US3842188A - Device for holding and contacting thermally loaded ceramic resistors in a case - Google Patents
Device for holding and contacting thermally loaded ceramic resistors in a case Download PDFInfo
- Publication number
- US3842188A US3842188A US00415119A US41511973A US3842188A US 3842188 A US3842188 A US 3842188A US 00415119 A US00415119 A US 00415119A US 41511973 A US41511973 A US 41511973A US 3842188 A US3842188 A US 3842188A
- Authority
- US
- United States
- Prior art keywords
- resistor
- case
- holding
- thermally loaded
- rib
- 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
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/02—Housing; Enclosing; Embedding; Filling the housing or enclosure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01C—RESISTORS
- H01C1/00—Details
- H01C1/01—Mounting; Supporting
- H01C1/014—Mounting; Supporting the resistor being suspended between and being supported by two supporting sections
Definitions
- the invention relates to a device for holding and contacting thermally loaded ceramic resistors.
- Thermally loaded ceramic resistors such as PTC resistors are generally brittle and, while they have the characteristic of a substantial temperature expansion coefficient, they are relatively weak structurally.
- the device hereof which accommodates a PTC resistor includes resiliently biased electrical contacts which old the resistor firmly in a fixed position while permitting the resistor to expand freely upon being heated without incurring stresses wihch would cause breakage.
- the object of the present invention is that of further simplifying the construction of such device.
- This object is achieved by making the disc in two parts which are formed by ribs integrally injection moulded with the two parts of the case.
- the rib which surrounds the resistor body is provided with parallel extensions and is connected through transverse webs only at the ends of these extensions and at the middle of the rib. In this way very large ventilation openings are created between the side walls of the casing, which openings are covered only by the width of the rib.
- the rib on the other part of the case is associated with a peripheral portion of the resistor body that occupies considerably less than 180 of the circumference of said body. In the extreme case it suffices if said rib is associated with a point on this peripheral portion.
- FIG. 1 is a longitudinal section through a resistor holding device in accordance with the invention
- FIG. 2 is a cross section on line 2-2 of FIG. 1;
- FIG. 3 is a vertical elevation view of the right side of the view shown in FIG. 1;
- FIG. 4 is a vertical elevational view with parts broken away of the left side of the view shown in FIG. 1;
- FIG. 5 is a top view partially in section of the view shown in FIG. 1.
- the device has a case consisting of two parts 1 and 2 which are brought into register with each other by means of an edge 3 and are interconnected by a rivet 4.
- a PTC resistor body 5 in the form of a cylindrical disc is held loosely by its median part in a hole 6 which is formed in a disc constituted by two ribs 7 and 8.
- the rib 7 is integrally injection moulded with part I of the case, and the rib 8 with part 2 of the case.
- Double contacts 9 and 10 engage the two end faces of the resistor body 5. These contacts are parts of contact plate sections 11 which bear against the side walls 12 and 13 of part 1 of the case and project outwardly to form terminal connections 14.
- the hole 6 formed by the ribs 7 and 8, receiving the disc is not round. Instead, only a l-portion of the rib 7 is associated with the periphery of the resistor body 5, and the rib 8 is associated with a bearing point. However this suffices to hold the resistor body 5 in position between the resilient contacts 9 and 10.
- the rib 7 has two extensions 15 and 16. It is connected to the side walls 12 and 13 by transverse webs l7, l8 and 19 only at the ends of these extensions and at the middle of the rib. Consequently, large ventilation openings 20 and 21, through which air for cooling the resistor body 5 may pass, are left at both sides of the rib 7 and of its extensions 15 and 16.
- the resistor body 5 together with the contact plates 11 are pushed into part 1 of the case.
- the rib 7 holds the resistor body in its final position.
- Application of the rib 8 when part 2 of the case is fitted ensures that this position is also maintained during operation.
- the material of the entire case may be any one of a large number of electrically insulating heat resisting plastic substances.
