US3048684A - Electric rotary switch indexing means - Google Patents

Electric rotary switch indexing means Download PDF

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Publication number
US3048684A
US3048684A US777527A US77752758A US3048684A US 3048684 A US3048684 A US 3048684A US 777527 A US777527 A US 777527A US 77752758 A US77752758 A US 77752758A US 3048684 A US3048684 A US 3048684A
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US
United States
Prior art keywords
drum
indexing
rotary switch
electric rotary
indexing means
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
US777527A
Inventor
Sharp Leonard Wil Descarrieres
Blight Dennis Jack
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.)
Plessey Co Ltd
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Plessey Co Ltd
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Filing date
Publication date
Application filed by Plessey Co Ltd filed Critical Plessey Co Ltd
Application granted granted Critical
Publication of US3048684A publication Critical patent/US3048684A/en
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63H—TOYS, e.g. TOPS, DOLLS, HOOPS OR BUILDING BLOCKS
    • A63H33/00—Other toys
    • 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
    • H01H19/02—Details
    • H01H19/10—Movable parts; Contacts mounted thereon
    • H01H19/11—Movable parts; Contacts mounted thereon with indexing means
    • 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
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20636—Detents
    • 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
    • Y10T74/20—Control lever and linkage systems
    • Y10T74/20576—Elements
    • Y10T74/20636—Detents
    • Y10T74/20642—Hand crank

Definitions

  • This invention relates to electric rotary switches and is particularly applicable to a device for changing circuits, such as for example a wave change switch.
  • An object of this invention is to provide an improved indexing mechanism which is particularly applicable to a miniature rotary switch.
  • a drum carries an indexing ring which is free to slide axially relative to the drum, and a spring is arranged inside the drum which presses said indexing ring against an index plate.
  • the drum is mounted upon a driving shaft to enable the drum to transmit a drive to the index ring.
  • drum provides ample space for accommodating the spring; preferably a helical spring with a very low stress level is used.
  • a feature of the invention is the provision of means for the drum to engage with the indexing ring at maximum radius thereby reducing the effect of any play in the device.
  • a further feature of the invention is that the drum can be packed with grease or the like with a view to increasing the reliability and the life of the assembly.
  • Another feature of the invention is the provision of a stop plate for limiting the rotary movement of the drum.
  • FIGURE 1 is a sectional elevation
  • FIGURE 2 is an end view of a switch contact assembly and indexing mechanism.
  • An index mechanism comprises an open-ended drum 4 which is mounted upon the shaft 3 and is compelled by flats So on the shaft 2 to rotate with the shaft.
  • Two diametrically opposed longitudinal slots 5 are cut in the open end of the drum to accommodate lugs 6 integral with an indexing ring 7.
  • a helical spring 8 of very low stress level is inserted within the drum and around the shaft 3 for pressing said ring 7 against an index plate 9 which in turn is secured to the side plates 1.
  • a stop plate 10 is fixed to the rear face of the drum 4, and end stops 11 spaced a suitable distance apart are fixed to one end of the switch contact assembly 2 for limiting the movement of rotation of the drum 4 in a clockwise or anti-clockwise direction.
  • a combined indexing and drive device for an electric switch comprising a cup-shaped drum mountable on the drive shaft of the switch, such that the drum is constrained to rotate with the drive shaft, the drum having a base through which the shaft passes and a wall axially directed transversely of the base, an indexing ring located within the drum and free to slide axially of the shaft, an indexing plate located within the drum, the plate having means whereby it can be constrained against rotation with the drum, a spring arranged within the drum, the spring bearing on the base of the drum and serving to press the indexing ring against the indexing plate, a driving connection between the wall of the drum and the indexing ring, the connection between the drum and the ring being at a greater radial distance from the axis of rotation of the shaft than is the distance from the axis at which the ring indexes with the plate.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Switches With Compound Operations (AREA)

