CA1152171A - Transformer with integral cover and terminals - Google Patents
Transformer with integral cover and terminalsInfo
- Publication number
- CA1152171A CA1152171A CA000375542A CA375542A CA1152171A CA 1152171 A CA1152171 A CA 1152171A CA 000375542 A CA000375542 A CA 000375542A CA 375542 A CA375542 A CA 375542A CA 1152171 A CA1152171 A CA 1152171A
- Authority
- CA
- Canada
- Prior art keywords
- cup shaped
- transformer
- electrical
- insulating cover
- cover 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
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- Insulating Of Coils (AREA)
- Coils Of Transformers For General Uses (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A transformer utilizes a cup shaped insulating cover to simultaneously enclose and protect the transformer windings, and mount the electrical terminal means for interconnection of cir-cuitry with the transformer. The cup shaped insulating cover means utilizes slot means from the outer edge of the cup shaped cover means to an intermediate portion as a lead out for the electrical leads from the transformer windings.
A transformer utilizes a cup shaped insulating cover to simultaneously enclose and protect the transformer windings, and mount the electrical terminal means for interconnection of cir-cuitry with the transformer. The cup shaped insulating cover means utilizes slot means from the outer edge of the cup shaped cover means to an intermediate portion as a lead out for the electrical leads from the transformer windings.
Description
7~
TRANSFORMER Wl'~H INTEGRAL COVER A~D 'l~ERMI~J~LS
BP~KGROUND OF THE INVENTION
In the manufacture of transformers, and particularly low voltage control circuit type transformers, it has been common to provide a type of transformer structuee including terminals mounted on an insulating insert attached to a cover or end bell.
The typical low voltage control circuit type of trans-former utilizes a laminated magnetic core or circuit that is ~ interleaved or stacked through a winding form. Most recently, the winding forms are of molded plastic-and provide at least a pair of electrically and mechanically separated winding spaces.
~ The winding spaces are then filled with individual windings for ; the primacy and secondary of the transformer. After the winding ~ foem has been supplied with electrical coils, the laminated .
steucture is either interleaved thcoogh the winding form or is assembled into the winding form and welded to complete the basic core or structure of the transformer. In most low voltage con-trol circuit app1ications it is desirable to have the low voltage : ~ :
tr~ansformer leads connected to screw-type terminals for further 20~ connection into the control circuit.~ Typically, this is done by -leading the low voltage coil ends or leads either to or thcough a lat terminal board that supports;the screw-type terminals. The leads are then soldered or otherwise connected to the terminals snd the~ board is placed in position on a metal snd bell that is 25~ placed over the transormer structure. The end bell supports the ~: :
~ insulated terminal board and holds it firmly in place by means of - :
~ tabs or othe~ retaining means.
- ~ ~
The fabrication of this type of transformer has been ; highly automated. Molded winding forms with special lead-in slots ma~e it possible to automatically wind the primary and sec-- ondary windings on the form. A l-aminated magnetic structure is placed throuyh the form ~nd is welded to complete the magnetic ~ 5~7~
circuit and t'ne necessacy magnetic coupling ~or the transformer.
~t this point the autornated benefits have ceased and the signifi-cant hand labor in bringing the leads out to a terminal board has persisted for many years.
SUMM~Y OF THE INVENTION
The present invention is directed to the replacement of the conventional terminal board and its teeminals with a cup shaped insulating cover that supports the terminals directly, and which can be slipped over the end of the transformer structure in SUch a manner as to allow the leads to pass from the electrical coils to the terminals without the need to pass them through holes which involves a high laboe burden. The present invention -utilizes a cup shaped insulatlng cover means that has slot means in the sides of the cover means that terminated adjacent electric ~15 terminals. The terminals have projections which readily receive the end-of the leads and these projections are areanged so that I
i~ the leads and the terminal projections can be soldered by produc-. : :
tion soldering techniques such as dip soldering or wave-- soldering. ~ -~20 ~ The slots in the cup shaped~covers allow for the lead out of the leads for-~he eléctrical coil means, as well as, providing a convenient lead out for other leads for the trans-forme~ that may not be intended for use with a terminal. ~y providing a proper lead out slot in the cup shaped cover means, 25; leads which are used for field wicing and~ which do not connect directly to termlnals can be provided so that the leads do not have to be threaded through a hole, as is currently the practice.
