CA1053770A - Electrical connector to terminate motor field coil wires - Google Patents
Electrical connector to terminate motor field coil wiresInfo
- Publication number
- CA1053770A CA1053770A CA243,672A CA243672A CA1053770A CA 1053770 A CA1053770 A CA 1053770A CA 243672 A CA243672 A CA 243672A CA 1053770 A CA1053770 A CA 1053770A
- Authority
- CA
- Canada
- Prior art keywords
- contact
- plate
- slots
- wire
- cavity
- 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
Links
Landscapes
- Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
Abstract
ABSTRACT
An electrical connector comprising an insulating housing moulded of plastics material with a contact-receiving cavity open at a top, the walls of which cavity are formed with two aligned wire-receiving slots which extend downwardly from the top, a stuffer member upstanding from the floor of the cavity at a location between the slots and a contact stamped and formed from a single piece of sheet metal stock with two opposed plates having aligned wire-receiving slots, at least one of which is core-contacting, the slots having blind ends in the plates and opening out at mouths at one end of the plates to extend between transverse portions connecting the plates together at the one end, the other end of at least one plate being adapted for connection to another wire, the contact being receivable with the one end leading as an interference fit in the cavity with all the slots in alignment and the stuffer extending between the transverse portions of the contact. The invention includes the contact per se.
An electrical connector comprising an insulating housing moulded of plastics material with a contact-receiving cavity open at a top, the walls of which cavity are formed with two aligned wire-receiving slots which extend downwardly from the top, a stuffer member upstanding from the floor of the cavity at a location between the slots and a contact stamped and formed from a single piece of sheet metal stock with two opposed plates having aligned wire-receiving slots, at least one of which is core-contacting, the slots having blind ends in the plates and opening out at mouths at one end of the plates to extend between transverse portions connecting the plates together at the one end, the other end of at least one plate being adapted for connection to another wire, the contact being receivable with the one end leading as an interference fit in the cavity with all the slots in alignment and the stuffer extending between the transverse portions of the contact. The invention includes the contact per se.
Description
~(~53770 The invention relates to electrical connectors.
An electrical connector according to the invention comprises an electrically insulating housing moulded of plastics material with a contact-receiving cavity open at a top, two opposed walls of which cavity are each formed with a respective one of two aligned wire-receiving slots which extend downwardly from the top, a stuffer member upstanding from the floor of the cavity at a location between the slots, and a contact stamped and formed from a single piece of sheet metal stock with two opposed plates each having a respective one of two aligned wire-receiving slots, at least one of the slots being adapted to establish electrical connection with a wire when inserted therein, the slots each having a blind end in the respective plate and opening out at a mouth at one end of the respective plate to extend between transverse portions connecting the plates together at the one end, a tang being provided on an edge of one or both opposed plates, the other end of one plate being adapted for connection to another wire, the contact being receivable with the one end leading as an interference fit in the cavity with the tang in engagement with a cavity wall and all the slots in alignment, the stuffer, extending between the transverse portions of the contact.
According to the invention there is also provided a contact for use in the above connector which contact is
An electrical connector according to the invention comprises an electrically insulating housing moulded of plastics material with a contact-receiving cavity open at a top, two opposed walls of which cavity are each formed with a respective one of two aligned wire-receiving slots which extend downwardly from the top, a stuffer member upstanding from the floor of the cavity at a location between the slots, and a contact stamped and formed from a single piece of sheet metal stock with two opposed plates each having a respective one of two aligned wire-receiving slots, at least one of the slots being adapted to establish electrical connection with a wire when inserted therein, the slots each having a blind end in the respective plate and opening out at a mouth at one end of the respective plate to extend between transverse portions connecting the plates together at the one end, a tang being provided on an edge of one or both opposed plates, the other end of one plate being adapted for connection to another wire, the contact being receivable with the one end leading as an interference fit in the cavity with the tang in engagement with a cavity wall and all the slots in alignment, the stuffer, extending between the transverse portions of the contact.
According to the invention there is also provided a contact for use in the above connector which contact is
- 2 -stamped and formed from a single piece of sheet metal stock with two opposed plates each having a respective one of two aligned wire-receiving slots, at least one of the slots being adapted to establish electrical connection with a wire when inserted therein, the slots each having a blind end in the respective plate and opening out at a mouth at one end of the plate to extend between transverse portions connecting the plates together at the one end, the other end of one plate being adapted for connection to another wire, a tang being provided on an edge of one or both opposed plates.
A particular application of the invention is the termination of wires of a coil for example of a field coil of an electric motor.
Specific examples of the invention will now be described with reference to the accompanying drawings in which:-Figure 1 is a perspective view of a field coil assembly of an electric motor having an electrical connector mounted thereon;
Figure 2 is a fragmentary perspective view of the electrical connector;
Figure 3 is a perspective view of the contact of the connector;
Figures 4 to 7 are perspective views of other examples of contacts;
Figure 8 is a fragmentary perspective view of
A particular application of the invention is the termination of wires of a coil for example of a field coil of an electric motor.
