US3740573A - Circuit arrangement with door lock switch - Google Patents

Circuit arrangement with door lock switch Download PDF

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Publication number
US3740573A
US3740573A US3740573DA US3740573A US 3740573 A US3740573 A US 3740573A US 3740573D A US3740573D A US 3740573DA US 3740573 A US3740573 A US 3740573A
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United States
Prior art keywords
door
switch
door lock
circuit arrangement
closed
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Expired - Lifetime
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English (en)
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C Kellermeyer
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Individual
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Individual
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    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00—Accessories in connection with locks
    • E05B17/22—Means for operating or controlling lock or fastening device accessories, i.e. other than the fastening members, e.g. switches, indicators

Definitions

  • the invention relates to a circuit arrangement for switching on and off current utilizing devices or loads by means of an impulse relay disposed in the lead to the load.
  • Such circuit arrangements are known; they are known also for residential installations, and they are advantageous in that the line carrying the operating voltage need extend only from the junction box to the load, of course, via the impulse relay, whereas only a relatively inexpensive line for low voltage is needed to that point at which the switch is to be located. Furthermore, it is advantageous that it is possible to switch the same load on and offfrom any desired number of locations.
  • door contact switches comprising, in general, a push button switch mounted in the door frame and being pressed down sufficiently, when the door is closed, to keep the switch open and moving forward, upon opening of the door, so far as to cause I the switch to be closed and current to be supplied to the load.
  • Such switches are used above all for switching on and off means for illuminating the interior of closed spaces, most well-known examples of which are motor vehicles and refrigerators.
  • Such door contact switches suffer particularly from the disadvantage that the full voltage and, above all, the full current of the load must flow through the switch. For this reason the door contact switches in question could be introduced only for use in special cases, namely where relatively low-power loads are operated at low voltages. It is not possible to replace such adoor contact switch'bya door contact and'an impulse relay because a door contact switch closes as the door is opened and opens again as the door is closed and thus cannot send current impulses to the exciter winding of the impulse relay.
  • the object of the invention to provide a circuit arrangement of the kind mentioned initially, i.e., including an impulse relay, designed such that an impulse is supplied to the exciter winding of the impulse relay each time a door is opened and/or closed.
  • a circuit arrangement of the kind mentioned initially i.e., including an impulse relay, designed such that an impulse is supplied to the exciter winding of the impulse relay each time a door is opened and/or closed.
  • a current impulse to the exciter winding of the impulse relay only upon opening and/or closing of the door, and particularly only when desired.
  • This may be achieved in accordance with a special aspect of the invention by providing the shaft of the lock with an additional cam directed upwardly and, upon movement of the door handle contrary to the normal direction of opening, closing the switch, and by having the door handle retained in its rest position by an abutment spring the force of which, relative to the shaft of the lock, is greater than that of the normal retraction spring.
  • a current impulse is given each time the handle of the door is moved in contrast to its normal direction of opening so that the load may be switched on or offjust as desired, either in connection with the opening and closing of the door or independently.
  • a special embodiment of the invention provides for lubricating the hinge pins with graphitized fat which, being conductive, reduces the contact resistance to a small amount.
  • FIG. 1 is an elevational view of a door prepared for a circuit arrangement embodying the invention
  • FIG. 2 is an elevational view of a door frame for the door shown in FIG. 1;
  • FIG. 3 is a diagrammatic view of the lock of the door shown in FIG. 1.
  • two further lines 11' and 12' lead from the hinge pins 16 and 17 at the door frame 18 to a conventional junction box (not shown) which may be mounted, for instance, in the hall if the door shown in FIG. 1 is a door leading into a housing, an apartment, or a room.
  • An impulse relay is housed in a manner known per se in the junction box and is connected in the lead to an electrical load, for example the lead to the illumination means of the hall or room.
  • a transformer is provided for step-down transforming of the main voltage to the supply voltage of the exciter winding of the impulse relay, and the lines leading to the exciter winding are connected in the junction box with the lines 11' and 12 from the hinge pins 16 and 17.
  • a current impulse can be supplied to the exciter winding of the impulse relay as soon as a switch 19, shown symbolically, in the door lock 13 and connected to the two lines 11 and 12 will be closed briefly.
  • the lock 13 shown in detail in FIG. 3 comprises a shaft 20 provided with a square hole 21 to receive the handle axis, a bolt 22, a cam 23 to operate the bolt, and a retraction spring 24.
  • the lock shown in FIG. 3 includes a cam 25 to operate the switch 19, already mentioned, which is connected to lines 11 and 12 of the door shown in FIG. 1.
  • an abutment spring 26 is provided the force of which, acting on the shaft 20, is greater than the force of the retraction spring 24 so that the spring 26 presents a stop or abutment for the spring 24 to be overcome, however, by an appropriate force exerted on the door handle.
  • cam operating the switch and the switch itself may also be arranged differently within the scope of the invention, if desired, so as to obtain different combinations of the movement of the door handle and of the current impulse fed to the relay.
  • acircuit arrangement for switching on and off loads by means of a door handle mounted on a door suspended in a door frame by door hinges and hinge pins, the improvement comprising an impulse relay provided in the lead to the load, the exciter winding of the relay being connected with a switch arranged in the door lock by way of the door hinges and hinge pins, .said switch being closed with the door handle in a, certain position and otherwise being-biased open.

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US3740573D 1970-09-15 1971-09-10 Circuit arrangement with door lock switch Expired - Lifetime US3740573A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19702045527 DE2045527A1 (de) 1970-09-15 1970-09-15 Schaltungsanordnung mit Türschloß schalter

Publications (1)

Publication Number Publication Date
US3740573A true US3740573A (en) 1973-06-19

Family

ID=5782462

Family Applications (1)

Application Number Title Priority Date Filing Date
US3740573D Expired - Lifetime US3740573A (en) 1970-09-15 1971-09-10 Circuit arrangement with door lock switch

Country Status (7)

Country Link
US (1) US3740573A (en:Method)
BE (1) BE772407A (en:Method)
DE (1) DE2045527A1 (en:Method)
FR (1) FR2112961A5 (en:Method)
GB (1) GB1334765A (en:Method)
LU (1) LU63654A1 (en:Method)
NL (1) NL7111604A (en:Method)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4425597A (en) 1982-02-16 1984-01-10 Schramm Wayne E Electronic locking method and apparatus

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1744040A (en) * 1928-06-19 1930-01-21 Elzer John Electric-connection hinge
FR1132635A (fr) * 1955-09-08 1957-03-13 Bloc porte électrique

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1744040A (en) * 1928-06-19 1930-01-21 Elzer John Electric-connection hinge
FR1132635A (fr) * 1955-09-08 1957-03-13 Bloc porte électrique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4425597A (en) 1982-02-16 1984-01-10 Schramm Wayne E Electronic locking method and apparatus

Also Published As

Publication number Publication date
GB1334765A (en) 1973-10-24
BE772407A (fr) 1972-01-17
NL7111604A (en:Method) 1972-03-17
LU63654A1 (en:Method) 1971-12-13
DE2045527A1 (de) 1972-04-06
FR2112961A5 (en:Method) 1972-06-23

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