DE1690301A1 - Thermostatic mini switch - Google Patents

Description

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Sep.Ho. 613.705

Texas Instruments Incorporated, Dallas, Soxaa, U.S.A, Shexmoet & tisoher Kleineohaltar

The invention relates to a small thermostat A switch with a housing, both housing parts open tightly and firmly connected and its eretee Sehäuseteil a Sohaltglled that is prone to warmth, Torzugviei ·· a son appendix, with a movable contact and whose second housing part has a stationary contact

When working τοη motors and generators, transformers for other "lecture-free devices, it is desirable that the Wioklunsen or other part against excessive currents

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and to protect against excessive heating. To this Purpose Bind usually in the current path soleher derate for protection against upper currents occurring in these devices Circuit breakers, but these devices do not protect against excessive heating during constant work, with high currents or other causes. To now the security of such devices in the right In order to achieve this, it is necessary that the protection should be given is built into the device, all the more a precise upper * to ensure monitoring. With the downsizing of motors, transformers and generators and the like, let it be It is necessary that ation the protective devices are at least reduced in size so that they are now used in the devices * ea can ·.

The invention is therefore the task of destruction the · create one on heat "nepreohenden Kleineohalter bu, which can be IIert easily into the windings of electrical equipment InBtP" ¹ of Ib its production uitf la its mode of action is cheap reliable and from a This object is achieved by the invention in the case of the holder mentioned at the beginning in that the two parts of the skin are replaced by one

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adhesive sealing, ax electrically insulating material beete Henden Ieolierring at the edges to each other firmly and tightly connected and DASA the stationary contact or the Schaltgliod mindestene by an inwardly projecting projection in the housing iota formed directly in or carried ·

According to a further feature of the invention, the switch can be easily and simply calibrated from within.

Another characteristic of the invention is the part © the thermoetatisohen small switch in such a way that it calibrates suitable for mass production

Taking into account the possible modifications, the Invention can be summarized as described below *

/ Me invention looks at a thermostat pool ! Small switches, especially one such »that works with a snap action and one that is electrically conductive Hapf uses the electrically insulated τοπ one electrically conductive cover and is sealed against it with the aid of an electrically insulating adhesive sealing ring. A thermostatic elecent and a moving contact are

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either mounted on the Sap * or the lid, wä a stationary contact on the other of the two ropes © is appropriate. an attachment can also be provided, to limit the movement of the thermostatic element, and possibly the houses of one housing partly bent in such a way that ei® denotes the Deekel featklesaaenÄ hold to close the lid with the fapf facilitate «, a Tielssahl τοη welding projections can to be attached to the lid, so as to create an "unteroüiedlioh" Orientation of the Deekele and the associated from * echltaeestUoke relative to the housing to allow «furthermore an electrically insulating sleeve can be provided to electrically isolate the switch from its surroundings,

Another feature of the invention is the small * Containers to protect against the entry of air, dust and humidity sealed in order to eo the switch against a disadvantageous To protect Beelnflueeung

Exemplary embodiments according to the invention are explained in more detail with the aid of the drawings

Show it"

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fflg.l © Ine eo diagrammatic view of an initial out «· form of management a small scale according to d «r Invention,

Fig. 2 is a disassembled Aneloht for illustration the different ropes of the Kleineehaltera naoh

Fig.l,
Pig «3 a cross section along line 3-3 of Fig.l» wherein

the contacts are in your position, 4 shows a cross-section near line 4-4 of Flg.l, wherein the contact closing position in pulled out

Lines and uie. Contact open division in atriohpunfc-

oriented lines is illustrated _f? 1β · 5 is a plan view of a second AusfUhrungaform the small Schaltere gemäee the invention, wherein

• ine Iaolierhülae partly broken off let « 71g.6 a cross-section near line 6 * 6 of the lig. 5, »Ig · 7 a cross section along line 7-7 of the» iß.6, Pig.8 a complete view of the lid Wg. 5-7.