Specific examples of the invention will now be described with reference to the accompanying drawings in which:-Figure 1 is a perspective view of a field coil assembly of an electric motor having an electrical connector mounted thereon;
Figure 2 is a fragmentary perspective view of the electrical connector;
Figure 3 is a perspective view of the contact of the connector;
Figures 4 to 7 are perspective views of other examples of contacts;
Figure 8 is a fragmentary perspective view of
3 --another exa~ple of connector.
The assembl~ of Figure 1 includes a laminated iron core 11 forming pole pieces around which are wound coils 13 lnsulated from the core by insulating sheets 12. An annular connector housing 14 integrally moulded from plastics material is secured on one end of the core both by pins 15 on the housing base, which pins project into lamination alignment holes formed in the core during manufacture, and by the coils. The housing is formed with a series of box-like structures 16 defining contact-receiving cavities open at a top, one pair of opposed walls of the cavities being formed with aligned wire gripping slots which extend downwardly from an upper edge of each wall. A
rectangular wire stuffer 18 upstands from the cavity floor between the slots 17.
The contact 19 received in each cavity is stamped and formed from a single piece of sheet metal stock and comprises two opposed plates 21 (Figures 2 and 3) having aligned wire-receiving slots 23 which open out to define wire-receiving mouths at one end of the plates which ends are joined by transverse portions 22. The other end of one plate is reversely bent to define a contact tongue 24 which extends towards the other plate. A wire-locating V-section depression 25 is stamped in the free end of the tongue. Each plate is provided with two .~.
8633/8~42 pairs of tangs 26, 27, one tang of each pair being located on an opposlte edge of the plate from the other tang of the pair, the pair 26 being adjacent blind ends 32 of the slots 23 and the pair 27 being adjacent the transverse portion 22.
In use the annular connector housing is mounted on the end of the pole pieces by the pins and the coils are then wound. The free ends of the coil wires 28 are inserted in the slots 17 which locate them across the stuffer 18. The contact is then inserted into the cavity so that the stuffer is received between the transverse portions 22 ensuring that the wire 28 is pushed fully along the slots 23 to the blind ends 32 where the wire may remain under some pressure from the stuffer. The edges of the slots 23 penetrate insulation on the wire to connect to the core. The tangs bight into the cavity wall to retain the contact in the cavity. Tangs 27 also urge the slot walls together. Thus, the slot walls can be considered to be cantilever beams and the tangs 26 may function as fulcrums. This feature enables a plurality of coil wires to be retained in the slots reliably connected to the contacts. A lead wire from external circuitry can then be connected to the contact by pushing the lead wire between the free end of the tongue 24 and the adjacent plate 21 so that the wire is gripped between the tongue and plate.
An advantage of the invention is that the assembly 1(~5~770 steps can be carried out automaticall~ and the ends of the coil wires can be located accurately in the housing immediately after the coil has been wound and prior to connection to the lead wire pre~enting the last few turns becoming unwound.
In an alternative example shown in Figure 4, the contact is modified by the provision of a double thickness tab 34 instead of the tongue 24 which tab is perforated at 35, in which perforation a lead wire can be located for soldering.
In the example, shown in Figure 5, a double thickness post around which a lead wire may be wrapped is provided instead of the tab.
In the example shown in Figure 6, the tongue is retained and a tab 37 perforated at 38 extends from the opposite plate and in the example shown in Figure 7 a crimping ferrule replaces the tongue 24.
In the example shown in Figure 8 the transverse portions 41 are folded upwardly to extend on opposite sides of the stuffer assisting in locating the wire on the stuffer.
.~
The assembl~ of Figure 1 includes a laminated iron core 11 forming pole pieces around which are wound coils 13 lnsulated from the core by insulating sheets 12. An annular connector housing 14 integrally moulded from plastics material is secured on one end of the core both by pins 15 on the housing base, which pins project into lamination alignment holes formed in the core during manufacture, and by the coils. The housing is formed with a series of box-like structures 16 defining contact-receiving cavities open at a top, one pair of opposed walls of the cavities being formed with aligned wire gripping slots which extend downwardly from an upper edge of each wall. A
rectangular wire stuffer 18 upstands from the cavity floor between the slots 17.
The contact 19 received in each cavity is stamped and formed from a single piece of sheet metal stock and comprises two opposed plates 21 (Figures 2 and 3) having aligned wire-receiving slots 23 which open out to define wire-receiving mouths at one end of the plates which ends are joined by transverse portions 22. The other end of one plate is reversely bent to define a contact tongue 24 which extends towards the other plate. A wire-locating V-section depression 25 is stamped in the free end of the tongue. Each plate is provided with two .~.
8633/8~42 pairs of tangs 26, 27, one tang of each pair being located on an opposlte edge of the plate from the other tang of the pair, the pair 26 being adjacent blind ends 32 of the slots 23 and the pair 27 being adjacent the transverse portion 22.
