US3244848A - Ganging means for switch bodies - Google Patents
Ganging means for switch bodies Download PDFInfo
- Publication number
- US3244848A US3244848A US280488A US28048863A US3244848A US 3244848 A US3244848 A US 3244848A US 280488 A US280488 A US 280488A US 28048863 A US28048863 A US 28048863A US 3244848 A US3244848 A US 3244848A
- Authority
- US
- United States
- Prior art keywords
- switch
- contact
- terminal
- strip
- switch bodies
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/02—Details
- H01H13/26—Snap-action arrangements depending upon deformation of elastic members
- H01H13/36—Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/0056—Apparatus or processes specially adapted for the manufacture of electric switches comprising a successive blank-stamping, insert-moulding and severing operation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49105—Switch making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49117—Conductor or circuit manufacturing
- Y10T29/49204—Contact or terminal manufacturing
Definitions
- This invention relates to electrical switches and more particularly to an improved snap action precision switch and a process for mass-producing such switches.
- the primary object of this invention is to provide a switch which is fabricated largely of stamped parts which are so arranged as to lend themselves readily to high production without adjustment.
- Another object of this invention is to provide a switch in which all of the critical parts are inherently properly aligned.
- a further object of this invention is to provide a process for fabricating a snap action switch which will insure the accurate location of contacts and supports during final assembly.
- a still further object is to provide a switch in which the base of the housing is molded around the blade contact supports and can be molded in multiple units to greatly decrease fabricating costs.
- a final object of this invention is to provide a switch which can be easily ganged.
- FIG. 1 is a side elevation partly in section of a complete snap action switch
- FIG. 2 is a plan view of a switch with the cover removed
- FIG. 3 shows the first step in the process showing the terminal strip
- FIG. 4 shows the terminal strip with the contacts in lace
- FIG. 5 shows the terminal strip with the upper portion trimmed off
- FIG. 6 shows the terminal strip with the plastic body molded thereon
- FIG. 7 shows the terminal strip with the lower portion trimmed off
- FIG. 8 is a view taken on line 88 of FIG. 1;
- FIG. 9 shows a plurality of switches mounted on a single bar
- FIG. 10 is taken on line 10--10 of FIG. 1;
- FIG. 11 shows a modified form of contact
- FIG. 12 shows another modified form of contact.
- FIGS. 1 and 2 show the complete switch contemplated by the invention.
- the terminals 10, 12 and 14 are first stamped in a unit which is part of a metal strip in which any number of units can be stamped simultaneously.
- the units are retained in strip form to reduce handling and thereby elimi' nate individual fabrication.
- Each unit includes terminals 10, 1'2 and 14, upper web 28, lower web 30, anchor 32 and pivot 34.
- Contact supporting slots 36 are also stamped in each unit.
- Silver contacts 20 and 22 are then mounted (FIG. 4) in the slots 36 by peening the divergent portion of the contact into the slot. This provides a rigid fit that will not be easily displaced. Where a lower amperage operation is contemplated the contacts may be modified to use brass points 40 (FIG. 11) stamped with the original strip or circular slugs 43 (FIG. 12) also peened into appropriate curved slots. These contacts can be peened simultaneously along an entire strip of units without distorting the contact points due to the presence of the webs 28 and 30.
- the upper web 28 is then trimmed (FIG. 5) from each unit in .a single operation on the strip.
- the upper ends of the terminals 10, 12 and 14 are then separated one from the other with the blade anchor and pivot being an integral part of .terminal 10.
- Upper contact 20 is integral with terminal 14 and lower contact 22 is integral with terminal 12.
- the terminal strip is set.in a multiple mold and the body 16 is molded to each unit in the strip.
- the terminals are still connected by web 30 and need not be separately jigged during the molding operation.
- Each unit is provided with a number of holes 42 for the plastic to flow through to hold the terminals in place.
- the lower web is then trimmed, FIG. 7, from the unit, leaving the terminals 10, 12 and 14 insulated one from the other. Simultaneously with this step the adjacent body units are separated from each other leaving each switch an independent unit.
- Blade 18, FIG. 2, which has been separately stamped is next secured to the anchor and pivot.
- Anchor 32 is inserted through slot 44 in the mounting tongue 46 and is swedged to make a rigid fit.