In 71g.1 and 2, the Sohalter ala geese * is denoted by and has a cover 10, an insulating ring U _1, a snap member 13 which responds to heat and a flapf 12. As can be seen particularly clearly in FIG

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represents Deokal 10 made of metal, Yorzugaweiee In a rectangular öeetalt, ausgeutanzt and has a tab 15 with a Looh 16, in order to attach a connection line au the to-use device, further the dachshund has an average Elnpresaung 10a *

On the underside of the Deokala 10, in the area of the central recess 10a, there is one end of the bent, all bimetallic strips formed sehnappgliecea 13 attached to "Bohnelsatg daa has a contact 14 on the other end The interior of the Deokela is welded on in the example shown, but is held on a spacer 20 (Yig 3 and 4) to you oh a welding knob / 21, which is held in place through the strip. Although 1st in dleaem epesleMtn Ausfiihrungafeetspial "used in AhatandsatUok ZQ _t but could be a ElndrUokuag on Deokel 10 12 ähnlioh the Sindrüokusg 19 of lapiea in glelohe" manner ala AbaU.ndaetüofc dienan to ao la · de · free end Kontal: tea 13 of to separate the internal deodorant * "

The metallic Kapf 12 has a * n Hanaoh 2a "represents OM check atlnen circumferential heruu extends and with eiaea Plansch Π3

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of the cover «10 fits together. An Anechlue β βteile on the lapf is formed by a tab 17; which has a Looh 18. On the floor of the lapfee, the indentation 19 is provided at a predetermined point, in alignment with the contact 14 attached to the free end of the son apparticle 13, which carries the contact 19a which cooperates with the contact 14 in the sole position of the son appendix member 13.

The Deokel 10 and the Bapf 12 are duroh on the? Lansohen the Xaolierring 11 connected to each other, which electrically isolates the deodorant from the Hapf. The insulation length can be made of Mylar, for example, and both sides with a warm «* be coated with hardening adhesive. When the parts are assembled and properly connected, a Druok exerted on the Deokel 10 and dl · assembly on heated to a temperature sufficient to produce the thermosetting Harden the adhesive, wich ·! dl · warmth J «dooh nloht so may be high that the calibration <Jea bimetal strip 13 is adversely affected. This makes the deodorant firmly and tightly connected to the lapf. This · gate driving «For sealing the part · not only results in a« good · electrical isolation and a diohttn composite, special » is also a simple means of getting the part without wasting

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τοπ screws and bid to fasten together.

In flg. 3 and 4 the position of the Sshnappgliedea 13 is relative for Auadrttokung 19 and the contact 19a shown after the Deokel 10 connected to the Sapf 12 iat. The on Free end of the son app member 13 attached contact 14 eratreofct aich in this position down to the ground dea Napfea 12 and interacts with contact 19a, who serves as the second contact of the failure «As in from» drawn lines, the holder is now in his SU position, ao daea aioh an immediate one Elektriaoher Weg rom Lappen 15 Via the AbatandaatUok 20, da · snap member 13, the contact 14 »the contact 19a to the Lobe 17 results.

The sonic link 13 is also made of two or more metals ■ it different coefficients of thermal expansion? » composed, ao daaa a temperature change a unequal expansion and contraction opposite to each other Front surfaces of the strip results. The strip let to shaped to have a curved part, eg by forming a ·· apherical gate ·. to d «r Face. Duroh an aolohe form and construction

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results in eich, daea when the temperature is increased by the unequal expansion of the metals of the bimetal strips The curved surface is flattened for a long time, until a significant reversal at a certain temperature the bend of the Blmetallatisifena in the opposite direction occurs »whereby this inverted form of curvature is maintained for a long time until the temperature drops significantly * sinks, whereupon the snap member 13 suddenly returns to its original shape. In these two Movements let the reversal of the curvature aueserordentlioh suddenly and results from the expansion or contraction of the metals from which the thermoetatiache member becomes eaame set let «

In order to calibrate the switch zvl and ensure that it works within the desired working range, the pressure relief 19 is primed above, that a pressure is exerted on the bottom of the Hapfee until the contact 19a touches the contact 14. Subsequently, an additional pressure is generated in order to exert an upward force on the child member 13.

In the embodiment described above, the contact remains

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14 in contact with the contact 13a when the temperature

increases until there is an inversion of the curve shape at dsm Son app member 13 enters · At this point in time it separates contact 14 from contact 19a, and the circuit dea devices to be protected is opened.

