US1474013A - Electric switch - Google Patents

Electric switch Download PDF

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Publication number
US1474013A
US1474013A US253882A US25388218A US1474013A US 1474013 A US1474013 A US 1474013A US 253882 A US253882 A US 253882A US 25388218 A US25388218 A US 25388218A US 1474013 A US1474013 A US 1474013A
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US
United States
Prior art keywords
switch
contact
support
movement
contacts
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
US253882A
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English (en)
Inventor
Reuben B Benjamin
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.)
Benjamin Electric Manufacturing Co
Original Assignee
BENJAMIN ELECTRIC Manufacturing 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 GB132492D priority Critical patent/GB132492A/en
Application filed by BENJAMIN ELECTRIC Manufacturing CO filed Critical BENJAMIN ELECTRIC Manufacturing CO
Priority to US253882A priority patent/US1474013A/en
Application granted granted Critical
Publication of US1474013A publication Critical patent/US1474013A/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
    • H01H15/00—Switches having rectilinearly-movable operating part or parts adapted for actuation in opposite directions, e.g. slide switch
    • H01H15/02—Details
    • H01H15/06—Movable parts; Contacts mounted thereon
    • H01H15/16—Driving mechanisms
    • H01H15/18—Driving mechanisms acting with snap action

Definitions

  • the present invention relates to electric switches of the snap action type and includes (1) novel mechanism for applying the actuating force through an enclosing weatherproof casing, (2) a novel arrangement of the switch contacts and binding terminals, (3) the provision of means for applying a prying action to the movable contact before subjecting it to the snap action, i) the use of binding terminals which serve as stops for the movable switch element, and (5) certain details of construction and arrangements of of parts which will be more readily understood upon referring to the following detailed description taken in connection with the accompanying drawing which illustrates the preferred embodiment of my invention.
  • Fig. 1 is a plan view of a switch and enclosing casing constructed in accordance with my invention, the cover of the casing being removed to show the switch within;
  • Flg. 2 is a vertical section taken on a plane indicated by line 2-2 of Fig. 1, the switch supports and other parts being shown in full.
  • Fig. 3 is a bottom plan view of an insulating block which forms the support for the switch parts;
  • Fig. 4 is a perspective view of one of'the fixed switch contacts
  • Fig. 5 is a perspective view of the link which connects the manual operating member' with an actuating member of the switch actuating mechanism
  • Fig. 6 is a partial sectional View similar to a portion of Fig. 2 illustrating a inodifica tion in which the manual operating member is in a. different location;
  • Fig. 7 is a plan view of the insulating support and the switch parts mounted upon it;
  • Fig. 8 is a central vertical section of the same, taken on a plane indicated by line 88 of Fig. 7, showing the parts in the open position of the switch;
  • Fig. 9 is a similar View showing the parts in the closed position of the switch.
  • Fig. 10 is a detail view of a portion of the movable contact member. Throughout these views like characters refer to like parts.
  • A designates the enclosing casing of the switch, which may be a junction box, outlet box, or other enclosing instrumentality.
  • the particular form of casing shown includes the cup-shaped portion 10 which is closed by a lid or cover 11 in the form shown. These portions are circular and the cover 11 is secured to the cup 10 by a plurality of screws 12 which pass through openings in the cover into engagement with threaded openings tapped into the cup 10.
  • a gasket 13 of rubber or other suitable water-proof material is interposed between cup 10 and the lid or cover 11.
  • the gland 14 is provided at one point in the periphery of the cup for the passage of the operating member 15 which is capable of a sliding to and fro movement while the interior of the casing is kept dry by reason of the presence of the packing 16 of the gland 14.
  • the button or head 17 on the member 15 enables it to be grasped between the thumb and finger to be pulled outward or pushed inward.
  • Fig. 6 the same parts are present but pass through the bottom of the cup 10, as illustrated. In this view the parts are designated by the same reference characters, primed.
  • the cup portion 10 of the casing A is provided with a threaded'opening 18 for the purpose of connecting a conduit to it.
  • the various switch parts are mounted upon a support or base B which is located within the casing and rests upon the annular rib 19 formed upon the bottom of the cup.
  • the support or base B is composedof any suitable insulating material, preferably a durable insulating compound. It is secured in the cup 10 of the casing by means of two securing screws 20 which extend through openings 20 in support B int threaded engagement with openings in the portion 10 of the casing. Obviously, the support B might be secured in any other suitable way.
  • the support B is provided with a central recess 21 in which the switch parts are located. These switch parts include four relatively fixed contacts 22, 23,
  • each of these yielding brush contacts is provided with a. slot, such as the slot 26 of the contact 22, which weakens its resistance and causes it to yield more readily to the pressure of the movable contact which engages it.
  • the arrangement is such that contacts 22 and 23 may be electrically connected through the agency of bridging contact 27, and contacts 24 and 25 may be similarly connected through the agency of bridging contact 28.
  • These bridging contacts are secured to an elongated cross-head 29, of insulating material.
  • the bridge contacts 27 and 28 are bent down on opposite sides of the insulating cross-head 29, as indicated in the case of contact 27 by the portions 30 and 31, shown more particularly in Figs. 8 and 9.
  • Each of the fixed contacts rests against a flat face upon the support B, and a terminal plate bears directly against the upper face of the contact.
  • the screw 33 extending through an opening in the support B and through an opening 34 in contact 22, passes into engagement with a threaded opening in plate 32, and when screwed home securely holds the contact 22 and plate 32 in position upon the support while at the same time, bringing the two into good electrical engagement.
  • the plate 32 is provided with a plurality of terminal plate.
  • binding screws 35 which engage threaded openings in the plate 32 and pass down into suitable openings in the support B.
  • the purpose of these screws is, of course, to secure the conductors in place and to put them in good electrical connection with the In the case of contact 23, the terminal plate 36 is somewhat difi'erently shaped as it is provided with but a single binding screw 37.
  • This plate is also provided wit an upturned lip 38 for con venience in holding the wire or other conductor in position when screwing down the screw 37.
  • the screw 39 serves to mechanically secure the parts together, and at the same time, provides good electrical engagement between the contact 23 and the terminal plate 36.
  • the fixed contact 24 has a terminal plate 40, holding screw 41 and binding screws 42, which are the same in construction and arrangement as the corresponding parts associated with contacts 32.
  • contact 35 has a terminal plate 43, lip 44, holding screw 45, and binding screw 46, which are similar in arrangement and construction to the cor responding parts associated with contact 23.
  • Plates 32 and have over-hanging portions 47 and 48 respectively which serve as stops to limit the upward or closing movement of the movable bridging con tacts 27 and 28, as the latter are carried upward by cross-head 29.
  • the movable contact-carrying element. of the switch includes not only the insulating cross-head 29, but also a U-shaped member 49, whose .arms 50 and 51 are mounted on the transverse pivot pin 52 on which the contact-carrying element oscillates.
  • the portion of the member 49 that is adjacent to the cross-head 29 is shaped as illustrated more particularly in Figs. 9 and 10. This portion, designated 53, is provided with suitable openings through which it is riveted to the cross-head 29 by rivets 54.
  • the pivot pin 52 rests in depressions 55 formed in the support B.
  • the actuating member 62 is made up oi parallel pieces 63, of insulating material suitably spaced at one end by an insulating washer 64 and at the other end by the head of the intermediate member 59. It will be noted that pivot 61 which connects the members 59 and 62 is eccentric to the pivot. 52.
  • the spring 65 preferably encloses the shank of the intern'iediate member 59 and abuts at one end against a shoulder 61 formed on said member and at the other end against the portion 53 of the member 49 forming part of the movable contact carrying member of the switch.
  • the stop 58 is positioned so as to engage the intermediatemembcr 59 at a certain point in the latters movement.
  • a nub or projection 66 upon the support B engages the opposite side of said intermediate member .atanother point in the latters movement.
  • the link 66 which connects the manually operated member 15 with the actuating member 62 may be of any suitable construction. in the present instance, it is a simple wire bent into angular formation near its ends and the end near the member 62 is flattened out to form a head 67 as illustrated.
  • This link may be connected to the member 15 which moves in a direction parallel to the cover 11, or, as in the construction illustrated in Fig. 61, it may be connected to a member which moves in a direction at right angles to the cover.
  • the upward throw of the cross-head 29 is limited by stops 47 and 48 upon the terminal plates 32 and 40 respectively.
  • the throw in the opposite direction maybe limited by a portlon of the wall of the recess 21, as for example the portion indicated in 68in Figs. 8 and 9.
  • the provision of a plurality of binding screws for each of the binding plates 32 and 40 increases the uses to which the switch may be put.
  • an electric switch the combination with a pivoted contact carrying member, of a concentrically pivoted actuating member having a to and fro movement, an intermediate member having pivotal connection with said actuating member and sliding connection with said contact carrying member, said pivotal connection with said actuating member being eccentric to the pivotal connection of said actuatin member a com-- piession spring acting between said intermediate member and contact carrying member, and stops for engaging said intermediate member as said actuating member nears the limit of its movement in each direction whereby said intermediate member acts as a lever on each stop as a fulcrum to shift said contact carrying member from its limiting position.
  • An electric switch comprising a support, fixed and movable contacts mounted on said support, an actuating member for said movable contact, a pivot for said mem ber resting in depressions in said support, means for accumulating energy resulting from the movement of said actuating memher and suddenly releasing the accumulated energy to give said movable contact a snap movement, and a frame secured to said support having its extremities overlying said depressions to hold the pivot in place and having its intermediate portion positioned so as to engage said means to bring about a prying action on said movable contact prior to the beginning of said snap action.
  • An electric switch comprising a support, fixed and movable contacts mounted on said support, an actuating member, means for transmitting energy from said member to said movable contact, a pivot for said member resting in depressions in said support, and a frame overlying said pivot in said depressions and serving as a stop for said transmitting means.
  • a switch construction comprising a switch blade oscillatable back and forth, a contact co-operating therewith, an actuating member shiftable back and forth, transmission means between said actuating member and switch blade, comprising a spring shiftable back and forth past the dead center, a spring shifting link and an abutment for exerting pressure on said link to positively actuate said switch blade.
  • a switch construction comprising a switch blade oscillatable back and forth, a contac: co-operating therewith, an actuatirg member shiftable back and forth, transmission means between said actuating member and switch blade, comprising a spring shiftable back and forth past the dead center, a spring shifting link and an abutment for exerting pressure on said link to positively free said switch blade from engagement with said contact.

Landscapes

  • Push-Button Switches (AREA)
  • Switch Cases, Indication, And Locking (AREA)
US253882A 1918-09-13 1918-09-13 Electric switch Expired - Lifetime US1474013A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB132492D GB132492A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1918-09-13
US253882A US1474013A (en) 1918-09-13 1918-09-13 Electric switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US253882A US1474013A (en) 1918-09-13 1918-09-13 Electric switch

Publications (1)

Publication Number Publication Date
US1474013A true US1474013A (en) 1923-11-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US253882A Expired - Lifetime US1474013A (en) 1918-09-13 1918-09-13 Electric switch

Country Status (2)

Country Link
US (1) US1474013A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB132492A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2524784A (en) * 1946-01-24 1950-10-10 Chicago Telephone Supply Co Snap switch
US2571623A (en) * 1948-02-18 1951-10-16 Axel R Scholin Toggle mechanism and switch incorporating same
US2614186A (en) * 1948-09-16 1952-10-14 Hoover Co Snap switch
US2807684A (en) * 1955-09-07 1957-09-24 Clark Equipment Co Reversing switch

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2524784A (en) * 1946-01-24 1950-10-10 Chicago Telephone Supply Co Snap switch
US2571623A (en) * 1948-02-18 1951-10-16 Axel R Scholin Toggle mechanism and switch incorporating same
US2614186A (en) * 1948-09-16 1952-10-14 Hoover Co Snap switch
US2807684A (en) * 1955-09-07 1957-09-24 Clark Equipment Co Reversing switch

Also Published As

Publication number Publication date
GB132492A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

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