US3355610A - Slot wedge for rotatable electrical devices - Google Patents

Slot wedge for rotatable electrical devices Download PDF

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Publication number
US3355610A
US3355610A US305470A US30547063A US3355610A US 3355610 A US3355610 A US 3355610A US 305470 A US305470 A US 305470A US 30547063 A US30547063 A US 30547063A US 3355610 A US3355610 A US 3355610A
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slot
wedge
slot wedge
wedges
winding
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US305470A
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Jack W Staff
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G I CO
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G I CO
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/48—Fastening of windings on the stator or rotor structure in slots
    • H02K3/487—Slot-closing devices

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  • My invention relates to a slot wedge for rotatable electrical devices such as the rotatable members of dynamoelectric machines, such as armatures, rotors, etc. and relates more particularly to improved means for securing the same in predetermined position and locking the same against movement in use.
  • An object of my invention is to particularly provide improved slot wedges for rotatable electrical devices for use in commutator-type motors and providing improved locking means for locking the said slot Wedges in place.
  • a further object of my invention is to provide improved slot wedges and locking means of the type referred to which are economical in manufacture, easily assembled and highly efficient in use.
  • FIGURE 1 is a perspective view of a rotatable armature member showing the slot wedges of my invention in place;
  • FIGURE 2 is an enlarged view of a part of the armature illustrated in FIGURE 1 showing the slot wedge of my invention locked in position with a star-shaped end insulator;
  • FIGURE 3 is a perspective view of the improved slot wedge of my invention drawn to reduced scale
  • FIGURE 4 is a plan view of a part of the star-shaped insulator of FIGURES 1 and 2 and shows the preferred relative positioning and size of the same with respect to the armature laminations covered thereby.
  • I show a dynamo-electric machine provided with a laminated core having winding slots 11 therein and mounted on a supporting shaft 12.
  • the armature is provided with a winding 13 extending through the winding slots 11 and connected to a commutator (not shown).
  • the sides of the winding are preferably placed in insulating slot cells 15 lining the slots 11 and are retained therein by the improved slot wedges 1d of my invention which are wedged over the winding, fitting snugly over the same.
  • the slot wedges 16 are of unique construction consisting of a rectangular flat slot stick member 17 of slightly greater width than the mouth X of the slot, said stick member having a pair of Wings 18 angled obliquely at either side relative thereto and disposed at the outermost end thereof, each of said wings being provided with a preferably U-shaped notch 18 and inwardly tapered lowermost sides 19, said notches being in alignment.
  • the slot wedges 16 are adapted to have their notched ends snapped into locking engagement with teeth 20 of a star-shaped insulating end piece 21 positioned at the end of the armature 10 opposite the commutator end thereof, as shown in FIGURES 1 and 2.
  • the teeth 20, as illustrated in FIGURE 4, have tips 20" preferably of greater depth than the tip ends of the armature teeth 14 and said tips overlap portions of the mouth X of the armature slot 11.
  • These tips 24) are, however, shown as preferably of lesser width than the teeth 20' of the core 11 and terminate, in the form shown, radially inwardly of the ends of the teeth of the armature.
  • the slot wedges terminate, in the form shown herein, short of the commutator end of the armature slots and after being wedged into position in the slots, are securely locked in place by the seating of the star insulator Within the notch 8 of the winged portions of the wedges, whereby the wedge is prevented from further longitudinal movement in the slot.
  • the interengagement or lockings of shoulders 22 of the notch with the star insulator 21 determines the position of the slot Wedge within the slot and prevents movement or loosening thereof, in operation.
  • the star or end insulator piece 21 and the slot wedges 16 are preferably of fiber or other insulating material.
  • a slot wedge for use in a winding slot in a dynamoelectric rotatable member, said slot wedge adapted to be arranged over a winding in said slot, said slot wedge consisting of a rectangular stick member having a pair of laterally extending wing portions adapted to project beyond said slot, each said wing portion being provided with a notch therein, an end insulator member having a plurality of teeth extending radially and outwardly thereof, said end insulator member being positioned flush with an end of said rotatable member, the notches in said slot 'wedge wing portions receiving teeth of said end insulator member, locking the wedge in said slot.
  • slot wedges for use in winding slots in a dynamoelectric rotatable member having windings in said slots, said slot wedges adapted to be arranged over said windings in the slots, each wedge having a pair of laterally extending wing portions adapted to project outwardly from an end of said slot, each said wing portion being provided with a U-shaped notch therein, a star-shaped end insulator member positioned flush with said end of said slotted rotatable member, said insulator member being locked in said position by seating of teeth thereof in said notches and said wedges being locked in engagement within the slots, said insulator member and said wedges being in interlocked engagement.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Insulation, Fastening Of Motor, Generator Windings (AREA)

