Electricity: electrical systems and devices – Control circuits for electromagnetic devices – For relays or solenoids
Patent
1995-08-24
1997-12-16
Fleming, Fritz
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
For relays or solenoids
174 66, H02G 318
Patent
active
056992211
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a support bracket for an electrical unit, and in particular, to a support bracket for connecting an electrical unit to an in situ electrical unit.
Throughout this specification the term "in situ unit" is to be interpreted as meaning any electrical unit which is already installed, such as, for example, an electrical switch unit of a circuit or an electrical socket unit either of which may be mounted on a wall and connected to a cable. The electrical switch unit or socket unit may be mounted directly onto a wall, or may be mounted in or on a patress box, which may in turn be flush mounted in the wall or surface mounted on to the wall. The in situ unit may be of the type which comprises a cover for closing an outlet box, hereinafter referred to as a patress box, and the switch or socket as the case may be would be located in the cover.
There are many occasions when it is desirable to connect an auxiliary unit to an in situ unit, for example, for security reasons, it is desirable that an electrically powered light in a room should be switched on and off periodically while a house is vacant to give the impression that people are present in the house. This in general, requires purchasing an electrically powered timer unit which is connected into a mains electricity supply, for example, connected to or plugged into an electrical power socket. A table lamp is then in turn connected to or plugged into the timer unit. An alternative to using the table lamp is to connect a timer unit into a circuit of a room light, for example, a room light suspended from a ceiling, or a wall light. However, whether one adopts the table lamp alternative, or the room light alternative, once the timer unit has to be connected into the light circuit, or the socket circuit, the services .of a qualified electrician, in general are called for.
It is also desirable in many cases, that an immersion heater in a domestic hot water supply tank should be timer controlled. Where the immersion heater is powered through a conventional immersion heater switch, in order to connect a timer into the immersion heater circuit, it is necessary to break the circuit and connect a timer which includes one or more relays for switching on and off power to the immersion heater. This likewise is a relatively complex task, and because it requires breaking a circuit to the immersion heater, in general, calls for the services of a qualified electrician.
It is also in many cases desirable to connect a dimmer switch to an in situ switch of an electrically powered light circuit. In practice, this requires removing and disconnecting the in situ switch, and either replacing the entire in situ switch with a combination switch and dimmer unit, or alternatively, mounting a dimmer switch adjacent the in situ switch and connecting the dimmer switch to the electrical cable feeding the in situ switch. Irrespective of which course of action is taken, the in situ switch must be removed and disconnected from the cable feeding the switch. This, in general, calls for the services of a qualified electrician.
It may also be desirable that a metering device for the transmission of data to a remote location be connected to an electrical system at a convenient location, such as, for example, adjacent an in situ unit.
It may also be desirable in many instances to connect an auxiliary unit which may be activated remotely by a radio signal, or indeed, a telephone signal for activating an electrical circuit, such for example, an electrical circuit powering a central heating system and air conditioning unit or the like. In such cases, it is desirable that the remotely operable auxiliary unit should be readily easily connectable into the circuit adjacent an in situ unit, for example, adjacent an in situ switch of the circuit.
There is therefore a need for a support bracket for facilitating connection of an auxiliary unit, for example, a timer, a dimmer switch, or any other electrical component or apparatus to an in situ electrical unit, for example, an in situ
REFERENCES:
patent: 2392445 (1946-01-01), Anderson
patent: 3418420 (1968-12-01), Zerwes
patent: 3522595 (1970-08-01), White
patent: 3588415 (1971-06-01), Berne
patent: 3597526 (1971-08-01), Boatwright et al.
patent: 4027097 (1977-05-01), Gillemot
patent: 4163882 (1979-08-01), Baslow
patent: 4318094 (1982-03-01), Ferrigno, Jr.
patent: 5294838 (1994-03-01), Juravich
Hans Sauer, "Relais-Lexikon", p. 206, 1985, Verlag GmbH Heidelberg.
Duffy Patrick Joseph
Hood Oliver St. Clair
O'Leary Gerald Timothy
Fleming Fritz
Paralight Limited
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