AN EFFECTIVE BIKE SIREN
If you have nimble fingers you will be able to make a bike siren out of an empty tin and a few odds and ends. Figure 1 shows the siren seen from the front. The tin (a) has a hole in the side, through which a round wooden stick (b) is inserted. The hole must be slightly larger than the diameter of the stick. A strong rubber band is threaded through four other holes in the tin, it is taut, and tied. in .a knot (c). One end of the round stick is firmly tied to this rubber band. A piece of string (d) is tied to one of the rubber bands, and passed through a little hole in the tin. This hole must
be so placed that the stick is pushed a little distance outside the box when the string is pulled. In between these ■two holes, yet another hole is hpred,this time so large as to fit an ordinary bicycle nut and bolt. Figure 2 ,show* the siren from the side; you will recognise the same holes as in figure 1. As shown in figure 3, the siren is attached to the left fork of the bicycle. It can be fixed by means of a strip of tin or leather held on to the tin by the nut (e). The string (d) is then tied to .the left handlebar, and the wooden stick (h) is adjusted so that the end just touches the spokes of the_ front wheel if the string is pulled slightly. The stick will then hammer wildly on the tin. The holes in the tin must, of course, not be so sharp that they cut the strings. ,
Permanent link to this item
https://paperspast.natlib.govt.nz/newspapers/ESD19380212.2.27.20
Bibliographic details
Evening Star, Issue 22881, 12 February 1938, Page 8
Word Count
286AN EFFECTIVE BIKE SIREN Evening Star, Issue 22881, 12 February 1938, Page 8
Using This Item
Allied Press Ltd is the copyright owner for the Evening Star. You can reproduce in-copyright material from this newspaper for non-commercial use under a Creative Commons New Zealand BY-NC-SA licence. This newspaper is not available for commercial use without the consent of Allied Press Ltd. For advice on reproduction of out-of-copyright material from this newspaper, please refer to the Copyright guide.