- the compression tongue 48 is then inserted into pivot 34 so that the contact end 50 is forced against upper contact 20.
- the accuracy of the switch is increased because the anchor, pivot, contacts and terminals are all in one plane omitting the necessity of providing for side forces.
- An actuating button 26 is inserted through a hole 52 in cover 24 and retained in the cover by head 54.
- the cover preferably a resilient thermoplastic, is then snapped onto rail 56 provided along the sides of the body 16, FIG. 8, and slot 58 formed on the inside of the cover fits over the contact end of the terminal 14 to prevent it from being misaligned.
- the button 26- is depressed against bridge 60 of the blade.
- the rails 62 will move downward until a point is reached where the force of the compression tongue on the contact end will be reversed to snap the contact end down against the lower contact, closing the circuit through terminal 12 and opening the circuit through terminal 14.
- the bridge will move upward, again reversing the force of the compression tongue on the contact end and snapping the end up against the upper contact, opening the circuit through terminal 12 and closing the circuit through terminal 14.
- the switches can be easily ganged by sliding a bolt or bar 66 through hole 68 provided in the body.
- a lug 69 and recess 70 provided on the sides of the body will interlock to form a unitary ganged structure as shown in FIG. 9.
- the locating lug and recess arrangement permits gauging the switches with use of only one bolt or the like.
- a switch body comprising a lug on one side of the body, a recess on the otherside of the body, said lug and'recess being disposed on a common axis, and a hole through the body on an axis parallel to but spaced from the lug recess axis, whereby a plurality of switch bodies can be gauged in side-by-side relation with a lug of one switch body fitting into a recess of an adjacent switch body and References Cited by the Examiner UNITED STATES PATENTS 2,397,102 3/1946 Graham 339198 2,469,397 5/1949 Mezek 339198 2,623,087 12/1952 Latta 339198 2,780,791 2/ 1957 Morschel 339-198 2,875,306 2/1959 Allen 200-168 KATHLEEN H. CLAFFY, Primary Examiner.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Switches (AREA)
- Switch Cases, Indication, And Locking (AREA)
Description
April 5, 1966 H. R. CHAPlN GANGING MEANS FOR SWITCH BODIES Original Filed May 27, 1959 2 Sheets-Sheet 1 m ml IIL. I m
Fua.2
Fm, I0
1NVENTOR$ flow/ 81) E a/s ODS/5P4 J. mas/4 ATTORNEY A ril 5, 1966 H. R. CHAPIN ETAL. 5
GANGING MEANS FOR SWITCH BODIES Original Filed May 2'7, 1959 2 Sheets-Sheet 3 1 &1 Q 1 v L Z6 35 2.6
Fl Ca. 9 5;B 9/ Il/ z 4 z 5 5 5e Fl 8 INVENTO s a MWAPD P. 0/? PA!) BY Ton-P4 -7- W 8627M) MM/ 3,244,848 GANGING MEANS FOR SWITCH BODIES Howard R. Chapin, Park Ridge, and Joseph J. Kaleba,
Roselle, Ill., assignors to Controls Company of America, Schiller Park, Ill., a corporation of Delaware Application Aug. 27, 1962, Ser. No. 219,790, now Patent No. 3,189,703, dated June 15, 1965, which is a continuation of application Ser. No. 816,189, May 27, 1959. Divided and this application Apr. 26, 1963, Ser. No. 280,488
' 1 Claim. (Cl. 200-168) This application is a division of application Serial Number 219,790, now Patent No. 3,189,703, issued June 15, 1965, which is a continuation of application Serial Number 816,189, filed May 27, 1959, and now abandoi'led.
This invention relates to electrical switches and more particularly to an improved snap action precision switch and a process for mass-producing such switches.
Precision snap action switches require accurate pivot and anchor points to assure proper alignment of the parts -to provide precise operation of the switch. Formerly switches of this nature had relied on a combination of stamped and formed parts to complete the finished product. While accuracy and uniformity are inherent in stamped parts over extended production, forming tools are relatively inaccurate and do not have precision necessary to provide consistent snap action in the switch.
The primary object of this invention is to provide a switch which is fabricated largely of stamped parts which are so arranged as to lend themselves readily to high production without adjustment.
