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Recording Instruments that Assist Economic Operation
Page 122
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TN order to obtain economic operaIlion of commercial vehicles' scene means for checking the distances and times of running and idle periods are essential. Various methods have been adopted and instruments "designed to give accurate information as to the vehicle's movements are available in various types and sizes. Such instruments are of particular interest in view of the new regulations that require the keeping of records which come into force on October 1.
One of the best-known instruments is the Servis recorder, manufactured by Servis Recorders, Ltd., 72-75, Red Lion Street, London, W.C.1. The record is obtained by means of a pendulum mechanism operated by the movement of the vehicle, and having upon it a stylus for marking the chart. The running periods of the vehicle are clearly recorded and the times of such movements are plainly shown. The chart is revolved by a clock, and models to register over periods of from 24 hours to 8days are obtainable.
Another pendulum-operated instrun64
ment is manufactured by W. H. Colt, Ltd., Bush House, Aldwych, London, W.C.2, being known. as the Coltagraph. A feature of this device is that it may be left to the driver or his assistant to change the charts. Each time the Coltagraph is opened a knife point pierces the chart and remains in position until the instrument is closed.
Mechanical and General Inventions Co., Ltd., 10, Charles Street, London, SAVA, is the maker of the Controlograph instruments. The Plus ' Controlograph is of the vibratory type, whilst the Tachy model incorporates a speedometer and is driven from the gearbox. Embodied in the design of the latter model is a signal lamp which automatically warns the driver should he exceed the official, or any predetermined, maximum speed limit.
A special mechanism is incorporated which makes a perforation in the inner circle of the chart every 12 -minutes. Should the chart be removed at any time, the perforation ceases until such time as it is reinserted, thus disclosing any attempt to falsify the records.
The Veeder Odometer is a simple and reliable device for recording mile-. age. It is fitted to one of the frontwheel hubs and records up to 100,000 miles in tenths of a mile. After reaching this total it returns to zero and repeats. F. E. Dickinson, St. Andrew's House, Holborn Circus, London, E.C.:1, markets this instrument.
The Geecen Speedograph is marketed by Great Central Motor Service, Ltd., 133-137, Marylebone Road, London, N.W.1, and' was fully described in our issue dated September 7. This instrument is mechanically driven and records the duration of the running and idle periods, the speed at any point throughout the running period and the distance travelled.
A range of Bruhn instruments is. marketed by Messrs. Dougherty and Janitch, 68, Victoria Street, London, SW.]. This concern has made arrangements to -repreSent Speedometers, (Permanent-Record), Ltd., which will shortly place on the market a complete range of instruments of British manufacture.