US1952997A - Overload switch - Google Patents

Overload switch Download PDF

Info

Publication number
US1952997A
US1952997A US516190A US51619031A US1952997A US 1952997 A US1952997 A US 1952997A US 516190 A US516190 A US 516190A US 51619031 A US51619031 A US 51619031A US 1952997 A US1952997 A US 1952997A
Authority
US
United States
Prior art keywords
magnets
casing
contact
switch
armature
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
US516190A
Other languages
English (en)
Inventor
Leyhausen Wilhelm
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.)
Individual
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US1952997A publication Critical patent/US1952997A/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
    • H01H71/24—Electromagnetic mechanisms
    • H01H71/38—Electromagnetic mechanisms wherein the magnet coil also acts as arc blow-out device

Definitions

  • This invention relates to an overload switch with a pair of magnets, the poles of which control the release armature, and serve also to establish a magnetic eld for extinguishing the cutout arc.
  • the invention has for its object to pro Jerusalem a more effective magnetic spar. extinguishing than is the case in the known switches of the type mentioned.
  • the magnet coils extend around the longitudinal sides of the magnet arms so that the axes of the coils are parallel to the arms.
  • the axes of the magnet coils are arranged at right angles to the arms of the magnet.
  • a magnetizable body may be substituted which is positioned opposite the iron core of the coil.
  • the invention relates further to the particular construction of the switch.
  • Figures 1 to 4 show an overload switch in the form of a plug switch with two electromagnets, and particularly Figure 1 is a vertical section of this form in the plane of the coil axes;
  • Figure 2 is a cross section thereof
  • Figure 3 is a bottom plan View thereof with the switching mechanism omitted;
  • Figure 4 is a ver-tical section at right angles to that shown in Figure 1;
  • Figures 5 to 7 show a switch in which a magnetizable body is arranged opposite a magnet coil, and particularly Figure 5 is a vertical central section of the second form;
  • Figure 6 is a vertical section at right angles to Figure 5;
  • Figure 7 is a cross section transversely of Fig'- ure 5 on the axes of the magnet core.
  • magnet coils 2 and 3 with their iron cores 4 and 5 are arranged at right angles to the axis of the casing.
  • a spark gap 8 is formed between these coils by the partitions 6 and 7.
  • contacts 9 and 10 are arranged.
  • the iron cores are connected by iron arms 12 and 13 with pole pieces 14 and 15 which act on an armature 16.
  • the armature 16 is pivoted at 39.
  • the contact 10 is carried by the upper end of an arm 40 which is iixed to the arm 4l of a lever pivoted intermediate its ends at 11 and having its remaining arm 42 extending from the pivot in a direction opposite to the arm 41.
  • a spring 45 has one end secured to the arm 41 and its other end se- J'cured to a lug 44 and this spring normally urges the lever arms 41 and 42 to rotate in a clockwise direction.
  • the armature 16 carries a stirrup 46 and limits movement of the lever in this direction.
  • the armature Upon the circuit being overloaded, the armature is liited at its free end and, by means of the stirrup, starts movement of the lever arms in a clockwise direction (see Fig. 4) and this causes the axis of the spring to move downwardly across the pivot axis 11 so that the spring urges the arm 41 downwardly and the lever is snapped into full clockwise position, thus quickly moving Contact 10 to the dotted line position.
  • a stem 48 projects from the end closure ofthe device and carries a spring-pressed push button 4'7 which, when the switch is open and the button is pressed upward, will engage the arm 41 and cause it to move in an anti-clockwise direction until the contact 10 closes on the Contact 9.
  • Figures 2 and 3 show the advantageous utilization of space of the switch.
  • the coils and iron parts are adapted to the curvature of the switch casing.
  • the spark gap is larger than in other switches.
  • the coils and iron cores are substantially rectangular and their longitudinal sides lie in the longitudinal direction of the switch.
  • a plurality of contacts may also be provided and the switching mechanism constructed in any desired manner.
  • the end faces of the iron cores may be enlarged in known manner by flanges.
  • the construction illustrated with the cores 4 and 5 situated close together and with the coils surrounding the iron parts 12, 13, 14, 15 and 16 presents the further advantage that the device acts as a choking coil in the case of strong short circuits and limits the intensity of the short circuit current.
  • the lower part 22 of the switch casing 21, 22 is covered by an insulating plate 38 and subdivided into three compartments of different size by two Vertical insulating walls 24 and 25 which engage in the outer wall.
  • two Vertical insulating walls 24 and 25 In the middle, narrow compartment, limited by the walls 24 and 25, contacts 26 and 27 are arranged, the Contact 26 being stationary and the contact 27 movable.
  • a magnet coil 28 with its iron core 29 is arranged transversely to the fcc axis of the switch and on the outer side an armature 30 is positioned opposite the iron core.
  • the other lateral compartment contains a magnetizable body 31 which is connected to a plate 23 also composed of magnetizable material.
  • the release device is arranged above the plate 23. It consists substantially of a cylinder 32, mounted in two bearings. A spring (not shown) tends to rotate this cylinder in a certain direction. In one end of the cylinder 32 a blade spring 33 is clamped and carries the movable contact 27. The other end of the cylinder is provided on its end face with a tooth 34 which, in the normal position of the switch is overlapped by a hook 35 mounted on the upper end of the two armed armature 30 mounted in the plate 23. A spring 36, pressing against the hook arm, tends to hold the armature in this position. When the cylinder 32 is in the position illustrated, which is caused by the hook 35 holding it against the action of the spring (not shown) the contacts 27 and 26 are in closed position. A hand lever 37 is mounted on the middle portion of the cylinder 32,
  • the releasing device and the contacts may be of any desired construction.
  • the breaking may be effected at several points, and the movement of the contacts may be carried out parallel to the axis of the switch instead of transversely thereto.
  • an overload device carried by the casing and arranged to effect movement of the movable contact away from the fixed contact.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Breakers (AREA)
  • Electromagnets (AREA)
US516190A 1930-02-28 1931-02-16 Overload switch Expired - Lifetime US1952997A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE590030T 1930-02-28

