts on the other leg of the bimetal member to adjust the pivotal position of the bimetal member and, thus, the temperaturesetting that the thermostatic device will open the switch meansthe cam means being movable across the longitudinal axis of the other leg of the bimetal member ,to adjust the same.
  • Another object of this invention is to provide an improved control system utilizing such a thermostatic device.
  • FIG. 1 is a front view of one embodiment of the thermo static device of this invention.
  • FIG. 2 is an enlarged view of the thermostatic device of FIG. 1 with the cover member thereof removed.
  • FIG. 3 is a reduced fragmentary view of the thermostatic device of FIG. 2 with the selector means and another cover plate thereof removed to illustrate the electrical switch means and terminal means therefor.
  • FIG. 4 is an enlarged cross-sectional view taken on line 4-4 of FIG. 1.
  • FIG. 5 is a cross-sectional view-taken on line 5-5 of FIG. 2.
  • FIG. 6 is a fragmentary rear view of the thermostatic device of FIG. 2.
  • FIG. 7 is an exploded perspective view of certain of the parts of the thermostatic device of FIG. 1.
  • FIG. 8 is a view similar to FIG. 3 and illustrates another thermostatic device of this invention.
  • FIG. 9 is a view similar to FIG. 4 and illustrates the thermostatic device of FIG. 8.
  • FIG. 10 is a fragmentary rear device of FIG. 8.
  • thermostatic device of this invention can be utilized for controlling other devices as desired.
  • the improved thermostatic device of this invention is generally indicated by the reference numeral 20 and comprises a frame means 21 defined by a housing member 22 having a recess23 therein receiving an electrical switch means 24 in a manner hereinafter described and being closed by a removable cover plate 26.
  • the frame means 21 includes a bracket plate 27 secured to the housing member 22 in any suitable manner so as to pivotally carry a selector means 28 pivotally mounted thereto by rivet means 29, the plate 27 having depending L-shaped legs 30 riveted to the housing member 22 so that the cover plate 27 is disposed in spaced relation relative to the previously described cover plate 26.
  • a cover plate 31 is adapted to be disposed against and be secured to the housing member 22 in any suitable manner to cover the plate 27 as illustrated in FIG. 4, the cover means 31 having a slot 32 at one end thereof and through which an outwardly directed tang 33 of the selector means 28 can project so as to be manually grasped to move the selector means 28 relative to the frame means 21 while at the same time indicating a temperature setting as provided by suitable scale means 34 provided on the housing member 22 as illustrated in FIG. 1.
  • thermometer means 35 can be carried by the cover means 31 and have an indicating pointer means 36 viewable in a window means 37 cut in the cover member 31 as illustrated in FIG. 1.
  • the electrical switch means 24 comprises a snap blade 38 having opposed ends 39 and 40 while being medially slotted to define three legs 41, 42 and 43 with the outboard legs 42 and 43 being crimped at 44 to render the blade 38 snap acting in a manner fully disclosed and claimed in applicants [15. Pat. No. 3,238,337.
  • a leaf spring 45 is secured to the end 40 of the blade 38 as well as to the middle leg 41 by fastening means 46 so as to bear against a set screw 47 threadedly disposed in a threaded bore 48 in an end wall 49 of the housing means 22, the end 40 of the blade 38 being secured to a terminal plate 50 carried by the housing means 22in the chamber 23 thereof and interconnected to an external terminal means 51 by an interconnecting cylindrical rivet means 52 whereby the external terminal 51 is electrically interconnected to the snap blade 38.
  • the other end 39 of the snap blade 38 carries contact means 53 adapted to cooperate with a fixed contact means 54 carried by a terminal plate 55 secured to the housing means 22 by a cylindrical rivet means 56 that electrically interconnects the plate 55 to external terminal means 57.
  • the free end 39 of the snap blade 38 is adapted to snap between the fixed contact 54 and a set screw 58 threadedly carried in a threaded bore 59 in the end wall 49 of the housing means 22 except that the snap blade 38 has a natural tendency to always return its contact 53 against the fixed contact 54 as will be apparent hereinafter.
  • Another terminal plate 60 is disposed in the recess or cavity 23 of the housing means 22 and is secured thereto by cylindrical rivet means 61 that electrically interconnects the plate 60 to an external terminal means 62.
