US2787689A - Response indicating electromagnetic device - Google Patents

Response indicating electromagnetic device Download PDF

Info

Publication number
US2787689A
US2787689A US527058A US52705855A US2787689A US 2787689 A US2787689 A US 2787689A US 527058 A US527058 A US 527058A US 52705855 A US52705855 A US 52705855A US 2787689 A US2787689 A US 2787689A
Authority
US
United States
Prior art keywords
plate
indicator
indicator plate
response indicating
contacts
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
US527058A
Other languages
English (en)
Inventor
Stoecklin Josef
Drack Erwin
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.)
BBC Brown Boveri AG Germany
Original Assignee
Bbc Brown Boveri & Cie
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 Bbc Brown Boveri & Cie filed Critical Bbc Brown Boveri & Cie
Application granted granted Critical
Publication of US2787689A publication Critical patent/US2787689A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
    • H04M3/64—Arrangements for signalling the number or class of the calling line to the operator
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/08—Indicators; Distinguishing marks
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/16—Indicators for switching condition, e.g. "on" or "off"

Definitions

  • This invention relates to a response indicating electromagnetic device and more particularly to relays or electromagnetic switches having indicators which show visually the condition of the relay contacts.
  • Objects of the present invention are to provide electromagnetic switches having indicators which are displaced a distance substantially greater than the movement of the armature or other contact-actuating element. More specifically, an object is to provide an electromagnetic switch or relay having an indicator plate which is initially displaced by the relay armature as it moves to actuate the relay contacts, and is then displaced a further, and preferably a greater step, by a spring loaded combination latch and release mechanism which retains the relay position indicator in the signal condition until manually re-set to initial condition.
  • Fig. l is a front elevation of a response indicating electromagnetic switch embodying the invention.
  • Fig. 2 is a side view of the same, with parts in section on the plane of line 2--2 of Fig. 1;
  • Fig. 3 is a side view, like Fig. 2, but showing the switch contacts and indicator in actuated condition;
  • Fig. 4 is a fragmentary transverse section on line 4-4 of Fig. 2, with the latch for the indicator plate in the position occupied when the switch contacts are open.
  • Fig. 5 is a view similar to Fig. 4, on line 55 of Fig. 3, showing the latch and indicator in the positions occupied when the switch contacts are closed.
  • Fig. 6 is a front view of the indicator plate.
  • Fig. 7 is a perspective view of the indicator plate as seen from the rear.
  • Fig. 8 is a sequence of schematic views illustrative of the two-step movement of the indicator.
  • the reference numeral 1 identifies a.
  • front plate of insulating material which supports pairs of spaced stationary contacts 2, 2a and is secured by screws 3 to a block 4 of insulating material and to the forward flange 5 of an inverted U-shaped bracket which carries a solenoid 6.
  • the plate is provided with an upper opening or window 1a for the display of an indicator which will be described later, and with a lower opening lb.
  • Movable contact bridges 8 for spanning the contacts 2 and 2a of each pair have stems 8a which extend through the opening 1b of the front plate and are embedded in block 9 of insulating material which is slidable vertically between the front plate 1 and the bracket 5.
  • the solenoid armature 10 is a soft iron plate having its rear end hinged on the rear flange 5a of the solenoid supporting bracket and its front end seated in a transverse notch 9a of the insulating block 9.
  • ] biases the contacts 8 into their lower position, as shown in Figs. 1 and 2, and they are lifted into actuated position to complete the circuits between contacts 2 and 2a of each pair, as shown Fig. 3, on energization of the solenoid 6.
  • the illustrated switch is of the double-pole single throw type and is normally open but it is to be understood that the invention is not limited to a contact system of this type or to a normally open switch.
  • the front face of the block 4 is grooved vertically to provide a guide channel 40 for a vertically movable indicator plate 11 which drops of its own weight and normally rests on the insulating material block 9 in the initial open position of the switch.
  • the rear of the indicator plate 11 is provided with a recess having a surface with an initial upper portion llu parallel to the direction of vertical sliding movement of the indicator plate and an inclined portion 11b which extends downwardly into proximity with the recess base surface llc which is horizontal, i. e. perpendicular to the direction of sliding movement.
  • the lower half 11d of the front face of the indicator plate is colored such as for example red and the upper half lle is uncolored.
  • a combined latch and re-set plate 12 is slidable horizontally in a slot 4b provided in the block 4 of insulating material. As shown in Figs. 4 and 5, the plate 12 includes a portion 12a which projects beyond the side wall of block 4 and is adapted to be pressed in by the operator to release and drop the target indicator plate. A rear positioned shouldered portion 12b is engaged by one end of a helical spring 13 which biases the reset plate in the direction tending to move the manually actuated reset portion 12a outwardly of the block 4. A front positioned shouldered portion 120, as shown in Fig. 8, is entered into the recess in the indicator plate 11 and bears against the surface portions 11a, 11b.
  • the indicator platc will now remain in the raised position until released by the operator.
  • the indicator plate 11 can be dropped to its initial position by pressing inwardly upon part 12!: of the latch plate thus moving the plate counter to the spring force and shifting the shouldered portion 12c to the right as viewed in Fig. 8. Plate 11 will now drop to its initial position and the shouldered portion 120 will once again bear against the surface portion 11a of the recess in the rear of the indicator plate.
  • a response indicating electromagnetic switch comprising stationary contact means, additional contact means movahle between initial and actuated positions, said additional contact means being engaged with and alternatively spaced from said stationary contact means, actuating means comprising an clectromagnet and armature for moving said additional contact means to its actuated position, an indicator plate means supporting said indicator plate for rectilinear sliding movement between an initial and a signal position corresponding to the respective positions of said additional contact means, said indicator plate including a recess at the rear which includes a surface with an initial portion parallel to the direction of sliding movement of said plate and which merges into a further portion inclined to the direction of sliding movement and terminating short of the end of said plate, a spring-pressed manually-releasable latch plate mounted for movement transverse to the direction of sliding movement of said indicator plate, a spring pressing said latch plate against the surface of the recess in said indicator plate for retaining said indicator plate in its signal position, and actuating means for said indicator plate operable on encrgization of said electromagnet to

