US2810035A - Electrical switch - Google Patents

Electrical switch Download PDF

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Publication number
US2810035A
US2810035A US506248A US50624855A US2810035A US 2810035 A US2810035 A US 2810035A US 506248 A US506248 A US 506248A US 50624855 A US50624855 A US 50624855A US 2810035 A US2810035 A US 2810035A
Authority
US
United States
Prior art keywords
housing
toggle
switch
side walls
toggle member
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
Application number
US506248A
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English (en)
Inventor
Herrmann Otto
Paule Kurt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US2810035A publication Critical patent/US2810035A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/26—Details
    • H01H35/30—Means for transmitting pressure to pressure-responsive operating part, e.g. by capsule and capillary tube
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
    • H01H35/26—Details
    • H01H35/2607—Means for adjustment of "ON" or "OFF" operating pressure

Definitions

  • the present invention relates to an electrical switching arrangement. More particularly the present invention relates to a new and improved snap-acting electrical switch.
  • Another object of the present invention is to provide a new and improved snap-acting electrical switch.
  • a further object of the present invention is to provide a compact and inexpensive electrical switch capable of carrying substantially high current loads.
  • Still a further object of the present invention is to provide a pressure actuated snap-acting electrical switch.
  • the present invention relates to an electrical switching arrangement including a housing, a double-armed toggle member pivotally mounted in the housing at a point between the arms thereof and turnable between two positions, a switch member movable between open and closed conditions and operatively connected to a toggle arm of the toggle member so as to be in one of the conditions when the toggle member is in one of the positions and to be in the other of the conditions when the toggle member is in the other of the positions, operating means engaging one of the toggle arms of the toggle member for turning the same from one of the positions to the other position thereof, and spring means engaging the other of the toggle arms of the toggle member and permanently tending to turn the same toward one position thereof.
  • Fig. l is a transverse sectional view of one embodiment of the apparatus taken along the line I-l of Fig. 2;
  • Fig. 2 is a plan View of the apparatus with the cover removed and some of the parts shown partially in section;
  • Fig. 3 is a sectional view taken along the line IIL-III of Fig. 2;
  • Fig. 4 is a perspective view of la double-armed toggle member used in a preferred embodiment of the apparatus.
  • Fig. 5 is an exploded View of the apparatus showing how the various elements are arranged in the housing.
  • the apparatus is contained in a housing having a U-shaped portion with facing side walls 51 and 52.
  • the edges of the side walls are substantially parallel to each other and have rounded portions 54.
  • Slidably cooperating with the side walls 51 and 52 are the two remaining side Walls and 56 which have rounded tabs 57 at their edges for gripping the adjacent ice side walls so that the side Walls of the housing are interlocked.
  • a cover member 6l having anges o6 and 67. may be fastened to the three side walls 51, 52 and 56. Disposed in the side wall 55 is a membrane 20 connected to a fluid conduit 22 which is used for a purpose to be described hereinbelow.
  • the toggle member contains outer wall portions 9 and it) and an inner U-shaped portion 11. Extending through the iiat walls 9 and 10 is a pin 12 which can be used for pivotally mounting the toggle member. A second pin 26 extends through an arm 0f the toggle member between the walls 9 and 10.
  • the U-shaped portion 11 contains a recess 16 in the other arm of the toggle mmeber and has two U-shaped portions in which two actuating members 33 and 34 may be threadedly mounted.
  • the toggle member is pivotally mounted on the bottom of the housing 50. This can be best seen in Fig. 3 where the pin l2 is shown extending through the side portions 13 and 14 of a LJ-shaped stirrup 15. rhe stirrup .l5 may be welded to the bottom of the housing or otherwise fixedly connected thereto.
  • a snap-acting switch element 36 having two longitudinal slits 37 and a central portion 35. As can be seen in Fig. 2 the central portion 3S is bowed out from the plane of the element 36 which is made of an electrically conductive material.
  • the electrically conductive element 36 is mounted within an insulated yoke 45 having side portions 46 which are mounted in corresponding grooves in the side walls 5i. and 52 of the housing. Connections to the snap-acting element 36 are made by electrically-conductive bars 39 and 4E.. Conductors 29 can be attached to the bars 39 and 41 by means of screws 49.