  • An electrical resistance 63 has one of its leads 64 electrically interconnected to the plate 60 while the other terminal lead 65 thereof is electrically interconnected to the plate 50.
  • a power source lead 66 from a power source 67 is adapted to be electrically interconnected to the plate 60 at the terminal 62 while the other power source lead 68 is adapted to be interconnected to the plate 55 at the terminal 57.
  • One end 69 of the means 70 that controls a heating means, whether the means 70 is the heating means itself or control means for a heat exchanger or the like, is electrically interconnected to plate 50 at the terminal 51 by lead 71.
  • the other end of the means 70 is interconnected by a lead 72 to the terminal 62 that leads to the terminal plate 60 as fully illustrated in FIG. 3.
  • the current path includes lead 68 connected to one side of power source 67, terminal 57, plate 55, contact 54, contact 53, snap blade 38, plate 50, terminal 51, lead 71, heating means 70, lead 72 connected to terminal 62 of plate 60 and continues via lead 66 to the other side of power source 67. Since the electrical resistance 63 is connected between plates 50 and 60 it is in parallel with the heating means 70 and is therefore energized when heating means 70 is energized.
  • the cover member 26 that closes the open end of the chamber 23 includes an arcuate portion 73 that provides a recess means 74 for retaining the resistor 63 therein as fully illustrated in FIG. 4.
  • the cover member 26 has bores 75 and 76 passing therethrough for a purpose hereinafter described.
  • a U-shaped bimetal member 77 is provided and defines two parallel legs 78 and 79 interconnected together at adjacent ends thereof to a U-shaped elbow portion 80 that is adapted to be disposed around a pivot pin 81 carried within suitable apertures 82 of opposed cars 83 of the bracket member 27 as illustrated in FIG. 4.
  • the bracket member 27 has a pair of depending tan'gs 84 at one end 85 thereof that holds the elbow 80 against the pi'votshaft 81 in the manner fully illustrated in FIG. 4.so that the bimetal member 77 will pivot about the shaft 81'and, thus, about the frame means 21.
  • the leg 78 of the bimetal member has a tang 86 depending from the free end 87 thereof to be engaged by an arcuate cam track 88 on the selector means 28 which is adapted to be A pivoted on the bracket means 27 so that the cam track 88 will move across the longitudinal axis of the leg 78 and bear against the end tang 86 thereof so as to adjust the pivotal position of the bimetal member 77 relative to the frame means 21 and, thus, determine the temperature setting of the thermostatic device 20 as will be apparent hereinafter.
  • the other leg 79 of the bimetal member 77 has an internally threaded opening 89 passing through the free end 90 thereof and threadedly receiving an adjusting screw 91 which is alignable with the bore 75 in the cover member 26 when the bimetal member 77 is assembled to the bracket means 27 as illustrated in FIG. 4.
  • An insulating rod or pin 92 is disposed in the bore 75 of the cover member 26 so that the opposed ends 93 and 94 of the pin 92 can respectively engage the end 95 of the set screw 91 and the free end 39 of the snap blade 38 of the electrical switch means 24.
  • the selector means 28 has an outwardly directed and arcuately bent'tang 96 alignable with the other end 97 of the set screw 91 for a purpose hereinafter described.
  • thermostatic device 20 of this invention utilized in the control system of this invention, which is generally indicated by the reference numeral 98 in FIG. 3, will now be described.
  • the operator or the like positions the end 33 of the selector means 28 relative to the scale 34 for a desired temperature setting so that the thermostatic device 20 will tend to maintain the temperature in the room containing such thermostat 20 at the set temperature because thethermostat 20 will operate the heating means 70 when the temperature sensed in the room is below such setting of the end 33 of the selector means 28.
  • the cam track 88 has pivotally positioned the bimetal member 77 in such a manner that the leg 79 thereof has its free end 90 in such a position that leg 79 of the bimetal member 77 through the plunger or pin 92 acts against the end 39 of the snap blade 38 to overcome the natural bias of the snap blade 38 and maintain the snap blade 38 against the set screw 58 whereby no' current is adapted to flow between the spaced contacts 54 and 53 and, thus, no current is permitted to flow through the heating means 70 nor through resistance 63 connected in parallel across heating means 70.
  • the bimetal leg 79 by warping back and forth in response to temperature change will tend to maintain the temperature of the room at the temperature set by the selector means 28.