In use the annular connector housing is mounted on the end of the pole pieces by the pins and the coils are then wound. The free ends of the coil wires 28 are inserted in the slots 17 which locate them across the stuffer 18. The contact is then inserted into the cavity so that the stuffer is received between the transverse portions 22 ensuring that the wire 28 is pushed fully along the slots 23 to the blind ends 32 where the wire may remain under some pressure from the stuffer. The edges of the slots 23 penetrate insulation on the wire to connect to the core. The tangs bight into the cavity wall to retain the contact in the cavity. Tangs 27 also urge the slot walls together. Thus, the slot walls can be considered to be cantilever beams and the tangs 26 may function as fulcrums. This feature enables a plurality of coil wires to be retained in the slots reliably connected to the contacts. A lead wire from external circuitry can then be connected to the contact by pushing the lead wire between the free end of the tongue 24 and the adjacent plate 21 so that the wire is gripped between the tongue and plate.
An advantage of the invention is that the assembly 1(~5~770 steps can be carried out automaticall~ and the ends of the coil wires can be located accurately in the housing immediately after the coil has been wound and prior to connection to the lead wire pre~enting the last few turns becoming unwound.
In an alternative example shown in Figure 4, the contact is modified by the provision of a double thickness tab 34 instead of the tongue 24 which tab is perforated at 35, in which perforation a lead wire can be located for soldering.
In the example, shown in Figure 5, a double thickness post around which a lead wire may be wrapped is provided instead of the tab.
In the example shown in Figure 6, the tongue is retained and a tab 37 perforated at 38 extends from the opposite plate and in the example shown in Figure 7 a crimping ferrule replaces the tongue 24.
In the example shown in Figure 8 the transverse portions 41 are folded upwardly to extend on opposite sides of the stuffer assisting in locating the wire on the stuffer.
.~
Claims (9)
1. An electrical connector comprising an electrically insulating housing moulded of plastics material with a contact-receiving cavity open at a top, two opposed walls of which cavity are each formed with a respective one of two aligned wire-receiving slots which extend downwardly from the top, a stuffer member upstanding from the floor of the cavity at a location between the slots, and a contact stamped and formed from a single piece of sheet metal stock with two opposed plates each having a respective one of two aligned wire-receiving slots, at least one of the slots being adapted to establish electrical connection with a wire when inserted therein, the slots each having a blind end in the respective plate and opening out at a mouth at one end of the respective plate to extend between transverse portions connecting the plates together at the one end, a tang being provided on an edge of one or both opposed plates, the other end of one plate being adapted for connection to another wire, the contact being receivable with the one end leading as an interference fit in the cavity with the or each tang in engagement with a cavity wall and all the slots in alignment, the stuffer extending between the transverse portions of the contact.
2. An electrical connector according to Claim 1, in which the other end of one of the plates is reversely bent to define a contact tongue having a wire-engaging edge adjacent the other plate.
3. An electrical connector according to Claim 1 or Claim 2, in which each plate is provided with two pairs of the said tangs, one tang of each pair being located on an opposite edge of the plate from the other tang of the pair, the pairs being adjacent the blind end of the contact slot and the transverse portion respectively.
4. An electrical connector according to Claim 1 or Claim 2, in which the transverse portions are bent upwardly to project on opposite sides of the stuffer.
5. An electrical connector according to Claim 1, in which the housing is annular and contact-receiving cavities are formed at predetermined intervals along the housing top.
6. An electrical connector according to Claim 5, in which locating pins are formed at predetermined intervals along the bottom of the housing.
7. A contact for use in a connector according to Claim 1, which contact is stamped and formed from a single piece of sheet metal stock with two opposed plates each having a respective one of two aligned wire-receiving slots, at least one of the slots being adapted to establish electrical connection with a wire when inserted therein, the slots each having a blind end in the respective plate and opening out at a mouth at one end of the plate to extend between transverse portions connecting the plates together at the one end, the other end of one plate being adapted for connection to another wire, a tang being provided on an edge of a plate.
8. A contact according to Claim 7, in which the said other end of one plate is reversely bent to define a contact tongue having a wire-engaging edge adjacent the other plate.
9. A contact according to Claim 7 or 8, in which each plate is provided with two pairs of the said tangs, one tang of each pair being located on an opposite edge of the plate from the other tang of the pair, the pairs being adjacent the blind end of the contact slot and the transverse portion respectively.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US54731875A | 1975-02-05 | 1975-02-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1053770A true CA1053770A (en) | 1979-05-01 |
Family
ID=24184207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA243,672A Expired CA1053770A (en) | 1975-02-05 | 1976-01-16 | Electrical connector to terminate motor field coil wires |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1053770A (en) |
-
1976
- 1976-01-16 CA CA243,672A patent/CA1053770A/en not_active Expired
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