  • the insulated yoke 4S is comparatively thin with respect to the width of the housing and is mounted within the U- shaped portion 11 of the toggle member so that the central portion 35 of the snap-acting member 36 is located between the actuating members 33 and 34.
  • the members 33 and 34 may be adjusted so that they contact opposite sides of the central portion 35.
  • the snap-acting element 36 is flxedly mounted at one of its ends to the bar 39 and has a movable contact 40 at its other end.
  • the movable contact 4) is shown facing a mating fixed contact 42 which is mounted on the bar 41. From Fig. 2 it is clear how the conductors 29 enter the housing through the insulated tubes 43 and 44, respectively.
  • Fig. l it can be seen that the recess 16 in one arm of the toggle member mates with a pointed plunger i8 connected to a disc 17 that is mounted on the membrane 20. It can be seen that the interior of the membrane is connected to the conduit 22 and it is apparent that the opposite end of the conduit 22 can be connected to a conventional temperature-responsive fluid container. Therefore, as the temperature of the fluid in this unillustrated uid container varies, the pressure exerted on the membrane 20 by the fluid varies in a predetermined manner. This causes the membrane to expand if the pressure increases or return to its unexpanded state if the pressure decreases.
  • a spring 24 Connected to the other arm of the double-armed toggle member, about the pin 26 thereof, is one end of a spring 24, the other end of which is connected to a lever 25 by means of a U-shaped bracket 27 and a screw 28.
  • a lever 25 It is self-evident how the cover 60 is xedly mounted in a groove 53 of the side wall 52 of the housing. The opposite interior end of the lever rests on the peripheral surface of a cam 30.
  • the cam 3i) is mounted on one end of a rotatable shaft Si which extends through the side wall 51 of the housing and is rotatably mounted within the housing on a supporting member 47 having a groove 58 adapted to receive the inner end of the lever 25.
  • the unillustrated end of the fluid conduit 22 is connected in the area whose temperature or pressure is to be controlled.
  • the shaft 31 is initially adjusted by knob 32 to provide the desired stress in the spring 24.
  • the pointed plunger 1S moves to the left as seen in Figs. l and 2, tending to straighten the bowed element 35.
  • the snap-acting element 36 snaps into its second position so that the central portion is bowed in the opposite direction, causing the movable contact 40 to mate with the fixed contact 42 and place the switch in circuit-closed condition. It is clear that when the contact 4t) mates with the contact 42, electrical connection is made between the first conductor 29, the bar 39, the snap-acting element 36, the bar 41, and the other conductor 29.
  • the contacts 46 and 42 will remain in their initial circuit-open condition until the snap action takes place. That is, the contacts are not continuously moved closer until they mate as is the case in a conventional switch arrangement. Therefore, there is no danger of voltage breakdown between the contacts before the predetermined position has been reached by the plunger 18.
  • the initial amount of rotation of the shaft 31 will determine the position of the cam 30 and in turn determine the initial force exerted by the spring 24 on the toggle member.
  • This force is exerted on one arm of the toggle member in the upwards direction to the left of the pin 12 as shown in Fig. l and tends to keep the contacts 4@ and 42 in circuit-open position. Therefore, the larger the force exerted by the spring 24, the larger will be the force required to be exerted by the plunger I8 on the other end of the toggle member. In turn, this will require a larger pressure increase within the membrane 20.
  • the pin 70 mounted on the cam 3i can be utilized.
  • Fig. l it can be seen that the pin 70 rotates about the same center of rotation as the cam 30. Therefore, if the cam Sil is rotated counterclockwise as viewed in Fig. l the pin 70 will move to the right and bear up against the wall 9 of the toggle member. This will prevent the toggle member from being pivoted to the left about its pin 12 and will keep the switch in circuit-open condition regardless of the movement of the plunger 18.
  • the described and illustrated switch arrangement is obviously light and compact and is capable of sustaining high current loads. It is particularly suitable for use in refrigerators and the like where the compressor unit must be energized and de-energized at certain time intervals depending on the temperature in a particular area of the refrigerator.
  • the pins 70 have the circuit-opening function described hereinabove in this instance for defrosting purposes.