Description

Nov. 28, 1967 J. w. STAFF 3,3 0 v SLOT WEDGE FOR ROTATABLE ELE CCCCCCCCCCCC ES United States Patent 3,355,61 51.01 WEDGE FUR ROTATABLE ELEQTRICAL BEVIUES Jack W. Stud, Eiyria, Ohio, assignor, by mesne assignments, to The G. 1. Company, Eiyria, Ghio, a corporation of Ohio Filed Aug. 29, 1963, Ser. No. 385,470 4 Ciaims. (ill. 3111-214) My invention relates to a slot wedge for rotatable electrical devices such as the rotatable members of dynamoelectric machines, such as armatures, rotors, etc. and relates more particularly to improved means for securing the same in predetermined position and locking the same against movement in use.
An object of my invention is to particularly provide improved slot wedges for rotatable electrical devices for use in commutator-type motors and providing improved locking means for locking the said slot Wedges in place.
A further object of my invention is to provide improved slot wedges and locking means of the type referred to which are economical in manufacture, easily assembled and highly efficient in use.
Further objects of my invention and the invention itself will become more readily apparent from a review of the following description, in which description reference will be made to the accompanying drawings, in which drawings:
FIGURE 1 is a perspective view of a rotatable armature member showing the slot wedges of my invention in place;
FIGURE 2 is an enlarged view of a part of the armature illustrated in FIGURE 1 showing the slot wedge of my invention locked in position with a star-shaped end insulator;
FIGURE 3 is a perspective view of the improved slot wedge of my invention drawn to reduced scale;
FIGURE 4 is a plan view of a part of the star-shaped insulator of FIGURES 1 and 2 and shows the preferred relative positioning and size of the same with respect to the armature laminations covered thereby.
Referring to the drawings, in all of which like parts are designated by like reference characters, I show a dynamo-electric machine provided with a laminated core having winding slots 11 therein and mounted on a supporting shaft 12. The armature is provided with a winding 13 extending through the winding slots 11 and connected to a commutator (not shown). The sides of the winding are preferably placed in insulating slot cells 15 lining the slots 11 and are retained therein by the improved slot wedges 1d of my invention which are wedged over the winding, fitting snugly over the same.
The slot wedges 16 are of unique construction consisting of a rectangular flat slot stick member 17 of slightly greater width than the mouth X of the slot, said stick member having a pair of Wings 18 angled obliquely at either side relative thereto and disposed at the outermost end thereof, each of said wings being provided with a preferably U-shaped notch 18 and inwardly tapered lowermost sides 19, said notches being in alignment. The slot wedges 16 are adapted to have their notched ends snapped into locking engagement with teeth 20 of a star-shaped insulating end piece 21 positioned at the end of the armature 10 opposite the commutator end thereof, as shown in FIGURES 1 and 2. The teeth 20, as illustrated in FIGURE 4, have tips 20" preferably of greater depth than the tip ends of the armature teeth 14 and said tips overlap portions of the mouth X of the armature slot 11. These tips 24) are, however, shown as preferably of lesser width than the teeth 20' of the core 11 and terminate, in the form shown, radially inwardly of the ends of the teeth of the armature.
3,355,618 Patented Nov. 28, 1867 As best shown in FIGURES 1 and 2, an outermost end of the winged portions 18 of each of the slot wedges 16 and the notched portions thereof project beyond the ends of the slots, the notches seating the teeth of the star insulator therein, and those portions of the wings of the slot wedge below the notched portions are bent inwardly to conform to the formation of the walls of the slots and the slot cells surrounding the same.
It is to be noted that the slot wedges terminate, in the form shown herein, short of the commutator end of the armature slots and after being wedged into position in the slots, are securely locked in place by the seating of the star insulator Within the notch 8 of the winged portions of the wedges, whereby the wedge is prevented from further longitudinal movement in the slot. Hence the interengagement or lockings of shoulders 22 of the notch with the star insulator 21 determines the position of the slot Wedge within the slot and prevents movement or loosening thereof, in operation.
The star or end insulator piece 21 and the slot wedges 16 are preferably of fiber or other insulating material.
Although the form of the embodiment of my invention as herein illustrated and described as preferable, it will be understood that various modifications, etc. might be made therein, without however, departing from the spirit of my invention and the scope of the appended claims.
What I claim is:
1. A slot wedge for use in a winding slot in a dynamoelectric rotatable member, said slot wedge adapted to be arranged over a winding in said slot, said slot wedge consisting of a rectangular stick member having a pair of laterally extending wing portions adapted to project beyond said slot, each said wing portion being provided with a notch therein, an end insulator member having a plurality of teeth extending radially and outwardly thereof, said end insulator member being positioned flush with an end of said rotatable member, the notches in said slot 'wedge wing portions receiving teeth of said end insulator member, locking the wedge in said slot.
2. Slot wedges for use in winding slots in a dynamoelectric rotatable member having windings in said slots, said slot wedges adapted to be arranged over said windings in the slots, each wedge having a pair of laterally extending wing portions adapted to project outwardly from an end of said slot, each said wing portion being provided with a U-shaped notch therein, a star-shaped end insulator member positioned flush with said end of said slotted rotatable member, said insulator member being locked in said position by seating of teeth thereof in said notches and said wedges being locked in engagement within the slots, said insulator member and said wedges being in interlocked engagement.
3. Slot wedges as claimed in claim 1 characterized by the said teeth of the insulator member being disposed in overlapping relation to the mouth of said slots.
4. Slot Wedges as claimed in claim 1 characterized by the wing portions having radially outward tapered portions wedged into engagement with the slot walls.
References Cited UNITED STATES PATENTS 1,519,861 12/1924 McEldowney 310265 2,283,146 5/ 1942 Zoller 3 10214 2,381,533 8/1942 Forss 310--233 2,831,991 4/1958 Perkins 310 234 2,998,540 8/1961 Phillips 310214 2,745,030 5/ 6 Baldwin 310-214 MILTON O. I-IIRSHFIELD, Primary Examiner.
MAX L. LEVY, Examiner.
J. W. GIBBS, J. J. SWARTZ, Assistant Examiners.