The present invention also utilizes the cup shaped ,, .
insula~ing cover means as a support for a-~ditional terminals that ¦ 30 can be used as tie points in circuit wiring, as is done with the prior art devices. As such, no penalty is present in the use of , the present idea where auxiliary terminals are used as tie ':
TRANSFORMER Wl'~H INTEGRAL COVER A~D 'l~ERMI~J~LS
BP~KGROUND OF THE INVENTION
In the manufacture of transformers, and particularly low voltage control circuit type transformers, it has been common to provide a type of transformer structuee including terminals mounted on an insulating insert attached to a cover or end bell.
The typical low voltage control circuit type of trans-former utilizes a laminated magnetic core or circuit that is ~ interleaved or stacked through a winding form. Most recently, the winding forms are of molded plastic-and provide at least a pair of electrically and mechanically separated winding spaces.
~ The winding spaces are then filled with individual windings for ; the primacy and secondary of the transformer. After the winding ~ foem has been supplied with electrical coils, the laminated .
steucture is either interleaved thcoogh the winding form or is assembled into the winding form and welded to complete the basic core or structure of the transformer. In most low voltage con-trol circuit app1ications it is desirable to have the low voltage : ~ :
tr~ansformer leads connected to screw-type terminals for further 20~ connection into the control circuit.~ Typically, this is done by -leading the low voltage coil ends or leads either to or thcough a lat terminal board that supports;the screw-type terminals. The leads are then soldered or otherwise connected to the terminals snd the~ board is placed in position on a metal snd bell that is 25~ placed over the transormer structure. The end bell supports the ~: :
~ insulated terminal board and holds it firmly in place by means of - :
~ tabs or othe~ retaining means.
- ~ ~
The fabrication of this type of transformer has been ; highly automated. Molded winding forms with special lead-in slots ma~e it possible to automatically wind the primary and sec-- ondary windings on the form. A l-aminated magnetic structure is placed throuyh the form ~nd is welded to complete the magnetic ~ 5~7~
circuit and t'ne necessacy magnetic coupling ~or the transformer.
~t this point the autornated benefits have ceased and the signifi-cant hand labor in bringing the leads out to a terminal board has persisted for many years.
SUMM~Y OF THE INVENTION
The present invention is directed to the replacement of the conventional terminal board and its teeminals with a cup shaped insulating cover that supports the terminals directly, and which can be slipped over the end of the transformer structure in SUch a manner as to allow the leads to pass from the electrical coils to the terminals without the need to pass them through holes which involves a high laboe burden. The present invention -utilizes a cup shaped insulatlng cover means that has slot means in the sides of the cover means that terminated adjacent electric ~15 terminals. The terminals have projections which readily receive the end-of the leads and these projections are areanged so that I
i~ the leads and the terminal projections can be soldered by produc-. : :
tion soldering techniques such as dip soldering or wave-- soldering. ~ -~20 ~ The slots in the cup shaped~covers allow for the lead out of the leads for-~he eléctrical coil means, as well as, providing a convenient lead out for other leads for the trans-forme~ that may not be intended for use with a terminal. ~y providing a proper lead out slot in the cup shaped cover means, 25; leads which are used for field wicing and~ which do not connect directly to termlnals can be provided so that the leads do not have to be threaded through a hole, as is currently the practice.
The present invention also utilizes the cup shaped ,, .
insula~ing cover means as a support for a-~ditional terminals that ¦ 30 can be used as tie points in circuit wiring, as is done with the prior art devices. As such, no penalty is present in the use of , the present idea where auxiliary terminals are used as tie ':
-2-' ~2~71 points. With the present invention the cup shaped insulating cover means can be attached to the winding support or can be attached directly to the laminated structure of the transformer.
