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An Upper Saloon
Page 99
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LOADING INDICATOR
TITJRING a recent visit to Southend-on-Sea we examined .1.1 with considerable interest a special type of upper-deck loading indicator which has been in use experimentally for the past six months on one of the corporation's trolley-buses.
This device is the invention of Mr. E. C. H. Stansfield, Cedar Cottage, Salcott Road, Beddington, Croydon. It can be operated pneumatically or electrically, and is controlled by a very small movement of two steps of the staircase leading to the upper deck, the order in which these steps ara depressed adding or subtracting from the figures previously shown.
The purpose of the trip indicator is to assist the conductor. Just before entering, he touches the trip ; by means of it he can tell at a glance how many fares have to be collected on the upper deck, and if he be offered less than the number he is at once aware that there are some evasions.
It must, of course, be remembered that the device is primarily an indicator, but can easily be modified to furnish records if required. It is practically certain that all the ascents will be shown, but occasionally an unusually energetic member of the travelling public slides down the handrails, thus skipping the two recording steps. Provision is therefore made to reset the mechanism by hand if necessary.
The principle of operation is that the 'first step to be pressed is definitely the selector which permits the second step to operate the indicator. Even if persons ascending, and descending be so close together as to be one 011 one step and one on the other, each one affects the indicator as ho reaches the upper or lower step respectively.
In the case of the Garrett vehicle, the device which is installed is operated at 75-lb. to 100-lb. pressure from the air cylinder of the Westinghouse brake.
There are only two gearwheels proper utilized in the indicator drive, but, in addition to these, there are the usual 10-1 single-tooth gears between the two _pairs of main drums. The drums cannot spin; they are definitely stopped after each movement, and this, curiously enough, was one of the most difficult problems for which to find a successful solution. The drums are ins, in diameter with a 1-in. face, and the numbers employed are similar to the standard motorcycle number-plate pattern. The control steps are not hinged, but travel straight up and down as in a weighing machine, and each works a simple valve.
Many members of the public have expressed their appreciation of the indicator, as it saves both them and the conductor much unnecessary trouble. It should do much to prevent fare evasion and losses of revenue through conductors stating that the upper saloons are full when, actually, seats are available.