ILLUMINATING DRIVERS' HAND SIGNALS
Page 57
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A-HAND signal given by a driver is, generally speaking, almost invisible at night, and during the daylight hours it is not always easy to distinguish the meaning of the motions of an outstretched hand. These facts have apparently been in the minds of Messrs.St. C. and D. Mackay, who have patented a signalling device employing coloured lights, which are switched on when the usual signals are given.
Attached to the driver's right hand or glove is a circular body containing
electric bulbs ; the current is supplied from the vehicle battery. The beams of light emanating from the lamp are red, amber or green according to the position of the hand. When the signal is given "I am stopping" by raising the hand to the vertical position, the red light comes into operation. When the driver's arm is horizontal, denoting a right turn, the amber light functions. If the arm be pointing downwards, signifying an intention to turn to the left,the green light is switched on.
The current is switched off by closing the fingers into the palm of the hand. Thus an unintentional signal can Ix nullified and the natural position of the hand upon the steering wheel prevents any wastage of current. The lights work automatically as the arm is moved to the appropriate signalling position. Any parties interested in this patented invention should apply to the gentlemen named,, care of the Edinburgh University Union., Park Place, Edinburgh.