- a device for holding and contacting a thermally loaded disc shaped ceramic resistor comprising a casing having first and second parts, means fastening said parts together, said first casing part having a U-shaped rib straddled by U-shaped end walls, web means connecting said end walls and said U-shaped rib, said second casing part having a rectangularly shaped rib aligned with said U-shaped rib to form a resistor cavity therebetween, and a pair of resilient electrical contacts disposed on opposite sides of said cavity for resiliently engaging the opposite sides of a resistor when disposed in said cavity and for resiliently engaging said end walls.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Details Of Resistors (AREA)
- Resistance Heating (AREA)
Abstract
The invention relates to a device for holding and contacting thermally loaded ceramic resistors. Thermally loaded ceramic resistors such as PTC resistors are generally brittle and, while they have the characteristic of a substantial temperature expansion coefficient, they are relatively weak structurally. The device hereof which accommodates a PTC resistor includes resiliently biased electrical contacts which old the resistor firmly in a fixed position while permitting the resistor to expand freely upon being heated without incurring stresses wihch would cause breakage.
Description
United States Patent [191 on 3,842,188
Petersen Oct. 15, 1974 541 DEVICE FOR HOLDING AND CONTACTING 3,130,032 7/1373 Petersen at al. 333/333 x THERMALLY LOADED CERAMIC RESISTORS IN A CASE Poul Petersen, Nordborg, Denmark Assignee: Danfoss A/S, Nordborg, Denmark Filed: Nov. 12, 1973 Appl. No.: 415,119
Inventor:
Foreign Application Priority Data Nov. 14, I972 Germany 2255664 US. Cl. 174/52 R, 338/57, 338/220, 338/232, 338/316 Int. Cl H016 1/02, HOlc 1/08 Field of Search 174/16 R, 52 R; 338/22 R, 338/53, 57, 220, 226, 232, 315, 316
References Cited UNITED STATES PATENTS 7/1973 Halstead l74/52 R Primary Examiner -Laramie E. Askin [57] ABSTRACT The invention relates to a device for holding and contacting thermally loaded ceramic resistors. Thermally loaded ceramic resistors such as PTC resistors are generally brittle and, while they have the characteristic of a substantial temperature expansion coefficient, they are relatively weak structurally. The device hereof which accommodates a PTC resistor includes resiliently biased electrical contacts which old the resistor firmly in a fixed position while permitting the resistor to expand freely upon being heated without incurring stresses wihch would cause breakage.
1 Claim, 5 Drawing Figures PATENIEUUCT 1 51914 SHEET 20F 2 3 SHQ Q DEVICE FOR HOLDING AND CONTACTING THERMALLY LOADED CERAMIC RESISTORS IN A CASE Devices are known for holding and contacting thermally loaded ceramic resistors in a case, in particular PTC resistors, in which device the resistor body is held in position by electrical contacts which bear in a mechanically positive manner agains the planar end faces of the body. It is also known to loosely guide the resistor body at its median portion in a hole which corresponds to the cross section of the body and is formed in a disc made of electrically insulating heat resisting material and held in the case. In this arrangement, the case may consist of two interconnected parts. This enables the ceramic resistor to be held and contacted very firmly without the danger of the resistor being irreparably damaged. Furthermore, the surface of the resistor body can be reached by the surrounding air over a large area, so that uniform heating and cooling of the surface results.
The object of the present invention is that of further simplifying the construction of such device.
This object is achieved by making the disc in two parts which are formed by ribs integrally injection moulded with the two parts of the case.
In this construction it is not necessary to produce the disc as a separate component. Holding means for securing the disc in the case are also unnecessary. A very simple construction therefore results.
Particular advantage is achieved if that part of the case that carries the'electrical contacts applied in a mechanically positive manner has a rib which surrounds the resistor body over approximately 180. The resistor body can therefore be mounted practically entirely in one of the parts of the case. The rib provided on the second part of the case is then only required to ensure that the resistor body cannot at a later stage move out of the assembly position so achieved.