Another object of this invention is to provide a switch in which all of the critical parts are inherently properly aligned.
A further object of this invention is to provide a process for fabricating a snap action switch which will insure the accurate location of contacts and supports during final assembly.
A still further object is to provide a switch in which the base of the housing is molded around the blade contact supports and can be molded in multiple units to greatly decrease fabricating costs.
A final object of this invention is to provide a switch which can be easily ganged.
Other objects and advantages will be pointed out in, or be apparent from, the specification and claim, as will obvious modifications of the single embodiment shown in the drawings in which:
FIG. 1 is a side elevation partly in section of a complete snap action switch;
FIG. 2 is a plan view of a switch with the cover removed;
FIG. 3 shows the first step in the process showing the terminal strip;
FIG. 4 shows the terminal strip with the contacts in lace;
p FIG. 5 shows the terminal strip with the upper portion trimmed off;
FIG. 6 shows the terminal strip with the plastic body molded thereon;
FIG. 7 shows the terminal strip with the lower portion trimmed off;
FIG. 8 is a view taken on line 88 of FIG. 1;
FIG. 9 shows a plurality of switches mounted on a single bar;
FIG. 10 is taken on line 10--10 of FIG. 1;
FIG. 11 shows a modified form of contact; and
FIG. 12 shows another modified form of contact.
Referring to the drawings, FIGS. 1 and 2 show the complete switch contemplated by the invention. The
United States Patent 3,244,848 Patented Apr. 5, 1966 switch includes terminals 10, 12 and 14, plastic body 16, blade 18, stationary contacts 20 and 22, and a cover 24 supporting an actuating button 26.
The terminals 10, 12 and 14 are first stamped in a unit which is part of a metal strip in which any number of units can be stamped simultaneously. The units are retained in strip form to reduce handling and thereby elimi' nate individual fabrication. Each unit includes terminals 10, 1'2 and 14, upper web 28, lower web 30, anchor 32 and pivot 34. Contact supporting slots 36 are also stamped in each unit.
The upper web 28 is then trimmed (FIG. 5) from each unit in .a single operation on the strip. The upper ends of the terminals 10, 12 and 14 are then separated one from the other with the blade anchor and pivot being an integral part of .terminal 10. Upper contact 20 is integral with terminal 14 and lower contact 22 is integral with terminal 12.
The terminal strip is set.in a multiple mold and the body 16 is molded to each unit in the strip. The terminals are still connected by web 30 and need not be separately jigged during the molding operation. Each unit is provided with a number of holes 42 for the plastic to flow through to hold the terminals in place.
The lower web is then trimmed, FIG. 7, from the unit, leaving the terminals 10, 12 and 14 insulated one from the other. Simultaneously with this step the adjacent body units are separated from each other leaving each switch an independent unit.
An actuating button 26 is inserted through a hole 52 in cover 24 and retained in the cover by head 54. The cover, preferably a resilient thermoplastic, is then snapped onto rail 56 provided along the sides of the body 16, FIG. 8, and slot 58 formed on the inside of the cover fits over the contact end of the terminal 14 to prevent it from being misaligned.
To operate the switch, the button 26- is depressed against bridge 60 of the blade. The rails 62 will move downward until a point is reached where the force of the compression tongue on the contact end will be reversed to snap the contact end down against the lower contact, closing the circuit through terminal 12 and opening the circuit through terminal 14. When the button is released, the bridge will move upward, again reversing the force of the compression tongue on the contact end and snapping the end up against the upper contact, opening the circuit through terminal 12 and closing the circuit through terminal 14.
Where a multiple switch installation is required, the switches can be easily ganged by sliding a bolt or bar 66 through hole 68 provided in the body. A lug 69 and recess 70 provided on the sides of the body will interlock to form a unitary ganged structure as shown in FIG. 9. Thus the locating lug and recess arrangement permits gauging the switches with use of only one bolt or the like.
Although but one embodiment of the present invention has been illustrated and described, it will be apparent to those skilled in the art that various changes and modifications may be made therein without departing from the spirit of the invention or from the scope of the appended claim.