  • a second electrical switch means can be provided for the thermostat 20.
  • the second electrical switch is connected to open one side of the power source with switch means 24 connected to open and close the other side of the power source. Upon moving selector means 28 to the off position at least one side of the power source will be broken regardless of the position of the switch means 24.
  • FIGS. 8, 9 and 10 wherein another thermostatic device of this invention is generally indicated by the reference numeral 20A and parts thereof identical to the thermostat 20 previously described are indicated by like reference numerals followed by the reference letter A.
  • the thermostat device 20A is substantially identical to the thermostat device 20 previously described except that another switch means 99 is disposed in the chamber 23A and comprises'a switch blade 100 having one end 10] thereof secured to the housing means 22A bya cylindrical rivet 102, FIG. 8, that is electrically interconnected to an external tenninal means 62A.
  • the switch blade 100 is electrically interconnected to the switch blade 38 by the resistor means 63A having one of its leads 64A interconnected to the switch blade 100 while the other lead 65A thereof is interconnected to the plate 50A that is electrically interconnected to the snap blade 38A.
  • the other end 103 of the switch blade 100 can'ies a contact means 104 which is normally disposed in electrical contact with a fixed contact 105 carried by a contact blade 106 secured to the housing means 22A and being interconnected by a cylindrical rivet 107 to an external terminal means 108 that is adapted to-be interconnected to one side of the power source 67A of FIG. 8 by a lead 66A.
  • the other side of power source 67A is interconnected to the fixed contact 54A of the snap switch 24A in the manner previously described.
  • the heating means 70A is connected via leads 71A and 72A to terminals 51A and 62A respectively.
  • the switch means 99 In order for the heating means 70A to be operated by the power source 67A, the switch means 99 must be in a closed position as well as the switch means 24A.
  • Another insulating rod or pin 109 is disposed in the bore I 76A of the cover member 26A and has one opposed end 110 adapted to bear against switch blade 100 and the other op posed end 111 adapted to be alignable with another arcuate tang means 1 12 of the selector means 28A.
  • a thermostatic device having a frame means, electrical switch means carried by said frame means, a U-shaped bimetal member defining a pair of legs interconnected together at adjacent ends thereof by an elbow portion, said elbow portion pivotally mounting said bimetal member to said frame means, plunger means movably carried by said frame means and being disposed between one of said legs of said bimetal member and said switch means to operate said switch means in relation to-the position of said one leg relative to said frame means, and cam means movably carried by said .frame means and acting on the other leg of said bimetal member to adjust the pivotal position of said bimetal member and, thus, the temperature setting that said thermostatic devicewill open said switch means, said cam means being movable across the longitudinal axis of said other leg of said bimetal member to adjust the same.
  • a thermostatic device as set forth in claim 3 wherein said means for operatively engaging against said one leg of said bimetal member comprises another cam means.
  • a thermostatic device having a frame means, electrical switch means carried by said frame means, a U-shaped bimetal member defining a pair of legs interconnected together at adjacent ends thereof by an elbow portion, said elbow portion pivotally mounting said bimetal member to said frame means,
  • plunger means movably carried by said frame means and pivotally mounting said bimetal member to said frame means
  • plunger means movably carried by said frame means and being disposed between one of said legs of said bimetal member and said switch means to operate said switch means in relation tothe position of said one leg relative to said frame means, and cam means movably carried by said frame means and acting on the other leg of said bimetal member to adjust the pivotal position of said bimetal member and, thus, the temperature setting that said thermostatic device will open said switch means, said cam means being movable across the longitudinal axis of said other leg of said bimetal member to ad just the same, said cam means comprising part of a manual selector means for said device, said selector means having a tang that is to be manually grasped to move said selector means, said tang providing temperature setting and indicating means for said device.
  • a thermostatic device having a frame means, electrical switch means carried by said frame means, a U-shaped bimetal member defining a pair of legs interconnected together at adjacent ends thereof by an elbow portion, said elbow portion pivotally mounting said bimetal member to said frame means, plunger means movably carried by said frame means and being disposed between one of said legs of said bimetal member and said switch means to operate said switch means in relation to the position of said one leg relative to said frame means, and'cam means movably carried by said frame means and acting on the other leg of said bimetal member to adjust the pivotal position of said bimetal member, and, thus, the temperature setting that said thermostatic device will open said switch means, said cam means being movable across the longitudinal axis of said other leg of said bimetal member to adjust the same, said one leg of said bimetal member carrying an adjusting member having one end engaging said plunger means.
