US2528756A - Toggle-lever switch - Google Patents

Toggle-lever switch Download PDF

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Publication number
US2528756A
US2528756A US760005A US76000547A US2528756A US 2528756 A US2528756 A US 2528756A US 760005 A US760005 A US 760005A US 76000547 A US76000547 A US 76000547A US 2528756 A US2528756 A US 2528756A
Authority
US
United States
Prior art keywords
toggle
spring
tongue
lever
contact
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
US760005A
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English (en)
Inventor
Kaser Albert
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.)
Landis and Gyr AG
Original Assignee
Landis and Gyr AG
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 Landis and Gyr AG filed Critical Landis and Gyr AG
Application granted granted Critical
Publication of US2528756A publication Critical patent/US2528756A/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
    • H01H5/00—Snap-action arrangements, i.e. in which during a single opening operation or a single closing operation energy is first stored and then released to produce or assist the contact movement
    • H01H5/04—Energy stored by deformation of elastic members
    • H01H5/18—Energy stored by deformation of elastic members by flexing of blade springs
    • 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
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18888—Reciprocating to or from oscillating
    • Y10T74/18896—Snap action
    • Y10T74/18904—Plate spring

Definitions

  • the invention relates to a toggle-lever switch and more particularly to a switch with a flexible spring which is moved to open and close a circuit.
  • the invention consists in the novel parts, constructions, arrangements, combinations and improvements herein shown and described.
  • Toggle-lever switches of the prior art have, as a principal defect, the fact that the entire force of urging pressure, between the moving contact and the stationary contact, is that of contact pressure, and, as a result, this contact pressure falls to zero immediately before switching movement occurs. If the switch is being thermostatically operated this condition may last an appreciable time, causing sparking at the contacts resulting in undesirable effects in the circuit, for example, radio interference. The burning of the contacts resulting from the sparking will lead to an alteration in the tumbler mechanism of the switch since the contacts themselves are the motion limitin stops. Another result of the existence of the sparking often is fusion of the contacts.
  • An object of the present invention is to provide a toggle-lever switch in which the contact pressure does not fall to zero immediately before switching movement occurs. Another object is to provide such a switch in which stops for limiting the motion of the toggle spring are independent of the contacts, and in which at least one switch contact is resiliently mounted.
  • Figure 2 is a view in elevation as in Figure 1 in which the contacts are in closed position;
  • FIG. 3 is a plan view of a toggle spring embodying this invention.
  • Figure 4 is a view in section taken along the line 4-4 of Figure 3.
  • I denotes a mounting plate, bent at right-angles to form a flange at one end shown in the right hand side of the figure, and is provided in front and rear, at the other end, with two extensions 2, only the rear one of which is shown in the drawing, the front one having been cut away for the sake of clarity.
  • One arm of a setting lever 3, of bell-crank type engages between the two extensions 2, whilst the other arm of said lever runs parallel with the mounting plate I.
  • the setting lever 3 is pivotally mounted on an axis 4, between the two extensions 2, and is provided with a set screw 5 at the right end of its horizontal arm.
  • Both the downwardly bent end of the mounting plate I and the vertical arm of the setting lever 3 are provided with knifeedge bearings 6 and 1 respectively, in which the corresponding knife-edges of a toggle spring 8 can be mounted.
  • the shape of this latter is best seen from the plan, Figure 3 and the crosssection in Figure 4. It is evident from Figure 3 that the right hand end of the toggle spring is very substantially stifiened, both longitudinally and transversely by two edges 9 and Ill-bent downwards at right angles and also by a downwardly pressed transverse rib II, whilst its left hand end formed by stamping out a portion I2 into a flexible contact tongue l3 and a knifeedge tongue I4 has no stiffening.
  • the tongue I3 is provided with a hole I5 to accommodate a contact member not shown in Figure 3.
  • the left hand end of the tongue I4 has a slightly curved knife-edge I6 which can be inserted into the bearing 6 on the setting lever 3.
  • the toggle spring On its right end, the toggle spring has two further knife edges I! and I8, which can be mounted in knifeedge bearings l in the plate I.
  • the bent edges 9 and I0 are provided at corresponding points with rounded extensions I9 and 20, respectively, Which-as can be seen in Figure 1-overlap the plate I laterally. It can also be seen from Figure 3 that an opening 2
  • Figure 4 represents a cross-section of the said toggle spring, the two turned-up edges 9 and I0 and the transverse rib II being clearly shown.
  • an adjustable screw stop 22 is provided in the plate I, its lower end having a groove 23, so that an upper abutment surface 24 and a lower one 25 are formed.
  • the screw 22 is mounted in the plate I, exactly opposite the opening 2I in the spring 8, and the two abutment surfaces 24 and 25 are respectively above and below the surfaces of the toggle lever.
  • in the spring 8 is such that, when the parts are being assembled, the head 26 resulting from the formation of the groove in the screw stop can be inserted without difllculty, whilst after assembly, the centre of the opening 2
  • the cross section of the grooved portion of the screw stop is indicated by 23!.
