Kelvin Voltmeter in wooden case. Case has handle on top and hinged door. Instrument has glass front, hined to open, and rectangular wooden base. Kelvin Voltmeter in wooden case. Case has handle on top and hinged door. Instrument has glass front, hinged to open, and rectangular wooden base.
Case has a brass handle at top, along with white writting. Front of case hinged (two visble on side) with two hooks at other side to close door. Inside of case there are two pieces of wood with a small cutting lined with green felt to hold the instrument. At teh top of teh inside of teh box is another piece of wood which forms a small shelf. The outside of teh box is scuffed all the way around, with a chunk missing from the rear left corner (as you face the front). White writting appears again on the back.
Instrument sits on the large wooden base on three legs, which are set into three oblong metal holders attached to base with two flat head screws. Each leg is adjustable via two circular dials. Front door of instrument is glass with black frame. Small brass handle half way up left hand side as you face instrument, hainges to teh right painted black. Silver metal strip runs from bottom of door roughly 2/3rds of the way up the glass. Glass door opens when handle is turned to the left. Inner door is cushioned with a green felt strip all teh way around. Inside case there is a curved dial at teh top, numbers 0-60 on a scale with a thin metal pin pointing to te dial attcahed to a silver flat piece of metal, similer shape to an '8', though with tapered ends. The pointer is held in place by a thin metal rod suspended between two green pieces of string, which are tied onto two metal rods which go onto attach to a single metal rod that runs the width of the instrument. Two gold coloured pins stick out from the back of the case below the dial face, in order to stop teh pointer going too far either side. A silver makers plaque is attached t the back above teh left hand side of these pins (as you face the instrument). The rest of the mechanism includes two gold coloured flat pieces of metal, shaped like a bow tie and attached to each otehr, with the silver metal piece inetween them. The bow tie shaped piece of metal does not move, and is attached to the back of the case by two circular metal bases. A gold coloured U shaped hook runs from behind all this, runs forward towards the glass door and turns at a 90 degree angle. At the end of this U shape are two hooks which support a bar onwhich teh silver piece of metal sits. One last peg to the bottom right of all this again acts to ensure teh silver metal piece does not over swing. A paper label in pasted to the bottom, next to a small wooden glass fronted box (glass is loose) with thee sets of numbers visible. Four small metal hooks of various shapes and sizes are loose in bottom. Outer left hand side of case (as facing glass front) is black metal with some scuffs, and a small handle with plastic coating at the top. Along with a handle on the opposite side this controls the metal rod suspended from green string (mentioned above). Could this be used to stop the dial when in motion? Reverse of instrument shows the backs of teh two circular metal pieces seen from teh front, one of which (left side as facing back) has a connection for an electrode. Another connector prodriudes from between the two circular metal parts. eight screws with nuts are also visible, as are two horitontal lines c 1/3rd and c2/3rd of teh way up from the bottom. Left hand side has another small handle with plastic coating at the top, with a rectangular glass window below this, runing down most of the side. Top of the base at front has a semi-circle cut into it, to help with removal from larger wooden case.
Alwyn Davies refers to this as a 'Quadrent Elecrometer'. Old lable on A4 sheet found inside case, see photos.
Asbestos Inspection - Non-Asbestos