We claim: Y
A switch body comprising a lug on one side of the body, a recess on the otherside of the body, said lug and'recess being disposed on a common axis, and a hole through the body on an axis parallel to but spaced from the lug recess axis, whereby a plurality of switch bodies can be gauged in side-by-side relation with a lug of one switch body fitting into a recess of an adjacent switch body and References Cited by the Examiner UNITED STATES PATENTS 2,397,102 3/1946 Graham 339198 2,469,397 5/1949 Mezek 339198 2,623,087 12/1952 Latta 339198 2,780,791 2/ 1957 Morschel 339-198 2,875,306 2/1959 Allen 200-168 KATHLEEN H. CLAFFY, Primary Examiner.
BERNARD A. GILHEANY, ROBERT K. SCHAEFER,
Examiners.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2568/60A GB882850A (en) | 1959-05-27 | 1960-01-25 | Improvements in and relating to snap action electrical switches and a process for making the switches |
FR819055A FR1248956A (en) | 1959-05-27 | 1960-02-19 | Precision snap-action switch |
DEC21334A DE1120544B (en) | 1959-05-27 | 1960-04-30 | Snap-action electrical switch and method for its manufacture |
US219790A US3189703A (en) | 1959-05-27 | 1962-08-27 | Snap-action electrical switch having planar terminals mounted in a common plane |
US280488A US3244848A (en) | 1959-05-27 | 1963-04-26 | Ganging means for switch bodies |
US280487A US3263306A (en) | 1959-05-27 | 1963-04-26 | Method of making a snap action switch |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US81618959A | 1959-05-27 | 1959-05-27 | |
US219790A US3189703A (en) | 1959-05-27 | 1962-08-27 | Snap-action electrical switch having planar terminals mounted in a common plane |
US280488A US3244848A (en) | 1959-05-27 | 1963-04-26 | Ganging means for switch bodies |
US280487A US3263306A (en) | 1959-05-27 | 1963-04-26 | Method of making a snap action switch |
Publications (1)
Publication Number | Publication Date |
---|---|
US3244848A true US3244848A (en) | 1966-04-05 |
Family
ID=27499161
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US219790A Expired - Lifetime US3189703A (en) | 1959-05-27 | 1962-08-27 | Snap-action electrical switch having planar terminals mounted in a common plane |
US280488A Expired - Lifetime US3244848A (en) | 1959-05-27 | 1963-04-26 | Ganging means for switch bodies |
US280487A Expired - Lifetime US3263306A (en) | 1959-05-27 | 1963-04-26 | Method of making a snap action switch |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US219790A Expired - Lifetime US3189703A (en) | 1959-05-27 | 1962-08-27 | Snap-action electrical switch having planar terminals mounted in a common plane |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US280487A Expired - Lifetime US3263306A (en) | 1959-05-27 | 1963-04-26 | Method of making a snap action switch |
Country Status (4)
Country | Link |
---|---|
US (3) | US3189703A (en) |
DE (1) | DE1120544B (en) |
FR (1) | FR1248956A (en) |
GB (1) | GB882850A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3369093A (en) * | 1966-08-16 | 1968-02-13 | Texas Instruments Inc | Snap acting thermally responsive element with contacts at the periphery thereof in rocking and sliding engagement with corresponding fixed contacts during snap action |
US3449534A (en) * | 1967-03-08 | 1969-06-10 | Robertshaw Controls Co | Switch blade with straight sided stiff tongue and arcuate sided bowed flexible tongue |
US4112270A (en) * | 1977-09-02 | 1978-09-05 | Rys Tadeusz J | Means connecting circuit breaker and auxiliary feature modules |
US4224488A (en) * | 1977-07-13 | 1980-09-23 | Ranco Incorporated | Electrical switch devices |
US4764649A (en) * | 1985-12-13 | 1988-08-16 | Matsushita Electric Works, Ltd. | Snap switch with a separate leaf spring biasing member |
