materials and equipment
NON-CONCUSSIVE TAP
A lever operated in. non-concus- sive tap has been introduced into the Fairline range of fittings by James Bar- well Ltd., Great Hampton Street, Bir- mingham 18, UK.
Suitable for high pressure drinking or low pressure hot water supplies, the fitting, model 23, is operated by a quarter turn and incorporates the basic mechanism of the conventional Fair- line 21 non-concussive tap which is of glandless design.
Once the control is set it will remain in position so that any required rate of flow is maintained. Adjustment is also provided so that speed of closure can be controlled and water hammer elimi- nated. The tap can be wrist operated
¡
Lever-operated Fairline tap
and is especially useful in hospitals or where infirm or handicapped people are accommodated.
Agents are Acme Sanitary Ware Co. Ltd., Hong Kong, and Polychem Ma- laysia Co., Kuala Lumpur.
INTERCOM
Useful for large building sites, a recently introduced paging system takes the form of a portable five-re- ceiver VHF radio. The transmitter may be mains or battery operated.
The radio works with a di-pole alu- minium aerial and sends individual signals in the form of fast or slow blips to any number of up to five pocket receivers at ranges of up to 1,000 yd.
Controls for the system comprise
on and off switches, five numbered switches for respective receivers, two
and a further two for manual or auto- matic operation.
Pressing the manual switch causes the signal to continue until released,
OO
Radio Intercom paging system
while automatic signalling ceases after about 10 seconds. Each receiver is en- closed in high-tensile plastic and con- tains a miniature battery that may be recharged automatically after each day's work by inserting the receiver in- to one of the five slots forming a charging rack on the front face of the transmitter. The transmitter's 12-volt battery can be recharged through two cables.
The makers are Radio Intercom Ltd., Ottery St. Mary, Devon, UK.
AIR PURIFIER
Graham Banks Associates, 155b, Widmore Road, Bromley, Kent, UK, are marketing a desk-top electrostatic precipitator that is said to remove 90 per cent. of the dust, bacteria and pol- len in the local atmosphere.
Called the Nectair, the unit is con- tained in a polished teak case, 1ft. 6in. deep by 10%1⁄2 in. wide by 6in. high. It
switches determining the signal speed Nectair purifier
H
NECTAIR
comprises a two-speed fan and a series of removable positively-charged metal plates offering an area of about 9 sq. ft.
Particles of 0.1 micron and above in the air passing into the purifier are negatively charged before passing to the plates where they are held by elec- trostatic attraction, allowing clean air to be emitted from the grill. A clip-on back allows the plates to be removed at intervals of three to four weeks and washed in detergent and water.
One unit serves an air space of 10,000 cu.ft.
PLAN FILING
The Hang-A-Plan filing system an- nounced by Arnos Melbourne Pty. Ltd., 1226 Nepean Highway, Chelten- ham, Victoria, Australia, holds up to 100 sheets in a friction binder, without punching or stapling.
Sheets can be inserted or removed quickly without removing plans from the binder, or the binder, complete with plans, can be thrown over a desk and turned over for easy inspection. Each binder is fitted with a plastic pro- tector to cover identification cards, and end caps are coloured so that any
T
Hang A Plan in use
specific binder may be identified with- out trouble.
A mobile unit or a fire-resistant cabinet take ten binders with sheets of up to 30 in. wide and 40 in. deep. Alternatively the binders are fitted with hooks for rack mounting.
ALIGNER
Designed specifically for the con- struction industry, the Model LT-3 precision reference light source saves time on jobs where accurate alignment is required. It operates unattended and does not need continuous or re- peated sighting and adjustments.
The standard model provides a beam of perfectly straight red light that can serve as a reference for pipe laying and
Far East BUILDER, March 1969
41