US3392252A - Momentary switch having normally engaged contacts actuated by a conductive member - Google Patents

Momentary switch having normally engaged contacts actuated by a conductive member Download PDF

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Publication number
US3392252A
US3392252A US570206A US57020666A US3392252A US 3392252 A US3392252 A US 3392252A US 570206 A US570206 A US 570206A US 57020666 A US57020666 A US 57020666A US 3392252 A US3392252 A US 3392252A
Authority
US
United States
Prior art keywords
contacts
switch
blade
normally engaged
conductive 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
US570206A
Other languages
English (en)
Inventor
Philip N Crawford
Walter E Taylor
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.)
Eastman Kodak Co
Original Assignee
Eastman Kodak Co
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 to CA814019A priority Critical patent/CA814019A/en
Application filed by Eastman Kodak Co filed Critical Eastman Kodak Co
Priority to US570206A priority patent/US3392252A/en
Priority to JP4345767A priority patent/JPS4418771B1/ja
Priority to GB33908/67A priority patent/GB1131999A/en
Priority to DE19671640043D priority patent/DE1640043B1/de
Priority to FR116884A priority patent/FR1533649A/fr
Application granted granted Critical
Publication of US3392252A publication Critical patent/US3392252A/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
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
    • H01H13/506—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member with a make-break action in a single operation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member

Definitions

  • a momentary break switch has normally engaged contacts which, upon actuation of a push button, are urged apart by a blade member of electrically conducting material. The electrical path between the contacts is maintained by the blade member until it passes from between the contacts, then allowing the contacts to spring together but interrupting the electrical path there-between prior to their re-engagment for a substantially uniform increment of time, regardless of the rate of actuation of the push button.
  • This invention relates to an electrical switch mech anism and more particularly to an electrical switch which is normally closed but is opened momentarily upon de pression of an associated push button.
  • FIG. 1 is an isometric view of an electrical switch incorporating the elements of the invention disclosed herein;
  • FIGS. 2, 3, 4, and are schematic illustrations showing positions assumed by certain elements of the device of FIG. 1 during various stages in the operation thereof.
  • a base plate 10 is shown in phantom.
  • a hollow circular guide member 11 open at the upper end thereof and closed at its bottom.
  • Guide member 11 is constructed of plastic or any other non-conductive material.
  • Reciprocatably mounted in guide member 11 for sliding movement therein is a circular base member 12 having a control button 13 projecting therefrom.
  • circular base member 12 has a hollow recess disposed at the lowermost end thereof which accommodates the upper portion of a coil compression spring 14.
  • the lower portion of coil spring 14 rests on the bottom wall of circular guide member 11.
  • Circular guide member 11 has elongated slots 15, 16 on opposite sides thereof.
  • Base member 12 has a pair of additional slots 15a, 16a and is positioned so that slot 15a is in alignment with elongated slot 15 and slot 16a is in alignment with slot 16.
  • Projecting through all four slots is a blade 17 which is constructed of an electrically conductive material and is fixedly attached at one end thereof to the upper portion of coil spring 14 by any known expedient for the purpose which will be more fully disclosed below.
  • Movable contact 19 in cludes contact plate 19a and a resilient L-shaped member 19b which is self-biased so as to be resiliently urged into abutting position with fixed contact 18.
  • FIGS. 1 and 2 the elements of the device are shown in their normal rest position.
  • L-shapecl member 19b of movable contact 19 is in abutting position with fixed contact 18. Electrical current is thus free to flow through said contacts.
  • Blade 17, under the resilient urging of coil spring 14, is yieldably positioned against fixed contact 18.
  • the contacting portion of blade 17 is bent slightly so that the uppermost portion thereof is turned away from fixed contact 18.
  • blade 17 moves in a downward direction thereby camming resilient L-shaped member 19b of movable contact 19 in the direction indicated by the arrow in FIG.
  • control button 13 and blade 17 are urged in an upward direction under the influence of coil spring 14.
  • the outwardly bent end portion of blade 17 now moves in the direction of the arrow shown in FIG. 4, and rides over L-shaped member 19b in the manner shown in FIG. 5.
  • movable contact 19 and fixed contact 18 remain in abutting or engaged position thus allowing the flow of current to continue therebetween.
  • the switch actuating means may be of any known type and need not be manually operable.
  • said electrically conductive means and said contacts having means cooperating (1) to interrupt electrical current flow between said contacts for a predetermined time as said electrically conductive means passes wholly from between said contacts and (2) to maintain electrical current flow through said contacts after said predetermined time and as said actuating means returns to its said first position.
  • said electrically conductive means comprises a blade member having a bent end portion which is adapted to exert a camming action upon at least one f said contacts as said blade member passes between said contacts and which permits said contacts to snap together after passing therebetween, thereby briefly interrupting current flow between said contacts.
  • An electrical switch having an open state and a closed state, said switch comprising two contacts biased toward one another so that said contacts are normally touching and the switch is normally closed; conductive means adapted to be inserted between said contacts to separate them while maintaining the switch in a closed state, and means for withdrawing said conductive means from said contacts along one of said contacts so that when said conductive means clears said one contact the switch is in an open state for a brief predetermined period of time.
  • An electrical switch hasing an open state and a closed state, said switch comprising two contacts at least one of which is biased toward the other for closing the switch; conductive means positionable between said contacts to separate them while maintaining the switch in a closed state, and means for withdrawing said conductive means from said contacts so that the switch is in an open state for a brief predetermined period of time.
US570206A 1966-08-04 1966-08-04 Momentary switch having normally engaged contacts actuated by a conductive member Expired - Lifetime US3392252A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CA814019A CA814019A (en) 1966-08-04 Electrical switch
US570206A US3392252A (en) 1966-08-04 1966-08-04 Momentary switch having normally engaged contacts actuated by a conductive member
JP4345767A JPS4418771B1 (de) 1966-08-04 1967-07-07
GB33908/67A GB1131999A (en) 1966-08-04 1967-07-24 Electrical switch mechanisms
DE19671640043D DE1640043B1 (de) 1966-08-04 1967-08-02 Elektrischer Schalter fuer Kurzunterbrechung
FR116884A FR1533649A (fr) 1966-08-04 1967-08-04 Nouvel interrupteur électrique