In a preferred embodiment the rib which surrounds the resistor body is provided with parallel extensions and is connected through transverse webs only at the ends of these extensions and at the middle of the rib. In this way very large ventilation openings are created between the side walls of the casing, which openings are covered only by the width of the rib.
It suffices if the rib on the other part of the case is associated with a peripheral portion of the resistor body that occupies considerably less than 180 of the circumference of said body. In the extreme case it suffices if said rib is associated with a point on this peripheral portion.
The invention will now be described in greater detail by reference to a form of construction illustrated in the drawing, in which:
FIG. 1 is a longitudinal section through a resistor holding device in accordance with the invention,
FIG. 2 is a cross section on line 2-2 of FIG. 1;
FIG. 3 is a vertical elevation view of the right side of the view shown in FIG. 1;
FIG. 4 is a vertical elevational view with parts broken away of the left side of the view shown in FIG. 1; and
FIG. 5 is a top view partially in section of the view shown in FIG. 1.
The device has a case consisting of two parts 1 and 2 which are brought into register with each other by means of an edge 3 and are interconnected by a rivet 4. A PTC resistor body 5 in the form of a cylindrical disc is held loosely by its median part in a hole 6 which is formed in a disc constituted by two ribs 7 and 8. The rib 7 is integrally injection moulded with part I of the case, and the rib 8 with part 2 of the case. Double contacts 9 and 10 engage the two end faces of the resistor body 5. These contacts are parts of contact plate sections 11 which bear against the side walls 12 and 13 of part 1 of the case and project outwardly to form terminal connections 14.
In the present embodiment, the hole 6 formed by the ribs 7 and 8, receiving the disc, is not round. Instead, only a l-portion of the rib 7 is associated with the periphery of the resistor body 5, and the rib 8 is associated with a bearing point. However this suffices to hold the resistor body 5 in position between the resilient contacts 9 and 10.
The rib 7 has two extensions 15 and 16. It is connected to the side walls 12 and 13 by transverse webs l7, l8 and 19 only at the ends of these extensions and at the middle of the rib. Consequently, large ventilation openings 20 and 21, through which air for cooling the resistor body 5 may pass, are left at both sides of the rib 7 and of its extensions 15 and 16.
When assembling the device, the resistor body 5 together with the contact plates 11 are pushed into part 1 of the case. As this happens, the rib 7 holds the resistor body in its final position. Application of the rib 8 when part 2 of the case is fitted ensures that this position is also maintained during operation.
The material of the entire case may be any one of a large number of electrically insulating heat resisting plastic substances.
I claim:
1. A device for holding and contacting a thermally loaded disc shaped ceramic resistor comprising a casing having first and second parts, means fastening said parts together, said first casing part having a U-shaped rib straddled by U-shaped end walls, web means connecting said end walls and said U-shaped rib, said second casing part having a rectangularly shaped rib aligned with said U-shaped rib to form a resistor cavity therebetween, and a pair of resilient electrical contacts disposed on opposite sides of said cavity for resiliently engaging the opposite sides of a resistor when disposed in said cavity and for resiliently engaging said end walls. a: =k