Description

Aug. 7, 1962 1.. w. D. SHARP ET AL 3,048,684
ELECTRIC ROTARY SWITCH INDEXING MEANS Filed Dec. 1,1958
Fla].
United States Patent 3 048 684 ELECTRIC ROTARY SWITCH INDEXING MEANS Leonard William Descarrieres Sharp, Loughton, and Donnis Jack Blight, Woodford Green, England, assignors to The Plessey Company Limited, London, England, a
British company Filed Dec. 1, 1958, Ser. No. 777,527 Claims priority, application Great Britain Dec. 2, 1957 1 Claim. (Cl. 200-166) This invention relates to electric rotary switches and is particularly applicable to a device for changing circuits, such as for example a wave change switch.
In rotary switches for changing circuits it is customary to have an indexing mechanism to control the rotary movement between the rotary contacts and stator contacts. It has previously been proposed to provide an indexing mechanism consisting of a spring-loaded plate which is fitted with balls; said plate presses the balls against an index plate so that upon rotation of the plate the balls click at predetermined positions into indexing recesses. The device thus provides What is generally known as a clicking device. This construction is not very convenient in manufacture, more particularly in sizes suitable for miniature switches.
An object of this invention is to provide an improved indexing mechanism which is particularly applicable to a miniature rotary switch.
According to the invention a drum carries an indexing ring which is free to slide axially relative to the drum, and a spring is arranged inside the drum which presses said indexing ring against an index plate. The drum is mounted upon a driving shaft to enable the drum to transmit a drive to the index ring.
An advantage of this arrangement is that the drum provides ample space for accommodating the spring; preferably a helical spring with a very low stress level is used.
A feature of the invention is the provision of means for the drum to engage with the indexing ring at maximum radius thereby reducing the effect of any play in the device.
A further feature of the invention is that the drum can be packed with grease or the like with a view to increasing the reliability and the life of the assembly.
Another feature of the invention is the provision of a stop plate for limiting the rotary movement of the drum.
A convenient embodiment of the invention is illustrated in the accompanying drawing in which:
FIGURE 1 is a sectional elevation, and
hce
FIGURE 2 is an end view of a switch contact assembly and indexing mechanism.
Referring to the drawing:
Side plates 1 support a switch contact assembly 2 having a driving shaft 3.
An index mechanism comprises an open-ended drum 4 which is mounted upon the shaft 3 and is compelled by flats So on the shaft 2 to rotate with the shaft. Two diametrically opposed longitudinal slots 5 are cut in the open end of the drum to accommodate lugs 6 integral with an indexing ring 7. A helical spring 8 of very low stress level is inserted within the drum and around the shaft 3 for pressing said ring 7 against an index plate 9 which in turn is secured to the side plates 1.
A stop plate 10 is fixed to the rear face of the drum 4, and end stops 11 spaced a suitable distance apart are fixed to one end of the switch contact assembly 2 for limiting the movement of rotation of the drum 4 in a clockwise or anti-clockwise direction.
What we claim is:
A combined indexing and drive device for an electric switch, comprising a cup-shaped drum mountable on the drive shaft of the switch, such that the drum is constrained to rotate with the drive shaft, the drum having a base through which the shaft passes and a wall axially directed transversely of the base, an indexing ring located within the drum and free to slide axially of the shaft, an indexing plate located within the drum, the plate having means whereby it can be constrained against rotation with the drum, a spring arranged within the drum, the spring bearing on the base of the drum and serving to press the indexing ring against the indexing plate, a driving connection between the wall of the drum and the indexing ring, the connection between the drum and the ring being at a greater radial distance from the axis of rotation of the shaft than is the distance from the axis at which the ring indexes with the plate.
References Cited in the file of this patent UNITED STATES PATENTS 2,113,463 Hall Apr. 5, 1938 2,519,215 Appleton et al Aug. 15, 1950 2,531,246 Batcheller Nov. 21, 1950 2,679,557 Miller May 25, 1954 2,687,275 Hufi Aug. 24, 1954 2,690,481 Courtney Sept. 28, 1954 2,692,309 Ellithorpe Oct. 19, 1954
US777527A 1957-12-02 1958-12-01 Electric rotary switch indexing means Expired - Lifetime US3048684A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB37515/57A GB894626A (en) 1957-12-02 1957-12-02 Improvements in or relating to electric rotary switches

