US2535090A - Snap spring operated switch - Google Patents

Snap spring operated switch Download PDF

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Publication number
US2535090A
US2535090A US732307A US73230747A US2535090A US 2535090 A US2535090 A US 2535090A US 732307 A US732307 A US 732307A US 73230747 A US73230747 A US 73230747A US 2535090 A US2535090 A US 2535090A
Authority
US
United States
Prior art keywords
contacts
spring
fixed
solenoid
snap spring
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
US732307A
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English (en)
Inventor
Joseph F O'brien
Earl S Boynton
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.)
John B Pierce Foundation
Original Assignee
John B Pierce Foundation
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
Priority claimed from US508298A external-priority patent/US2417438A/en
Priority to GB20846/48A priority Critical patent/GB644848A/en
Application filed by John B Pierce Foundation filed Critical John B Pierce Foundation
Priority to US732307A priority patent/US2535090A/en
Priority to FR973894D priority patent/FR973894A/fr
Application granted granted Critical
Publication of US2535090A publication Critical patent/US2535090A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/02—Non-polarised relays
    • H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
    • H01H51/06—Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity
    • H01H51/065—Relays having a pair of normally open contacts rigidly fixed to a magnetic core movable along the axis of a solenoid, e.g. relays for starting automobiles
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/02—Non-polarised relays
    • H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
    • H01H51/12—Armature is movable between two limit positions of rest and is moved in both directions due to the energisation of one or the other of two electromagnets without the storage of energy to effect the return movement