Claims (1)
1. A device for holding and contacting a thermally loaded disc shaped ceramic resistor comprising a casing having first and second parts, means fastening said parts together, said first casing part having a U-shaped rib straddled by U-shaped end walls, web means connecting said end walls and said U-shaped rib, said second casing part having a rectangularly shaped rib aligned with said U-shaped rib to form a resistor cavity therebetween, and a pair of resilient electrical contacts disposed on opposite sides of said cavity for resiliently engaging the opposite sides of a resistor when disposed in said cavity and for resiliently engaging said end walls.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2255664A DE2255664C2 (en) | 1972-11-14 | 1972-11-14 | Device for holding and contacting thermally loaded ceramic resistors in a housing |
Publications (1)
Publication Number | Publication Date |
---|---|
US3842188A true US3842188A (en) | 1974-10-15 |
Family
ID=5861644
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00415119A Expired - Lifetime US3842188A (en) | 1972-11-14 | 1973-11-12 | Device for holding and contacting thermally loaded ceramic resistors in a case |
Country Status (13)
Country | Link |
---|---|
US (1) | US3842188A (en) |
JP (2) | JPS4978944A (en) |
AR (1) | AR205334A1 (en) |
BR (1) | BR7308850D0 (en) |
CA (1) | CA997441A (en) |
DD (1) | DD107166A6 (en) |
DE (1) | DE2255664C2 (en) |
DK (1) | DK150553C (en) |
ES (1) | ES420478A1 (en) |
FR (1) | FR2206565B2 (en) |
GB (1) | GB1417264A (en) |
IT (1) | IT1046433B (en) |
SE (1) | SE381363B (en) |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3921117A (en) * | 1974-11-29 | 1975-11-18 | Texas Instruments Inc | Solid state electrical switch |
US3924222A (en) * | 1974-10-09 | 1975-12-02 | Thermo Electronics Inc | Resistance devices for use in energizing the starting winding of a split phase induction motor |
US3925748A (en) * | 1973-11-08 | 1975-12-09 | Thermo Electronics Inc | Resistance device for use in energizing the starting winding of a split phase induction motor |
US3955170A (en) * | 1974-11-29 | 1976-05-04 | Texas Instruments Incorporated | Solid state switch |
US3988709A (en) * | 1975-05-12 | 1976-10-26 | Eugene T. McKinnon | Electric motor controlling relay |
DE2849584A1 (en) * | 1977-11-15 | 1979-05-17 | Texas Instruments Inc | THERMAL RELAY AND METHOD OF ASSEMBLING SUCH RELAY |
US4241370A (en) * | 1978-11-14 | 1980-12-23 | Texas Instruments Incorporated | Thermal relays particularly for starting single-phase asynchronous motors |
US4267635A (en) * | 1976-05-03 | 1981-05-19 | Texas Instruments Incorporated | Method of making a solid state electrical switch |
US4299026A (en) * | 1978-11-14 | 1981-11-10 | Texas Instruments Incorporated | Method of assembling a motor starting relay |
EP0062167A2 (en) * | 1981-03-31 | 1982-10-13 | Siemens Aktiengesellschaft | Electrical component centered and adjusted in a casing |
US4431983A (en) * | 1980-08-29 | 1984-02-14 | Sprague Electric Company | PTCR Package |
US4504817A (en) * | 1981-04-13 | 1985-03-12 | Murata Manufacturing Co., Ltd. | Demagnetizing circuit using a PTC thermistor device |
FR2551910A1 (en) * | 1983-09-09 | 1985-03-15 | Tdk Corp | RESISTANT DEVICE WITH POSITIVE TEMPERATURE COEFFICIENT |