Publications (1)

Publication Number Publication Date
US3048684A true US3048684A (en) 1962-08-07

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ID=10397051

Family Applications (1)

Application Number Title Priority Date Filing Date
US777527A Expired - Lifetime US3048684A (en) 1957-12-02 1958-12-01 Electric rotary switch indexing means

Country Status (5)

Country Link
US (1) US3048684A (en)
DE (1) DE1133005B (en)
FR (1) FR1208982A (en)
GB (1) GB894626A (en)
NL (1) NL233790A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3230793A (en) * 1962-05-10 1966-01-25 Cts Corp Indexing mechanism
US3304800A (en) * 1963-09-09 1967-02-21 Robertshaw Controls Co Switch operating unit
US3309940A (en) * 1963-11-27 1967-03-21 Int Standard Electric Corp Detention mechanism for rotary switches, particularly stepping switches

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2113463A (en) * 1935-04-16 1938-04-05 Mallory & Co Inc P R Electric switch
US2519215A (en) * 1949-08-27 1950-08-15 Appleton Electric Co Rotary snap switch
US2531246A (en) * 1947-02-15 1950-11-21 Ark Les Switch Corp Clicker mechanism for spindles
US2679557A (en) * 1951-07-16 1954-05-25 United Specialties Co Starter ignition switch
US2687275A (en) * 1950-12-12 1954-08-24 Harper Wyman Co Handle operated locking type gas valve
US2690481A (en) * 1949-03-25 1954-09-28 Helen E Courtney Switch for automatic safety locking devices and systems
US2692309A (en) * 1949-08-11 1954-10-19 Gilbert S Ellithorpe Combination rotary switch and circuit breaker

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT44322B (en) * 1908-12-07 1910-10-10 Viktorin Fousek Electric rotary switch.
US2395572A (en) * 1944-11-13 1946-02-26 Cutler Hammer Inc Rotary electric switch
CH280950A (en) * 1947-04-16 1952-02-15 Comp Generale Electricite Method for insulating the end of a high voltage cable.
GB716967A (en) * 1951-07-28 1954-10-20 Simplex Electric Co Ltd Improvements in rotary electric switches
DE950477C (en) * 1951-11-27 1956-10-11 Busch Jaeger Duerener Metall Electric rotary switch

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2113463A (en) * 1935-04-16 1938-04-05 Mallory & Co Inc P R Electric switch
US2531246A (en) * 1947-02-15 1950-11-21 Ark Les Switch Corp Clicker mechanism for spindles
US2690481A (en) * 1949-03-25 1954-09-28 Helen E Courtney Switch for automatic safety locking devices and systems
US2692309A (en) * 1949-08-11 1954-10-19 Gilbert S Ellithorpe Combination rotary switch and circuit breaker
US2519215A (en) * 1949-08-27 1950-08-15 Appleton Electric Co Rotary snap switch
US2687275A (en) * 1950-12-12 1954-08-24 Harper Wyman Co Handle operated locking type gas valve
US2679557A (en) * 1951-07-16 1954-05-25 United Specialties Co Starter ignition switch

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3230793A (en) * 1962-05-10 1966-01-25 Cts Corp Indexing mechanism
US3304800A (en) * 1963-09-09 1967-02-21 Robertshaw Controls Co Switch operating unit
US3309940A (en) * 1963-11-27 1967-03-21 Int Standard Electric Corp Detention mechanism for rotary switches, particularly stepping switches

Also Published As

Publication number Publication date
NL233790A (en)
GB894626A (en) 1962-04-26
FR1208982A (en) 1960-02-26
DE1133005B (en) 1962-07-12

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