The present invention discloses at least two different varia-tions of cup shaped cover to fulfill various needs in the trans-former art.
In accordance with the present invention there is provided a transformer, including: electrical coil means including at least a pair of magnetically coupled electrical windings with each of said windin~s having input leads; support means for said coil means; cup shaped insulating cover means attached to said support means to enclose said electrical coil means; said insulating cover means having slot means from an outer edge of said cup shaped cover means to an intermediate portion of said cover means; electrical terminal means directly mounted on said insulated cover means adjacent said slot means at said intermediate portion of said cover means; and said terminal means including connection means connected to said input leads of one of said electrical windings to complete an electrical circuit from said terminal means to said one of said windings.
BRIEF DESCR;IP~ION OF THE DRAWIN5S
,; . . , ~ Figure 1 is a top view of a transformerî
::
Figure 2 is a side view of the transformer, Figure 3 is an end view of the transformer;
Figure 4 is a top view of the transformer and relay combined on a single support means;
Figure 5 discloses a cut away of the cup shaped insulating cover mounted by a latch means; and Figure 6 discloses a cup shaped cover which is attach-ed by the rivets or screws that assemble the entire transformer 7~
unit.
DESCRIPTION OF THE PREFERRED EMBODIMENT
In Figures 1, 2 and 3 there is disclosed a top view, front view, and side view of a transformer including the present invention mounted on a junction box cover. This type of unit is used extensively in the powering of control circuits wherein the line voltage side of the transformer is enclosed in a junction box and a low voltage side of the transformer is provided for convenient connection to control circuitry.
In Figures 17 2 and 3 the junction box mounting plate 10 is generally disclosed for the convenient mounting of a transformer 11. The transformer 11 includes a laminated stack of transformer iron 12 that is placed through a winding form 13.
The winding form 13 is provided to support an electric coil means that includes at least a pair of magnetically coupled electrical windings. The prim~ry winding has input leads 14 and 15 while , .
i ^ :
. , ,~ ,, ~,, ~:.
, .
~:`
:
:
,' - 3a ~
the~low voltage o~ control side of the transEormer 11 has input leads 16 and 17. Tne ~erm "input leads" rela~es to the physical structure or function of the leads as o,oposed to their electrical function. The transformer 11 is assembled in a conventional fashion wherein the laminations 12 are mounted through the su~-port means 13 and then are welded at 20 where two portions of the laminations 12 abut one another. This assembly technique is the current state of the art. ~ pair of rivets 21 are disclosed which mount the transformer 11 through a hole in the junction box cover 10~
The transformer 11 has a pair of covers 25 and 26 that - are molded of an insulating material and which are cup shaped in configuration. Each of the cup shaped covees 25 and 26 encloses the electric coils within the transformer 11 by cooperating with . - - -. - , .
,the faces 27 and 28 of the laminations 12. The laminations 12 along,wi,th the winding form,13 form a support means for the cup shaped insulating cover means 25 and 26 so that electric coil means within the transformer 11 is mechanically and electrically enclosed. In the invention disc~losed in,Figures 1, 2, and 3 the 2~ cup shaped insulating cover means 25 and 26 snap onto and attach - to the support means 13 by means of a detent mech~nism that wi-ll be shown in more de~ail in connection with Figure 5. The manner of holding the cup shaped insulating cover means 25 and 26 in place is not crucial to the present invention and will be disclosed in at least two embodiments in connection with Figures 5 and 6. It also shouid be noted that plastic covers to enclose electric coil means of transformers broadly are not considered to be new. Cup shaped insulating cover means have been used on transformer electric coil means to enclose the coils to protect them from mechanical abuse and to enclose the windings to meet fire ratings. However, these covers in the past have performed no other func~ion. The additional function that thesQ covers ~ ~23,~ô 1 perform in the present invention is critical to the economic~l production of control circuit transformers in a hig'nly competi-tive and labor intensive environment. The saving in labor in assembling and manufacturing this type of control transformer is 5 very important.