EP0307165A2 (en) * | 1987-09-07 | 1989-03-15 | Murata Manufacturing Co., Ltd. | Positive temperature coefficient thermistor device |
US5153555A (en) * | 1989-11-28 | 1992-10-06 | Murata Manufacturing Co., Ltd. | Electronic device comprising a plate-shaped electronic element and a support and overcurrent protector for the same |
US5281758A (en) * | 1992-11-12 | 1994-01-25 | Gte Products Corporation | Electrical contact with shock absorbing means |
US5729416A (en) * | 1995-05-30 | 1998-03-17 | General Electric Company | Motor starter and protector module |
EP1739702A1 (en) * | 2005-06-29 | 2007-01-03 | Sanyo Electric Co., Ltd. | Starter relay |
US20080124062A1 (en) * | 2006-11-12 | 2008-05-29 | Kai Wallhaeusser | Heating device for diesel fuel and heatable diesel filter system |
US20090162041A1 (en) * | 2007-12-21 | 2009-06-25 | Beetz Klaus Dr | Heating device for fuel |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3743761A (en) * | 1971-08-10 | 1973-07-03 | Gen Electric | High voltage rectifier holder |
US3750082A (en) * | 1972-06-15 | 1973-07-31 | Danfoss As | Plug assembly with resistor |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1029096B (en) * | 1954-07-20 | 1958-04-30 | Westinghouse Brake & Signal | Sealed dry rectifier arrangement and method for its manufacture |
US2880295A (en) * | 1957-05-10 | 1959-03-31 | Gen Telephone Lab Inc | Silicon carbide resistor mounting |
US3568013A (en) * | 1968-12-30 | 1971-03-02 | Texas Instruments Inc | Solid-state switch |
-
1972
- 1972-11-14 DE DE2255664A patent/DE2255664C2/en not_active Expired
-
1973
- 1973-01-01 AR AR250884A patent/AR205334A1/en active
- 1973-10-26 SE SE7314591A patent/SE381363B/en unknown
- 1973-11-06 JP JP48124902A patent/JPS4978944A/ja active Pending
- 1973-11-09 IT IT70290/73A patent/IT1046433B/en active
- 1973-11-09 DD DD174559*A patent/DD107166A6/xx unknown
- 1973-11-12 BR BR8850/73A patent/BR7308850D0/en unknown
- 1973-11-12 US US00415119A patent/US3842188A/en not_active Expired - Lifetime
- 1973-11-13 CA CA185,565A patent/CA997441A/en not_active Expired
- 1973-11-13 ES ES420478A patent/ES420478A1/en not_active Expired
- 1973-11-13 DK DK610973A patent/DK150553C/en not_active IP Right Cessation
- 1973-11-14 GB GB5288873A patent/GB1417264A/en not_active Expired
- 1973-11-14 FR FR7340482A patent/FR2206565B2/fr not_active Expired
-
1977
- 1977-10-03 JP JP1977133092U patent/JPS5417134Y2/ja not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3743761A (en) * | 1971-08-10 | 1973-07-03 | Gen Electric | High voltage rectifier holder |
US3750082A (en) * | 1972-06-15 | 1973-07-31 | Danfoss As | Plug assembly with resistor |
Cited By (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3925748A (en) * | 1973-11-08 | 1975-12-09 | Thermo Electronics Inc | Resistance device for use in energizing the starting winding of a split phase induction motor |
US3924222A (en) * | 1974-10-09 | 1975-12-02 | Thermo Electronics Inc | Resistance devices for use in energizing the starting winding of a split phase induction motor |
US3955170A (en) * | 1974-11-29 | 1976-05-04 | Texas Instruments Incorporated | Solid state switch |
US3921117A (en) * | 1974-11-29 | 1975-11-18 | Texas Instruments Inc | Solid state electrical switch |
US3988709A (en) * | 1975-05-12 | 1976-10-26 | Eugene T. McKinnon | Electric motor controlling relay |
US4267635A (en) * | 1976-05-03 | 1981-05-19 | Texas Instruments Incorporated | Method of making a solid state electrical switch |