  • a housing including a U-shaped member having two facing side walls each of said side walls having parallel edges with respective rounded portions each of said side walls being formed with diametrically opposite grooves therein, a third side wall having parallel edges with respective rounded portions to slidably cooperate with said rounded edges of said facing side walls, a fourth side wall mounted on said U-shaped member facing said third side wall, said fourth side wall having rounded parallel edges adapted to slidably cooperate with said facing side walls of said U-shaped member, and a cover having a plurality of flange portions, each of said flange portions cooperating with one of said side walls; a toggle member having two arms and being pivotally mounted on said U-shaped member of said housing at a point between said arms thereof and turnable between two positions; a switch member mounted in said diametrically opposite grooves of said facing side walls of said housing and being movable between open and closed conditions, said switch member being operatively associated with a toggle arm of said toggle member so as to
  • a housing including a U-shaped member having two facing side walls each of said side walls having parallel edges with respective rounded portions each of said side walls being formed with diametrically opposite grooves therein, a third side wall having parallel edges with respective rounded portions to slidably cooperate with said rounded edges of said facing side walls, a fourth side wall mounted on said U-shaped member facing said third side wall, said fourth side wall having rounded parallel edges adapted to slidably cooperate with said facing side walls of said U-Shaped member, and a cover having a plurality of liange portions, each of said Hange portions cooperating with one of said side walls; a toggle member having two arms and being pivotally mounted on said U-shaped member of said housing at a point between said arms thereof and turnable between two positions; a switch member mounted in said diametrically opposite grooves of said facing side walls of said housing and being movable between open and closed conditions, said switch member vbeing operatively associated with a toggle arm of said toggle member so as
  • a housing in combination, a housing; a flexible diaphragm mounted in one wall of said housing and having a pointed plunger; a double-armed bell crank lever pivotally mounted in said housing about an axis parallel to said diaphragm, one arm of said bell crank lever being bifurcated and having a recess therein; helical spring means mounted in said housing and arranged transversely to said plunger, said helical spring means engaging the second arm of said bell crank lever and permanently tending to turn said bifurcated arm towards said diaphragm and into engagement with said plunger; and a strip-like snap-acting switch member mounted in said housing within the recess of said bifurcated arm and adapted to be moved between operable positions thereof by said bifurcated arm.
  • a housing in combination, a housing; a flexible diaphragm mounted in one wall of said housing and having a pointed plunger; a double-armed bell crank lever pivotally mounted in said housing about an axis parallel to said diaphragm, one arm of said bell crank lever being bifurcated and having a recess therein; helical spring means mounted in said housing and arranged transversely to said plunger, said helical spring means engaging the second arm of said bell crank lever and permanently tending to turn said bifurcated arm towards said diaphragm and into engagement with said plunger; an electrically insulating yoke member xedly mounted between two opposite walls of said housing and traversing said recess of said bifurcated lever arm and a strip-like snap-acting switch member mounted in said electrically insulating yoke and adapted to be moved between operable positions thereof by said bifurcated arm.
  • a housing a switch actuating member pivotally mounted in said housing and turnable between two positions; a snap-acting switch member movable between open and closed positions and operatively connected to said switch actuating member so as to be moved by the same into one of said conditions when said switch actuating member is moved into lone of its said positions and to be moved into the other of its said conditions when said switch actuating member is moved into the other of its said positions; a flexible diaphragm mounted on a rst wall of said housing and adapted to be pressureactuated, said diaphragm having a portion thereof engaging said switch actuating member for turning the same from one of its said positions to the other of said positions thereof upon response to pressure actuation of said flexible diaphragm; spring means engaging said switch actuating member and permanently tending to turn the same towards one position thereof; a rotatable cam member mounted in a second wall of said housing perpendicular to said rst wall and extending through said