In Figure 2 it will be noted that each of the cup shaped insulating cover means 25 and 26 include slot means 30 and 31. In each case the slot means 30 and 31 have an opening at the outer edges 32 a~d 33 of the cup shaped cover means. The openings or slots 30 and 31 then extend to an intermedlate portions 34 and 35 of the cup shaped cover means.
In the case of the slots 30, the leads 16 and 17 are fed through the slots as the cover is snapped into place and provide a convenient outlet for the leads 16 and 17 so that they can be connected to terminal means 40, which have been disclosed as screw type of terminals with additional connection means or pro~ections 41. In the disclosure of ~igures 1 through 3, the leads 16 and 17 are wrapped around the connection means portions 41 of the terminal means 40 where they can be conveniently , 20~ soldered by any techniquer ~such as wave soldering, dip soldering or hand soldering.~ The extension of ~he~leads 16 and 17 through ; the slot means 30 in the cover means 25 allows ~he cover means 25 to be conveniently snapped onto the transformer 11 with the slot means 30 guiding the leads 16 and 17 so they can be conveniently ~ wrapped on the connection means 41 of the terminal means 40.
This provides for a very quick assembly operationf as well as, providing for any type of soldering operation that is convenient.
The terminal means 40 are mounted directly on the cover means 25, as opposed to being mounted on an insulating member which is then ~, ~ 30~ In turn supported by the end bell or a mounting means that is ; needed to cover the electric coil means OL the transformer.
,: , ~ -5-~ ~2~1 ~- In connection ~lith the leads la and 15, whish are the line voltage leads for the device, they ha~e been disclosed ~s conventional leads w'nich are brought out through the slot means 31, and which are protected between the edge of the slot means 31 at 35, and the electric coil support means 13. With the applica-tion of the cup shaped insulating cover means 2~, the input leads 14 and 15 are quickly encircled by the slot means 31 and held in an appropeiate position between the edge 35 and the support means 13. This once again allows for quick assembly without the need to thread the input leads 14 and 15 through a hole as is done in conventional transformers.
With the cup shaped insulating cover means disclosed, quick assembly is provided. Since the cup shaped insulating cover means 25 is formed of a single insulating member with the terminal means 4~ mounted directly thereto, it is apparent that a minimum of hand labor is required in getting the input leads 1~
and 17 connected to the terminal means 40. The past practice of having to hand assemble a separate insulating board which mounts the terminals, and hand feeding wires through holes where they must then be hand soldered, has been eIiminated. -In Figure 4 a further modifica~ion of the present invention is disclosed. A junction box cover 10' has been , ~ . . .
disclosed which mounts a relay generally disclosed at 50 and a control circuit transformer 51. The control circuit transformer 51 is held to the plate 10' by clamp like ears 52 that attach the , ~ . .
transformer 51 through a hole (no! shown). The device disclosed in Figure 4 is~similar to a unit for control of fan motors and auxiliary circuits in heating and cooling applications. Such a device is marketed by Honeywell Inc. and known as an R8239 Fan Center. In this type of a device it is not only desirable to mount the relay 50 (which is a conventional relay mounted in a molded plug attached to the cover 10'), but to provide the trans-former 51 ~ith a cup shaped cover means 25' that is sirnilar to the cup shaped c~ver means 25 of Figure 1. The difference is that auxiliary terminals means 53 have been mounted on the cover means 25' and are used as tie points for interconnecting various elements to the fan control device. This is shown where the con-ductors 54 and 55 from the relay 50 have been connected to one of the terminals 53 and the terminal means 40. By providing addi-tional terminals 53 on the cup shaped cover means 25' convenient terminal tie points have been provided. With the terminal means 40 and the connection means 41 peojecting out over the edge of the cup shaped cover means 25', additional space is gained around and between the various terminal means 40 and 53 thereby making it a handy and desirable expedient in the manufacture of the fan control device.