Definitions

  • invention relates to electromagnetic electromagnetic switch, the relative position of the snap spring and the solenoid operator being disposed within the casing in a pie-established dimensional arrangement to insure accuracy of operation.
  • the improved electromagnetic switch comprises an organization of fixed and movable contacts, the movable contacts being brought into or out of engagement with the fixed contacts by solenoid actuators, operating through the agency of a spring.
  • a plurality of side frame members Secured to the base of the housing of the electromagnetic switch, on which base the fixed contacts are positioned, are a plurality of side frame members, said members having at a pre-determined location with respect to the base structure, means to receive and position a sub-base which serves as the support for the operating elements of the electromagnetic switch.
  • a snap spring retainer and a soleno d actuator comprising a of individual solenoid cups between which, and in engagement with the rims thereof are located a pair of spacer members having inner peripheral flanges which collectively provide a cylindrical chamber within which a solenoid core is slidably positioned.
  • the respective solenoid once, within which the operating solenoids are contained, are in stacked relationshi one with the other, and may be inserted within the side frame members by being successively placed therein by the workman.
  • each of said side frame members Near the outer end of each of said side frame members is an aperture ada ted to receive the tongue of a rigid bridge which overlie the outermost solenoid cup in spaced relationship therewith.
  • Said bridge member has any desired plurality of tapped openings which receive set screws or the like, the ends of which bear against the top wall of the outermost solenoid cup. U on tightening the set screws the respective operating elements are urged one against the other, and in tight relationship with the sub-base which forms the sup ort for the collective operating members.
  • the bridge member also aiTords means of securing an outer casing and a too closure plate to complete the housing of the device.
  • the movable contacts are carried by a flexible plate operatively associated with the magnetic armature whereby the movable contacts are resi iently supported in a manner afiording selfadjustability with respect to the fixed contacts.
  • the flexible disc carrying the movable contacts gives under the impact of the movable contacts against the fixed contacts thereby cushioning the same and dampening chatter during the making of the contacts, resulting in improved circuit closing characteristics and enhancing the life of the respective contacts.
  • a feature of our invention is an improved assembly structure for an electromagnetic switch.
  • a feature of our invention is an improved contact organization for an electromagnetic switch.
  • Fig. l is a sectional 'view of a preferred form of netic switchembodying the present invention
  • Fig. 2 is a central sectional view taken on line 2-2 of Fig. 1;
  • Fig. 3 is a sectional view taken on line 3-3 of Fig. 1.;
  • Fig. 4 is a sectional view taken on line 44 of Fig. 1.;
  • Fig. 5 is another sectional elevation of the device, in closed circuit position, the line of section being on the line 5-5 of Fig. 1;
  • Fig. 6 is an exploded perspective view of the structure.
  • Fig. 7 is a side elevation, partly broken away, of the assembled structure, with the outer casing broken away to illustrate the positioning of the parts; Fig. 7 shows a typical wiring diagram.
  • the housing of our improved electromagnetic switch l8 includes a base plate ii, shell 52 and cap [4; these parts are of insulating material.
  • a base plate ii Secured to the base plate i I, as by any desired plurality of screws or rivets, is an open frame comprising side pieces i5, 5 5 within which the operating elements of the electromagnetic switch are contained and secured.
  • each frame member at a location suitably above the base has a pair of ears H, H struck inwardly in a common plane; upon said ears rests a plate 18 which serves as a base for the solenoid and snap spring mounting structure, as later described.
  • Legs IS of said base E8 extend downwardly between and in engagement with the side edges of the spaced ears [1, I! of the respective side frame members, and plate IB is thereby held against rotation without the necessity of welding or like means.
  • a second solenoid cup 2'! houses a solenoid 28; between the solenoid cups 25 and 2'! are a pair of flanged spacer members 29, 35, the outer flanges 31, 32 of which fit snugly between and in contact with the frame side-pieces l5, l6, and the inner cylindrical flanges 33, 34 provide a guide sleeve for a magnetic armature 35, axially slidable therein.
  • a pole-piece 35, 3? To each of the solenoid cups 25, 27 is attached a pole-piece 35, 3?, the axial passage of the latter being concentric with respect to the cylindrical flanges 33, 34, to permit the guided slidable passage of the actuator rod 38, secured to armature 35.
  • the respective solenoid cups 25 and 21, ring members 29, 39, and pole-pieces 35, 31 are preferably of steel or other magnetic material.
  • the bridge also serves to hold the cap l4 and casing 2 in position, by the screw 42.
  • Snap spring 24 has an opening through its center to receive the reduced diameter, threaded, end of the actuator rod 38, which is secured to a rectangular block 123 of insulation material, the latter passing through the square central opening in plate 53.
  • the Walls 26, 20 act as bearing guides for the block 43.
  • the rivets 45 are at a spacing of with respect to the contacts 4?, 41.
  • Such arrangement affords a substantial measure of self-adjustability of contacts 41 with respect to contacts 138, 58, while providing an otherwise rigid supporting structure for said contacts 47.
  • the respective solenoids 26 and 28 are connected into a common circuit for remote control by a momentary-contact switch S, through the illustrated terminals on cap 24.
  • the contacts 41, 18 are in the circuit to be controlled.
  • the solenoid coils may or may not be wound for low voltage actuation, according to preference.
  • solenoid 26 drives the armature to the right as shown in Fig. 5, thereby causing the snap spring 24 to throw into its second position of stable equilibrium as is shown in said figure and bringing the contacts 4'! into engagement with the terminal contacts
  • the block 133 forms a member centrally connecting the snap spring 25 and the flat spring 45.
  • the spring 44 flexes under the impact of the contacts, acting to dampen the engagement of the said contacts and preventing rebound. Desirably, the engagement of the respective contacts is prior to the attainment of full throw position of the snap spring, whereupon said snap spring acts continually to exert a yielding pressure against the spring 3 and in turn against the fixed contacts.
  • movable contacts For bridging the fixed contacts of an open electrical circuit, movable contacts disposed adjacent the fixed contacts for movement thereagainst, a metallic contact bridge carrying said movable contacts, and means for moving said movable contacts into engagement with the fixed contacts of the circuit, said means comprising a rim-confined snap spring, a fiat spring spaced apart from and fixed to said contact bridge at points thereon spaced an-gularly from said movable contacts, and a rigid member centrally connecting said snap spring centrally with said fiat spring, whereby said movable contacts will have u a substantial measure of self-adjustability in their engagement with the fixed contacts, and whereby engagement of said movable contacts with said fixed contacts will be dampened by the resiliency of said fiat spring.
  • movable contacts For bridging the fixed contacts of an open electrical circuit, movable contacts disposed adjacent the fixed contacts for movement thereagainst, a metallic contact bridge carrying said movable contacts diametrically spaced thereon, and means for moving said movable contacts into engagement with the fixed contacts of the circuit, said means comprising a rim-confined snap spring, a fiat spring spaced apart from and fixed to said contact bridge at points thereon spaced substantially ninety degrees from said movable contacts, and a rigid member centrally connecting said snap spring centrally with said fiat spring, whereby said movable contacts will have a substantial measure of self-adjustability in their engagement with the fixed contacts, and whereby engagement of said movable contacts with said fixed contacts will be dampened by the resiliency of said fiat spring.
  • movable contacts For bridging the fixed contacts of an open electrical circuit, movable contacts disposed adjacent the fixed contacts for movement thereagainst, a metallic contact bridge carrying said movable contacts diametrically spaced thereon, and means for moving said movable contacts into engagement with the fixed contacts of the circuit, said means comprising a rim-confined snap spring, a fiat spring spaced apart from and fixed to said contact bridge at points thereon spaced angularly from said movable contacts, a rigid member centrally connecting said snap spring centrally with said flat spring, and a guide for maintaining said movable contacts in an axial alignment with th fixed contacts of the electrical circuit, whereby said movable contacts will have a substantial measure of self-adjustability in their engagement with the fixed contacts, and whereby engagement of said movabl contacts with said fixed contacts will be dampened by the resiliency of said fiat spring.
  • a bridging contact member for making and breaking an electrical circuit through open fixed contacts thereof, said member comprising movable contacts adjacent the fixed circuit contacts, a metallic bridge carrying said movable contacts, and means supporting said bridge for movement toward and away from the fixed circuit contacts, said means comprising a flat spring spaced apart from and fixed to said bridge at points spaced substantially ninety degrees from said movable contacts, and a rim-confined snap spring spaced from and rigidly connected to said flat spring centrally of said snap spring and said flat spring, whereby said movable contacts may be snapped into self-adjustable, dampened resilient engagement with the fixed circuit contacts.
  • a bridging contact member for making and breaking an electrical circuit through open fixed contacts thereof, said member comprising movable contacts adjacent the fixed circuit contacts, a metallic bridge carrying said movable contacts, and means sup-porting said bridge for movement toward away from the fixed circuit contacts, said means comprising a fiat spring spaced apart from and fixed to said bridge at points spaced substantially ninet degrees from said movable contacts, a rim-confined snap spring spaced from and rigidly connected to said fiat spring centrally of said snap spring and said fiat spring, and a guide for maintaining said movable contacts in axial alignment with the fixed contacts of the electrical circuit, whereby said movable contacts may be snapped into self-adjustable, dampened resilient engagement with the fixed circuit contacts.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Push-Button Switches (AREA)
  • Electromagnets (AREA)
US732307A 1943-10-30 1947-03-04 Snap spring operated switch Expired - Lifetime US2535090A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB20846/48A GB644848A (en) 1943-10-30 1944-10-09 Electromagnetic switches
US732307A US2535090A (en) 1943-10-30 1947-03-04 Snap spring operated switch
FR973894D FR973894A (fr) 1943-10-30 1948-10-21 Perfectionnements apportés aux conjoncteurs-disjoncteurs électromagnétiques