  • said means for operatively engaging against said one leg of said bimetal member comprises another cam means, said other cam means comprising an arcuately disposed cam tang of said selector means.
  • a thermostatic device having a frame means, electrical switch means carried by said frame means, a U-shaped bimetal member defining a pair of legs interconnected together at adjacent ends thereof by an elbow portion, said elbow portion.
  • a thermostatic device as set forth in claim 12 wherein said means for engaging said-other plunger means comprises another cam means carried by said selector means.
  • a thermostatic device having a frame means, electrical switch means carried by said frame means, a U-shaped bimetal member defining a pair of legs interconnected together at adjacent ends thereof by an elbow portion, said elbow portion pivotally mounting said bimetal member to said frame means, plunger means movably carried by said frame means and being disposed between one of said legs of said bimetal member and said switch means to operate said switch means in relation to the position of said one leg relative to said frame means, and cam means movably carried by said frame means and acting on the other leg of said bimetal memberto adjust the pivotal position of said bimetal member and, thus, the temperature setting that said thermostatic device will open said switch means, said cam means being movable across the iongitudinal axis of said other leg of said bimetal member to adjust the same, said frame means carrying a pivot pin and havingtang means disposed adjacent said pivot pin means, said elbow of said bimetal member receiving said pivot pin and being disposed between said tang means and said pivot pin to be pivotally mounted to said frame means
  • a thermostatic device having a frame means, electrical switchmeans carried by said frame means and being electrically interconnected to said source and to said heating means to interconnect said source to said heating means when said switch means is closed and to disconnect said source from said heating means when said'switch means is open, a U- shaped bimetal member defining a pair of legs-interconnected together at adjacent ends thereof by an elbow portion, said elbow portion pivotally mounting said bimetal member to said frame means, plunger means movably carried by said frame means and beingdisposed between one of said legs of said bimetal member and said switch means to operate said switch means in relation to the position of said one leg relative to said frame means, and cam means movably carried by said frame means and acting on the other leg of said bimetal member to adjust the pivotal position of said bimetal member and, thus, the temperature setting that said thermostatic device will open said switch means, said cam means being movable across the longitudinal axis of
  • cam means comprises part of a manual selector means for said device.
  • said manual selector means has means for operatively engaging against said one leg of said bimetal member to directly move said one leg-and said plunger means to a position that opens said switch means.
  • a control system having a source of electrical current and an electrically operated heating means, the improvement comprising a thermostatic device having a frame means, electrical switch means carried by said frame means and being electrically interconnected to said source and to said heating means to interconnect said source.
  • a U- shaped bimetal member defining a pair of legs interconnected together at adjacent ends thereof by an elbow portion, said elbow portion pivotally mounting said bimetal member to said frame means, plunger means movably carried by said frame means and being disposed between one of said legs of said bimetal member and saidswitch means to operate said switch means in relation to the position of said one leg relative to said frame means, and cam means movably carried by said frame means and acting on the other leg of said bimetal member to adjust the pivotal position of said bimetal member and, thus, the temperature setting that said thermostatic device will open said switch means, said cam means being movable across the longitudinal axis of said other leg of said bimetal member to adjust the same, said cam means comprising part of a manual selector means for said device, said manual selector means having means for operatively engaging against said one leg of said bimetal member to directly move said one leg and said plunger means to
  • cam means comprises a cam track on said selector means.
  • a thermostatic device having a frame means, electrical switch means carried by said frame means and being electrically interconnected to said source and to said heating means to interconnect said source to said heating means when said switch means is closed and to disconnect said source from said heating means when said switch means is open, a U- shaped bimetal member defining a pair of legs interconnected together at adjacent ends thereof by an elbow portion, said elbow portion pivotally mounting said bimetal member to said frame means.
  • plunger means movably carried by said frame means and being disposed between one of said legs of said bimetal member and said switch means to operate said switch means in relation to the position of said one leg'relative to said frame means, and cam means movably carried by said frame means and acting on the other leg of said bimetal member to adjust the pivotal position of said bimetal'm'ember.
  • said cam means being movable across the longitudinal axis of said other legvof said bimetal member to adjust the same, said cam means comprising part of a manual selector means for said device, said selector means having a tang that is to be manually grasped to move said selector means, said tang providing temperature setting and indicating means for said device.