In Figure 5 a cut away portlon of the cup shaped cover means 25 is provided showing the support means or electrical coil winding means 13. A cut away portion 60 is provided showing the top of a winding form at 61 and an indentation 62 that is molded directly into the electrical winding form. This recess in the winding form cooperates with a~tongue (not shown) on the inside of the cut away portion of the cup shaped cover rneans 25 so that when the~cup shaped cover means 25 is placed over the sùpport means 13, that the tongue latches into the detent 62 thereby providing a latch means to hold the cup shaped cover means 25 in place on the support means 13.
In Figure 6 a further embodiment of the present inven-tion is disclosed. A cup shaped cover means 25'' has been disclosed having an additional flange 63 that is molded integrally with the balance of the cup shaped cover means 25`'.
: : :
The flange 63 is attached by a rive-t or bolt 54 to the transorm-er 11. In this configuration, a similar cup shaped cover 26 would be provided witll an appropriate flange corresponding to ~ ,~3~ o ~
fla~ge ~ so that th~ two cu~ s'naped insulating co~Jers ~would h~
held onto the transformer by the rivets 6~ and the flanges 63 rather than by any internal latching mechanism that depended on the electric coil means or support means within the transformer structure itself. In this case the slots 30 of Figure 1 would become slots 30' which extend from the terminal ~.eans 40 to the outer edge ~5 of the flange 63. It can be seen that when the cover means 25'' is placed over the transformer 11 that the input ; leads 16 and 17 could be fed from the edge 65 into the'slots 30' 10 , so that the input leads 16 and 17 could be conveniently wrapped around the connection means 41 of the terminal means 40. A simi-lar configuration can be ,used to lead out and termina~e the high voltage leads 14 and 15 if that i5 desirable by replacing cover means 26 with a second cover means 25'l.
A number of variations of the present invention have been disclosed in great detail. The ut'ilization of this inven-, tion leads to a significant cost reduction in the manufacture of ; control circuit transformers which are utilized~in the heating and cooling industry in large quantity., The production quantities of this type of unit runs into millions of units per year. The savings generated by providing a unitary cup shaped insulating cover that not only protects and encloses the trans-former, but also simultaneously mounts the terminals for the transformer so that the terminals can be soldered by any convenient technique, is substantial~ The present invention has been disclosed in various forms and its application could be var-' ied extensively in view of these teachings. The applicant wishes '~ ~ to be limited in the scope of his invention solely by the scope .~ j of the appended claims.
The present invention discloses at least two different varia-tions of cup shaped cover to fulfill various needs in the trans-former art.
In accordance with the present invention there is provided a transformer, including: electrical coil means including at least a pair of magnetically coupled electrical windings with each of said windin~s having input leads; support means for said coil means; cup shaped insulating cover means attached to said support means to enclose said electrical coil means; said insulating cover means having slot means from an outer edge of said cup shaped cover means to an intermediate portion of said cover means; electrical terminal means directly mounted on said insulated cover means adjacent said slot means at said intermediate portion of said cover means; and said terminal means including connection means connected to said input leads of one of said electrical windings to complete an electrical circuit from said terminal means to said one of said windings.
BRIEF DESCR;IP~ION OF THE DRAWIN5S
,; . . , ~ Figure 1 is a top view of a transformerî
::
Figure 2 is a side view of the transformer, Figure 3 is an end view of the transformer;
Figure 4 is a top view of the transformer and relay combined on a single support means;
Figure 5 discloses a cut away of the cup shaped insulating cover mounted by a latch means; and Figure 6 discloses a cup shaped cover which is attach-ed by the rivets or screws that assemble the entire transformer 7~
unit.
DESCRIPTION OF THE PREFERRED EMBODIMENT
In Figures 1, 2 and 3 there is disclosed a top view, front view, and side view of a transformer including the present invention mounted on a junction box cover. This type of unit is used extensively in the powering of control circuits wherein the line voltage side of the transformer is enclosed in a junction box and a low voltage side of the transformer is provided for convenient connection to control circuitry.
In Figures 17 2 and 3 the junction box mounting plate 10 is generally disclosed for the convenient mounting of a transformer 11. The transformer 11 includes a laminated stack of transformer iron 12 that is placed through a winding form 13.
