Audex treated ceiling
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Whether applied to the structural roof or floor, or as a suspended ceil- ing. Audex provides an unbroken sof- fit as an alternative to the repeated pattern of a panelled ceiling. Applica- tion is in two coats the backing a natural straw colour, and the finish either white or to the architect's speci- fication from a wide range of colours.
Mandoval Ltd.. P.O. Box 133. 6 St. James's Square, London S.W.1. are the makers. S.E. Asia representa- tives are Duro Industries Ltd., H.K.
GLAZED TILES
For interior and exterior application
THE Shaw-Hathernware Group. 44 Bedford Row, London, W.C.1. have introduced a new finish to their exist- ing range of Twintiles.
Tuscan Twintiles have a rugged na- tural appearance, which is said to have been achieved by a rare fusion of texture and glaze. Suitable for
Tuscon Twintile
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both interior and exterior applications, the tiles have an attractive texture which is difficult to write on.
Available in
co-ordinated colours alabaster white, ice blue, rose grey, honey, olive green, brick red and black the tiles are made in two modules 10 in. by 5 in. and 5 in. by 21⁄2 in. by % in. thick.
PLAN HOLDER Allows quick reference to many drawings
THE Normid plan-holder system enables one to select and use any one of hundreds of drawings or charts in seconds. By its use drawings can be kept clean, secure and immediately at hand in logical order.
Far East BUILDER, July 1968.
The planholders embrace a patent- ed feature to ensure a positive grip on their contents and will accommodate from 30-50 drawings dependent on size. Sizes range from 10 in. to 47 in. in length.
Wall attachments range in size to hold from five to 50 planholders. The swivel pin rack principle employed al- lows the planholders to be slipped on
ror can be tilted through 100 g to re- verse the field of vision.
This same optical system is also used to align the instrument. A mirror deflects the light beam so that it strikes the phototube unit while dis- tances are being measured. When aligning the instrument, this mirror is moved aside, allowing the light beam to strike the eye-piece, thus enabling the operator to observe the point be- ing measured.
Angular measurement is accom- plished in the same way as on a con- ventional theodolite. Angles are read directly using a graduated microscope.
Since the instrument is provided with scales from which both angles and distances can be read directly, it is ideal for setting out work. The ac-
Normid plan holder
or off. the operation being so easy that the wall attachments can be fitted at any required height from the floor permitting instant access and full view of even large drawings.
Normidaire Ltd., 8-10 Oxford Road. Tatling End, Gerrards Cross, Bucks., UK. are the manufacturers.
GEODIMETER
Distance and angles measured simultaneously
AGA of Sweden have developed an instrument called the Geodimeter Model 7 T which measures both dis- tance and angles.
The principle by which distance is measured is the same as that used in previous Aga opto-electronic instru- ments. A light beam modulated by a Kerr cell is transmitted from the in- strument. The beam is directed toward a reflector located at the point to which distance is to be measured. It is turned back by the reflector and re-enters the instrument where it is led to a photo-tube unit. The distance between the instrument and reflector is obtained by determining the shift in phase between the outgoing and incoming signals. The distance is read directly from scales.
Geodimeter model 7T
AGA
curacy is of the order of 10 mm at 500 metres. The scales permit an- gular measurements to be read directly to 1 g and estimated to 20 cc.
The makers are Aga Ab Lidingo 1. Stockholm, Sweden.
TILE SAWS
Three models to cut ceramics or marble
A NEW line of tub or tray tile saws cuts ceramic, quarry and terrazzo tile and marble with a motor-powered, diamond tipped rotary blade.
Three models are available, with 8 to 10 in. blade capacity and 1⁄2 or 3⁄44 h.p. motor. The makers are Felker South Manufacturing Co.. 1900, Crenshaw Blvd., Torrance, Calif. USA.
The combination of distance and angular measurement in a single in- strument was made possible by an en- tirely new optical design and construc- tion. The transmitting and receiving optics used for distance measurement comprise a single system built on a common optical axis. This is possible thanks to an intermediate light-proof wall that separates the two light beams. The instrument is of the periscope type the objective lens is mounted on the vertical part of the periscope. A tiltable mirror mounted above the objective lens is coupled to the scale on which the position of the theodo- lite vertical circle is read. The mir- Tray tile saw
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