  • toggle-lever switch is represented in the off po sition, that is to say, the stiffened portion of the spring 8 bears on the lower abutment surface 25 of the screw 22 and the tongue I4 is bent downward to a considerable extent.
  • the resilient contact tongue l3 lies in the same plane as the stiffened portion of the toggle-lever spring.
  • the left end of the tongue I3 carries a riveted contact member 21, and at the same point bears lightly against an adjustable stop 28. Facing these, and on about the same level as the knife edges 6 and 1, is a second contact 29 which is also adjustable.
  • FIG. 2 shows the toggle spring in the switched-on" position, that is to say the stiffened portion of the spring 8 bears against the upper abutment surface 24 of the screw 22, and the tongue I4 is only very slightly depressed.
  • the tongue I3 is now bent slightly upwards since the contact 21 attached to it bears against the second contact 29.
  • the toggle-lever switch described can be perated in many ways. Th drawing shows. by way of example, the switch operated by a temperature sensitive plunger device of known type.
  • 39 denotes a flange which is secured to a casing-not further represented and carries a fixed plunger tube 3
  • a socalled basis rod of material with the lowest possible coeflicient of expansion Arranged in the usual manner, inside said tube, is a socalled basis rod of material with the lowest possible coeflicient of expansion, its lower end being firmly attached to the bottom end of the tube 3
  • the correct adjustment of the tension of the toggle spring can be effected by shifting the knife edge 6 in an approximately horizontal direction, by means of the set screw 5.
  • the toggle-lever switch When the tension of the spring has been correctly adjusted, the toggle-lever switch is in the "off position shown in Figure 1. If the temperature of the medium to be controlled falls, the basis rod 33 will move upwards and bring about elastic deformation of the spring I4, there- 'by setting up an external pressure against the I said contact pressure.
  • the electric circuit passes between the contacts 21 and 29, that is to say, the contact 29, the toggle spring 8 (together with the attached mount I and setting lever 3), and also the stop 28, may come under voltage. It is self-evident, therefore, that these parts should be electrically insulated from each other, and also from earth.
  • the upper portion 32 of the basis rod 33 must be designed as an insulated press stud which can be made, for example, of glass, steatite, etc.
  • the stop 28 may also be in the form of a contact, in which case, it is esesntial that it should be moved upwards, in Figure 1, sufficiently far for the spring I3 to be adequately stressed.
  • the above-described toggle-lever arrangement has, in common with the known arrangement operating only on one side of the dead point, the advantage that it is operated in only one direction, from outside, whereas, in the other direction, it functions automatically. Further advantages result from the circumstance that the tilting movement is restricted solely by the two abutment surfaces 24 and 25, that is to say, independently of any burning or wear of the contacts, so that alterations in the tumbler mechanism as the result of burned contacts, are reduced to a minimum. Furthermore, the mutual pressure between the contacts is fully maintained until the switching operation is performed. Thus, in contrast to the known toggle-lever switches, there is no diminution of the contact pressure prior to the tilting with resultant sparking, so that the device functions without radio interference.
  • the described toggle-lever switch is also highly sensitive, because, in the on position, the resulting impact force against the abutment surface 24 is diminished by the degree of the contact pressure-which is equivalent to a mechanical compensatin-so that, despite a contact pressure of, for example, 15 grams, a working stroke of, for example, only 0.02 mm., is needed to cause the snap action to occur. 7
  • a toggle lever switch comprising a toggle lever spring having a rigid portion, spaced pivot points, and a resilient tongue portion extending forwardly from said rigid portion and having its free edge mounted in the forward pivot point; an actuator for said spring located between said pivot points and acting upon said resilient tongue portion; switching contacts including spring mounted and normally stationary auxiliar contacts; and stops spaced rearwardly from said contacts for limiting the movement of said toggle spring in each direction.
  • a toggle lever switch comprising a toggle lever spring having a rigid portion, spaced pivot points, a resilient tongue portion extending from said rigid portion and having its free end mounted in the forward pivot points, a resilient arm portion extending from said rigid portion forwardly beyond said tongue portion; an actuator for said spring located between said pivot points for acting upon said resilient tongue portion; switch contacts including spring mounted and normally stationary auxiliary contacts, said spring mounted contact being positioned on said arm portion of said lever spring; and stops spaced rearwardly from said contacts for limiting the movement of said toggle springs in each direction.
  • a toggle lever switch comprising a toggle lever spring having a rigid portion, spaced pivot points, a resilient tongue portion extending from said rigid portion and having its free end mounted in the forward pivot points, a resilient arm portion extending from said rigid portion forwardly beyond said tongue portion, an actuator for said spring located between said pivot points for acting upon said resilient tongue portion; switch contacts including a contact mounted on said resilient arm portion, a normally stationary auxiliary contact, and a stop in vertical alignment with said auxiliary contact for limiting the movement of said contact mounted on said arm portion; and vertically aligned stops spaced rearwardly from said contacts for limiting the movement of said toggle springs in each direction.
  • ALBERT KASER ALBERT KASER.