The winding form 13 is provided to support an electric coil means that includes at least a pair of magnetically coupled electrical windings. The prim~ry winding has input leads 14 and 15 while , .
i ^ :
. , ,~ ,, ~,, ~:.
, .
~:`
:
:
,' - 3a ~
the~low voltage o~ control side of the transEormer 11 has input leads 16 and 17. Tne ~erm "input leads" rela~es to the physical structure or function of the leads as o,oposed to their electrical function. The transformer 11 is assembled in a conventional fashion wherein the laminations 12 are mounted through the su~-port means 13 and then are welded at 20 where two portions of the laminations 12 abut one another. This assembly technique is the current state of the art. ~ pair of rivets 21 are disclosed which mount the transformer 11 through a hole in the junction box cover 10~
The transformer 11 has a pair of covers 25 and 26 that - are molded of an insulating material and which are cup shaped in configuration. Each of the cup shaped covees 25 and 26 encloses the electric coils within the transformer 11 by cooperating with . - - -. - , .
,the faces 27 and 28 of the laminations 12. The laminations 12 along,wi,th the winding form,13 form a support means for the cup shaped insulating cover means 25 and 26 so that electric coil means within the transformer 11 is mechanically and electrically enclosed. In the invention disc~losed in,Figures 1, 2, and 3 the 2~ cup shaped insulating cover means 25 and 26 snap onto and attach - to the support means 13 by means of a detent mech~nism that wi-ll be shown in more de~ail in connection with Figure 5. The manner of holding the cup shaped insulating cover means 25 and 26 in place is not crucial to the present invention and will be disclosed in at least two embodiments in connection with Figures 5 and 6. It also shouid be noted that plastic covers to enclose electric coil means of transformers broadly are not considered to be new. Cup shaped insulating cover means have been used on transformer electric coil means to enclose the coils to protect them from mechanical abuse and to enclose the windings to meet fire ratings. However, these covers in the past have performed no other func~ion. The additional function that thesQ covers ~ ~23,~ô 1 perform in the present invention is critical to the economic~l production of control circuit transformers in a hig'nly competi-tive and labor intensive environment. The saving in labor in assembling and manufacturing this type of control transformer is 5 very important.
In Figure 2 it will be noted that each of the cup shaped insulating cover means 25 and 26 include slot means 30 and 31. In each case the slot means 30 and 31 have an opening at the outer edges 32 a~d 33 of the cup shaped cover means. The openings or slots 30 and 31 then extend to an intermedlate portions 34 and 35 of the cup shaped cover means.
In the case of the slots 30, the leads 16 and 17 are fed through the slots as the cover is snapped into place and provide a convenient outlet for the leads 16 and 17 so that they can be connected to terminal means 40, which have been disclosed as screw type of terminals with additional connection means or pro~ections 41. In the disclosure of ~igures 1 through 3, the leads 16 and 17 are wrapped around the connection means portions 41 of the terminal means 40 where they can be conveniently , 20~ soldered by any techniquer ~such as wave soldering, dip soldering or hand soldering.~ The extension of ~he~leads 16 and 17 through ; the slot means 30 in the cover means 25 allows ~he cover means 25 to be conveniently snapped onto the transformer 11 with the slot means 30 guiding the leads 16 and 17 so they can be conveniently ~ wrapped on the connection means 41 of the terminal means 40.
This provides for a very quick assembly operationf as well as, providing for any type of soldering operation that is convenient.
The terminal means 40 are mounted directly on the cover means 25, as opposed to being mounted on an insulating member which is then ~, ~ 30~ In turn supported by the end bell or a mounting means that is ; needed to cover the electric coil means OL the transformer.
,: , ~ -5-~ ~2~1 ~- In connection ~lith the leads la and 15, whish are the line voltage leads for the device, they ha~e been disclosed ~s conventional leads w'nich are brought out through the slot means 31, and which are protected between the edge of the slot means 31 at 35, and the electric coil support means 13. With the applica-tion of the cup shaped insulating cover means 2~, the input leads 14 and 15 are quickly encircled by the slot means 31 and held in an appropeiate position between the edge 35 and the support means 13. This once again allows for quick assembly without the need to thread the input leads 14 and 15 through a hole as is done in conventional transformers.
