US3858017A - Peripheral cam actuating a plurality of contact blades - Google Patents

Peripheral cam actuating a plurality of contact blades Download PDF

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Publication number
US3858017A
US3858017A US00420903A US42090373A US3858017A US 3858017 A US3858017 A US 3858017A US 00420903 A US00420903 A US 00420903A US 42090373 A US42090373 A US 42090373A US 3858017 A US3858017 A US 3858017A
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US
United States
Prior art keywords
electrical
carried
cam
spring contact
blade
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
US00420903A
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English (en)
Inventor
M Chioffi
M Bertozzi
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.)
Emerson Electric Co
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to BR601574A priority Critical patent/BR7406015D0/pt
Application granted granted Critical
Publication of US3858017A publication Critical patent/US3858017A/en
Assigned to EMERSON ELECTRIC CO. A CORP. OF MISSOURI reassignment EMERSON ELECTRIC CO. A CORP. OF MISSOURI ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: EMHART INDUSTRIES, INC. A CORP. OF CONNECTICUT
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
    • H01H43/00—Time or time-programme switches providing a choice of time-intervals for executing one or more switching actions and automatically terminating their operations after the programme is completed
    • H01H43/02—Details
    • H01H43/026—Contact arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
    • H01H19/60—Angularly-movable actuating part carrying no contacts
    • H01H19/62—Contacts actuated by radial cams

Definitions

  • a means for selectively completing a plurality of electrical circuits comprising a rotatable cam having at least four consecutive steps; at least four electrical terminals carried by an electrically insulative base in a line, spaced from and in line with the rotational direction of the cam; a first spring contact blade affixed at one end to a first electricalterminal at one end of the line, at least one electrical contact carried at a free end of the blade, and a cam follower carried between the fixed and free ends and responsive to the cam; a second spring contact blade affixed at one end to a second electrical terminal disposed next to the first electrical terminal; means carried by the base engaging a free end of the second spring contact blade to limit its travel; at least one electrical contact carried by the second spring contact blade between the fixed and free ends; a first
  • the present invention concerns an improvement in the arrangement of contacts and is particularly adoptable to cam driven electro-mechanical timers.
  • the timers commonly used for example, in electrical home appliances, such as clothes washers, dish washers and the like, include at least a small base or support of insulating material on which are mounted fixed or mobile contacts (contact springs) usually connected to current carriers in which the mobile contacts perform the electrical commutations to the fixed contacts under a mechanical drive supplied by rotating cams having a pre-fixed profile as a function of the desired commutation sequence.
  • the contact arrangements in timers of the described commonly used type are comprised of simple opening and closing contacts and/or exchange contacts.
  • the principal feature of the present invention is that of furnishing an improved contact arrangement for electro-mechanical contacts of the aforementioned type which enables the attainment of an additional contact closing (.and opening) in contrast to the well known type of arrangement.
  • FIG. 1 shows schematically the structure of the contact arrangement according to the present invention.
  • FIG. 2 shows a variation of the arrangement shown in FIG. 1.
  • a base 1 of insulating material sufficiently sturdy from a mechanical standpoint to maintain in place, the anchorings or electrical terminals 2, 3, 4, 5 spaced from cam 18 and substantially aligned directionally with its rotation.
  • Affixed to terminal 2 is a small metallic square 6 on which is carried an electrical contact pellet 7.
  • a first contact spring blade 8 arranged to exert force in the direction of the arrow F l, on the free end of which are carried electrical contact pellets 9, l0.
  • a second contact spring blade 11 arranged to exert force in the direction of the arrow F 2 and having a first electrical contact pellet 12 disposed in its center position with respect to its length, and a second electrical contact pellet 13 at its free end position.
  • the terminal end 14 of the spring 11 extends until coming into contact with the junction 15 in the small insulation base 1 to provide a means engaging the blade to limit its travel.
  • electrical contact pellet 16 is affixed to terminal 3.
  • the contact spring 8 is furnished, approximately in center position, with a tooth 17, the free end of which is arranged to engage the profile of rotating cam 18, shown only in part.
  • the cam 18 has four successive steps B, A, C, D, each defining four circumferences 20, 19, 21, and 22.
  • FIG. 2 is shown a variation of the FIG. 1 concept for the case in which a circuit closing between terminals 4 and 5 is not necessary or desired.
  • a spacer or insert 23 is mounted on spring 11 which, in correspondence with the rising of the tooth 17 controlled by zone D of the cam 18, controls the closing of contacts 12 and 16 and therefore the circuit between terminals 3 and 4.
  • the remainder of parts shown in FIG. 2 are identical to those in FIG. 1 and carry the same reference numbers.
  • Means selectively activating a plurality of electrical circuits comprising:
  • a first spring contact blade affixed at one end to a first electrical terminal at an end of said line, at least one electrical contact carried at a free end of said blade, and a cam follower carried between said fixed and free ends, said cam follower responsive to said cam,