US4912289A (en) * | 1988-12-21 | 1990-03-27 | Eaton Corporation | Quieted fast acting switch assembly with visco-elastic polymer laminated between metal layers |
US5111010A (en) * | 1989-03-31 | 1992-05-05 | Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho | Switch device |
US5630720A (en) * | 1995-03-28 | 1997-05-20 | The Whitaker Corporation | Self polarizing electrical contact |
US5772476A (en) * | 1995-06-20 | 1998-06-30 | Schneider Electric Sa | Electrical control or signalling device fitted with a detachable unit |
US20040156166A1 (en) * | 2002-11-29 | 2004-08-12 | No Yang Hwan | Control panel of washing machine |
US20100230269A1 (en) * | 2007-01-10 | 2010-09-16 | Wildman Craig R | Pressure differential switch |
Families Citing this family (26)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3327372A (en) * | 1964-06-30 | 1967-06-27 | Berg Electronics Inc | Method for forming a double curvature connector |
US3260814A (en) * | 1964-08-19 | 1966-07-12 | Square D Co | Single pole snap switch with a guideplate detachably mounted between juxtaposed casing elements |
DE1220006B (en) * | 1964-10-21 | 1966-06-30 | Preh Elektro Feinmechanik | Short-stroke switch for attachment to control elements, especially rotary resistors for printed circuits |
US3377454A (en) * | 1965-10-02 | 1968-04-09 | Amf Electrica S P A | Threaded quick coupling pushbutton holder for microswitches |
NL136063C (en) * | 1968-03-23 | |||
US3768158A (en) * | 1971-10-22 | 1973-10-30 | Stewart Warner Corp | Buzzer manufacturing method |
US3938143A (en) * | 1971-10-22 | 1976-02-10 | Stewart-Warner Corporation | Buzzer |
US4044212A (en) * | 1972-09-26 | 1977-08-23 | Tetsuo Takano | Electric switches and process and apparatus for manufacture thereof |
US3967369A (en) * | 1972-09-26 | 1976-07-06 | Takano Precision Industry Co., Ltd. | Process for making electrical switches |
IT1013393B (en) * | 1973-06-13 | 1977-03-30 | Matsushita Electric Works Ltd | PROCEDURE FOR THE MANUFACTURE OF MICROSWITCHES |
US3995365A (en) * | 1975-01-13 | 1976-12-07 | Otto Engineering, Inc. | Method of forming electrical contacts |
US4112576A (en) * | 1975-11-17 | 1978-09-12 | Harry Robert Gross | Method of making a switch |
GB1579715A (en) * | 1977-03-12 | 1980-11-26 | Omron Tateisi Electronics Co | Contacless switch and method of making the same |
US4312122A (en) * | 1979-08-08 | 1982-01-26 | Robertshaw Controls Company | Apparatus and method for forming an electrical switch assembly |
JPS5932850B2 (en) * | 1979-12-10 | 1984-08-11 | 富士通株式会社 | Manufacturing method of push button switch |
FR2568054B1 (en) * | 1984-07-23 | 1987-05-22 | Crouzet Sa | SUBMINIATURE MICROSWITCH |
JPS6154119A (en) * | 1984-08-24 | 1986-03-18 | 松下電工株式会社 | Small-sized switch |
US4673778A (en) * | 1985-02-05 | 1987-06-16 | The Cherry Corporation | Snap action switch |
US4983794A (en) * | 1988-07-26 | 1991-01-08 | Kabushiki Kaisha Tokai Rika Denki Seisakusho | Snap action switching device |
US5006680A (en) * | 1989-05-05 | 1991-04-09 | Augat, Inc. | Snap action switch |
FR2671661B1 (en) * | 1991-01-11 | 1993-04-23 | Sextant Avionique | SNAPSHOT MICRO SWITCH BLADE. |
DE4202309C2 (en) * | 1992-01-28 | 1996-10-17 | Hermann Dipl Ing Buehl | Microswitch |
DE19512277A1 (en) * | 1994-04-19 | 1995-10-26 | Marquardt Gmbh | Snap-action electrical switch and assembly |
US6496097B2 (en) | 1999-09-21 | 2002-12-17 | General Electric Company | Dual circuit temperature controlled switch |
US6525641B1 (en) * | 1999-09-21 | 2003-02-25 | General Electric Company | Defrost on demand thermostat |
US7081593B2 (en) * | 2004-12-15 | 2006-07-25 | John David Hopkins | Quiet snap action switch |
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US2397102A (en) * | 1942-10-28 | 1946-03-26 | Westinghouse Electric Corp | Terminal block |
