US2110233A - Electric switch - Google Patents

Electric switch Download PDF

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Publication number
US2110233A
US2110233A US88847A US8884736A US2110233A US 2110233 A US2110233 A US 2110233A US 88847 A US88847 A US 88847A US 8884736 A US8884736 A US 8884736A US 2110233 A US2110233 A US 2110233A
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US
United States
Prior art keywords
switch
lamp
contact
lever
swing
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
US88847A
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English (en)
Inventor
Nabakowski Hermann
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Individual
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
Application granted granted Critical
Publication of US2110233A publication Critical patent/US2110233A/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
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/025—Light-emitting indicators

Definitions

  • This invention relates to tumbler switches for electric circuits and provides for a switch of the kind which indicates its aixed location by means of a glowing lamp, especially an incandescent lamp, fitted in the lamp-holder and which glows when the switch is switched off.
  • the present invention successfully eliminates all the prevailing diiiiculties and provides a practical tumbler switch With lamp embodiment. This is achieved by fastening the lamp to the switch-base, which is preferably made of pressboard, by means of a tubular sleeve-bushing forming at its upper end a bearing for a forked conductor, connecting the junction-contacts with one another or cutting them, as may be required, connecting the said conductor with a similar forked switch handle by an arrangement of spring, and mounting the switch handle to pivot upon an axis positioned parallel to the pivotal axis of the conductor formed as a swing hoop or yoke, and to rest on the base itself.
  • Fig. ⁇ 1 represents a vertical section through th switch on the plane in which the axis of rotation of the handle and also of the moving contact lies;
  • Fig. 2 is an alternate section of the a angle to Fig. 1;
  • Fig. 3 is a top view of the lower partof the switch without the bridge-contact-piece and handle;
  • Fig. 4 is a top view of the switch-cap.
  • the lamp I in-
  • switch on dicating the location of the switch and comprising a so-called dwarf-glowlamp is xed into the switch-base 5, preferably made of pressboard, by means of a shell-like socket member or sleevebushing 2 made of insulating material and internally threaded to receive the lamp screwed thereinto.
  • This socket or bushingZ is formed in this instance with two opposite laterally disposed wing-lugs or joining-pieces 3, at its lower end, which are turned in behind or under shoulders (see Fig. 2),*'provided in said base 5, like a bayonet-joint as indicated in dotted lines in Fig. 3.
  • the aforenamed bushing 2 is formed with two upwardly extending arched portions oppositely disposed at 90 degrees to the lower end jointing lugs. 'I'he peaks of these arched portions are reinforced by lateral enlargements 8 outward, and said enlargements constituting two ear-like projections are arcuated or indented upwardly to form downwardly directed cavities. Into these cavities is inserted with correspondingly rounded-off extremities 9 the opposite arms of a U-shaped or hoop-like swing contact-piece I0, II, a side view of which is presented in Fig. 2. Opposite the extremities 9, the
  • each of said aps I2 is shaped into an effective hook I3 with which is engaged the suspending end of a helical spring I4 at opposite sides of the socket or bushing member 2.
  • the movable contact piece I0, II is given a swing movement to opposite positions by a forkshaped swing lever or handle I5, to which the upper ends of the aforenamed springs I4 are xed atvII.
  • the two arms I'I of this fork lever are vtension by the springs I4.
  • lever I5 is thus adapted to swing upon an axis within the base parallel to the pivotal or swing axis of the conductor contact I0, II Itis preferable to provide for said lever axis substantially removed from and below said contact axis, and it is so shown lower in or closer to the bottom of the switch base than said other axis, so as to secure the best result. ⁇ From the foregoing description and drawings it will be seen that a dead-centre snap-swing" action is provided by this construction, eifectuated by the springs I4 connected between the switch lever and the contact membe whereby said member II), II will be caused to swing instantly to opposite on and o positions by operation of the lever.
  • a cap or cover K (see Fig. 4), having a slit S through which the handle-part 24 of the lever fork I protrudes.
  • this handle 24 is hollowed out and the entire lever structure of course consists of a light-coloured and transparent material.
  • a crown or hood strip 25 of transparent material is further laid spportively upon the shoulders formed by the fork-arms I'I and fits with a central aperture over the part 24. This shrouds or shades the lamp applied in the socket 'or bushing therebelow. Outwardly said strip bears guidively against ribbed projections 26 formed thereover on the inside of the cap K.
  • the strip 25 When the lamp is lightedl and glows in the respective position of connection (especially nonswitching of the external circuits of a lighting installation), the strip 25 will shine outwardly through the slit S, thus indicating-the location of the switch.
  • the lamp -in its holding socket makes contact with conductor elements connected with the line attachments of the switch so as to allow sufcient current passage through the lamp when the switch is thrown to off position, or when the switch is .either oif or "on. 'Ihe lower end of the lamp is shown resting on a contact 28 which connects with one terminal post of the switch, and its ferrule bears against another contact 29 (see Fig. 3) connecting with the other post of the switch.
  • These opposite terminal posts are conventionally represented in Fig. 3, but it will be understood that they may be variously provided in know Ways.
  • the switch of the illustrative embodiment is designed for use both as a circuit-breaker and as a pole-changing switch, this form being selected to exemplify the invention because it is the one in most general use.
  • the invention is not in any way bound to this one special type of switch only; and for such reason no further description of the internal structure or arrangements of the contact-springs has been made. It is sufiicient to say that the contact piece opens and closes the circuit between the terminal posts with itsl swing to opposite positions. l
  • An electric switch including a miniature incandescent glow-lamp for indicating in darkness the location of the switch when the same is thrown to off position, comprising in combination, an insulate base, a shell socket xed centrally in the. base and within which the lamp is fitted by screwing, the said shell socket also being an insulate and having its upper part formed into pivot bearings for a swinging contact member, a U-shaped metallic swinging contact-piece having ends engaged in said bearings under spring tension, springs connected on opposite sides to said contact piece, and a forked throw lever to which said springs are also connected, the said lever being pivoted under the spring tension on bearings formed in the base below the pivot axis of said contact-piece and adapted by action of the springs between the two to swing the contact piece with snap action into opposite on and off positions by throw of the lever in alternate directions.
  • an electric switch made of transparent material and its fork-like portions serve to support a separate hooding strip of transparent material providing a shield inside the'switch for the lamp while allowing the light therefrom to penetrate outwardly to indicate the position of the switch; the said separate strip of transparent material being arcuated and flush with the inner top surface of a cover applied over the entire struc- 70[ ture in unity therewith.

