US2591683A - Selector switch brush - Google Patents

Selector switch brush Download PDF

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Publication number
US2591683A
US2591683A US35201A US3520148A US2591683A US 2591683 A US2591683 A US 2591683A US 35201 A US35201 A US 35201A US 3520148 A US3520148 A US 3520148A US 2591683 A US2591683 A US 2591683A
Authority
US
United States
Prior art keywords
wiper
spacer
brush
pins
contact
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
US35201A
Other languages
English (en)
Inventor
Deakin Gerald
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric 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
Priority to BE489532D priority Critical patent/BE489532A/xx
Priority to DES7872D priority patent/DE892621C/de
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Priority to US35201A priority patent/US2591683A/en
Priority to GB8907/49A priority patent/GB670347A/en
Priority to FR986388D priority patent/FR986388A/fr
Priority to CH292259D priority patent/CH292259A/fr
Application granted granted Critical
Publication of US2591683A publication Critical patent/US2591683A/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
    • H01H63/00—Details of electrically-operated selector switches
    • H01H63/02—Contacts; Wipers; Connections thereto
    • H01H63/04—Contact-making or contact-breaking wipers; Position indicators therefor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H63/00—Details of electrically-operated selector switches
    • H01H63/02—Contacts; Wipers; Connections thereto
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/54—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere
    • H01H9/56—Circuit arrangements not adapted to a particular application of the switching device and for which no provision exists elsewhere for ensuring operation of the switch at a predetermined point in the AC cycle
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/30—Structural association of asynchronous induction motors with auxiliary electric devices influencing the characteristics of the motor or controlling the motor, e.g. with impedances or switches

Definitions

  • This invention relates to new and useful improvements in brushes arranged to wipe over terminals of selector switches, and more particularly to arrangements for centering such brushes on the terminals.
  • Fig. 1 is a plan view of a brush unit
  • Fig. 2 is a section along the lines 22 of Fig. 1.
  • a brush unit consists of a brush mounting frame or spacer I of fiber or other suitable insulating material having a central opening 2, and two lateral mounting prongs or trunnions 3, 4 by means of which spacer I may be mounted in a brush carriage, not here shown but fully described in my copending application No. 697,148, filed September 14, 1946, which was issued as Patent No. 2,565,480 on August 28, 1951.
  • the spacer supports a brush wiper consisting of two distinct complementary segments 5 and 5 of suitably tempered spring material, e. g. Phosphor bronze.
  • the parts of the under side of the assembly are indicated in Figure 2 with primed reference numerals agreeing with the ref erence numerals of the corresponding parts of the upper side.
  • each segment has a first restricted contact tip I which engages a feeder strip 8 and a second restricted contact tip 9 for successively engaging evenly spaced terminal pins I0 projecting from a terminal bank II of a selector.
  • Feeder strip 8 passes between the first tips I and terminal pins it) pass between the second tips 9 of the wiper.
  • Each complementary segment 5, 6 comprises triangular sections I2 and I3 which lie between the contacting tips and centrally depressed areas or waists I4, I5 of the segments. Waists I4, I5 contact one another and extend laterally to form tabs or wings I6, I! on one segment in juxtaposed relationship to corresponding wings on the complementary segment.
  • the complementary brush segments are secured to one another by means of metal bars I8, I9 which contact waist portions I4, I5 in opening 2 and are fastened to one another by rivets 20, 2I passing through wings I6, I1. End portions 22, 23 of each of the bars are pressed against the opposite longitudinal ends of spacer I surrounding opening 2. Segments 5 and 6 are, therefore, accurately positioned with respect to one another and to spacer I by means of bars I8, I9.
  • each complementary brush segment As shown at 24 the edge portions of each complementary brush segment are upturned thereby giving added stiffness to the segments and pre venting warping or decrease of pressure exerted by the segments at their contacting tips.
  • pairs of metal guide members 25, 26 are fastened by rivets 21, 28 to either side of the spacer I adjacent the sides of triangular portion I3 and complementary portion I3.
  • the guide members do not project as far from the side of spacer I as the wiper and engage the terminals above points of engagement by tip 9.
  • Each guide member consists of a metal plate having a restricted contact making portion, such as 29, 38 shown for plates 25, 26.
  • These contact making portions of the guide plate engage pins II! in a manner similar to the contact making portions of the brush segments except that, as above stated, the plates contact the pins near their upper ends or tips and the wiper farther down.
  • the spacing between the contact points 29, Bil of the plates 25, 26 and the wiper tip 9 is such that when tip 9 of the wiper is centered on a terminal pin III, contact making portions 29, 3% of the guide plates do not make contact with any pins 1B, and when contact making portions 29, 30 of the guide plates contact pins I 0, contact tip 9 of the wiper does not contact a pin.
  • the guide plates perform their function of guiding and supporting the brush unit only during those periods of time when it is necessary, i. e. when the wiper is not centered on a terminal.
  • the guides. are out of engagement with the terminal pins whereby the contact between the terminal pin and the wiper is determined solely by the resiliency of the latter and cannot be disturbed by one of the guides which through the spacer might tend to move the wiper with respect to the terminal pin.
  • a brush unit for selector switches having feeder strips and terminal pins, a spacer of insulating material, a brush wiper on each side of said spacer and fastened thereto, each wiper having a first and a second contact making end formed to engage a feeder strip and the terminal pins respectively, and metal guiding means fastened to the spacer and electrically insulated from said brush wipers, said metal guiding means projecting into cooperative relationship with the terminal pins.
  • the guiding means comprise metal plates fastened to each side of the spacer adjacent the second ends of the wipers, each plate having a contact making portion cooperating with the pins, the contact making portions of the wipers and plates engaging different portions of the pins.
  • a brush unit for selector switches having spaced terminal pins, a wiper arranged successively to wipe over the pins, an insulating mounting frame for the wiper, and a metal guide means for said wiper fastened to the frame and engaging the pins only when the wiper does not, and vice versa.
  • a spacer of insulating material having a central opening, a brush wiper on each side of said spacer, each wiper having a first and a second contact making end projecting from the spacer and formed to engage a feeder strip and the terminal pins respectively, each wiper further having a central portion within the opening in the spacer and a metal bar contacting with and fastened to the central portion of each wiper within the opening in said spacer and having end portions projecting beyond the opening and'overlying the spacer at opposing ends of the central opening within said insulatin spacer.
  • the brush unit according to claim 12 and trunnions for mounting the spacer integral with and projecting from the spacer.
  • a spacer of insulating material having a central opening, mounting trunnions integral with and laterally projecting from the side edges of the spacer, a brush wiper on each side of said spacer, each wiper having a first and a second restricted contact making end projecting beyond the upper and the lower edges of the spacer and formed to engage a feeder strip and the terminal pins, respectively, each wiper further having a waist portion contacting within the opening of the spacer the corresponding portion of the other wiper, lateral wings projecting from each waist portion within said opening, triangular sections joining the ends of each wiper with the waist portion, the triangular sections and the ends having upturned stiffening edges, a metal guide fastened to each side of the spacer at its lower edge on each side of but spaced from the wiper and projecting into cooperative relationship with the terminal pins wiping over them nearer their tips than the second contact making end of the wiper, a metal bar contacting the waist portion of each wipe