Claims (1)

1. A SLOT WEDGE FOR USE IN A WINDING SLOT IN A DYNAMOELECTRIC ROTATABLE MEMBER, SAID SLOT WEDGE ADAPTED TO BE ARRANGED OVER A WINDING IN SAID SLOT, SAID SLOT WEDGE CONSISTING OF A RECTANGULAR STICK MEMBER HAVING A PAIR OF LATERALLY EXTENDING WING PORTIONS ADAPTED TO PROJECT BEYOND SAID SLOT, EACH SAID WING PORTION BEING PROVIDED WITH A NOTCH THEREIN, AN END INSULATOR MEMBER HAVING A
US305470A 1963-08-29 1963-08-29 Slot wedge for rotatable electrical devices Expired - Lifetime US3355610A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3519862A (en) * 1968-10-25 1970-07-07 Ind Products Inc Insulating wedge for core slots in dynamoelectric machines and the like and machine for making the same
US3882336A (en) * 1973-12-03 1975-05-06 Briggs & Stratton Corp Electric motor armature core
FR2425167A1 (en) * 1978-05-06 1979-11-30 Fischbach Lueftungstech KEY FOR CLOSING THE GROOVES OF PACKAGES OF STATOR SHEETS OF ELECTRIC MACHINES
US4432135A (en) * 1978-11-30 1984-02-21 General Electric Company Method of locking conductors in a dynamoelectric machine rotor
US4433262A (en) * 1978-11-30 1984-02-21 General Electric Company Method of locking conductors in a dynamoelectric machine rotor and rotor having locked conductors
US5068563A (en) * 1990-10-09 1991-11-26 Milwaukee Electric Tool Corporation Tab insulators for insulating armature core slots
US6188158B1 (en) * 1999-09-13 2001-02-13 Emerson Electric Co. Self-locking retaining member for use in a dynamoelectric device
US6727634B2 (en) 2001-08-30 2004-04-27 Honeywell International, Inc. System and method for end turn retention on a high speed generator rotor
US6734585B2 (en) 2001-11-16 2004-05-11 Honeywell International, Inc. Rotor end caps and a method of cooling a high speed generator
US6753637B2 (en) 2001-09-07 2004-06-22 Honeywell International, Inc. Exciter rotor assembly
US6791230B2 (en) 2001-09-07 2004-09-14 Honeywell International, Inc. System and method for retaining wedges in a rotor
US6859019B2 (en) 2001-08-30 2005-02-22 Honeywell International, Inc. System and method for coupling rectifiers of an exciter to the rotor of a main generator