Landscapes

  • Tumbler Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)
US88847A 1935-07-05 1936-07-03 Electric switch Expired - Lifetime US2110233A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEN38332D DE630092C (de) 1935-07-05 1935-07-05 Elektrischer Schalter mit den Schalterort anzeigender Lampe

Publications (1)

Publication Number Publication Date
US2110233A true US2110233A (en) 1938-03-08

Family

ID=25989183

Family Applications (1)

Application Number Title Priority Date Filing Date
US88847A Expired - Lifetime US2110233A (en) 1935-07-05 1936-07-03 Electric switch

Country Status (5)

Country Link
US (1) US2110233A (enrdf_load_stackoverflow)
DE (1) DE630092C (enrdf_load_stackoverflow)
FR (1) FR807784A (enrdf_load_stackoverflow)
GB (1) GB442720A (enrdf_load_stackoverflow)
NL (1) NL43802C (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2512975A (en) * 1947-08-14 1950-06-27 Elwin W Sherrard Illuminated toggle switch
US2672551A (en) * 1949-06-09 1954-03-16 Douglas Aircraft Co Inc Self-lighted control operating member

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2512975A (en) * 1947-08-14 1950-06-27 Elwin W Sherrard Illuminated toggle switch
US2672551A (en) * 1949-06-09 1954-03-16 Douglas Aircraft Co Inc Self-lighted control operating member

Also Published As

Publication number Publication date
FR807784A (fr) 1937-01-21
GB442720A (en) 1936-02-13
DE630092C (de) 1936-05-20
NL43802C (enrdf_load_stackoverflow)

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