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The Supply Department.

19th October 1911
Page 23
Page 23, 19th October 1911 — The Supply Department.
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Which of the following most accurately describes the problem?

A` New Lock Nut.

A lock nut of more than usual merit has been put, on the market by the Nut, Bolt and Bar Co., Ltd., of Exchange Chambers, Leeds. This is known as the " Mansell" patent nut lock, and it is illustrated herewith. Many of these nut locks have been severely tested, on fish-plate bolts, by one of the largest railway companies in the kingdom, upon a portion of its main line where there is constant and heavy traffic of express trains upon a fairly-severe gradient ; after they had been in use for a period of 16 months, not one of them showed the slightest sign of working loose. They have also been fixed to take up the tension on the springs of a 30-ton mineral wagon, in place of the ordinary type of nut, check nut and split pin, and in this service, for some months, they have given complete satisfaction.

A reference to our illustration shows that the nut is divided into two essential parts : a split nut with a conical outer surface, and the nut proper, which is deeply counter-bored to the same taper as the split portion. They are supplied in standard Whitworth threads, and the efficiency of this device depends upon the friction between the various surfaces ; in a nut of this design this is considerably more than twice that of an ordinary type of nut, as the wedging action of the nut proper over the coned outer surface of the split nut gives a grip which it is claimed is unobtainable in any other nut-locking device. We learn, too, that even on a bolt from which the thread has been partially stripped, the grip is all that could be desired. One of the greatest advantages attending the use of this device is that the bolt may be made considerably shorter than would be admissible were a check nut, split pin and washer employed.

From many sources we hear capital reports from users of the "Mansell" nut lock, one of which, from the Yorkshire Patent Steam Wagon Co., of Pepper Road, Ilunelet, will be of considerable interest to those of our readers who are responsible for the running and maintenance of steel-tired wagons. The Yorkshire Wagon Co. write to the Nut, Bolt and Bar Co. as follows: "With reference to the patent nut locks which you supplied us, we are pleased to say they have given every satisfaction. We have these nut locks fixed on our wagons, all parts of which have to stand severe tests, owing to the great vibrations and strains in carrying heavy loads on steel tires over streets paved with granite setts. Previous to the use of these nut locks, our drivers were continu

ally having trouble through nuts working loose, and losing one or more nuts on a journey, but, of the patent nut locks supplied by you, not one has worked loose or even required tightening. These nut locks have, therefore, proved perfectly effective."

A New Fitting for White and Poppe Carburetter.

The accompanying illustration shows a neat and practical form of extra air and scavenging valve, as fitted to a White and Poppe carburetter. The device is the invention of Mr. F. Bullock, of 135 Great Ducie Street, Manchester, and consists of a special elbow, in the bend of which a little valve is fitted, the lift of this valve being effected by a rotary face cam, which is mounted on a spindle parallel to the stem of the valve. The face cam is intended to be actuated by means of a Bowden wire, and its periphery is grooved for this purpose. The chief advantages claimed for this device is that the mixture can be weakened or the cylinder scavenged with cool, clean air without in any way altering the mixture setting of the carburetter itself.

Tags

Organisations: Supply Department
People: F. Bullock
Locations: Manchester, Leeds

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