DE2849584A1 (en) * | 1977-11-15 | 1979-05-17 | Texas Instruments Inc | THERMAL RELAY AND METHOD OF ASSEMBLING SUCH RELAY |
US4241370A (en) * | 1978-11-14 | 1980-12-23 | Texas Instruments Incorporated | Thermal relays particularly for starting single-phase asynchronous motors |
US4299026A (en) * | 1978-11-14 | 1981-11-10 | Texas Instruments Incorporated | Method of assembling a motor starting relay |
US4431983A (en) * | 1980-08-29 | 1984-02-14 | Sprague Electric Company | PTCR Package |
EP0062167A2 (en) * | 1981-03-31 | 1982-10-13 | Siemens Aktiengesellschaft | Electrical component centered and adjusted in a casing |
EP0062167A3 (en) * | 1981-03-31 | 1984-03-28 | Siemens Aktiengesellschaft | Electrical component centered and adjusted in a casing |
US4504817A (en) * | 1981-04-13 | 1985-03-12 | Murata Manufacturing Co., Ltd. | Demagnetizing circuit using a PTC thermistor device |
FR2551910A1 (en) * | 1983-09-09 | 1985-03-15 | Tdk Corp | RESISTANT DEVICE WITH POSITIVE TEMPERATURE COEFFICIENT |
EP0307165A2 (en) * | 1987-09-07 | 1989-03-15 | Murata Manufacturing Co., Ltd. | Positive temperature coefficient thermistor device |
EP0307165A3 (en) * | 1987-09-07 | 1990-01-17 | Murata Manufacturing Co., Ltd. | Positive temperature coefficient thermistor device |
US5153555A (en) * | 1989-11-28 | 1992-10-06 | Murata Manufacturing Co., Ltd. | Electronic device comprising a plate-shaped electronic element and a support and overcurrent protector for the same |
US5281758A (en) * | 1992-11-12 | 1994-01-25 | Gte Products Corporation | Electrical contact with shock absorbing means |
US5729416A (en) * | 1995-05-30 | 1998-03-17 | General Electric Company | Motor starter and protector module |
US7522030B2 (en) | 2005-06-29 | 2009-04-21 | Sanyo Electric Co., Ltd. | Starter relay |
EP1739702A1 (en) * | 2005-06-29 | 2007-01-03 | Sanyo Electric Co., Ltd. | Starter relay |
US20070001801A1 (en) * | 2005-06-29 | 2007-01-04 | Masahide Kobayasi | Starter relay |
CN100517944C (en) * | 2005-06-29 | 2009-07-22 | 三洋电机株式会社 | Starter relay |
US20080124062A1 (en) * | 2006-11-12 | 2008-05-29 | Kai Wallhaeusser | Heating device for diesel fuel and heatable diesel filter system |
DE102006055216A1 (en) * | 2006-11-21 | 2008-05-29 | Eichenauer Heizelemente Gmbh & Co. Kg | Heating device for use in diesel filter system of diesel engine, has contact plates pressed by initial load in housing, so that front surfaces of plates are pressed against heating element by spring loads exercised by side pieces of plates |
US7860381B2 (en) | 2006-11-21 | 2010-12-28 | Eichenauer Heizelemente Gmbh & Co. Kg | Heating device for diesel fuel and heatable diesel filter system |
US20090162041A1 (en) * | 2007-12-21 | 2009-06-25 | Beetz Klaus Dr | Heating device for fuel |
US8301021B2 (en) * | 2007-12-21 | 2012-10-30 | Mahle International Gmbh | Heating device for fuel |
Also Published As
Publication number | Publication date |
---|---|
JPS5397747U (en) | 1978-08-08 |
FR2206565A2 (en) | 1974-06-07 |
CA997441A (en) | 1976-09-21 |
IT1046433B (en) | 1980-06-30 |
JPS5417134Y2 (en) | 1979-07-03 |
DE2255664B1 (en) | 1974-04-25 |
FR2206565B2 (en) | 1978-07-07 |
GB1417264A (en) | 1975-12-10 |
JPS4978944A (en) | 1974-07-30 |
DK150553C (en) | 1988-03-28 |
DE2255664C2 (en) | 1974-11-28 |
BR7308850D0 (en) | 1974-08-22 |
DD107166A6 (en) | 1974-07-05 |
ES420478A1 (en) | 1976-04-01 |
DK150553B (en) | 1987-03-23 |
SE381363B (en) | 1975-12-01 |
AR205334A1 (en) | 1976-04-30 |
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