SE MUNICIPAL MACHINES
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include the steel-slatted floor, built as a unit for ease of incorporation by vehicle or body -builders, is a 15-cubicyd. refuse collector having as its basis a Dennis six-wheeled municipal chassis, and employing . a • large Archimedean screw for loading and
consolidating: • The last-named is normally accommodated between the container. and the cab; in what is, in effect, a lowsided hopper. ,It extends through hole in the front of the container and rotates during loading at about 1 r.p.m. Refuse is conveyed by this propeller from the hopper into the container, which becomes tightly packed. For discharging 'the load, floor, barrier and propeller are moved rearwards, the shaft of the screw having dog clutches which engage with The forward-mounted driving gear.
A Precaution Against Damage.
An interesting detail is the provision of a 2i-in. clearance around the periphery of the propeller. This permits protruding articles to pass along without damaging the casing or barrier, whilst normally refuse coltacts in the intervening space and serves to maintain the efficient working of the device. A new feature of the floor is the provision for lubricatiOn of the sl at-j oints.
For handling large refuse bins, a Scammell four-wheel-bogie semi-trailer has been ingeniously equipped. Gear is provided for loading and unloading the 1i-cubic-yd. bins, with the aid of a ramp, by hand or hydraulic means. A system of cables is employed, and the mechanism is well worth close investigation. The frame construction of this vehicle is also ii otewarthy.
A good example of the Principality
floor is found in a Leader 4-ton refusecollector shown by Morris-Commercial Cars, Ltd., Adderley Park, Birmingham. In this case the floor runs on ball-bearing offset rollers. There is a spring-balanced tailboard hinged from the roof, whilst the upper portion of the rear is closed by a Brady roller shutter, also spring-bala need. Both sets of springs ate "mounted neatly under the roof at the front. The loading step is retractable, and the tailboard height is quickly adjustable.
An interesting feature of a Bedford new-type 2-t9n -refuse-collector is the low-sided body, -which gives it a
pleasitig Appearanee It has also a loading height of only 4 ft. 6 ins., tins _being possible by "preserving a 10W:floor level, to do which it has been raised' whore it passes over the rear axle. The slope thus necessitated, we alre,• infornied, does hot interfere with discharge, the B. and E. hydraulic tipping gear affording an angle of 45 degrees. The covers are of light aluminium and wood construction, with air-damping devices to give silent closing.
Equipped with an Eagle refuse body, a Bedford 3-tonner is also on view. Visitors should note the eccentric-pulley cable operation for the covers.
Solitary representative of the batteryelectric type, an Electricar with 'an Hygienic Refuse Collector body is an attractive machine shown by Electricars, Ltd., Lawley Street, Birmingham. It has a capacity of 7i cubic yds. and is one of an order for nine of this make received from Leyton Corporation. The model shown has covers of the type that open automatically as the bin is raised for emptying, and is equipped with electric-hydraulic end-tipping gear. It has Britannia nickel-iron batteries.
A Separate Pumping Engine.
Among the tankers—gully and cesspit emptiers and street washers—there is an interesting Scammell semi-trailer of 1,250 gallons capacity, with squeegees and spraying gear, equipped with a separate 10 lap. engine at the rear for pumping. It has a high " box " seat at the front for the operative, beside which are all the controls and from which he can obtain a commanding view. Other excellent machines in this class ..ere-shown by the Dennis and S. and D. concerns. They will well repay scrutiny and possess numerous attractive features.
We noticed two sweeper-collectors in the Show—that made by Lewin Road Sweepers, Ltd., Hunslet, Leeds, and a product of Johnston Brothers (Contractors), Ltd., Crutched Friars, London, E.C.3. The former has a Bedford chassis as its basis and incorporates three compartments, two of 20 cubic ft. for dust drawn in by suction, and one of 60 cubic ft. for solid matter lifted mechanically. There are water sprayers at the front, the brush is set straight across the frame, and a " cutter-out " brush is provided on the near side where most sweeping is required.
A device with a similar function is found in the Johnston vehicle, which is a low-powered machine designed for one-man control and economic operation. It is stated to work all day on .374 gallons of petrol.
'Numerous Advances in Rollers.
Many new rollers are making their first appearance at this exhibition. One of these is a 2-21-tanner made by Marshall, Sons and Co., Ltd., Gainsborough, and having a Morris industrial-type four-cylinclered. engine. It is also available with a two-cylindered oil engine. Rear rolls of extra width for grass (6 'ft. overall) can be fitted. It has two speeds and a differential. A larger model, weighing 11 tons, has a Gardner three-cylindered oil engine and a two-tine scarifier which can be shifted readily to any one of four positions across the rear.
John Allen and Sons (Oxford), Ltd., Oxford; is showing an interesting 1-tonner which is claimed to be the first road roller powered by a Villiers twostroke engine_ The ingenious means for widening the track should be investigated. On the Allen 35-50-cwt. roller an Austin 7 h.p. power unit, complete with electric starter, is used.
Wallis and Steevens, Ltd., Basingstoke, is displaying a 2f-ton model with National two-cylindered high-speed oil engine, which has. four speeds. A machine of similar weight can be supplied with a Morris petrol unit.
There is a wealth of interest among the rollers, but perhaps the most marked development is the use of a Sinclair hydraulic coupling, in the transmission, by Aveling-Barforel, Ltd., Grantham. The machine thus equipped on the stand is said to be the first to incorporate a fluid drive and is for Sheffield Corporation.
A return to the limelight has been made by Thomas Green and Son, Ltd., Leeds, with a new machine weighing 6-9 tons. Bearing the griffin symbol, it is powered by a Blackstone threecylindered oil engine, which drives through spiral-bevel gearing.
Finally reference must be made to the handy 2-2i-ton roller just introduced by Millers' Machinery Co., Ltd., Great Winchester Street, London, E.C.2. It is called the Millars'-Moore wheeled roller and can be towed to the scene of action and then inverted by swinging the drawbar about the axle through 180 degrees. An accompanying drawing explains the idea. Note haw the bar can be offset so that the towing vehicle need not traverse unrolled ground.
In the sphere of excavating and dumping appliances the products of E. Boyden. and Co., Ltd., Manchester, and the Chaseside Engineering Co., Ltd., Enfield, should be inspected. The Muir-Hill loading shovel, of the first-named, incorporates numerous improvements, of which • a redesigned beam and bucket Which widen the scope and enhance the efficiency of the machine are outstanding. An ingenious feature of the concern's dumper is a loose swinging plate in the bottom of the container which prevents sticky material from adhering.
A new Chaseside appliance is the Lo-Gravity dumper incorporating a Ford 10 lep. engine and built largely of Ford parts. It has a big ground clearance despite its moderate height and discharges through the bottom of the container.
Only just within the field of this paper, but of high technical interest, is the new Crawl-Air compressor ot the Ingersoll-Rand Co., Ltd., 165. Queen Victoria Street, London, E.C.4. It runs on pin-jointed tracks, and incorporates a Waukesha oil engine driving a two-stage V-type threecylindered compressor of 130-cubic-ftp.m. capacity. The outstanding point is the method of propulsion. Each track is driven by a rotary air motor fed from the main storage tank at 100 lb. per sq. in. It is, of course, controlled and steered by air valves. .