THE BICYCLE IN THE FIRE SERVICE.
(WRITTEN FOR FIRE AND WATER.)
AMONG other plans which have been presented for using the bicycle in the fire service are those given in the accompanying drawings, the first of which shows a method for carrying a moderate sized chemical equipment on three wheels. The chemical tanks, pipes, and connections are of ordinary construction, and placed upon a spring platform A. This platform is pivoted at B, and set screwed to the rear shaft between the two rear wheels, as shown.
There is a saddle of each of the three wheels, and a fireman can ride each and pedal, the propelling being effected with gears.
The mode of steering, as suggested in this design, is novel, as the foremost rider performs this by means of the wheel E, which acts upon the forewheel mechanism in a peculiar manner. There are beveled gears at G, one of which is keyed to the pivot-stud C, and the other to the shaft F.
The braces extending from the frame U, are supplied with bearings for this shaft. As the wheel E is also keyed to this shaft, the forewheel can be governed by revolving the same as required, and the apparatus steered. Fig. 2 is a design for a protective outfit, using one fore and two rear wheels, and furnishing saddles and propelling facilities for three firemen.
The framework is much like a tandem except that arrangement is provided for adjusting the forewheel opposite the centre of the machine. The body of the apparatus may be wood, and set upon an extension frame of tubing, the latter being fastened to the rear shaft and middle of the frame.
The rear wheel shaft will need to extend through to the sprocket gear of the wheel on opposite side, and the sprocket gear for the forewheel chain set screwed in the centre.
The wood body can be made of sufficient capacity to carry several fire extinguishers, rubber blankets, hooks, an axe or two, and other usual apparatus.
A method which might be applied to carrying a hook and ladder outfit on five wheels is presented in fig. 3, in which two ordinary extra-weight bicycles are arranged to work together, on either side of the body work of the truck as shown.
The shafts of the wheels and the sprocket gears reach from the bearings of each rear bicycle, and work therefore in harmony, besides furnishing support for the spring basis for the truck shelving and general equipment. Steering is done by the firemen on the frout wheel. The frame is of the continuous pattern, ending with a bracket at A, where the forewheel connection is made. The machine is designed to be propelled by beveled gears.
The shaft B operates in bearings as shown, and a beveled gear at each end engages with like gears on each of the crank shafts. The wheel sprockets of each rear w’heel are driven by chain. This combination furnishes a practical carriage for two or three light ladders, and the several pieces of apparatus required.
What may be termed a patrol tricycle is given in the design in fig. 4, in which calculations are made for carrying three firemen to a fire or on patrol service. All three men can pedal.
An odd type of propulsion is devised, consisting of a large gear B, which is keyed to the regular sprocket gear shaft, and this gear meshes with the cogs of a smaller gear C, which is attached to the shafts of the rear wheel.
The fore rider’s crank gear engages with a small gear that is furnished with a bevel on one side, which bevel runs in with a bevel gear on shaft A, thus connecting the propelling power of each rider.
A rear extension D serves to support a supply chest E, in which the firemen can carry extras or supplies of any sort. Three firemen can make quick progress on a machine of this pattern.
The illustrations accompanying this article show designs for chemical and protective outfit (figs. 1 and 2), and ladder truck and patrol cycle machines (figs. 3 and 4).