This is the Forbes and Lomax 3G2TBELL/AB, a three gang switch composed of 1 momentary switch and 2 two way dolly switches on an invisible plate with antique bronze button, manufactured by Forbes and Lomax.
The Invisible plate is inspired by the 1930s glass switches but with all the advantages of modern technology, the Invisible Lightswitch has become synonymous with Forbes & Lomax. Switches and dimmers have 3mm bevelled transparent acrylic plates which are secured without the use of fixing screws.
All momentary switches (contact-closure switches) require an in-line dimming pack to enable them to work as a dimmer, or a relay pack to have an ON/OFF function. The button dimmer controller allows dimming from more than one location, and it can be used to control home automation systems.
The plates are flush to the wall and are supplied with brass, nickel silver, stainless steel or antique bronze toggle switches, dimmer knobs or buttons. 0.5mm 'inner plates' of primed aluminium sit behind the Invisible plates which can be decorated in the same way as the walls giving the illusion that the wallpaper or paint finish runs seamlessly behind the switch plate.
Dimensions: 22.2mm diameter button dimmer, with no plastic trim.
Invisible plates and rocker switches with 2mm thick acrylic plates complete the range.
The Forbes and Lomax Momentary / contact closure switches require an in-line dimmer pack to enable them to work as a dimmer. They can be used for lighting control and home automation systems. The dimmer pack has to be located in an accessible void, out of earshot; any noise generated when dimming will come from the dimmer pack - no noise will be emitted from the switch itself.
You can achieve multiple switching locations on one lighting circuit by wiring the buttons in parallel; all the locations must have momentary controls, and each location can be used to dim. However, you cannot use normal switches on the same circuit as the button dimmer.
To use a momenary control as a simple ON/OFF switch, you need to put a link to the in-line relay pack.
Please note: The button dimmer / momentary switch will only work in conjunction with an inline dimmer (see the required items). The way it works is: one in-line dimmer (impulse dimmer) per button dimmer. For 50-1000W 4A dimming you can order the ID0401 and for LED dimming you can use ID0101LE.
|Switches & Sockets Specific|
|Back Box Depth||35mm|
|Brand||Forbes and Lomax|
|Plate Dimensions||146mm x 86mm|
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