US2469397A (en) * | 1945-11-14 | 1949-05-10 | Melvin E Mezek | Electrical connector |
US2623087A (en) * | 1949-12-09 | 1952-12-23 | Gen Electric | Fabricated terminal board |
US2780791A (en) * | 1952-03-04 | 1957-02-05 | Morschel Franz | Wire connector with dovetailed casing |
US2875306A (en) * | 1957-04-19 | 1959-02-24 | Milli Switch Corp | Mounting means for switch units |
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US2832127A (en) * | 1955-11-29 | 1958-04-29 | Gen Electric | Method of making electrical contacts |
US2988606A (en) * | 1957-12-19 | 1961-06-13 | Cts Corp | Electric switch and method of making |
US2905782A (en) * | 1957-12-23 | 1959-09-22 | Controls Co Of America | Snap switch blade |
US2954469A (en) * | 1958-12-22 | 1960-09-27 | Oak Mfg Co | Switch type television tuner with stamped tuning element mounted on stationary contacts |
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-
1960
- 1960-01-25 GB GB2568/60A patent/GB882850A/en not_active Expired
- 1960-02-19 FR FR819055A patent/FR1248956A/en not_active Expired
- 1960-04-30 DE DEC21334A patent/DE1120544B/en active Pending
-
1962
- 1962-08-27 US US219790A patent/US3189703A/en not_active Expired - Lifetime
-
1963
- 1963-04-26 US US280488A patent/US3244848A/en not_active Expired - Lifetime
- 1963-04-26 US US280487A patent/US3263306A/en not_active Expired - Lifetime
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US2397102A (en) * | 1942-10-28 | 1946-03-26 | Westinghouse Electric Corp | Terminal block |
US2469397A (en) * | 1945-11-14 | 1949-05-10 | Melvin E Mezek | Electrical connector |
US2623087A (en) * | 1949-12-09 | 1952-12-23 | Gen Electric | Fabricated terminal board |
US2780791A (en) * | 1952-03-04 | 1957-02-05 | Morschel Franz | Wire connector with dovetailed casing |
US2875306A (en) * | 1957-04-19 | 1959-02-24 | Milli Switch Corp | Mounting means for switch units |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3369093A (en) * | 1966-08-16 | 1968-02-13 | Texas Instruments Inc | Snap acting thermally responsive element with contacts at the periphery thereof in rocking and sliding engagement with corresponding fixed contacts during snap action |
US3449534A (en) * | 1967-03-08 | 1969-06-10 | Robertshaw Controls Co | Switch blade with straight sided stiff tongue and arcuate sided bowed flexible tongue |
US4224488A (en) * | 1977-07-13 | 1980-09-23 | Ranco Incorporated | Electrical switch devices |
US4112270A (en) * | 1977-09-02 | 1978-09-05 | Rys Tadeusz J | Means connecting circuit breaker and auxiliary feature modules |
US4764649A (en) * | 1985-12-13 | 1988-08-16 | Matsushita Electric Works, Ltd. | Snap switch with a separate leaf spring biasing member |
US4912289A (en) * | 1988-12-21 | 1990-03-27 | Eaton Corporation | Quieted fast acting switch assembly with visco-elastic polymer laminated between metal layers |
US5111010A (en) * | 1989-03-31 | 1992-05-05 | Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho | Switch device |
US5630720A (en) * | 1995-03-28 | 1997-05-20 | The Whitaker Corporation | Self polarizing electrical contact |
US5772476A (en) * | 1995-06-20 | 1998-06-30 | Schneider Electric Sa | Electrical control or signalling device fitted with a detachable unit |
US20040156166A1 (en) * | 2002-11-29 | 2004-08-12 | No Yang Hwan | Control panel of washing machine |
US20100230269A1 (en) * | 2007-01-10 | 2010-09-16 | Wildman Craig R | Pressure differential switch |
US8362375B2 (en) * | 2007-01-10 | 2013-01-29 | Unicontrol, Inc. | Pressure differential switch |
Also Published As
Publication number | Publication date |
---|---|
GB882850A (en) | 1961-11-22 |
DE1120544B (en) | 1961-12-28 |
US3263306A (en) | 1966-08-02 |
US3189703A (en) | 1965-06-15 |
FR1248956A (en) | 1960-12-23 |
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