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  • Mechanisms For Operating Contacts (AREA)
  • Knives (AREA)
US760005A 1946-07-23 1947-07-10 Toggle-lever switch Expired - Lifetime US2528756A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH627161X 1946-07-23

Publications (1)

Publication Number Publication Date
US2528756A true US2528756A (en) 1950-11-07

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ID=4524478

Family Applications (1)

Application Number Title Priority Date Filing Date
US760005A Expired - Lifetime US2528756A (en) 1946-07-23 1947-07-10 Toggle-lever switch

Country Status (6)

Country Link
US (1) US2528756A (xx)
BE (1) BE472705A (xx)
CH (1) CH251009A (xx)
DE (1) DE865329C (xx)
GB (1) GB627161A (xx)
NL (1) NL73820C (xx)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2695136A (en) * 1949-11-30 1954-11-23 Milwaukee Gas Specialty Co Snap-action device
US2707216A (en) * 1953-01-21 1955-04-26 Essex Wire Corp Bimetal blade
US2729715A (en) * 1952-08-23 1956-01-03 Broch Frederick John Snap action electrical switch
US2742543A (en) * 1951-07-07 1956-04-17 Clifford W Hurd Electrical contacting device
US2793271A (en) * 1954-03-24 1957-05-21 Muller C F Otto Thermo-bimetal instantaneous switch in particular for flash signal apparatus and luminescence lamps
US2809247A (en) * 1953-12-21 1957-10-08 Crabtree & Co Ltd J A Electric-snap-action switches
US2823283A (en) * 1956-04-11 1958-02-11 Wilcolater Company Snap-acting thermostat and bimetal blade therefor
US2864918A (en) * 1957-05-20 1958-12-16 Metals & Controls Corp Thermostat
US2916580A (en) * 1956-08-27 1959-12-08 Harold A Seele Electro-magnetic relay
US2964062A (en) * 1957-02-18 1960-12-13 Int Basic Economy Corp Pressure responsive device
US3090851A (en) * 1959-07-08 1963-05-21 Ideal Corp Flasher switch
DE1205191B (de) * 1961-11-25 1965-11-18 Siemens Ag Kontakteinrichtung fuer mehrphasige Bimetallrelais
US4142553A (en) * 1976-05-26 1979-03-06 Aisin Seiki Kabushiki Kaisha Electrothermally operated valve
FR2503444A1 (fr) * 1981-03-31 1982-10-08 Itt Interrupteur a rupture brusque
CH708894A1 (de) * 2013-11-26 2015-05-29 Werner Zumbrunn Sprungschalter mit konstanter Kontaktkraft.

