| Random files - Gn15 |
Lever mechanism from above86 viewsThe black bits are an earlier attempt using cotton above and below the shaft. It was too fiddly to get taught enough t work satisfactorily.
you'll also note that I ran out of flags and had to fill the space with "concrete"!
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Building the framework52 views...from a scale drawing produced in CorelDraw. I've no idea what wood it is, as the shopkeeper didn't know either - it just looked about right.
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The whole shebang88 views
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Floor finished and weathered77 views...and a cover made for the mechanism: A 0.030" plastic side and 0.015" wrapped around the top, front and back. This also required an "inner-side" cutting for the shaft-side that fitted up against the existing, fixed side piece, with a cut-out around the mechanism.
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Pin soldered onto lever41 viewsI reckoned that relying on glue to take the sheer force of the weight transfer from the brass prongs to the styrene levers would be asking for trouble. So I drilled 0.6mm holes and soldered in 10mm of brass wire, which passes through a hole in the plastic lever and is superglued on the other side. It's a kind of micro-bolt.
The ends were later decorated to look like bolt heads / nuts.
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Prongs50 viewsThe prongs that insert into runners in the wagon are brass square section, soldered together.
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Tiles being placed103 viewsStone flags made from air-drying clay ("Plus" - a DAS-lookalike) are stuck into a bed of 50/50 PVA and ready-mix plaster/filler from the DIY shop. This facilitates getting an even(-ish) surface despite the flags being of varying thickness.
Some of the flags have been deliberately broken.
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Finished A-frames and prongs65 views
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| Last additions - Gn15 |
Another view of the finished article74 viewsMar 20, 2006
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Tiles being placed103 viewsStone flags made from air-drying clay ("Plus" - a DAS-lookalike) are stuck into a bed of 50/50 PVA and ready-mix plaster/filler from the DIY shop. This facilitates getting an even(-ish) surface despite the flags being of varying thickness.
Some of the flags have been deliberately broken.Mar 20, 2006
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Floor laid, being grouted80 viewsAll tiles have been placed and are being grouted with watered-down compound of 50/50 filler and PVA: Splurge it on with your finger, wipe it off with a piece of kitchen roll.Mar 20, 2006
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Lever mechanism from the side82 viewsThe plastic square-section on the driven (right) shaft is a tight fit, allowed to slip, whilst the piece on the left shaft (attached to the lever) is super-glued on. The two are connected by a length of brass wire.
When the driven shaft turns, the right-hand piece turns with it, pulling the brass wire and ultimately the lever with it, until a further piece (behind) hits one of the detents that are glued to the wall of the casing.Mar 20, 2006
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Lever mechanism from above86 viewsThe black bits are an earlier attempt using cotton above and below the shaft. It was too fiddly to get taught enough t work satisfactorily.
you'll also note that I ran out of flags and had to fill the space with "concrete"!Mar 20, 2006
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Floor finished and weathered77 views...and a cover made for the mechanism: A 0.030" plastic side and 0.015" wrapped around the top, front and back. This also required an "inner-side" cutting for the shaft-side that fitted up against the existing, fixed side piece, with a cut-out around the mechanism.Mar 20, 2006
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The Works131 viewsThis is where the clever bit happens.
At the top left is a microswitch, with another opposite the motor. Just touching the top switch is a lever (Plastruct square section with an M1 screw in it for fine adjustment), superglued to the shaft. The lever for the second switch has rotated 300 degrees and is now under the switch.
The shaft rotates at the same speed as the shaft above that carries the cable drums.Mar 01, 2006
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The "pulleys"145 viewsThe guys at the works couldn't lay their hands on a big enough pulley that would lift the mechanism in less than one rotation. Then Alfred spotted these old cable drums lying around in the stores, duly liberated the remaining cable from them and cut the rims down so that they could fit close to the floor.Mar 01, 2006
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