US2006317A - Electric switch - Google Patents

Electric switch Download PDF

Info

Publication number
US2006317A
US2006317A US567079A US56707931A US2006317A US 2006317 A US2006317 A US 2006317A US 567079 A US567079 A US 567079A US 56707931 A US56707931 A US 56707931A US 2006317 A US2006317 A US 2006317A
Authority
US
United States
Prior art keywords
spring
switch
contacts
contact
regulator
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
Application number
US567079A
Inventor
Menzel Friedrich
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.)
Robert Bosch AG
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from DE1930B0132530 external-priority patent/DE588892C/en
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US2006317A publication Critical patent/US2006317A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/10—Operating or release mechanisms
    • H01H71/12—Automatic release mechanisms with or without manual release
    • H01H71/14—Electrothermal mechanisms
    • H01H71/16—Electrothermal mechanisms with bimetal element
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/14—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries for charging batteries from dynamo-electric generators driven at varying speed, e.g. on vehicle
    • H02J7/16—Regulation of the charging current or voltage by variation of field
    • H02J7/22—Regulation of the charging current or voltage by variation of field due to variation of make-to-break ratio of intermittently-operating contacts, e.g. using Tirrill regulator
    • H02J7/225—Regulation of the charging current or voltage by variation of field due to variation of make-to-break ratio of intermittently-operating contacts, e.g. using Tirrill regulator characterised by the mechanical construction

Definitions

  • the present invention relates to electric switches of the combined electro-magnetic regulator and cut-out switch type suitable for electrical systems on motor vehicles, such as is disclosed in my Patent No. 1,820,361, dated August 25, 1931, forexample.
  • the object of the present invention is to remove this difficulty by securing the bimetallic spring secured to a spring of the usual material.
  • the advantage is thereby attained that the usual spring can be selected to correspond to the desired contact pressure and the bimetallic spring corresponding to the desired sensitiveness to heat.
  • Figure l is a sectional view of the regulator switch
  • Figure 2 shows the contact spring of the switch on an enlarged scale.
  • the regulator switch is shown in Figure 1 with the switch in the openposition, and apart from the construction of the contact spring is of the usual construction.
  • the switch contact spring consists of two parts. namely, a spring a of the usual material and a bimetallic spring b riveted thereto wheh carries the contact 9 of the switch.
  • the numeral l2 designatesjhe fixed counter contact of the switch.
  • the bimetallic spring 1 curves, under the infiuence of the sparking of the cut-out, towards the fixed contact l2 on a short-circuit taking place, so that the switch is thereby closed. On cooling, the bimetallic spring 1) curves back again into the position shown in the drawing in which the switch is opened.
  • the contact pressure on the switch can be selected for the temperatures occurring in normal working. Further, the sparks 5 arising by the opening and closing of the switch on a short circuit are smaller than in a bimetallic spring which bends upwards on heating from the counter-contact, because the contact spring on becoming heated hasthe tendency to close the switch.
  • the composition of the switch contact spring of two parts a and b enables the spring force and the curvature on heating to be obtained by this means in the desired manner. 5
  • the two may also be connected together by welding or in any suitable other manner.
  • the object 01' the invention is not limited to the constructional form of the regulator switch illustrated.
  • the spring 0. instead of being fastened to the frame of the magnet may also be fastened to the armature.
  • a combined electromagnetic cut-out and regulator for the electrical systems of motor vehicles comprising a core of magnetic material, a voltage coil and a current coil connected to the dynamo and coiled about said core, an armature, means for regulating the output of said dynamo upon movement of said armature, a pair of cutout contacts connected in series with said current coil and the battery, a bimetal spring carrying one of said contacts and a spring of a single ma- 3 terlal upon which said bimetal spring is mounted.
  • a combined electromagnetic cut-out and regulator for the electrical systems of motor vehicles comprising, means for regulating the dynamo oi the system, a pair of cut-out contacts, means for operating said contacts and means for preventing the operation of said contacts upon short circuiting including a bimetal spring carrying one of said contacts adapted to be heated by the sparks caused by the opening of said contacts to cause the spring to distort to prevent the operation of said contacts and a single metal spring mounting for said bimetal spring whereby the desired pressure between the contacts may be maintained for normal working while permitting the choice of ideal dimensions for the bimetal spring.
  • a contact member for an electromagnetic cut-out and regulator switch for the electrical systems of motor vehicles comprising a bimetai spring carrying one of the cut-out contacts and a single spring supporting said bimetal spring, said bimetal spring being operated by the heat generated by sparks caused by the opening or said contacts.
  • a contact member for an electromagnetic cut-out and regulator switch for the electrical systems of motor vehicles comprising a bimetal spring carrying one o! the cut-out contacts and a single spring supporting said bimetal spring, said single spring being secured against movement at one end but being otherwise freely 5 movable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Thermally Actuated Switches (AREA)

