DE427902C - Overcurrent heat switch - Google Patents
Overcurrent heat switchInfo
- Publication number
- DE427902C DE427902C DEN24277D DEN0024277D DE427902C DE 427902 C DE427902 C DE 427902C DE N24277 D DEN24277 D DE N24277D DE N0024277 D DEN0024277 D DE N0024277D DE 427902 C DE427902 C DE 427902C
- Authority
- DE
- Germany
- Prior art keywords
- heat switch
- contact
- switch
- overcurrent heat
- overcurrent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
- H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
- H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
- H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
- H01H37/761—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit
- H01H2037/762—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit using a spring for opening the circuit when the fusible element melts
- H01H2037/763—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material with a fusible element forming part of the switched circuit using a spring for opening the circuit when the fusible element melts the spring being a blade spring
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H37/00—Thermally-actuated switches
- H01H37/02—Details
- H01H37/32—Thermally-sensitive members
- H01H37/52—Thermally-sensitive members actuated due to deflection of bimetallic element
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Thermally Actuated Switches (AREA)
Description
Es sind bereits Überstrom-Wärmeschalter mit einem durch Stromwärme zwischen einem beweglichen, federnden Schallikontakt und einem festen Kontakt schmelzenden Lot bekannt geworden. Bei diesen Schaltern büßt die Spannkraft des beweglichen Schaltkontaktes durch längere Benutzung bei normaler Gebrauchstemperatur ein, wodurch das Ansprechen des Wärmeschalters zweifelhaft wird.There are already overcurrent heat switches with a through current heat between one movable, resilient sonic contact and a fixed contact melting solder known become. With these switches, the tension force of the moving switch contact is lost due to prolonged use at normal use temperature, reducing the response the heat switch becomes doubtful.
ίο Aufgabe der Erfindung soll es nun sein, diese Mangel zu beseitigen. Dies wird dadurch erreicht, «daß für den beweglichen Schaltkontakt des Wärmeschalters, der insbesondere für Heizkissen gedacht ist, die an, sich für die Betätigung von Schaltikontakten allgemein bekannte Zweimetallfeder verwendet wird. Mit zunehmender Erwärmung biegt sich bekanntlich die Zweimetallfeder infolge der verschiedenen Ausdehnungskoeffizienten ihrer beiden Metallstreifen durch. An dieser Durchbiegung wird auiclv die Zweimetallfeder niemals etwas verlieren. Neu ist die Verwendung einer solchen als beweglicher Schaltkontakt 'dienenden Zweimetallfeder in der Verbindung mit einer durch Stromwärme schmelzenden, Lötstelle. Durch die Herstellung als Zweimetallstreifen wird hier also die AbreüMcraft der Feder gegenüber dem haftenden Lote erhöht und gesichert.ίο The task of the invention should now be this To eliminate deficiency. This is achieved by «that for the movable switch contact of the heat switch, which is particularly intended for heating pads that are intended to be used for the Actuation of switch contacts generally known two-metal spring is used. With As is known, the two-metal spring bends as a result of the different Expansion coefficient of their two metal strips. At this deflection the bimetal spring will never be anything lose. What is new is the use of a 'moving switch contact' Two-metal spring in connection with a soldering point that melts due to the heat of current. Through the production as a two-metal strip, the AbreüMcraft of the spring becomes here increased and secured compared to the adhesive solder.
Auf der Zeichnung ist die Erfindung in einer Draufsicht und in einer Seitenansicht dargestellt. Es ist c ein U-förmiges Isoliersfüc/k, im dem die Anschlüsse d und e für die Zu- und Ableitung befestigt sind. Der Anschluß d bildet den festen Kontakt, mit dem die bei e angeschlossene Zweimetallfeder b durch ein Lotmetall <a verbunden ist. Die Zweimetallfeder b ist so ausgebildet, daß sie auch im kalten Zustande den festen Kontakt nicht berührt. Tritt eine unzulässige Erwärmung des zu schützenden Apparates (z. B. Heizkissens) auf, so schmilzt die Lötstelle a. Unter der Wirkung· seiner Eigenspannung und der durch seine Erwärmung erzeugten zusätzlichen Spannung schnellt der Zweimetallstreifen b vom festen Kontakt zurück und unterbricht den Stromkreis.In the drawing, the invention is shown in a top view and in a side view. It is c a U-shaped Isoliersfüc / k, in which the connections d and e for the inlet and outlet are attached. The connection d forms the fixed contact to which the two- metal spring b connected at e is connected by a solder metal <a . The two-metal spring b is designed so that it does not touch the fixed contact even when cold. If inadmissible heating of the device to be protected (e.g. heating pad) occurs, the solder joint melts a. Under the effect of its internal stress and the additional voltage generated by its heating, the bimetal strip b snaps back from the fixed contact and interrupts the circuit.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEN24277D DE427902C (en) | Overcurrent heat switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEN24277D DE427902C (en) | Overcurrent heat switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE427902C true DE427902C (en) | 1926-04-17 |
Family
ID=7342941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEN24277D Expired DE427902C (en) | Overcurrent heat switch |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE427902C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002021555A1 (en) * | 2000-09-07 | 2002-03-14 | Robert Bosch Gmbh | Overload protection unit |
-
0
- DE DEN24277D patent/DE427902C/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002021555A1 (en) * | 2000-09-07 | 2002-03-14 | Robert Bosch Gmbh | Overload protection unit |
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