US3614702A - Terminal-contact rivet construction and method of assembly thereof - Google Patents

Terminal-contact rivet construction and method of assembly thereof Download PDF

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Publication number
US3614702A
US3614702A US855809A US3614702DA US3614702A US 3614702 A US3614702 A US 3614702A US 855809 A US855809 A US 855809A US 3614702D A US3614702D A US 3614702DA US 3614702 A US3614702 A US 3614702A
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United States
Prior art keywords
sleeve
rivet
body portion
opening
terminal strip
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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US855809A
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English (en)
Inventor
Walter S Vargas
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Elmwood Sensors Inc
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Elmwood Sensors Inc
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Filing date
Publication date
Application filed by Elmwood Sensors Inc filed Critical Elmwood Sensors Inc
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Publication of US3614702A publication Critical patent/US3614702A/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/04—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of riveting
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/16—Fastening of connecting parts to base or case; Insulating connecting parts from base or case
    • H01R9/20—Fastening by means of rivet or eyelet

Definitions

  • the present invention has application in thermostatic switch constructions that are employed in small appliances such as coflee percolatorsand the like.
  • the thermostat switch as used in a small electrical appliance is normally constructed with interior contact elements that are electrically interconnected to terminal strips that are secured to the switch housing exteriorly thereof.
  • a bimetallic element is usually employed in such a switch and is heat responsive to make or break contact between the contact elements within the switch housing.
  • the terminal strips Prior to the instant invention, the terminal strips were interconnected to the contact elements by means of a rivet that projected through an opening formed in the housing of the switch.
  • the terminal strips and interior contact elements had a tendency to become loosened on the rivet because of the temperature differentials experienced in the operation of the switch as contained in the electrical appliance. When such a situation occurred, proper electrical contact between the interior contact element and the external terminal strip was difiicult to obtain, thereby resulting in malfunction of the thermostat.
  • the present invention relates to a thermostatic switch construction that includes a housing formed of a nonconducting material and which has an interior chamber formed therein. At least one opening is formed in the housing that communicates with the interior chamber and a terminal strip is located at the outer end of the opening exteriorly of the housing and a contact element is located at the inner end of the opening in said chamber. Fixed within the opening in the housing is a metallic sleeve, the metallic sleeve cooperating with a metallic rivet projecting therethrough to anchor the terminal strip exteriorly of the housing and to fix the contact element within the chamber.
  • the terminal strip and the contact element are permanently and securely fixed in position by deforming the outer ends thereof and providing a flange on the inner end of the sleeve that cooperates with the head of the rivet, wherein the terminal strip and contact element are secured between the sleeve and rivet.
  • the contact strip and element are sandwiched between the sleeve and rivet, they cannot bedislodged therefrom and even if the housing of the thermostatic switch is subjected to temperature changes which results in loosening of the terminal-contact assembly in the housing, the terminal switch and contact element are still maintained in firm position between the rivet sleeve.
  • thermostatic switch construction that includes a tenninal strip and contact element that are securely held in position in the housing of the switch.
  • Still another object is to teach a method of securing a terminal strip and contact element in place in a thermostatic switch construction, the steps of the method including the deforming of the outer endsof the sleeve and rivet to lock a terminal strip therebetween.
  • FIG. 1 is a partial sectional view of a body portion of a thermostatic switch construction showing a terminal strip and contact element prior to the assembly thereof to the switch houss;
  • FIG. 2 is a partial sectional view similar to FIG. 1- showing the assembly operation of a terminal strip and contact element; and 7 FIG. 3 is an amplified sectional view of FIG. 1, illustrating the finished assembly of the terminal strip and contact element to the housing of the switch construction.
  • thermostatic switch construction 10 embodied in the present invention is illustrated and is generally indicated at 10.
  • the thermostatic switch construction 10 of the present invention has application in small electrical appliances such as a coffee percolator or the like.
  • the concept of the invention that embodies the securement of a terminal strip and contact element in place between a sleeve and rivet as will be described hereinafter, is not limited to thermostatic switches, although the purpose of the invention does contemplate the use of a terminal contact rivet assembly in an environment that is subject to temperature differentials.
  • the thermostatic switch construction embodied in the present invention includes a housing generally indicated at 11 that is defined by a body portion I2 and a base 13 that is secured to the body portion by an annular clamping member 14, as will be described hereinafter.
  • the body portion 12 of the housing 1 l is formed of a heat resistant phenolic resin and has a generally circular cross-sectional configuration, an interior chamber 15 being formed therein. Extending through the body portion 12 and communicating with the interior chamber 15 is a passage or opening 16, while a passage or opening 17, having a smaller axial dimension, is also formed in the body portion 12 in spaced relation with respect to the opening 16.
  • terminal strips 18 and 20 are fixed to the body portion 12 exteriorly thereof, and are adapted to be electrically interconnected to interior contact elements 22 and 24.
  • the contact element 24 is formed with an integral spaced parallel portion 25, a contact button 27 being joined to the portion 25 and normally making contact with the contact element 22.
  • a temperature responsive bimetallic element 29, located in a recess 33 of the base 13, is adapted to urge a plunger 31 into engagement with the parallel portion 25 of the contact element 24 for moving the contact button 27 out of engagement with the contact element 22, thereby breaking the electrical circuit as established between the terminal strips 18 and 20 through their respective contact elements 22 and 24.
  • metallic sleeves 26 and 28 are located in the openings 16 and 17 and cooperate with rivets 30 and 32 for securing the terminal strips and contact elements to the housing 11.
  • the assembly of the terminal strips 18 and 20 and the contact elements 22 and 24 to the housing 11 is initiated by inserting the terminal strips 18 and 20 over the ends of pins 34, only one of which is illustrated in FIGS. 1 and 2.
  • the body portion 12 is placed over the pins which are received in openings 16 and 17, the terminals strips 18 and 20 being oriented in channels 44 and 46 that are formed in an end wall of the body portion.