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Brushes (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
US35201A 1945-04-06 1948-06-25 Selector switch brush Expired - Lifetime US2591683A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
BE489532D BE489532A (enrdf_load_stackoverflow) 1948-06-25
DES7872D DE892621C (de) 1945-04-06 1945-04-06 Einrichtung zum Umschalten von Wicklungen und Wicklungsteilen von Wechselstrommaschinen
US35201A US2591683A (en) 1948-06-25 1948-06-25 Selector switch brush
GB8907/49A GB670347A (en) 1948-06-25 1949-04-01 Selector switch brushes
FR986388D FR986388A (fr) 1948-06-25 1949-05-20 Balais notamment pour organes à contact électrique glissant tels que chercheurs, sélecteurs, etc.
CH292259D CH292259A (fr) 1948-06-25 1949-06-20 Dispositif à balais pour organe de contact électrique glissant.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US35201A US2591683A (en) 1948-06-25 1948-06-25 Selector switch brush

Publications (1)

Publication Number Publication Date
US2591683A true US2591683A (en) 1952-04-08

Family

ID=21881267

Family Applications (1)

Application Number Title Priority Date Filing Date
US35201A Expired - Lifetime US2591683A (en) 1945-04-06 1948-06-25 Selector switch brush

Country Status (5)

Country Link
US (1) US2591683A (enrdf_load_stackoverflow)
BE (1) BE489532A (enrdf_load_stackoverflow)
CH (1) CH292259A (enrdf_load_stackoverflow)
FR (1) FR986388A (enrdf_load_stackoverflow)
GB (1) GB670347A (enrdf_load_stackoverflow)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1880775A (en) * 1929-08-17 1932-10-04 Weber Electric Company Electrical switch
GB558416A (en) * 1942-02-02 1944-01-04 Standard Telephones Cables Ltd Selector switch
US2343100A (en) * 1942-10-16 1944-02-29 Bell Telephone Labor Inc Panel selector contact shoe
US2347727A (en) * 1942-10-16 1944-05-02 Bell Telephone Labor Inc Panel selector contact shoe
US2457589A (en) * 1946-12-18 1948-12-28 Bell Telephone Labor Inc Wiper assembly for step-by-step switches

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1880775A (en) * 1929-08-17 1932-10-04 Weber Electric Company Electrical switch
GB558416A (en) * 1942-02-02 1944-01-04 Standard Telephones Cables Ltd Selector switch
US2343100A (en) * 1942-10-16 1944-02-29 Bell Telephone Labor Inc Panel selector contact shoe
US2347727A (en) * 1942-10-16 1944-05-02 Bell Telephone Labor Inc Panel selector contact shoe
US2457589A (en) * 1946-12-18 1948-12-28 Bell Telephone Labor Inc Wiper assembly for step-by-step switches

Also Published As

Publication number Publication date
GB670347A (en) 1952-04-16
BE489532A (enrdf_load_stackoverflow) 1949-06-10
FR986388A (fr) 1951-07-31
CH292259A (fr) 1953-07-31

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