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Switch Cases, Indication, And Locking (AREA)
US527058A 1955-02-22 1955-08-08 Response indicating electromagnetic device Expired - Lifetime US2787689A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH2787689X 1955-02-22

Publications (1)

Publication Number Publication Date
US2787689A true US2787689A (en) 1957-04-02

Family

ID=4571789

Family Applications (1)

Application Number Title Priority Date Filing Date
US527058A Expired - Lifetime US2787689A (en) 1955-02-22 1955-08-08 Response indicating electromagnetic device

Country Status (3)

Country Link
US (1) US2787689A (de)
CH (1) CH332289A (de)
DE (1) DE963170C (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3021519A (en) * 1958-12-12 1962-02-13 Westinghouse Air Brake Co Relay energization indicator
US3088007A (en) * 1960-08-31 1963-04-30 Cutler Hammer Inc Electromagnetic relay

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1226689B (de) * 1963-04-26 1966-10-13 Siemens Ag Stellungsanzeiger fuer elektrische Schalter mit einem Elektromagneten
GB1595307A (en) * 1977-02-08 1981-08-12 Lucas Industries Ltd Electrical switch
DE3117914C2 (de) * 1981-05-06 1983-09-01 Siemens AG, 1000 Berlin und 8000 München Elektromagnetisches Schaltgerät
DE3323481A1 (de) * 1983-06-30 1985-01-03 W. Gruner GmbH Relaisfabrik, 7209 Wehingen Relais

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US470697A (en) * 1892-03-15 Protector for electrical apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US470697A (en) * 1892-03-15 Protector for electrical apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3021519A (en) * 1958-12-12 1962-02-13 Westinghouse Air Brake Co Relay energization indicator
US3088007A (en) * 1960-08-31 1963-04-30 Cutler Hammer Inc Electromagnetic relay

Also Published As

Publication number Publication date
DE963170C (de) 1957-05-02
CH332289A (de) 1958-08-31

Similar Documents

Publication Publication Date Title
US2924682A (en) Magnetically actuated switches
US2363854A (en) Push button switch and mounting
US2787689A (en) Response indicating electromagnetic device
US2569281A (en) Contact mechanism for automatic circuit breakers and similar electrical switchgear
US3562682A (en) Vacuum switching apparatus
US4629883A (en) Protective device for movable shelves
US3745492A (en) Electromagnetic contactor with safety latch device
US2854555A (en) Indicating means for multi-pole circuit breakers
US2388934A (en) Circuit breaker control mechanism
US2541577A (en) Safety control mechanism
US1988287A (en) Operating mechanism
US1669106A (en) Electric switch
US1714085A (en) Electromagnetic switch
US2917593A (en) Enclosed circuit breaker
GB959802A (en) Improvements in or relating to a door operator
US2018340A (en) Relay
US2662951A (en) Electric circuit breaker
US2257793A (en) Circuit breaker
US3017475A (en) Relay structure
US2571812A (en) Thermostatic overload relay
US2134179A (en) Electric switch
US2500635A (en) Electromagnetically actuated switch
US1520193A (en) Switching device
US2046472A (en) Electric toaster
US1845514A (en) Electric switch having lockout mechanism