  • the metallic sleeves 26 and 28 are inserted over the pins 34 in the openings 16 and 17 respectively and, as illustrated in FIG. 1, the outermost end of each sleeve engages the corresponding terminal strip.
  • the contact elements 22 and 24 are then placed over the ends of the pins 34 within the chamber 15.
  • the diameter of the pins 34 is somewhat less than the openings 16 and 17 through which they extend, and thus the sleeves 26and 28 are receivable on the pins 34 as located within the openings 16 and 17.
  • the sleeves 26 and 28 are each formed with an interior flange 38 and 40 respectively, the flanges cooperating with heads 42 and 43 respectively of the rivets 30 and 32 to secure the contact elements 22 and 24 in place within the switch housing, as will be described.
  • the outer end of the body portion is provided with the channels 44 and 46 in which the terminal strips 18 and are received, the channels 44 and 46 being adapted to prevent lateral shifting of the terminal strips 18 and 20 after they have been locked in place on the body portion 10 by the rivets 30 and 32.
  • the openings 16 and 17 are countersunk as indicated at 48 and 50 at the outer ends thereof, the countersunk portions 48 and 50 communicating with the channels 44 and 46 respectively.
  • the rivets 30 and 32 are inserted within the sleeves 26 and 28 respectively in the direction of the arrows as seen at the bottom of the rivets in FIG. 1.
  • the pins 34 As the rivets are fed into the sleeves 26 and 28 they displace the pins 34, which are shown in FIG. 1 in the full-line position as being removed entirely from the body portion 12 when the rivets are fully inserted into their respective sleeves.
  • the pins 30 and 32 displace the pins 34, the pins reach a stop position and, as continued pressure is exerted on the rivets (see FIG. 2), the outermost ends of the sleeves 26 and 28 are deformed by flaring outwardly as indicated at 52 and 54 in FIG. 3.
  • each of the rivets 30 and 32 is formed with a shell configuration having a relatively thin wall as indicated at 56 and 58in FIG. I, and when the pressure is applied to the thin walls of the shells against the pins 34, the walls are deformed so as to be bent over the terminal strips 18 and 20 through which the rivets 30 and 32 extend.
  • annular bent over wall portions 56 and 58 cooperate with the deformed portions 52 and 54 of the sleeves 26 and 28 to lock the terminal strips 18 and 20 therebetween.
  • the heads of the rivets 42 and 43 capture the contact elements 22 and 24 therebetween and the flanges 38 and 40 of the sleeves 26 and 28 respectively.
  • the assembly of the thermostatic switch is completed by locating the base 13 in engagement with the body portion 12, a shoulder 61 of the base being located against the adjacent edge of the body portion 12.
  • the base 13 is formed with an interiorly projecting portion 62 that is received within the chamber 12 of the body portion, an opening 64 being formed in the projecting portion 62.
  • the recess 33 that is formed in the base 13 receives the pin 31 therein which also projects through the opening 64 for engagement with the contact element 24.
  • the bimetallic element 29 is received in an annular groove 72 formed in the base 13 and is locked in place by the annular locking member 14 that is secured to the body portion 12 and the base 13. It is seen that in the operation of the device, the bimetallic element 29 is responsive to changes in the temperature, and is flexed upwardly to the dotted line position as illustrated in FIG. 2 to move the pin 31 upwardly,
  • thermostatic switch construction 10 as embodied in the present invention is subjected to temperature differentials during the operation thereof. Should the body portion 12 expand or contract during this operation, the effect thereof will not in any way influence the securement of the terminal strips 18 and 20 to the sleeves 26 and 28 and rivets 30 and 32. Thus proper electrical communication between the terminal strips 18 and 20 will be maintained with their respective contact elements 22 and 24 at all times. Should the sleeves 26 and 28 become loose within the openings 14 and 16 upon expansion of the body portion 12, the contact elements 22 and 24 and the tenninal strips 18 and 20 will still remain effectively locked between their respective sleeves and rivets.
  • a thermostatic switch construction comprising a housing having a body portion formed of a nonconducting material and in which an interior chamber is formed, at least on opening formed in said body portion that communicates with said interior chamber, a terminal strip located at the outer end of said opening exteriorly of said body portion and a contact element located at the inner end of said opening in said chamber, a metallic sleeve fixed in said opening, and a rivet projecting through said contact element, said sleeve and said terminal strip, and having an inner end located in said chamber and an outer end located at the outer end of said opening, the outer end of said rivet being free from engagement with any externally applied fastener, said sleeve and rivet being deformable at their outer ends for engaging relation with said terminal strips on opposite sides thereof and cooperating together at their outer ends to anchor said terminal strip therebetween exteriorly of said body portion, said sleeve having an outwardly extending flange at its inner end cooperating with the inner end of said rivet to fix said contact element therebetween within said chamber, wherein said
  • said sleeve having a flange formed on the inner end thereof and said rivet including a head, said contact element being captured between the head of said rivet and the flange of said sleeve.
  • a housing having a body portion formed of a nonconducting material and in which an interior chamber is formed, at least one opening formed in said body portion that communicates with said interior chamber, a terminal strip located at the outer end of said opening exteriorly of said body portion and a contact element located at the inner end of said opening in said chamber, a metallic sleeve fixed in said opening, and a river projecting through said sleeve and cooperating therewith to anchor said terminal strip exteriorly of said body portion and to fix said contact element within said chamber, wherein said terminal strip and contact element are permanently and securely fixed in position regardless of the expansion or contraction of said body portion due to temperature difierentials in the operation of said switch construction, the outer end of said sleeve being flared outwardly and the outer end of said rivet being turned over, wherein said terminal strip is anchored between the flared outer end of said sleeve and the turned-over end of said rivet, the body portion being countersunk at the outer end of said opening, the flare
  • a method of securing a terminal strip in a thermostatic switch construction wherein the terminal strip is interlocked between a sleeve and a n'vet that extend through an opening formed in the body portion of said switch construction, comprising the steps of locating a pin in said opening, mounting said terminal strip on said pin exteriorly of said body portion, inserting said sleeve around said pin in said opening, and feeding said rivet through said sleeve simultaneously displacing the pin from said opening and deforming the outer ends of said rivet and sleeve to anchor said terminal strip therebetween.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermally Actuated Switches (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
US855809A 1969-09-08 1969-09-08 Terminal-contact rivet construction and method of assembly thereof Expired - Lifetime US3614702A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US85580969A 1969-09-08 1969-09-08

