The Bungaloft Report – Lighting

A temporary reading light
While we await my completion of the fold up bed design/fabrication project, it was clear we needed something to serve as a reading light over the temporary bed location. I had made several variations on this simple paper shade – an homage to the design work of Ingo Maurer. It utilizes a fire resistant paper used in electric motor windings that happens to have both a nice texture and color.

It also happens to work well with the color splash produced by my favorite MR16 dichroic glass pattern. One of the small things I regret about the gradual switch to OED sources is the loss of this particular feature of halogen sources.

The source fitting.
The electrical journey begins here for the design we have come to refer to as Matterhorn. It is another low voltage cable design that uses a variant on a fixture head design originally deployed in a pendant design and then a conventional taught cable design before being modified for use in this design.

The lamp head.
The lamp head in the Matterhorn design is designed to slide along the cable pair. It is made from aluminum and has a bi-pin socket for an MR11 lamp.

The cable guide
The cables pass through this device on their way down to the counterweight. There is a teflon liner running through each tube that serves to supply just the right amount of friction to make the cable passage smooth while allowing the lamp head and counterweight to stay in a given set position. There is also a mechanical isolation between the two halves of the circuit that would prevent a short-circuit in the event that the cable were to wear through the liner. A final level of security is provided by the fact that the curved tubes are anodized – effectively rendering them non-conductive.

The Counterweight
The final piece of the Matterhorn system is the counterweight – a hollow, roto-cast form designed to use a measured amount of sand to fine tune its effectiveness in maintaining the position of the lamp head. All of these parts were hand-made in my shop through strictly analog means. The pattern for this form was hand carved in wood before being finished as a plug for the mold making process. The final part was then cast using a shop-built roto-casting machine

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