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CA814019T
US570206A US3392252A (en) 1966-08-04 1966-08-04 Momentary switch having normally engaged contacts actuated by a conductive member

Publications (1)

Publication Number Publication Date
US3392252A true US3392252A (en) 1968-07-09

Family

ID=74205549

Family Applications (1)

Application Number Title Priority Date Filing Date
US570206A Expired - Lifetime US3392252A (en) 1966-08-04 1966-08-04 Momentary switch having normally engaged contacts actuated by a conductive member

Country Status (6)

Country Link
US (1) US3392252A (de)
JP (1) JPS4418771B1 (de)
CA (1) CA814019A (de)
DE (1) DE1640043B1 (de)
FR (1) FR1533649A (de)
GB (1) GB1131999A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3557332A (en) * 1967-10-05 1971-01-19 Erwin Fernandes Momentary pushbutton switch with bridging block, ramp and cam means
US3662138A (en) * 1970-03-31 1972-05-09 Ibm Actuator for momentary closure of an elastic diaphragm switch
FR2343322A1 (fr) * 1976-03-04 1977-09-30 Seima Commutateur electrique a conctacts de passage
USD1003260S1 (en) * 2021-03-12 2023-10-31 Shin-Etsu Polymer Co., Ltd. Push button for switches

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2068713A (en) * 1933-12-26 1937-01-26 Chicago Telephone Supply Co Control device
US2198659A (en) * 1939-03-28 1940-04-30 Vincenzi John De Momentary action electric switch

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3204070A (en) * 1963-08-22 1965-08-31 Cons Cigar Corp Momentary switch using resilient leaf spring actuator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2068713A (en) * 1933-12-26 1937-01-26 Chicago Telephone Supply Co Control device
US2198659A (en) * 1939-03-28 1940-04-30 Vincenzi John De Momentary action electric switch

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3557332A (en) * 1967-10-05 1971-01-19 Erwin Fernandes Momentary pushbutton switch with bridging block, ramp and cam means
US3662138A (en) * 1970-03-31 1972-05-09 Ibm Actuator for momentary closure of an elastic diaphragm switch
FR2343322A1 (fr) * 1976-03-04 1977-09-30 Seima Commutateur electrique a conctacts de passage
USD1003260S1 (en) * 2021-03-12 2023-10-31 Shin-Etsu Polymer Co., Ltd. Push button for switches

Also Published As

Publication number Publication date
CA814019A (en) 1969-05-27
FR1533649A (fr) 1968-07-19
JPS4418771B1 (de) 1969-08-15
DE1640043B1 (de) 1970-09-03
GB1131999A (en) 1968-10-30

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