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Connecting Device With Holders (AREA)
  • Electromechanical Clocks (AREA)
US00420903A 1973-07-12 1973-12-03 Peripheral cam actuating a plurality of contact blades Expired - Lifetime US3858017A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BR601574A BR7406015D0 (pt) 1973-12-03 1974-07-19 Dispositivo para acionar seletivamente uma pluralidade de interruptores eletricos

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT51427/73A IT991980B (it) 1973-07-12 1973-07-12 Perfezionamento nelle disposizioni di contatti per temporizzatori elet tromecca ioi con comando dei mede simi mediante camme

Publications (1)

Publication Number Publication Date
US3858017A true US3858017A (en) 1974-12-31

Family

ID=11275035

Family Applications (1)

Application Number Title Priority Date Filing Date
US00420903A Expired - Lifetime US3858017A (en) 1973-07-12 1973-12-03 Peripheral cam actuating a plurality of contact blades

Country Status (6)

Country Link
US (1) US3858017A (enrdf_load_stackoverflow)
JP (1) JPS5053881A (enrdf_load_stackoverflow)
DE (2) DE2362384A1 (enrdf_load_stackoverflow)
FR (1) FR2237299B1 (enrdf_load_stackoverflow)
GB (1) GB1471993A (enrdf_load_stackoverflow)
IT (1) IT991980B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4117286A (en) * 1975-06-13 1978-09-26 J. & J. Marquardt Electric switch
US4490768A (en) * 1979-03-16 1984-12-25 Jeco Co., Ltd. Apparatus for preventing arc discharge of transfer switch circuit for inductive load
US20110204725A1 (en) * 2010-02-24 2011-08-25 Adrian Shipley Electromagnetic circuit interrupter
CN103487072A (zh) * 2012-06-08 2014-01-01 博西华电器（江苏）有限公司 家用电器及其档位检测装置、灶具与抽油烟机的组合
US20140062626A1 (en) * 2012-08-31 2014-03-06 Fujitsu Component Limited Electromagnetic relay

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1053586B (it) * 1976-02-13 1981-10-10 Syntronic Ag Perfezionamento nei dispositivi elettrici di commutazione dei contatti di un temporizzatore

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2935591A (en) * 1958-06-23 1960-05-03 Westinghouse Electric Corp Electric oven control
US2938970A (en) * 1957-02-01 1960-05-31 Controls Co Of America Sequence timer
US3213217A (en) * 1960-11-22 1965-10-19 Holzer Walter Program delay control device
US3752944A (en) * 1971-11-01 1973-08-14 Controls Co Of America Timer blade arrangement

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1518704A (fr) * 1966-01-03 1968-03-29 Mallory Timers Continent Minuterie séquentielle dotée de plusieurs intervalles d'avance prédéterminés
DE1665978A1 (de) * 1967-02-25 1971-04-08 Siemens Elektrogeraete Gmbh Kontaktfederanordnung
BE729437A (enrdf_load_stackoverflow) * 1968-03-08 1969-09-08
JPS4837671A (enrdf_load_stackoverflow) * 1971-09-16 1973-06-02

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2938970A (en) * 1957-02-01 1960-05-31 Controls Co Of America Sequence timer
US2935591A (en) * 1958-06-23 1960-05-03 Westinghouse Electric Corp Electric oven control
US3213217A (en) * 1960-11-22 1965-10-19 Holzer Walter Program delay control device
US3752944A (en) * 1971-11-01 1973-08-14 Controls Co Of America Timer blade arrangement

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4117286A (en) * 1975-06-13 1978-09-26 J. & J. Marquardt Electric switch
US4490768A (en) * 1979-03-16 1984-12-25 Jeco Co., Ltd. Apparatus for preventing arc discharge of transfer switch circuit for inductive load
US20110204725A1 (en) * 2010-02-24 2011-08-25 Adrian Shipley Electromagnetic circuit interrupter
US8564389B2 (en) * 2010-05-24 2013-10-22 Ge Aviation Systems Limited Electromagnetic circuit interrupter
CN103487072A (zh) * 2012-06-08 2014-01-01 博西华电器（江苏）有限公司 家用电器及其档位检测装置、灶具与抽油烟机的组合
US20140062626A1 (en) * 2012-08-31 2014-03-06 Fujitsu Component Limited Electromagnetic relay
US9007155B2 (en) * 2012-08-31 2015-04-14 Fujitsu Component Limited Electromagnetic relay
US9293286B2 (en) * 2012-08-31 2016-03-22 Fujitsu Component Limited Electromagnetic relay

Also Published As

Publication number Publication date
GB1471993A (en) 1977-04-27
FR2237299A1 (enrdf_load_stackoverflow) 1975-02-07
FR2237299B1 (enrdf_load_stackoverflow) 1977-09-23
DE2362384A1 (de) 1975-01-30
IT991980B (it) 1975-08-30
JPS5053881A (enrdf_load_stackoverflow) 1975-05-13
DE7344433U (de) 1976-06-03

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Legal Events

Date Code Title Description
AS Assignment

Owner name: EMERSON ELECTRIC CO. A CORP. OF MISSOURI, MISSO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:EMHART INDUSTRIES, INC. A CORP. OF CONNECTICUT;REEL/FRAME:005691/0720

Effective date: 19910125