With the cup shaped insulating cover means disclosed, quick assembly is provided. Since the cup shaped insulating cover means 25 is formed of a single insulating member with the terminal means 4~ mounted directly thereto, it is apparent that a minimum of hand labor is required in getting the input leads 1~
and 17 connected to the terminal means 40. The past practice of having to hand assemble a separate insulating board which mounts the terminals, and hand feeding wires through holes where they must then be hand soldered, has been eIiminated. -In Figure 4 a further modifica~ion of the present invention is disclosed. A junction box cover 10' has been , ~ . . .
disclosed which mounts a relay generally disclosed at 50 and a control circuit transformer 51. The control circuit transformer 51 is held to the plate 10' by clamp like ears 52 that attach the , ~ . .
transformer 51 through a hole (no! shown). The device disclosed in Figure 4 is~similar to a unit for control of fan motors and auxiliary circuits in heating and cooling applications. Such a device is marketed by Honeywell Inc. and known as an R8239 Fan Center. In this type of a device it is not only desirable to mount the relay 50 (which is a conventional relay mounted in a molded plug attached to the cover 10'), but to provide the trans-former 51 ~ith a cup shaped cover means 25' that is sirnilar to the cup shaped c~ver means 25 of Figure 1. The difference is that auxiliary terminals means 53 have been mounted on the cover means 25' and are used as tie points for interconnecting various elements to the fan control device. This is shown where the con-ductors 54 and 55 from the relay 50 have been connected to one of the terminals 53 and the terminal means 40. By providing addi-tional terminals 53 on the cup shaped cover means 25' convenient terminal tie points have been provided. With the terminal means 40 and the connection means 41 peojecting out over the edge of the cup shaped cover means 25', additional space is gained around and between the various terminal means 40 and 53 thereby making it a handy and desirable expedient in the manufacture of the fan control device.
In Figure 5 a cut away portlon of the cup shaped cover means 25 is provided showing the support means or electrical coil winding means 13. A cut away portion 60 is provided showing the top of a winding form at 61 and an indentation 62 that is molded directly into the electrical winding form. This recess in the winding form cooperates with a~tongue (not shown) on the inside of the cut away portion of the cup shaped cover rneans 25 so that when the~cup shaped cover means 25 is placed over the sùpport means 13, that the tongue latches into the detent 62 thereby providing a latch means to hold the cup shaped cover means 25 in place on the support means 13.
In Figure 6 a further embodiment of the present inven-tion is disclosed. A cup shaped cover means 25'' has been disclosed having an additional flange 63 that is molded integrally with the balance of the cup shaped cover means 25`'.
: : :
The flange 63 is attached by a rive-t or bolt 54 to the transorm-er 11. In this configuration, a similar cup shaped cover 26 would be provided witll an appropriate flange corresponding to ~ ,~3~ o ~
fla~ge ~ so that th~ two cu~ s'naped insulating co~Jers ~would h~
held onto the transformer by the rivets 6~ and the flanges 63 rather than by any internal latching mechanism that depended on the electric coil means or support means within the transformer structure itself. In this case the slots 30 of Figure 1 would become slots 30' which extend from the terminal ~.eans 40 to the outer edge ~5 of the flange 63. It can be seen that when the cover means 25'' is placed over the transformer 11 that the input ; leads 16 and 17 could be fed from the edge 65 into the'slots 30' 10 , so that the input leads 16 and 17 could be conveniently wrapped around the connection means 41 of the terminal means 40. A simi-lar configuration can be ,used to lead out and termina~e the high voltage leads 14 and 15 if that i5 desirable by replacing cover means 26 with a second cover means 25'l.
