US2476103A - Rotary operated snap acting device - Google Patents

Rotary operated snap acting device Download PDF

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Publication number
US2476103A
US2476103A US648343A US64834346A US2476103A US 2476103 A US2476103 A US 2476103A US 648343 A US648343 A US 648343A US 64834346 A US64834346 A US 64834346A US 2476103 A US2476103 A US 2476103A
Authority
US
United States
Prior art keywords
tension
lever
opposite end
cam
members
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
US648343A
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English (en)
Inventor
Wilbert A Martin
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.)
FIRST IND CORP
FIRST INDUSTRIAL Corp
Original Assignee
FIRST IND CORP
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 FIRST IND CORP filed Critical FIRST IND CORP
Priority to US648343A priority Critical patent/US2476103A/en
Priority to FR940472D priority patent/FR940472A/fr
Priority to GB4378/47A priority patent/GB621299A/en
Application granted granted Critical
Publication of US2476103A publication Critical patent/US2476103A/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
    • H01H21/18—Movable parts; Contacts mounted thereon
    • H01H21/36—Driving mechanisms
    • H01H21/40—Driving mechanisms having snap action
    • H01H21/44—Driving mechanisms having snap action produced by flexing blade springs
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/18—Mechanical movements
    • Y10T74/18856—Oscillating to oscillating
    • Y10T74/18864—Snap action
    • Y10T74/18872—Plate spring

Definitions

  • a precision type switch By a precision type switch, I refer here to the A snap acting spring member generally desigtype illustrated by the Eaton Patent 2,170,748 and nated 39 comprises a tension member which is various modifications of it. made up of a pair of elongated tension elements Among the objects of this invention is the pro- 4
  • the terminal member 24 has formed has a substantial amount of overtravel in both integral with it an upstanding or anchor portion rotative directions beyond the contact-changing 41, so-called because the spring strip end 48 position; and (3) it is operable by very light and the knife edge 49 of the elongated actuating forces.
  • are anchored or pivoted on it in in coin operated devices such as juke boxes, pay grooves 52 and 53 respectively.
  • serves additionally as an adjustable (by (1) be compact; (2) operate with a certain as bending) means of limiting counterclockwise amount of overtravel; and (3) be operable by a rotation of the actuator 5
  • weight of a dime (2 grams).
  • the present inhas the tension member end portion 42 pivotally Vention resides in certain novel features of conengaged within its groove 54; and at its upper struction, combination of parts, and arrangement portion it has the operating surface 56 slidably of apparatus, particularly set forth in the claims, engaged with the operating surface or edge El of and is illustrated by the specific embodiment the cam 32. herein shown and described by way of example.
  • FIG. 1 a self-returning type of switch in which the Figure 1 is a side view with the cover removed parts are arranged so they will tend to assume of one embodiment of my invention; the positions shown in Figure 1 where the mov- Figs. 1a and 1b are top and end views, respecable contact 44 abuts the stop 6! formed as an tively, of Figure 1; integral extension of the terminal member 24.
  • Fig. 2 is a view similar to Figure 1 showing the This is referred to as the normal position of the movable parts in the opposite or current-carryswitch at which the circuit between the terminals ing position; 24 and 26 is broken.
  • Rotation of the cam 32 Fig. 3 is a sectional view of Fig. .2 taken on the by the operating member 31 will cause it to move line 33, and the actuating member 5
  • FIG. 1 the tension member is located just below the switch illustrated has a base plate 2
  • Terminal members 24 a position or axis of maximum stress where the and 26, having apertures 21 for attachment to pivot groove 52 is aligned with the tension memexternal wires (not shown), are mounted on the bar, and from this position it will snap upwardly base plate 2
  • having the which is formed as an integral part of the terhook-like cam member 32 riveted to its inner minal member 26.
  • the parts will then be in the end, is rotatably journaled within the circular positions shown in Fig. 2, terminals 24 and 26 opening 33 formed in the base plate.
  • is restrained against recipro- In order that the parts be self-returning to the cable movement by means of its shoulder por- Figure 1 position they must be so arranged that tion 34 and the C-washer or snap ring 36.
  • the the tension member will never cross over the outer end portion of the operating member may groove 53; it will be noted that, to this end, the
  • groove 53 is formed somewhat above the groove 52 on the anchor 41.
  • the anchor portion 41 may be suitably bent during assembly of the switch so as to limit the counterclockwise rotation of the actuating member to prevent the tension member from being moved above it.
  • the cam 32 is made to operate the actuator 5
  • the stops 58 may be positioned so as to prevent clockwise but permit counterclockwise operative movement from the normal position.
  • a snap acting device comprising spaced tension members interconnected at opposite ends, one of said ends being free to move between preselected positions with a snap action, a compression member disposed between said tension members and having an end interconnected with the free end and the opposite end in spaced relation with the other end of the spaced tension members, a bracket disposed between said spaced tension members and pivotally supporting the opposite end of the compression member, a lever disposed between said spaced tension members and supporting said other end of the tension members; said lever having a projection thereon engaging said bracket on the side thereof opposite the pivotal support for the compression member to form a fulcrum, said tension and compression members in the supported position forming a snap spring system having an axis of maximum stress, and cam means engaging said lever at a position spaced from said fulcrum to move said lever a predetermined distance whereby said other end of the tension members moves relative to the pivotally supported end of the compression member through the axis of maximum stress.
  • a snap acting device comprising spaced first stressed members interconnected at opposite ends, one of said ends being free to move between preselected positions with a snap action, a second stressed member disposed between said first stressed members and having an end interconnected with said free end and the opposite end in spaced relation with the other end of the spaced first stressed members, a bracket disposed between said spaced first stressed members and pivotally supporting the opposite end of the second stressed member, a lever disposed between said spaced first stressed members and supporting said opposite end of the first stressed members; said lever having a projection thereon engaging said bracket on the side thereof opposite the pivotal support for the second'stressed member to form a fulcrum, said first and second stressed members in the supported position forming a snap spring system having an axis of maximum stress, and cam means engaging said lever at a position spaced from said fulcrum to move said lever a predetermined distance whereby said opposite end of the first stressed members moves relative to the pivotally supported end of the second stressed member to move said snap spring through its axis of maximum stress
  • a snap action switch the combination of a base, opposed stops mounted on said base, a bracket mounted on said base and having grooves formed on opposite sides thereof in spaced relation, a snap spring system comprising a compression member and a tension member, one end of each of said tension and compression members being interconnected and free to move' between the opposed stops with a snap action, the opposite end of said compression member being pivotally supported in one of said grooves, and the opposite end of said tension member being in spaced relation with the opposite end of said compression member, a lever supporting the opposite end of said tension member and having a projection pivotally received in said other groove, said lever being shaped so that movement thereof about its pivotal support moves said tension member relative to the pivotal support of said compression member, and means rotatable about an axis engaging said lever to effect movement thereof.
  • a snap action switch the combination of a base, a bracket mounted on said base, a snap spring system comprising a compression member and a tension member, one endof each of said tension and compression members being interconnected and free to move between preselected positions with a snap action, the opposite end of said compression member being pivotally supported on one side of said bracket, and the opposite end of said tension member being in spaced relation with the opposite end of said compression member, a lever pivotally mounted on the opposite side ofsaid bracket and shaped to sup port the opposite end of said tension member, said lever being shaped so that movement thereof about its pivotal support moves said opposite end of the tension member relative to the pivotal support of said compression member, and cam means rotatable about an axis and engaging said lever to effect the aforegoing movement.
  • a snap action switch comprising a compression member and a tension member, one end of each of said tension and compression members being interconnected and free to move between preselected positions, means for pivotally supporting the opposite end of said compression memher, the opposite end of said tension member being in spaced relationwith the opposite end of said compression member, a rigid lever for supporting the opposite end of said tension member, means for fulcruming said lever so that movement of said lever moves said opposite end of the tension member relative to the pivotal support of said compression member, and cam means rotatable about an axis and engaging said lever at a position spaced from said fulcruming means to effect the aforegoing movement whereby said free end moves between the preselected positions with a snap action.
  • a tension member having an end free to move between spaced positions with a snap action and an opposite end portion
  • a compression member having an end interconnected with said free end and having an opposite end portion in spaced relation with said opposite end portion of the tension member
  • a lever providing a mounting for the other of said opposite end portions
  • means forming a pivot for said lever and a cam engaging said lever to move the opposite end portion supported by said lever through an axis of maximum stress to move said free end between the spaced positions.

Landscapes

  • Mechanisms For Operating Contacts (AREA)
  • Automatic Assembly (AREA)
  • Slide Fasteners, Snap Fasteners, And Hook Fasteners (AREA)
US648343A 1946-02-18 1946-02-18 Rotary operated snap acting device Expired - Lifetime US2476103A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US648343A US2476103A (en) 1946-02-18 1946-02-18 Rotary operated snap acting device
FR940472D FR940472A (fr) 1946-02-18 1947-02-12 Interrupteur électrique à rupture brusque à organe de commande rotatif
GB4378/47A GB621299A (en) 1946-02-18 1947-02-14 Improvements relating to rotary operated snap acting devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US648343A US2476103A (en) 1946-02-18 1946-02-18 Rotary operated snap acting device

Publications (1)

Publication Number Publication Date
US2476103A true US2476103A (en) 1949-07-12

Family

ID=24600418

Family Applications (1)

Application Number Title Priority Date Filing Date
US648343A Expired - Lifetime US2476103A (en) 1946-02-18 1946-02-18 Rotary operated snap acting device

Country Status (3)

Country Link
US (1) US2476103A (fr)
FR (1) FR940472A (fr)
GB (1) GB621299A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2545765A (en) * 1946-07-11 1951-03-20 Honeywell Regulator Co Snap acting device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2266537A (en) * 1937-02-16 1941-12-16 William B Elmer Snap acting device
US2417169A (en) * 1943-01-20 1947-03-11 First Ind Corp Snap switch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2266537A (en) * 1937-02-16 1941-12-16 William B Elmer Snap acting device
US2417169A (en) * 1943-01-20 1947-03-11 First Ind Corp Snap switch

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2545765A (en) * 1946-07-11 1951-03-20 Honeywell Regulator Co Snap acting device

Also Published As

Publication number Publication date
GB621299A (en) 1949-04-07
FR940472A (fr) 1948-12-14

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