  • a thermostatic device having a frame means, elec trical switch means carried by said frame means and being electrically interconnected to said source and to said heating means to interconnect said source to said heating means when said switch means is closed and to disconnect said source from said heating means when said switch means is open, a U shaped bimetal member defining a pair of legs interconnected together at adjacent ends thereof by an elbow portion, said elbow portion pivotally mounting said bimetal member to said frame means, plunger means movably carried by said frame -means and being disposed between one of said legs of said bimetal member and said switch means to operate said switch means in relation to the position of said one leg relative to said frame means, and cam means movablycarried by said frame means and acting on the other leg of said bimetal member to adjust the pivotal position of said bimetal member and, thus, the temperature setting that said thermostatic device will open said switch means, said cam means being movable across the
  • a thermostatic device having a frame means, electrical switch means carried by said frame means and being electrically interconnected to said source and to said heating means to interconnect said source to said heating means when said switch means is closed and to disconnect said source from said heating means when said switch means is open, a U- shaped bimetal member defining a pair of legs interconnected together at adjacent ends thereof by an elbow portion, said elbow portion pivotally mounting said bimetal member to said frame means, plunger means movably carried by said frame means and being disposed between one of said legs of said bimetal member and said switch means to operate said switch means in relation to the position of said one leg relative to said frame means, and cam means movably carried by said frame means and acting on the other leg of said bimetal member to adjust the pivotal position of said bimetal member and, thus, the temperature setting that said thermostatic device will open said switch means, said cam means being movable across the longitudinal axis of said other leg
  • cam means comprises part of a manual selector means for said device, said frame means carrying another movable plunger means for operating said other switch means, said selector means having means for engaging and moving said other plunger means to open said other switch means.
  • a thermostatic device having a frame means, electrical switch means carried by said frame means and being electrically interconnected to said source and to said heating means to interconnect said source to said heating means when said switch means is closed and to disconnect said source from said heating means when said switch means is open, a U- shaped bimetal member defining a pair of legs interconnected together at adjacent ends thereof by an elbow portion, said elbow portion pivotally mounting said bimetal member to said frame means, plunger means movably carried by said frame means and being disposed between one of said legs of said bimetal member and said switch means to operate said switch means in relation to the position of said one leg relative to said frame means, and cam means movably carried by said frame means and acting on the other leg of said bimetal member to adjust the pivotal position of said bimetal member to adjust the pivotal position of said bimetal member and, thus, the temperature setting that said thermostatic device will open said switch means, said cam means being

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  • Control Of Resistance Heating (AREA)
  • Control Of Temperature (AREA)
US79122A 1970-10-08 1970-10-08 Thermostatic control device and system utilizing the same Expired - Lifetime US3665363A (en)

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US7912270A 1970-10-08 1970-10-08

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US (1) US3665363A (enExample)
AU (1) AU3431971A (enExample)
CA (1) CA952166A (enExample)
DE (1) DE2150109A1 (enExample)
FR (1) FR2111127A5 (enExample)
GB (1) GB1344910A (enExample)
IT (1) IT938995B (enExample)
NL (1) NL7113760A (enExample)
SE (1) SE371715B (enExample)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3681564A (en) * 1968-06-07 1972-08-01 Nippon Steel Corp Automatic oscillating arc welding method and apparatus
US6404321B1 (en) * 1999-03-23 2002-06-11 Behr Thermot-Tronik Gmbh & Co. Actuator

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59707167D1 (de) * 1997-11-27 2002-06-06 Siemens Building Tech Ag Antriebseinrichtung zum reversiblen Antrieb eines Ventils

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3681564A (en) * 1968-06-07 1972-08-01 Nippon Steel Corp Automatic oscillating arc welding method and apparatus
US6404321B1 (en) * 1999-03-23 2002-06-11 Behr Thermot-Tronik Gmbh & Co. Actuator

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DE2150109A1 (de) 1972-04-13
AU3431971A (en) 1973-04-12
IT938995B (it) 1973-02-10
SE371715B (enExample) 1974-11-25
GB1344910A (en) 1974-01-23
NL7113760A (enExample) 1972-04-11
FR2111127A5 (enExample) 1972-06-02
CA952166A (en) 1974-07-30

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