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1519861A (en) * 1922-03-04 1924-12-16 Sparks Withington Co Armature
US2283146A (en) * 1941-01-31 1942-05-12 Gen Electric Dynamoelectric machine
US2391533A (en) * 1944-05-29 1945-12-25 Automatic Elect Lab Substation circuit
US2745030A (en) * 1952-09-03 1956-05-08 Gen Electric Dynamoelectric machine core member and method of making same
US2831991A (en) * 1956-06-13 1958-04-22 Singer Mfg Co Dynamoelectric machine armatures
US2998540A (en) * 1959-09-24 1961-08-29 Emerson Electric Mfg Co Winding insulators

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1519861A (en) * 1922-03-04 1924-12-16 Sparks Withington Co Armature
US2283146A (en) * 1941-01-31 1942-05-12 Gen Electric Dynamoelectric machine
US2391533A (en) * 1944-05-29 1945-12-25 Automatic Elect Lab Substation circuit
US2745030A (en) * 1952-09-03 1956-05-08 Gen Electric Dynamoelectric machine core member and method of making same
US2831991A (en) * 1956-06-13 1958-04-22 Singer Mfg Co Dynamoelectric machine armatures
US2998540A (en) * 1959-09-24 1961-08-29 Emerson Electric Mfg Co Winding insulators

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3519862A (en) * 1968-10-25 1970-07-07 Ind Products Inc Insulating wedge for core slots in dynamoelectric machines and the like and machine for making the same
US3882336A (en) * 1973-12-03 1975-05-06 Briggs & Stratton Corp Electric motor armature core
FR2425167A1 (en) * 1978-05-06 1979-11-30 Fischbach Lueftungstech KEY FOR CLOSING THE GROOVES OF PACKAGES OF STATOR SHEETS OF ELECTRIC MACHINES
US4432135A (en) * 1978-11-30 1984-02-21 General Electric Company Method of locking conductors in a dynamoelectric machine rotor
US4433262A (en) * 1978-11-30 1984-02-21 General Electric Company Method of locking conductors in a dynamoelectric machine rotor and rotor having locked conductors
US5068563A (en) * 1990-10-09 1991-11-26 Milwaukee Electric Tool Corporation Tab insulators for insulating armature core slots
US6188158B1 (en) * 1999-09-13 2001-02-13 Emerson Electric Co. Self-locking retaining member for use in a dynamoelectric device
US6727634B2 (en) 2001-08-30 2004-04-27 Honeywell International, Inc. System and method for end turn retention on a high speed generator rotor
US6859019B2 (en) 2001-08-30 2005-02-22 Honeywell International, Inc. System and method for coupling rectifiers of an exciter to the rotor of a main generator
US6753637B2 (en) 2001-09-07 2004-06-22 Honeywell International, Inc. Exciter rotor assembly
US6791230B2 (en) 2001-09-07 2004-09-14 Honeywell International, Inc. System and method for retaining wedges in a rotor
US6734585B2 (en) 2001-11-16 2004-05-11 Honeywell International, Inc. Rotor end caps and a method of cooling a high speed generator

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