Description

June 25, 1935.
F. MENZEL ELECTRIC SWITCH Filed 001 5. 1931 Fig. 4.
Patented June 25, 1935 I UNITED STATES ELECTRIC swr'ron Friedrich Menzel, Stuttgart, Germany, assignor to Robert Bosch Aktiengesellschaft, Stuttgart,
Germany L Application October 5, 1931, Serial No. 567,079 In Germany October 9, 1930 4 Claims.
The present invention relates to electric switches of the combined electro-magnetic regulator and cut-out switch type suitable for electrical systems on motor vehicles, such as is disclosed in my Patent No. 1,820,361, dated August 25, 1931, forexample.
In switches of this type the current coil must be kept small, corresponding to the requirements of the regulator. The automatic cut-out switch under normal conditions of working, with the switch closed, afford a definite contact pressure, so that the switch shall not open prematurely owing to vibrations of the vehicle, and it must curve or bend in the desired manner on becoming heated by the sparking of the circuit-breaker.
These two properties are not always easily combined in a single spring.
The object of the present invention is to remove this difficulty by securing the bimetallic spring secured to a spring of the usual material. The advantage is thereby attained that the usual spring can be selected to correspond to the desired contact pressure and the bimetallic spring corresponding to the desired sensitiveness to heat.
In the drawing an example of construction of the invention is illustrated in which:
Figure l is a sectional view of the regulator switch, and
Figure 2 shows the contact spring of the switch on an enlarged scale.
The regulator switch is shown in Figure 1 with the switch in the openposition, and apart from the construction of the contact spring is of the usual construction. The switch contact spring consists of two parts. namely, a spring a of the usual material and a bimetallic spring b riveted thereto wheh carries the contact 9 of the switch. The numeral l2 designatesjhe fixed counter contact of the switch.
The bimetallic spring 1) curves, under the infiuence of the sparking of the cut-out, towards the fixed contact l2 on a short-circuit taking place, so that the switch is thereby closed. On cooling, the bimetallic spring 1) curves back again into the position shown in the drawing in which the switch is opened.
In this construction the contact pressure on the switch can be selected for the temperatures occurring in normal working. Further, the sparks 5 arising by the opening and closing of the switch on a short circuit are smaller than in a bimetallic spring which bends upwards on heating from the counter-contact, because the contact spring on becoming heated hasthe tendency to close the switch.
The composition of the switch contact spring of two parts a and b enables the spring force and the curvature on heating to be obtained by this means in the desired manner. 5
Instead of riveting the bimetallic spring I) to the spring a, the two may also be connected together by welding or in any suitable other manner.
The object 01' the invention is not limited to the constructional form of the regulator switch illustrated. For example, the spring 0. instead of being fastened to the frame of the magnet may also be fastened to the armature.
I declare that what I claimis: I
.1. A combined electromagnetic cut-out and regulator for the electrical systems of motor vehicles comprising a core of magnetic material, a voltage coil and a current coil connected to the dynamo and coiled about said core, an armature, means for regulating the output of said dynamo upon movement of said armature, a pair of cutout contacts connected in series with said current coil and the battery, a bimetal spring carrying one of said contacts and a spring of a single ma- 3 terlal upon which said bimetal spring is mounted.
2. A combined electromagnetic cut-out and regulator for the electrical systems of motor vehiclescomprising, means for regulating the dynamo oi the system, a pair of cut-out contacts, means for operating said contacts and means for preventing the operation of said contacts upon short circuiting including a bimetal spring carrying one of said contacts adapted to be heated by the sparks caused by the opening of said contacts to cause the spring to distort to prevent the operation of said contacts and a single metal spring mounting for said bimetal spring whereby the desired pressure between the contacts may be maintained for normal working while permitting the choice of ideal dimensions for the bimetal spring.
3. A contact member for an electromagnetic cut-out and regulator switch for the electrical systems of motor vehicles comprising a bimetai spring carrying one of the cut-out contacts and a single spring supporting said bimetal spring, said bimetal spring being operated by the heat generated by sparks caused by the opening or said contacts.
4. A contact member for an electromagnetic cut-out and regulator switch for the electrical systems of motor vehicles comprising a bimetal spring carrying one o! the cut-out contacts and a single spring supporting said bimetal spring, said single spring being secured against movement at one end but being otherwise freely 5 movable.
FRIEDRICH MENZEL.
US567079A 1930-10-09 1931-10-05 Electric switch Expired - Lifetime US2006317A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1930B0132530 DE588892C (en) 1927-12-17 1930-10-09 Unified electromagnetic regulator and switch for electrical systems on vehicles

Publications (1)

Publication Number Publication Date
US2006317A true US2006317A (en) 1935-06-25

Family

ID=6998109

Family Applications (1)

Application Number Title Priority Date Filing Date
US567079A Expired - Lifetime US2006317A (en) 1930-10-09 1931-10-05 Electric switch

Country Status (1)

Country Link
US (1) US2006317A (en)

Similar Documents

Publication Publication Date Title
US2303153A (en) Carrier current controller
US2360684A (en) Circuit breaker
US2989606A (en) Circuit breaker
US1871875A (en) Motor control
US2585068A (en) Electrical circuit breaker
US4177396A (en) Electric motors
US2320117A (en) Electric control means
US2006317A (en) Electric switch
US2439511A (en) Latching or tripping mechanism of circuit breakers
US3038047A (en) Ambient temperature compensated circuit breaker
US2883488A (en) Electromagnetically operable electric switches
US2098926A (en) Electromagnet
GB439242A (en) Improvements in, or relating to, release mechanism for electrical switchgear
US2623138A (en) Thermostatic snap switch
US1398463A (en) Electromagnetic instrument
US1930539A (en) Thermal control device
US1812845A (en) Electroresponsively controlled mechanism
US2482955A (en) Circuit breaker
US3003086A (en) Thermal relay
US2920160A (en) Regulator
US2801312A (en) Electrical apparatus
US1820361A (en) Electric switch
US2234700A (en) Control device
US1664089A (en) Thermostatic control for generators
US1110151A (en) Protective device.