Publications (1)

Publication Number Publication Date
US1952997A true US1952997A (en) 1934-03-27

Family

ID=7769511

Family Applications (1)

Application Number Title Priority Date Filing Date
US516190A Expired - Lifetime US1952997A (en) 1930-02-28 1931-02-16 Overload switch

Country Status (5)

Country Link
US (1) US1952997A (en(2012))
BE (1) BE377360A (en(2012))
DE (1) DE590030C (en(2012))
FR (1) FR711057A (en(2012))
NL (1) NL31988C (en(2012))

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3270170A (en) * 1960-12-07 1966-08-30 Licentia Gmbh Compact switch having a simple breaking contact and associated arc extinction means

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE754137C (de) * 1938-08-06 1954-04-22 Aeg Magnetische Lichtbogenloescheinrichtung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3270170A (en) * 1960-12-07 1966-08-30 Licentia Gmbh Compact switch having a simple breaking contact and associated arc extinction means

Also Published As

Publication number Publication date
NL31988C (en(2012)) 1933-09-15
DE590030C (de) 1933-12-21
FR711057A (fr) 1931-09-02
BE377360A (en(2012)) 1931-03-31

Similar Documents

Publication Publication Date Title
US2895028A (en) Pushbutton-operated overload switch
US2797277A (en) Circuit breaker
JP7169373B2 (ja) 電流経路の直流電流を遮断するための断路装置及び回路遮断器
US2443090A (en) Circuit breaker
US2298313A (en) Controllable flush electric outlet
US3064104A (en) Electrical interlock
US2585824A (en) Electric switch
US1952997A (en) Overload switch
US3689855A (en) Circuit protector
US3308404A (en) Electric switch responsive to predetermined or abnormal current condition
US2484863A (en) Overload protective device
US2334562A (en) Electric contact element
US3284743A (en) Magnetic switching device
GB247593A (en) Improvements relating to electric switches
US1763116A (en) Magnetic contactor
GB426999A (en) Improvements in electromagnetically-tripped automatic overload circuit-breakers
US2449109A (en) Quick action switch
US1960402A (en) Switch and circuit breaker
US3081387A (en) Circuit breaker
US3299377A (en) Synchronous operating mechanisms for controlling circuit breakers
US3130282A (en) Solenoid operated switches
US2250016A (en) Magnetic blowout
US2849580A (en) Snap switch for direct current
GB289474A (en) Improvements in or relating to circuit interrupters
US3944954A (en) Excess current switching device