US1910245A - Centrifugal switch - Google Patents

Centrifugal switch Download PDF

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Publication number
US1910245A
US1910245A US584107A US58410731A US1910245A US 1910245 A US1910245 A US 1910245A US 584107 A US584107 A US 584107A US 58410731 A US58410731 A US 58410731A US 1910245 A US1910245 A US 1910245A
Authority
US
United States
Prior art keywords
disk
motor
contact
shaft
switch
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
US584107A
Other languages
English (en)
Inventor
Allen M Harrelson
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.)
Hobart Manfacturing Co
Original Assignee
Hobart Manfacturing 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 FR748366D priority Critical patent/FR748366A/fr
Application filed by Hobart Manfacturing Co filed Critical Hobart Manfacturing Co
Priority to US584107A priority patent/US1910245A/en
Priority to GB35450/32A priority patent/GB411898A/en
Application granted granted Critical
Publication of US1910245A publication Critical patent/US1910245A/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
    • H01H35/00—Switches operated by change of a physical condition
    • H01H35/06—Switches operated by change of speed
    • H01H35/10—Centrifugal switches

Definitions

  • Fi 2 is an endelevational view of the switc l
  • Fig. 3 is an end elevational view yof the Stationary contacts of the switch.
  • Fig. 4 is a plan view of a detail of the switch structure.
  • Fig. 5 is a perspective view of the centrifugal switch removed from the shaft.
  • a motor indicated generally at 10 This motor comprises the usual field structure 11 to which is bolted 'by bolts 12 the end casting or bracket 13.
  • ThisI bracket serves to house the outer ball race y14 of a ball bearing which serves as a support for the main shaft 15 of the motor.
  • the inner race is held in position on the motor shaft by nuts 16.
  • a bearing cap 20 is bolted against the ball race 14 to hold the same in place by bolts 21 and is also provided with a removable plug 22-by means of which access may be had to the bearings without v removing the end casting.
  • Cover plate 24 v is fastened to the bearing cap by screws 25.
  • the centrifugal device comprises rst a carrier member 30 which is provided with an internal bore of substantially the same diameter as that'of the shaft and with an extended sleeve portion'31 at one end.
  • the shoulder 32 A may be formed on the shaftl 15 if desired and the sleeve 31 preferably is drawn up tightly against the same through the action of the internal ball race and nuts 16. The force of friction will be suiiciently great to rotate thesleeve without other holding means.
  • the sleeve is also formed with a series of depressions or pockets 33 preferably radial with respect to the shaft center, separated by walls 34. A series of balls 35 are placed one in each depression and serve as rotary weights, ada ted to move outwardly under the action o centrifugal force.
  • a disk 38 formed of insulating material is mounted upon the sleeve 31 with just enough clearance so thatit does not tend to bind or to produce undue friction.
  • the rotary contact consisting of an annular copper strip 39, is fastened to the outer side of the disk by rivets 40.
  • a cam late 41 is fastened to the disk by means o screws 42 and is provided with a bent over portion 43 10 and guiding edge 44.
  • a relatively lar e clearance is left between the edge 44 of tle diskand the carrier member in order that under normal conditions there will be no contact between these two metal surfaces, thus affording a guiding means for the contact plate and cam assembly which is 'sufficiently yieldablc to allow rotary contacts 5f).
  • a yieldable com ression spring tact 39 to seat itself natura ly against con- 46 is enclosed about the sleeve between the contact disk and a groove 47 whichl is formed in the carrier member adjacent the base of its curved portion, which spring normally tends to move the disk and the carrier member apart.
  • the sprin carrier member, and balls are complete enclosed within and protected by the ousing consisting of the disk and the cam plate.
  • the stationary contact members comprise two spaced copper stri s 50 which are connected in series with t e starting winding, and which are riveted to a late'51 of suitable insulating material.
  • T is plate is fastened to the end bracket of the motor by means of bolts or screws through holes 52.
  • the stationary contact members are so mounted with respect tothe rotational part of the switch that when the parts are sta-nding still the spring 46 will urge the rotary contact against the fixed contact.
  • centrifugal dcviee is enclosed, and is thus effectively protected against dirt or any foreign material which might happen to get into the interior of the switch and prevent its proper opel'ation.
  • This feature is of importance in many motor installations where the motor must operate in an atmosphere which is filled with particles of dirt or dust.
  • this device is a unitar structure which can be slipped onto the sha t .of the motor in a single operation. It may be held in place as illustrated and previously described, or by a set screw in carrier member 30 bearing against the shaft.
  • a centrifugal starting switch for a sinn'le phase motor comprising a carrier member rotatable with the shaft of said motor and formed with a series of radialdepressions, balls in said depressions ada ted to roll outwardly under centrifugal orce, a
  • a centrifugal switch comprising a rotating shaft, a carrier member fixed to said shaft, a plurality of radially movable weights rotated by said member, a contact disk loosely mounted on said member, a fixed contact, a cam plate attached to said disk and having a face cooperating with said cam plate and contact carrying disk assemweights, yieldable means urging said contacts toward closed position, said weights movable outwardly by centrifugal force against said plate to cause the separation of l the contacts.
  • a self-contained centrifugal device adapted to be readily attached to a rotating rier member, a floating disk mounted on said member, a cam plate carried by said disk, means tending to move said disk in one direction, centrifugally operable means cooperating with said plate for moving said disk in the opposite direction, both said inleans beng enclosed by said disk and said p ate.
  • a centrifugal starting device for a motor adapted to vbe pla-ced on the shaft of the motor as a unit comprising a carrier member formed With an extended sleeve, a disk of insulating material floating on said sleeve, a cam plate mounted on said disk-Weights rotatable With 'said carrier and cooperating with the cam plate, and'yieldable means urging the cam plate and said carrier part, said Weights at a predetermined speed of rotation adapted tomove outwardly by centrifugal said disk and plate forming a dirt proof housing enclosing said Weights and said yieldable means.
  • a centrifugal switch comprising a rotary shaft, a carrier member formed with an extended sleeve and rotatable with the shaft, centrifugally operable weights carried by said carrier member, a disk of insulating material mounted on said sleeve, a contact carried by said disk, an imperforateplate fastened to said disk and terminating closely adjacent said carrier member, said plate and said disk forming a dirt proof housing enclosing said carrier melnber and said Weights, a fixed contact, and yieldable means for urging said contacts together.
  • a starting switch for a single phase motor having a shaft comprising spaced stationary contacts mounted on the end bracket of the motor and connected in the starting winding circuit, a carrier member slidable onto the shaft and rotatable therewith, a plurality of radially extending pockets formed .in said member, Weights in said pockets, an insulating disk floating on said member, a contact ring on said disk, a cam plate larried by said disk cooperating with said Weights, and yieldable means normally urging said ring and said contacts together to close the starting winding circuit, said Weights adapted to move outwardly by centrifugal force to cause the separation of said ring from said contacts.
  • a centrifugal switch comprising a ro- I tary shaft, av carrier member rotatable with the shaft,a plurality of Weights carried by said carrier member, a disk of insulating material mounted on said shaft, a contact carried by said disk, lan imperforate plate fastened to said disk ⁇ and extending over said carrier member to form a dirt proof housing enclosing said member and said weights, a xed contact, and yieldable means urging said contacts together, said Weights under the action of centrifugal force adapte'd to cooperate with said plate to separate said contacts.
  • a starting Switch for a Single 'phase motor comprising a rotary shaft, a carrier member rotatable with the shaft, centrifurally operable weights carried by said carrier member, a disk of insulating material floating on said shaft, a contact carried by said'disk, a plate fastened to said disk, a fixed contact, and yieldable means for urging said contacts into circuit closing posltion,