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE552518A (xx) * 1955-11-19
US6399908B1 (en) 1997-04-09 2002-06-04 Marquardt Gmbh Electric switch

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1215665A (en) * 1915-04-05 1917-02-13 Heinrich Landis Spring arrangement especially for contact devices.
US1622721A (en) * 1925-12-07 1927-03-29 Arley U Hook Electric thermostatic switch
FR862910A (fr) * 1939-04-19 1941-03-19 Landis & Gyr Sa Interrupteur électrique comportant un organe de contact mobile, basculant légèrement sans être soumis à l'action d'un aimant
US2418831A (en) * 1943-12-09 1947-04-15 Photoswitch Inc Electric switch

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1960020A (en) * 1933-03-29 1934-05-22 Burgess Lab Inc C F Snap switch

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1215665A (en) * 1915-04-05 1917-02-13 Heinrich Landis Spring arrangement especially for contact devices.
US1622721A (en) * 1925-12-07 1927-03-29 Arley U Hook Electric thermostatic switch
FR862910A (fr) * 1939-04-19 1941-03-19 Landis & Gyr Sa Interrupteur électrique comportant un organe de contact mobile, basculant légèrement sans être soumis à l'action d'un aimant
US2418831A (en) * 1943-12-09 1947-04-15 Photoswitch Inc Electric switch

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2695136A (en) * 1949-11-30 1954-11-23 Milwaukee Gas Specialty Co Snap-action device
US2742543A (en) * 1951-07-07 1956-04-17 Clifford W Hurd Electrical contacting device
US2729715A (en) * 1952-08-23 1956-01-03 Broch Frederick John Snap action electrical switch
US2707216A (en) * 1953-01-21 1955-04-26 Essex Wire Corp Bimetal blade
US2809247A (en) * 1953-12-21 1957-10-08 Crabtree & Co Ltd J A Electric-snap-action switches
US2793271A (en) * 1954-03-24 1957-05-21 Muller C F Otto Thermo-bimetal instantaneous switch in particular for flash signal apparatus and luminescence lamps
US2823283A (en) * 1956-04-11 1958-02-11 Wilcolater Company Snap-acting thermostat and bimetal blade therefor
US2916580A (en) * 1956-08-27 1959-12-08 Harold A Seele Electro-magnetic relay
US2964062A (en) * 1957-02-18 1960-12-13 Int Basic Economy Corp Pressure responsive device
US2864918A (en) * 1957-05-20 1958-12-16 Metals & Controls Corp Thermostat
US3090851A (en) * 1959-07-08 1963-05-21 Ideal Corp Flasher switch
DE1205191B (de) * 1961-11-25 1965-11-18 Siemens Ag Kontakteinrichtung fuer mehrphasige Bimetallrelais
US4142553A (en) * 1976-05-26 1979-03-06 Aisin Seiki Kabushiki Kaisha Electrothermally operated valve
FR2503444A1 (fr) * 1981-03-31 1982-10-08 Itt Interrupteur a rupture brusque
CH708894A1 (de) * 2013-11-26 2015-05-29 Werner Zumbrunn Sprungschalter mit konstanter Kontaktkraft.

Also Published As

Publication number Publication date
GB627161A (en) 1949-07-29
DE865329C (de) 1953-02-02
CH251009A (de) 1947-09-30
NL73820C (xx)
BE472705A (xx)

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