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Switches Operated By Changes In Physical Conditions (AREA)
  • Thermally Actuated Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Mechanisms For Operating Contacts (AREA)
US506248A 1954-05-29 1955-05-05 Electrical switch Expired - Lifetime US2810035A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEB31191A DE963347C (de) 1954-05-29 1954-05-29 Elektrische Schaltvorrichtung, insbesondere fuer Kuehlmaschinen

Publications (1)

Publication Number Publication Date
US2810035A true US2810035A (en) 1957-10-15

Family

ID=6963429

Family Applications (2)

Application Number Title Priority Date Filing Date
US3126461D Expired - Lifetime US3126461A (en) 1954-05-29 Electrical snap switch arrangement
US506248A Expired - Lifetime US2810035A (en) 1954-05-29 1955-05-05 Electrical switch

Family Applications Before (1)

Application Number Title Priority Date Filing Date
US3126461D Expired - Lifetime US3126461A (en) 1954-05-29 Electrical snap switch arrangement

Country Status (7)

Country Link
US (2) US2810035A (enrdf_load_stackoverflow)
BE (1) BE538486A (enrdf_load_stackoverflow)
CH (1) CH330289A (enrdf_load_stackoverflow)
DE (1) DE963347C (enrdf_load_stackoverflow)
DK (1) DK85952C (enrdf_load_stackoverflow)
FR (1) FR1123106A (enrdf_load_stackoverflow)
GB (2) GB773712A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1102240B (de) * 1960-07-13 1961-03-16 Marc Frachon Von aussen unabhaengig von seinem Stoessel einstellbarer elektrischer Schalter mit eingebautem Mikroschalter
US3126461A (en) * 1954-05-29 1964-03-24 Electrical snap switch arrangement

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1167943B (de) * 1959-12-12 1964-04-16 Siemens Ag Temperaturregler-Schaltvorrichtung
US3106623A (en) * 1961-12-15 1963-10-08 Vapor Corp Snap action differential actuator
DE3532055A1 (de) * 1985-09-09 1987-03-12 Teves Gmbh Alfred Schalter mit schlagartiger umschaltung
CN111627750B (zh) * 2020-07-30 2020-12-01 徐敏君 一种压力继电器

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1066215A (en) * 1910-05-31 1913-07-01 Chicago Fuse Mfg Company Electric box.
US1723635A (en) * 1927-05-16 1929-08-06 Fort Wayne Engineering & Mfg C Automatic pressure-controlled switch
US2013435A (en) * 1932-11-03 1935-09-03 Bosch Robert Control arrangement
US2044736A (en) * 1936-01-23 1936-06-16 Automatic Reclosing Circuit Br Control apparatus
US2200995A (en) * 1937-02-05 1940-05-14 Westinghouse Electric & Mfg Co Circuit controller
US2242769A (en) * 1938-02-17 1941-05-20 Gen Motors Corp Switch
US2354635A (en) * 1942-11-19 1944-07-25 Fred Burt Flasher switch
US2457023A (en) * 1948-06-11 1948-12-21 Gen Electric Encasing assembly
US2466522A (en) * 1943-08-06 1949-04-05 Robertshaw Fulton Controls Co Control device
US2598536A (en) * 1950-04-08 1952-05-27 Furnas Electric Co Fluid pressure actuated switch

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE483245C (de) * 1925-03-27 1929-10-01 Ernst Enna Verfahren und Vorrichtung zum Zusammenkleben von Kreppgummi mit anderen Stoffen auf mechanischem Wege
US2360723A (en) * 1941-03-27 1944-10-17 Square D Co Electric switch
BE538486A (enrdf_load_stackoverflow) * 1954-05-29
US2743331A (en) * 1955-01-21 1956-04-24 W L Maxson Corp Snap switch
US2901568A (en) * 1957-04-26 1959-08-25 Justin B Goff Snap-action switch

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1066215A (en) * 1910-05-31 1913-07-01 Chicago Fuse Mfg Company Electric box.
US1723635A (en) * 1927-05-16 1929-08-06 Fort Wayne Engineering & Mfg C Automatic pressure-controlled switch
US2013435A (en) * 1932-11-03 1935-09-03 Bosch Robert Control arrangement
US2044736A (en) * 1936-01-23 1936-06-16 Automatic Reclosing Circuit Br Control apparatus
US2200995A (en) * 1937-02-05 1940-05-14 Westinghouse Electric & Mfg Co Circuit controller
US2242769A (en) * 1938-02-17 1941-05-20 Gen Motors Corp Switch
US2354635A (en) * 1942-11-19 1944-07-25 Fred Burt Flasher switch
US2466522A (en) * 1943-08-06 1949-04-05 Robertshaw Fulton Controls Co Control device
US2457023A (en) * 1948-06-11 1948-12-21 Gen Electric Encasing assembly
US2598536A (en) * 1950-04-08 1952-05-27 Furnas Electric Co Fluid pressure actuated switch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126461A (en) * 1954-05-29 1964-03-24 Electrical snap switch arrangement
DE1102240B (de) * 1960-07-13 1961-03-16 Marc Frachon Von aussen unabhaengig von seinem Stoessel einstellbarer elektrischer Schalter mit eingebautem Mikroschalter

Also Published As

Publication number Publication date
CH330289A (de) 1958-05-31
DE963347C (de) 1957-05-09
GB868270A (en) 1961-05-17
BE538486A (enrdf_load_stackoverflow)
FR1123106A (fr) 1956-09-18
US3126461A (en) 1964-03-24
GB773712A (en) 1957-05-01
DK85952C (da) 1958-07-28

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