Publications (1)

Publication Number Publication Date
US3614702A true US3614702A (en) 1971-10-19

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ID=25322116

Family Applications (1)

Application Number Title Priority Date Filing Date
US855809A Expired - Lifetime US3614702A (en) 1969-09-08 1969-09-08 Terminal-contact rivet construction and method of assembly thereof

Country Status (9)

Country Link
US (1) US3614702A (xx)
JP (1) JPS5023902B1 (xx)
CH (1) CH533901A (xx)
DE (1) DE2044320C3 (xx)
DK (1) DK132778C (xx)
FR (1) FR2061048A5 (xx)
GB (1) GB1284342A (xx)
NL (1) NL156534B (xx)
SE (1) SE369563B (xx)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731014A (en) * 1971-08-02 1973-05-01 Universal Technology Keyboard switch and unitized multiple switch configuration
US4482792A (en) * 1981-12-07 1984-11-13 Tri-Tech, Inc. Sealed toggle switch
US4563551A (en) * 1985-01-09 1986-01-07 Indak Manufacturing Corp. Electrical switch having assured low-resistance electrical contact between terminal rivets and contact plates
WO1999051886A1 (de) * 1998-04-06 1999-10-14 Profil Verbindungstechnik Gmbh & Co. Kg Verbindungseinrichtung zum verbinden zweier bauteile, kombination der verbindungseinrichtung mit den beiden bauteilen und verfahren zur herstellung einer verbindung zwischen zwei bauteilen
US20120325633A1 (en) * 2011-06-24 2012-12-27 Lsis Co., Ltd. Circuit breaker
US20130321120A1 (en) * 2012-05-31 2013-12-05 Art-Sea Industrial Company Limited Thermostat
US20160111813A1 (en) * 2014-10-20 2016-04-21 Qicheng Electrical Equipment Co., Ltd. Photo-control receptacle