With many bimetallic parts, for example the Son appendix 13, a condition that is referred to as creeping can result. When the temperature rises This thermostatic element begins to bend slowly and then moves upwards for so long only a little, until the curvature is reversed. ”If an additional pressure is borne by the indentation 19 is not exerted on the contact 14 via the contact 19a (and thus also on the snap member 13), the Contact 14 has the tendency to crawl away from contact 19a, so that now the contact is interrupted before dl critical temperature is reached. However, if an up * Pressure is exerted on the snap member 13 over the pressure required to touch the contact 14 with the contact 19a the contact between the contacts 19a -ind 14 is maintained until the reversal of the Bulge occurs. In this way the interruption * » temperature of the son appendix 13 according to the altitude » be placed in which the indentation 19 is upwards

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cum reaching a touch dee contacts 19a with the Contact 14 extends

Since both the bowl 12 and the lid 10 are electric sofa aktiT Bind, they must be isolated from all metallic surfaces. This can be done because the Holder in an insulating tube that is tucked under the arms arranged or provided with some other encapsulation, for which various known types of epoxy resin « Are available·

As a result of the adhesive bond between the cover and the lapf can be used in any media, such as for example Hotorwioklungslaok or pitch, immersed as it is used, for example, as ballast in fluorescent light, without daduroh the interior the so holder becomes dirty.

In Tig.4 is dl · open position of the holder by strioh-dotted Lines shown it shows that th «r Bimetallic strips 13 can hit the inside of the deodorant · IO. This can be used to advantage be to limit the path of the snap link au, wouroh • a service life is increased.

* i «.5-e aei _{e # n} another example · a«

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Switch 30 of the invention in which aas snap member 40 is attached to the bottom 34 of a sapf 32. The protective cover thus serves as a protective cover for the snap link, which prevents damage from negligent transport of the device or negligent handling of the device during assembly. A projection 38 is provided in the bottom 34, including an elevation eu BChcffen, on which the cantilevered snap member 40 can be fastened in a known manner with the aid of a sole button 42. A contact 44 of conventional contact material at the free end of the 1st Schnappgliedea 40 attached "On Bodea 34 let an indentation 36 mounted, the stop and ale aur preventing an excessively large travel of the snap-action" is gliedee during the opening of the contacts with a snap action. The indentation 36 is arranged so that the circular arc sucked through the center of gravity of the contact 44 goes through the stop when the snap member 40 snaps into place.

Perntr are tarpaulin heights 48, 48 and 49, 49 on opposite sides Side walls 46 of the Ifapfes 32 gate seen. The planned heels 49 have been extended. On the basis of this Maasnahae will received below.

awieehen .den paddling 48, 49 and a Usaksl 50 is a «B Dichtendtr isolating ring 51 from an elelctrisoh-

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the material with the same adhesive properties as the Ieolierring 11 arranged after the Pig. 1-4 · The

* I

2) eok »l 50 let made of an electrically conductive material formed and carries a stationary contact 54. The movable, arranged on the son app member 40 contact 44 can move aioh eo because he has the stationary contact 54 touched, baw. separated from this "

The flaneehen 49 are bent over to form the clamping Peethaiten dee Beokele 50. As can be clearly seen in FIG. 7, the die ring 51 extends inwards beyond the bent flanges 49, so that the electrical insulation of the cover 50 from the cup 32 is now maintained. "This" construction is particularly suitable for mass production in comparison to the example according to J? ig, l ~ 4- in that a separate work ·· gate direction is not required to hold the deodorant and the cup together, while the · wava-hardening · adhesive · material heats and is hardened in order to divide the parts together, that is to say that the traverse can be guided on a running belt, while the rope, "I duroh a heating zone" because of the

49
"Le Klemawirfcung dtr fUnechan ** unused throws" Sin guttr Terbund "as the deofcel and the vaccination is necessary," ■ to any Sindringen from Laok or other media

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prevent the calibration and the failure of the work being adversely affected. The embodiment described above results in a particularly effective bond, since the required pressure can be maintained for a longer period of time even when using the mass production method ? »· In the example according to Fig. 1 * 4, a separate holding device is required,

Fig. 8 shows a feature that provides additional flexibility for the holder 30. Two groups of jumps 52a and 52b are provided here to secure the stationary contacts 54. In this way, the protrusion 52b · "both results in the a Ansohluasorientieruzif (a.insbes.Plg.l) using the projections 52a or other offset by 180 ° connection orientation duroh using the lid 50 as the AUOH ffapf 32 are lugs 56 for Ansohllsasen of Supply lines Ii and L2 provided.

