US2810026A - Electric switching devices - Google Patents

Electric switching devices Download PDF

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Publication number
US2810026A
US2810026A US395722A US39572253A US2810026A US 2810026 A US2810026 A US 2810026A US 395722 A US395722 A US 395722A US 39572253 A US39572253 A US 39572253A US 2810026 A US2810026 A US 2810026A
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US
United States
Prior art keywords
contact
spring
cantilever
springs
stationary
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
US395722A
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English (en)
Inventor
Vigren Sten Daniel
Broberg Walter Otto Wilhelm
Zander Rolf Albin
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Individual
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Individual
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Filing date
Publication date
Priority to BE520364D priority Critical patent/BE520364A/xx
Priority to FR1085886D priority patent/FR1085886A/fr
Application filed by Individual filed Critical Individual
Priority to US395722A priority patent/US2810026A/en
Application granted granted Critical
Publication of US2810026A publication Critical patent/US2810026A/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
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/56—Contact spring sets
    • H01H50/58—Driving arrangements structurally associated therewith; Mounting of driving arrangements on armature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/24—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting
    • H01H1/26—Contacts characterised by the manner in which co-operating contacts engage by abutting with resilient mounting with spring blade support
    • H01H1/28—Assembly of three or more contact-supporting spring blades

Definitions

  • Electric switches are known in which the actual contact or contacts of a movable contact carrying member is or are respectively resiliently movable with relation to the Contact carrying member, e. g. supported by a relatively thin, flexible tongue fixed to the said member and and deviating in the open position of the switch towards the fixed contact member or members of the device.
  • the object of the present invention is to provide a switching device having means for eliminating contact vibrations operating according to the general principle outlined above but arranged in such a way that no appreciable increase of the required space or length of operating movement is caused thereby.
  • the contact carrying device and means for eliminating contact vibrations are kept away by an operating member when they are in positions where they are not in contact with their associate countercontact member or members respectively.
  • Figure 1 shows a Contact spring forming part of a switching device according to the invention in side view
  • Figure 2 shows the same contact spring in plan view
  • Figure 3 shows a Contact spring assembly as an eX- ample of a switching device according to the invention in elevation, having movable contact springs as shown in Figures 1 and 2;
  • Figure 4 shows the same contact spring assembly in top view.
  • the movable contact spring shown in Figures 1 and 2 consists of a contact carrying member in the shape of a leaf spring 1 and a conductive, flexible tongue 2, which may be welded or riveted to the spring 1.
  • the tongue 2 is slitted in its longitudinal direction so that two separately resilient portions having twin contacts 3 thereon are formed. It is also possible to make the flexible tongue 2 of contact material, such as silver or other suitable material, so that special contact bodies or points may be dispensed with.
  • the tongue 2 is preferably materially thinner than the spring 1 and it is attached to the latter, at its one end only, a suitable distance from the end of the spring 1, so that the extreme portion of the latter forms a backstop or support for the tongue adjacent to its contact portion in operated position as will be more closely described below.
  • the tongue 2 is pretensioned so as to tend to flex out from the spring 1 as shown in Figure 1.
  • the contact spring assembly illustrated in Figures 3 and 4 comprises two movable Contact springs 4 and 5, of the type described above with reference to Figures 1 and 2, and two stationary contact springs 6 and 7 carrying countercontacts for cooperation with the contacts of the movable contact springs 4 and 5 respectively.
  • the movable contact springs are controlled by an operating member 8 which is vertically slidable inasmuch as it is slidably guided at its lower end in an aperture in a guiding strip 9 and at its upper end is engaged by a combined pressing and guiding spring 10, which spring has an aperture in which the top portion of member 8 fits.
  • the stationary contact springs rest against supporting surfaces on a supporting stud 11, whereby they have their contact ends located on predetermined levels. All the contact springs are insulated from each other by means of insulating spacers 13 and the contact spring assembly is clamped between a washer 14 and a base plate 12 by means of screws 15.
  • the contact spring assembly shown contains one break contact function formed by springs 4 and 6 and one make Contact function formed by springs 5 and 7.
  • the springs 4 and 5 are both pretensioned so as to tend to move their contact ends towards the corresponding countercontacts on the stationary springs 6 and 7 respectively and, when out of engagement with the operating member 8, to abut with their contacts 3 against the associated countercontacts on the stationary springs with a predetermined contact pressure.
  • the tongue 2 is then pressed against the end portion of its associate movable Contact spring 4 or 5 respectively. ln order that the tongue 2 may be completely flattened on the surface of the associate movable spring it will be understood, that its spring tension must be so chosen that the pressure required for pressing it against the underlying spring is at most equal to and preferably less than the contact pressure caused by the pretension of the associate movable Contact spring.
  • the operating member 8 is provided with teeth 16 and 17 for the actuation of the movable contact springs 4 and 5 respectively. These teeth have lateral surfaces for the engagement with the ends of the movable contact springs.
  • the operating member 8 When the switching device is operated the operating member 8 is displaced upwardly, for example by means of a relay armature or the like acting on the lower end of the operating member 8.
  • the movable spring will then be permitted to move through its spring tension towards the stationary spring 7, and the operating member 8 is displaced by a distance great enough to ensure that the tooth 17 comes out of engagement with spring 5 so that the contacts of the two springs are pressed together and these springs will take up the same position relative each other as springs 4 and 6 in the shown non-operated condition.