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2530971C2 (de) * 1975-07-11 1985-01-03 Inter Control Hermann Köhler Elektrik GmbH & Co KG, 8500 Nürnberg Temperaturregler
DE8303325U1 (de) * 1983-02-08 1983-08-11 Zell, Manfred, 7530 Pforzheim Bimetallschalter
CN102683107A (zh) * 2012-05-08 2012-09-19 上海航天科工电器研究院有限公司 一种温控器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2233124A (en) * 1940-02-05 1941-02-25 William C Furnas Electric contact
CH356188A (de) * 1956-05-14 1961-08-15 Ckd Modrany Narodni Podnik Bimetallischer thermischer Auslöser
US3236977A (en) * 1962-06-07 1966-02-22 Pace Inc Double pole thermostat switch
US3317693A (en) * 1964-10-21 1967-05-02 Therm O Disc Inc Snap acting thermal disc with bent-over angulated leaf spring contact member

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US26406A (en) * 1859-12-13 barteam
DE729567C (de) * 1936-08-04 1942-12-18 Siemens Ag UEberstromschalter
DE717219C (de) * 1937-08-27 1942-02-09 Siemens Ag Installationsselbstschalter
DE734320C (de) * 1940-06-23 1943-04-13 Stotz Kontakt Gmbh Schaltglied fuer Installations-Schalter
DE902991C (de) * 1943-06-19 1954-02-01 Siemens Ag Klemmenbolzendurchfuehrung fuer Isolierwaende
US2740864A (en) * 1953-01-05 1956-04-03 Gen Mills Inc Precision thermostatic switch
DE1155525B (de) * 1961-06-26 1963-10-10 Licentia Gmbh Elektrischer Selbstschalter, z.B. Motorschutzschalter mit thermischen UEberstrom- und elektromagnetischen Schnellausloesern
DE1465190A1 (de) * 1965-07-13 1969-01-16 Tropa Anstalt Kleinthermostat
GB1133030A (en) * 1966-07-20 1968-11-06 Texas Instruments Inc Electrical heater assembly
DE1962979U (de) * 1966-11-15 1967-06-29 Constructa Werke G M B H Elektrische kontaktanordnung.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2233124A (en) * 1940-02-05 1941-02-25 William C Furnas Electric contact
CH356188A (de) * 1956-05-14 1961-08-15 Ckd Modrany Narodni Podnik Bimetallischer thermischer Auslöser
US3236977A (en) * 1962-06-07 1966-02-22 Pace Inc Double pole thermostat switch
US3317693A (en) * 1964-10-21 1967-05-02 Therm O Disc Inc Snap acting thermal disc with bent-over angulated leaf spring contact member

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3731014A (en) * 1971-08-02 1973-05-01 Universal Technology Keyboard switch and unitized multiple switch configuration
US4482792A (en) * 1981-12-07 1984-11-13 Tri-Tech, Inc. Sealed toggle switch
US4563551A (en) * 1985-01-09 1986-01-07 Indak Manufacturing Corp. Electrical switch having assured low-resistance electrical contact between terminal rivets and contact plates
WO1999051886A1 (de) * 1998-04-06 1999-10-14 Profil Verbindungstechnik Gmbh & Co. Kg Verbindungseinrichtung zum verbinden zweier bauteile, kombination der verbindungseinrichtung mit den beiden bauteilen und verfahren zur herstellung einer verbindung zwischen zwei bauteilen
US20100303579A1 (en) * 1998-04-06 2010-12-02 Profil Verbindungstechnik Gmbh & Co., Kg Fastener device for fastening two components
US20120325633A1 (en) * 2011-06-24 2012-12-27 Lsis Co., Ltd. Circuit breaker
US20130321120A1 (en) * 2012-05-31 2013-12-05 Art-Sea Industrial Company Limited Thermostat
US20160111813A1 (en) * 2014-10-20 2016-04-21 Qicheng Electrical Equipment Co., Ltd. Photo-control receptacle
US9691582B2 (en) * 2014-10-20 2017-06-27 Qicheng Electrical Equipment Co., Ltd. Photo-control receptacle

Also Published As

Publication number Publication date
NL7013173A (xx) 1971-03-10
DK132778C (da) 1976-09-06
DE2044320B2 (de) 1972-12-14
JPS5023902B1 (xx) 1975-08-12
NL156534B (nl) 1978-04-17
DE2044320A1 (de) 1971-04-29
FR2061048A5 (xx) 1971-06-18
SE369563B (xx) 1974-09-02
DK132778B (da) 1976-02-02
GB1284342A (en) 1972-08-09
CH533901A (fr) 1973-02-15
DE2044320C3 (de) 1981-10-08

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