The switch 13 can be telescoped into an insulating oven insulating Hüloe 60 can be used, put it on the buttocks to isolate the environment

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Claims (1)

A 35 892 h - 15 - 8/16/1967 Claims 1. Thermostatieoher Kleinsohalter with a housing whose both housing parts are tightly and feet connected to one another and its first housing part is a tub responsive Switching element, preferably a snap element, with a movable one Contact carries and the second housing part has a stationary contact «characterized in that the two housing parts. (10, 12; 32, 34) with an adhesive seal electrically insulating material existing insulating ring (11; 51) firmly and tightly connected to one another on the bands and that the stationary contact (19, 19a) or the contact element (40) from one to the inside into the housing (10, 12; 32, 34) protruding projection (19 * 38) is formed or carried at least indirectly (Hg. 1-4; Pig. 5-8). ! 2. Small switch naoh claim 1, characterized in that the Housing parts are made of a deformable metal. 3 · Kleineohalter according to claim 1 or 2, characterized in, dad dae switching element on the inwardly protruding projection (58) is attached (»Fig. 5-8). 4 · ELciaaohalter naoh one of the preceding claims, characterized gekennseiohnet that the contact (19, 19a) is attached to the near inside protruding projection (19) (Jig. 4). 5. Xleinso holder according to one of the preceding claims, characterized in that on the first housing part (32) an ins Another protrusion (56) protruding from the inside of the housing? 109839/0378 ". S £ - BADORiQlNAL A 35 892 h - 16 - 8/16/1967 net, the ale stop for the Sehalt member (40) dieat (Pig. 5-8). 6. Klelnechalter according to one of the preceding claims. tia ~ characterized by the fact that the TorsprÜBge (19 ₉ 38, 36) are formed by an indentation (Fig. 1-8). 7. Small switch according to one of the preceding AnspJü hey, characterized in that the Sohaltglied (13) is cantilevered at its free end and en & beweglichön contact (14) trSgt (Pig. 1-4). 8. Small switch according to one of the preceding claims, characterized in that on both housing parts (10 * 12) One Aneatsetüok each (15 »17), in front of & ugswelee in one piece with this is attached to the fastening of the fittings is (Pig. 1 - 4). 9. Klelnsohalter according to one of the preceding claims, characterized characterized in that on one of the housing parts (50) two Groups (52a, 52b) of welding preprints to be welded on a! rope, in particular a contact (54), are attached (Pig. 5-8). 10. Kl switch he according to one of the preceding claims _p, characterized in that at least the rapf-like housing part (32), optionally the two housing parts "(10, 12), each have a splash (48, 49; 22, 23) through the adhesive bracing ring (51; 11) are tightly connected to one another (Pig. $ -8, Pig. 1-4). BATH ORIGINAL 109839/0378 - 17 - A 35 892 h - 17 - 8/16/1967 11. XLeinsohalter according to one of the preceding claims, characterized characterized in that the one housing part sapfarfcig (12) and the other is designed like a cover (10). 12. Kleinsehalter according to claim 11, characterized in that the base (10) pressing in a medium (1oa) has _p whose border preferably to a flange (25) 0? Ig. 1 - 4). 13. Kleinochalter according to claim 11 or 12, characterized in that that the switching element (13) is attached to the inside of the cover (10). 14- · ELeinsohalter according to one of claims 11-13, characterized in that there is a Spacer (20) is attached to which the holding member (13) is fixed (Fig. 4) 15 · Low levels? naoh one of claims 11-14, characterized in that that the switching element (40) is attached to the bottom (34) of the cup-like housing part (32) (Pig. 5-8). 16. Heineeh & lter NaOH any of claims 10 - _r 15 »characterized in that the flange (49) of the cup-like ßehäueeteils (32) bent at at least two opposite sides about the Seokelrand or the Deckelflansoh sum jest kl em en dee lid (50) and the insulating ring (51) between this flange (49) and the Deokel (50) is arranged accordingly (Fig. 5-8). - 18 - 109839/0378 Δ 35 892 h - 18 - 8/16/1967 17 «Kleineohalter according to one of the previous e & Aias sayings, thereby characterized in that an insulating sleeve (60) «ar recording of the whole switch (30) Torgceehen iet (Fig. 5 - 8). 109839/0378 J). Blank page