Landscapes

  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Motor And Converter Starters (AREA)
US584107A 1931-12-31 1931-12-31 Centrifugal switch Expired - Lifetime US1910245A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FR748366D FR748366A (enrdf_load_stackoverflow) 1931-12-31
US584107A US1910245A (en) 1931-12-31 1931-12-31 Centrifugal switch
GB35450/32A GB411898A (en) 1931-12-31 1932-12-14 Improvements in or relating to centrifugal devices, for example electric switches

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US584107A US1910245A (en) 1931-12-31 1931-12-31 Centrifugal switch

Publications (1)

Publication Number Publication Date
US1910245A true US1910245A (en) 1933-05-23

Family

ID=24335962

Family Applications (1)

Application Number Title Priority Date Filing Date
US584107A Expired - Lifetime US1910245A (en) 1931-12-31 1931-12-31 Centrifugal switch

Country Status (3)

Country Link
US (1) US1910245A (enrdf_load_stackoverflow)
FR (1) FR748366A (enrdf_load_stackoverflow)
GB (1) GB411898A (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2495617A (en) * 1946-11-22 1950-01-24 Wallace Stanley Centrifugal governor device
US2598481A (en) * 1949-12-24 1952-05-27 Gen Electric Centrifugally operated motor speed governor
US2638518A (en) * 1951-01-18 1953-05-12 Glenn T Randol Speed-responsive device
US2775665A (en) * 1955-04-11 1956-12-25 Int Harvester Co Centrifugal speed governor
US2779837A (en) * 1954-02-24 1957-01-29 Houdaille Industries Inc Automatic switch control
US2849559A (en) * 1953-03-25 1958-08-26 Maytag Co Control apparatus
US2880287A (en) * 1956-12-24 1959-03-31 Janes Joseph Centrifugal switch
CN102262976A (zh) * 2010-05-31 2011-11-30 中国江南航天工业集团林泉电机厂 一种离心开关

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2495617A (en) * 1946-11-22 1950-01-24 Wallace Stanley Centrifugal governor device
US2598481A (en) * 1949-12-24 1952-05-27 Gen Electric Centrifugally operated motor speed governor
US2638518A (en) * 1951-01-18 1953-05-12 Glenn T Randol Speed-responsive device
US2849559A (en) * 1953-03-25 1958-08-26 Maytag Co Control apparatus
US2779837A (en) * 1954-02-24 1957-01-29 Houdaille Industries Inc Automatic switch control
US2775665A (en) * 1955-04-11 1956-12-25 Int Harvester Co Centrifugal speed governor
US2880287A (en) * 1956-12-24 1959-03-31 Janes Joseph Centrifugal switch
CN102262976A (zh) * 2010-05-31 2011-11-30 中国江南航天工业集团林泉电机厂 一种离心开关
CN102262976B (zh) * 2010-05-31 2013-10-30 中国江南航天工业集团林泉电机厂 一种离心开关

Also Published As

Publication number Publication date
FR748366A (enrdf_load_stackoverflow) 1933-06-30
GB411898A (en) 1934-06-14

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