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US508298A US2417438A (en) 1943-10-30 1943-10-30 Electromagnetic switch
US732307A US2535090A (en) 1943-10-30 1947-03-04 Snap spring operated switch

Publications (1)

Publication Number Publication Date
US2535090A true US2535090A (en) 1950-12-26

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ID=27056144

Family Applications (1)

Application Number Title Priority Date Filing Date
US732307A Expired - Lifetime US2535090A (en) 1943-10-30 1947-03-04 Snap spring operated switch

Country Status (3)

Country Link
US (1) US2535090A (fr)
FR (1) FR973894A (fr)
GB (1) GB644848A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4488020A (en) * 1983-02-23 1984-12-11 Eaton Corporation Miniature multi-pole double-throw snap-action pushbutton switch with alpha-numeric display

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE520512A (fr) * 1952-07-28

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US363250A (en) * 1887-05-17 System of electrical distribution for railways
US803486A (en) * 1904-06-18 1905-10-31 Gen Electric Magnetically-operated switch.
US883059A (en) * 1902-02-07 1908-03-24 Cutler Hammer Mfg Co Electrically-operated switch.
US1238667A (en) * 1915-06-26 1917-08-28 North East Electric Co Electric-circuit controller.
US1319880A (en) * 1919-10-28 Electbic-cubjeueot-contbolliira device
US1817155A (en) * 1926-07-17 1931-08-04 Leece Neville Co Electric switch
US1861641A (en) * 1930-11-17 1932-06-07 Union Switch & Signal Co Contact device
US2103378A (en) * 1933-08-24 1937-12-28 American Gasaccumulator Co Time delay apparatus
US2230770A (en) * 1939-12-09 1941-02-04 Cons Car Heating Co Inc Circuit controller
US2335888A (en) * 1942-03-12 1943-12-07 Pierce John B Foundation Overload protective electromagnetic switch
US2355951A (en) * 1942-01-19 1944-08-15 Heineken & Coffeen Snap switch
US2368193A (en) * 1942-12-10 1945-01-30 Pierce John B Foundation Snap spring
US2391238A (en) * 1943-03-27 1945-12-18 Allicd Control Company Inc Snap switch
US2415448A (en) * 1942-06-05 1947-02-11 Pierce John B Foundation Snap switch

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US363250A (en) * 1887-05-17 System of electrical distribution for railways
US1319880A (en) * 1919-10-28 Electbic-cubjeueot-contbolliira device
US883059A (en) * 1902-02-07 1908-03-24 Cutler Hammer Mfg Co Electrically-operated switch.
US803486A (en) * 1904-06-18 1905-10-31 Gen Electric Magnetically-operated switch.
US1238667A (en) * 1915-06-26 1917-08-28 North East Electric Co Electric-circuit controller.
US1817155A (en) * 1926-07-17 1931-08-04 Leece Neville Co Electric switch
US1861641A (en) * 1930-11-17 1932-06-07 Union Switch & Signal Co Contact device
US2103378A (en) * 1933-08-24 1937-12-28 American Gasaccumulator Co Time delay apparatus
US2230770A (en) * 1939-12-09 1941-02-04 Cons Car Heating Co Inc Circuit controller
US2355951A (en) * 1942-01-19 1944-08-15 Heineken & Coffeen Snap switch
US2335888A (en) * 1942-03-12 1943-12-07 Pierce John B Foundation Overload protective electromagnetic switch
US2415448A (en) * 1942-06-05 1947-02-11 Pierce John B Foundation Snap switch
US2368193A (en) * 1942-12-10 1945-01-30 Pierce John B Foundation Snap spring
US2391238A (en) * 1943-03-27 1945-12-18 Allicd Control Company Inc Snap switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4488020A (en) * 1983-02-23 1984-12-11 Eaton Corporation Miniature multi-pole double-throw snap-action pushbutton switch with alpha-numeric display

Also Published As

Publication number Publication date
GB644848A (en) 1950-10-18
FR973894A (fr) 1951-02-15

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