A number of variations of the present invention have been disclosed in great detail. The ut'ilization of this inven-, tion leads to a significant cost reduction in the manufacture of ; control circuit transformers which are utilized~in the heating and cooling industry in large quantity., The production quantities of this type of unit runs into millions of units per year. The savings generated by providing a unitary cup shaped insulating cover that not only protects and encloses the trans-former, but also simultaneously mounts the terminals for the transformer so that the terminals can be soldered by any convenient technique, is substantial~ The present invention has been disclosed in various forms and its application could be var-' ied extensively in view of these teachings. The applicant wishes '~ ~ to be limited in the scope of his invention solely by the scope .~ j of the appended claims.
Claims (11)
1. A transformer, including: electrical coil means including at least a pair of magnetically coupled electrical windings with each of said windings having input leads; support means for said coil means; cup shaped insulating cover means attached to said support means to enclose said electrical coil means; said insulating cover means having slot means from an out-er edge of said cup shaped cover means to an intermediate portion of said cover means; electrical terminal means directly mounted on said insulated cover means adjacent said slot means at said intermediate portion of said cover means; and said terminal means including connection means connected to said input leads of one of said electrical windings to complete an electrical circuit from said terminal means to said one of said windings.
2. A transformer as described in claim 1 wherein second cup shaped insulating cover means is attached to said support means to further enclose said electrical coil means; said second cup shaped insulating cover means having a lead out opening therethrough for the passage of said input leads of a second of said electrical windings.
3. A transformer as described in claim 2 wherein said sup-port means for said coil means includes a winding form and lami-nated magnetic circuit means; said laminated magnetic circuit means providing a magnetic circuit for said magnetically coupled electrical windings.
4. A transformer as described in claim 3 wherein said cup shaped insulating cover means abut said laminated magnetic cir-cuit means and cooperate with said winding form to enclose and protect said coil means.
5. A transformer as described in claim 4 wherein said electrical terminal connection means project beyond a side of said cup shaped insulating cover means to facilitate soldering of said terminal means to said winding input leads.
6. A transformer as described in claim 5 wherein said second cup shaped insulating cover means has said lead out opening extending through an edge of said second cover means to allow said lead out opening to be slipped over said input leads of said second of said electrical windings.
7. A transformer as described in claim 5 wherein said cup shaped insulating cover means and said winding form having cooperating latch means to cause said cup shaped insulating cover means to be retained in place on said winding form.
8. A transformer as described in claim 7 wherein said cup shaped insulating cover means having electrical tie terminal means attached thereto and spaced from said electrical terminal means to be used as wiring interconnection means.
9. A transformer as described in claim 5 wherein said cup shaped insulating cover means includes flange means adjacent said laminated magnetic circuit means; fastening means attaching said cup shaped insulating cover means to said laminated magnetic cir-cuit means to enclose said electrical coil means.
10. A transformer as described in claim 9 wherein said cup shaped insulating cover means having electrical tie terminal means attached thereto and spaced from said electrical terminal means to be used as wiring interconnection means.
11. A transformer as described in claim 1 wherein second cup shaped insulating cover means is attached to said support means to enclose said electrical coil means; said second insulating cover means having slot means from an outer edge of said second cup shaped cover means to an intermediate portion of said cover means; further terminal means directly mounted on said second cover means adjacent said slot means at said intermediate portion of said second cover means; and said further terminal means including connection means connected to said input leads of a second of said electrical windings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US14909580A | 1980-05-12 | 1980-05-12 | |
| US149,095 | 1980-05-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1152171A true CA1152171A (en) | 1983-08-16 |
Family
ID=22528782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000375542A Expired CA1152171A (en) | 1980-05-12 | 1981-04-15 | Transformer with integral cover and terminals |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS5797928U (en) |
| CA (1) | CA1152171A (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5039989Y2 (en) * | 1972-05-06 | 1975-11-15 | ||
| JPS5227548A (en) * | 1975-07-21 | 1977-03-01 | Katsumi Shigehara | Connecting device for lead wire with salient piece |
-
1981
- 1981-04-15 CA CA000375542A patent/CA1152171A/en not_active Expired
- 1981-05-12 JP JP6856581U patent/JPS5797928U/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5797928U (en) | 1982-06-16 |
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| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |