September_1967 — Page 37

materials and equipment

PROTECTive coaTING

Aggregate-filled Compound Prevents Damage to Walls

A PLASTIC-BASED protective coating, has been developed by British Paints Ltd., Portland Road, Newcastle, UK, as a means of preventing damage caused by vandals to walls in public lavatories, subways, etc.

Available in a range of high-build textures, it is applied in a series of layers, which cure to form a hard, durable coating that is claimed to resist knife damage and to make any legible impression with pencil, chalk or ball-point pen almost impossible.

The coating is built up in three stages. Initially, a thick layer of two- part epoxy resin is sprayed on at a rate of between 20 and 25 sq. yd. per gal.. allowed to become tacky over a period of 1⁄2-3 hr., and cover- ed with a layer of fine aggregate.

Once this has cured, after approxi- mately 16 hr., the final finish can be

Vandal-proof coating

applied in the form of a priming coat and two coats of polyurethane enamel, tinted to the desired shade. Sprayed on at between 60 and 70 sq. yd. per gal., these harden within 24 hr. and cure fully within 5-7 days. The resultant surface has a hard, heavily-textured finish, overlaid with a high gloss.

Agents in Hong Kong are Bank Line (China) Ltd.

LIGHTING FITTINGS

Column- and Wall-mounted

Models in External Range

RECENT additions to the Frederick Thomas range of external light fit- tings comprise two units with similar, spherically-shaped plain glasses

one for wall and a second for column

Բ

Wall fittings from Thomas range

mounting and a third model, for wall fixing only, having a mushroom- shaped, smoke-grey diffuser.

The globular wall fitting consists of a 10 in. diameter bowl of crystal glass, bedded on to a Neoprene gas- ket within а circular base plate which, in turn, is mounted on a 11⁄2 in. o.d. tubular metal stem, giving an overall height of 1 ft. 9 in. A steel arm extending at right angles to the fitting ends at a circular backplate. secured to the wall by four screws. The power cable enters through the backplate and terminates at the B.C. lamp holder within the fitting itself.

While similar to the wall unit in basic design, the column-mounted model achieves an unusual appear- ance by mounting a 12 in. diameter glass sphere on a 7 ft. 6 in. high, heavy-gauge steel stem with a 11⁄2 in. o.d. This is held in the ground by an 18 in, root and base plate.

The third model is wall mounted- this time with a square, four-screw backplate. It has a bubbled grey dif- fuser, widening out from a rounded neck into an almost flat-topped mush- room shape, which partially obscures the bulb and gives a softer lighting effect than that provided by the other two fittings. The diffuser rests in a metal collar stemming at right angles from the back plate, and below this is a contoured steel tube through which the cable enters, terminating at the lampholder positioned in the neck of the diffuser.

Frederick Thomas Ltd.. 46 St. James's Place, London, S.W.I, are the makers. They are seeking agents in S.E. Asia.

VENTILATORS

Design Based on Research into Flow Patterns

TWO new types of fan-powered ventilator, the "Hurricane" and the "Typhoon", have been produced by

Far East Architect & Builder September, 1967

Colt Ventilation & Heating Ltd., Surbiton, Surrey, UK.

The design of these ventilators is based on two years of research into the flow patterns created by the fans used. The fan is placed in a circular duct with a flared intake so that the whole area of the fan blade is used to move the air. A 19 in. fan fitted in the duct will therefore handle 6,640 cu. ft of air per minute - 1,500 c.f.m. more than a fan without the duct.

The shutters conform to the vortex pattern of air created by the fan. Consequently, when the shutters are open they do not obstruct the air flow but increase it. For example, a fan handling 5,460 c.f.m. without the shutter assembly will, with the shut- ters fitted, handle 5.900 c.f.m.

The cowl of the Hurricane, al- though horizontally-mounted, offers little resistance to the air flow. The cowl of the Typhoon is open at the top and flared outwards so that the air is discharged upwards with en- ough force to prevent even tropical rain from entering.

Both types of unit are manufactur- ed of either aluminium or 'Coltglass' glass-fibre a material resistant to

Hurricane ventilator

corrosion in all normal industrial atmospheres. The Hurricane is available in eleven models delivering from 949 c.f.m. to 12,000 c.f.m. The Typhoon is available in nine models delivering from 1,700 c.f.m. to 15,500 c.f.m.

Singapore agents are Sime Darby Holdings Ltd.

DOOR CLOSER

Compact Design Produces High Power

AN ALUMINIUM door closer of slim, modern design, the Briton 2000 is claimed to combine high power with small size. It features a hold-open facility, concealed fixings and other refinements.

The closer, which works on the rack-and-pinion principle, can be used on left or right-hand-opening doors up to 7 ft. high by 2 ft. 9 in. wide, and weighing 110 lb. maximum. It measures 94 in. long by 13⁄4 in. high by 1-29/32 in. deep, with 10%- and 95%-in. arms, and is offered in standard finishes of silver, light gold and brown bronze.

Six fixing screws are concealed beneath black polypropylene clip-on end covers. A heavier model, the Briton 2002. designed for doors

61