  • spring 5 At the moment that the contacts of the movable contact spring 5 hit countercontacts of the stationary contact spring 7 either spring 5 may bounce back again or spring 7 may be pushed up or both such movement may occur, so that a tendency of contact vibrations arises.
  • Due to the upwardly directed spring tension of the tongue 2 however, the latter will ensure that the contacts are closed even though the springs 5 and 7 vibrate or bounce in relation to each other.
  • a switching device comprising: a base structure; a stationary contact member on said base structure; a rst cantilever spring supported on said base structure and extending from its supported section with its free end in proximity to said stationary contact member; a second cantilever contact spring attached at one end to said first cantilever with its other free end adjacent said stationary contact member; said first cantilever spring being pretensioned so that it is biased towards said stationary contact member to normally press said second cantilever spring against the stationary contact, and said second cantilever contact spring being pretensioned to flex away from said lfirst spring towards said stationary contact member when unrestrained so that it tends to maintain contact therewith when the first spring is spaced therefrom; and operating means to displace said first and second cantilever springs away from said stationary contact member to disrupt contact therebetween.
  • a switching device comprising: a base structure; a stationary contact member on said base structure; a first cantilever leaf spring supported at one end on said base structure with its other free end in proximity to said stationary contact member; a second cantilever leaf spring attached at one end to said first cantilever spring on the side thereof disposed towards said stationary contact member with its other end adjacent said stationary contact member; said second cantilever leaf spring being pretensioned to flex away from said first cantilever leaf spring towards said stationary contact member when unrestrained so that it tends to maintain contact with said stationary contact; and operating means to displace said first and second movable contact members away from said stationary contact to disrupt contact therebetween.
  • a switching device comprising: a stationary contact member; a first cantilever supported leaf spring having its free end in proximity to said stationary contact member; a second cantilever leaf spring attached at one end to said first cantilever spring on the side thereof disposed towards the stationary contact member, with its other free end adjacent said stationary contact member; said first cantilever spring being pretensioned so that it is biased towards the stationary contact member to normally press said second cantilever spring against said contact member, and said second cantilever spring being pretensioned to flex away from said first cantilever spring towards said stationary contact member when unrestrained so that it tends to maintain engagement with said stationary contact when the first spring is spaced therefrom; and an operating means for engaging the free end of said second cantilever spring to displace said first and second cantilever springs from said stationary contact member to disrupt contact therebetween, said operating member operating on the first cantilever spring through said second cantilever spring.
  • a switching device comprising: a base structure; a stationary contact member on said base structure; a first cantilever leaf spring supported at one end on said base structure with its other free end in proximity to said stationary contact member; a second cantilever leaf spring attached at one end to said first cantilever spring on the side thereof disposed towards the stationary contact member with its other free end adjacent said stationary contact member; said first cantilever spring being pretensioned so that it is biased towards said stationary contact member to normally press said second cantilever spring against it and said second cantilever spring being pretensioned to flex away from said first cantilever spring towards said stationary contact member when unrestrained with a force less than the pressure exerted on it by said first cantilever spring; and operating means to displace said first and second movable leaf springs away from said stationary contact to disrupt contact between it and said second spring.
  • a switching device comprising: a base structure; a relatively rigid cantilever leaf spring supported on said base structure with a relatively stationary contact part adjacent its free end; a second cantilever leaf spring supported at one end on said base structure in opposed relation to said first spring with its other free end in proximity to said stationary contact part; a third cantilever leaf spring lattached at one end to said second cantilever spring on the side thereof disposed towards the rst spring with its other free end adjacent to said stationary contact member, said second leaf spring being pretensioned so that it is biased towards said first spring to normally press said third cantilever spring against said stationary Contact part, and said third cantilever spring being pretensioned to iiex away from said second cantilever spring towards said stationary contact part when unrestrained with a force less than the pressure exerted on it by the said rst cantilever spring; and an operating member for engaging the free end of said third cantilever spring to move said third and second cantilever springs away from said stationary contact part to disrupt contact therebetween, with said
  • An electric switch comprising: a base structure; a first relatively xed contact member on said base structure; a carrying member supported on said base structure for movement towards and away from said first Contact member; a second contact member supported on said carrying member in engageable relation to said irst contact member with said second contact member movable relative to the carrying member, and said carrying member having a stop surface thereon engageable by said second contact member; said carrying member being biased to press said second contact member against said iirst contact member when said stop surface engages the second contact member, and said second contact member being biased to tend to move out of engagement with said stop surface on the carrying member towards said first contact member, with the bias on said second contact member being of less force than the bias on said carrying member; and operating means for moving said second contact member away from said rst contact member to disrupt contact therebetween.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Push-Button Switches (AREA)
US395722A 1953-12-02 1953-12-02 Electric switching devices Expired - Lifetime US2810026A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE520364D BE520364A (enrdf_load_stackoverflow) 1953-12-02 1953-06-01
FR1085886D FR1085886A (enrdf_load_stackoverflow) 1953-12-02 1953-06-02
US395722A US2810026A (en) 1953-12-02 1953-12-02 Electric switching devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US395722A US2810026A (en) 1953-12-02 1953-12-02 Electric switching devices

Publications (1)

Publication Number Publication Date
US2810026A true US2810026A (en) 1957-10-15

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ID=23564215

Family Applications (1)

Application Number Title Priority Date Filing Date
US395722A Expired - Lifetime US2810026A (en) 1953-12-02 1953-12-02 Electric switching devices

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US (1) US2810026A (enrdf_load_stackoverflow)
BE (1) BE520364A (enrdf_load_stackoverflow)
FR (1) FR1085886A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3238324A (en) * 1962-11-19 1966-03-01 Jennings Radio Mfg Corp Miniature hermetically sealed relay
US3790733A (en) * 1972-11-03 1974-02-05 Bell Telephone Labor Inc Contact spring and switch construction
US4875350A (en) * 1988-08-04 1989-10-24 Abc Auto Alarms, Inc. Push lock actuable anti-theft vehicle device

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1879349A (en) * 1930-04-03 1932-09-27 Weston Electrical Instr Corp Relay contact
DE603150C (de) * 1932-11-03 1934-09-24 Wilh Quante Fa Kleinhebelschalter
US2115836A (en) * 1934-10-06 1938-05-03 Bell Telephone Labor Inc Electromagnetic switching device
US2178151A (en) * 1937-09-22 1939-10-31 Bell Telephone Labor Inc Relay contact spring
US2199508A (en) * 1939-11-16 1940-05-07 Radiart Corp Vibrator
US2271813A (en) * 1939-12-13 1942-02-03 Jr John Edward Clayton Thermostatic break and make control
US2416736A (en) * 1943-10-21 1947-03-04 Buckley Eric Sydney Electrical circuit making and breaking devices
US2472709A (en) * 1947-02-06 1949-06-07 Bell Telephone Labor Inc Control of electrical contacting elements
US2519731A (en) * 1946-06-14 1950-08-22 Mallory & Co Inc P R Contact arrangement for vibrators
US2616993A (en) * 1947-07-17 1952-11-04 Bell Telephone Labor Inc Pretensioned spring

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1879349A (en) * 1930-04-03 1932-09-27 Weston Electrical Instr Corp Relay contact
DE603150C (de) * 1932-11-03 1934-09-24 Wilh Quante Fa Kleinhebelschalter
US2115836A (en) * 1934-10-06 1938-05-03 Bell Telephone Labor Inc Electromagnetic switching device
US2178151A (en) * 1937-09-22 1939-10-31 Bell Telephone Labor Inc Relay contact spring
US2199508A (en) * 1939-11-16 1940-05-07 Radiart Corp Vibrator
US2271813A (en) * 1939-12-13 1942-02-03 Jr John Edward Clayton Thermostatic break and make control
US2416736A (en) * 1943-10-21 1947-03-04 Buckley Eric Sydney Electrical circuit making and breaking devices
US2519731A (en) * 1946-06-14 1950-08-22 Mallory & Co Inc P R Contact arrangement for vibrators
US2472709A (en) * 1947-02-06 1949-06-07 Bell Telephone Labor Inc Control of electrical contacting elements
US2616993A (en) * 1947-07-17 1952-11-04 Bell Telephone Labor Inc Pretensioned spring

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3238324A (en) * 1962-11-19 1966-03-01 Jennings Radio Mfg Corp Miniature hermetically sealed relay
US3790733A (en) * 1972-11-03 1974-02-05 Bell Telephone Labor Inc Contact spring and switch construction
US4875350A (en) * 1988-08-04 1989-10-24 Abc Auto Alarms, Inc. Push lock actuable anti-theft vehicle device

Also Published As

Publication number Publication date
BE520364A (enrdf_load_stackoverflow) 1955-06-10
FR1085886A (enrdf_load_stackoverflow) 1955-02-08

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