April 1. 1919.] 



THE INDIA RUBBER WORLD 



359 



SOLE-ROLLING MACHINES. 



The center portion of most of these machines extends prac- 

 tically to the ceiling and a symmetric arrangement of outlets 

 would probably cause bad shadows. It is, therefore, desirable 

 to have outlets at both the front and rear of the machine ap- 

 proximately as indicated in Figure 3. Relatively small lamps 

 can be used with deep bowl reflectors to direct the light on the 

 work. Such an arrangement will enable the operators to make 

 adjustments with facility and gage or inspect the stock accu- 

 rately. 



SOLE CUTTING. 



The operators on this process are working rapidly with sharp 

 knives and if the artificial light is of a character that is not 

 well suited, the danger of cutting one's self is increased. It is 

 well, therefore, to supply a fairly high intensity of evenly dis- 

 tributed light from units equipped with proper reflectors to 

 shield the eye and hung well out of angle of view. The scheme 

 pictured in Figure 4 will prove entirely satisfactory. It will be 



Fig, 3— Typical Layoux for Sole-Rolung Machines. 

 0=25 OR 40-Watt Mazda Lamp with Deep Bowl Reflector. 

 noted that this gives the maximum illumination at the ends of 

 the boards or tables where the workmen stand and yet does not 

 confine the bright illumination to a small circle, which is quite 

 trying to the eyes. A row of the same units on slightly wider 

 spacings is suggested for the center of the room. These would 

 give good general illumination when the tables were not in 

 use. ' All the lamps should be hung as close to the ceilmg as 



Fig. a — Typical Sole-Cutting-Room Layout. 

 (g)=7S-WATT Mazda C Lamp in RLM Standard Dome Re- 

 flector. 



possible. This is assuming that ceilings in general do not run 

 over 12 or 14 feet in height. 



CUTTING linings. 



It would seem to be a rather difficult matter to get sufficient 



light beneath the head of the presses from an overhead unit, 



but experience has shown that a moderate intensity of well 

 diffused general illumination meets the conditions in an excellent 

 manner \ tvpical case is pictured m the night photograph 

 Figure 5 No drop lamps aie used, but 100-watt Mazda C 



rpicAL Overhead Illumination of Presses, Eliu 

 INC Shadows. 



lamps in dome type steel reflectors are used on 12-foot centers 

 close to the ceiling. Absence uf drop cords makes, a neater ap- 

 pearing sliop. 



UPPER CUTTING. 

 .\ h gh intensity of general illumination is advisable in this 

 part of the plant. Work is done with sharp knives and must 

 lie cut accurately to line. It is advisable to supply approximately 

 1 to ly4 watts per square foot of floor area. A splendid example 

 of the application of this method of lighting is given in the 

 night photograph, Figure 6. Every board and bench is clearly 



\i Overhead Illlmtwtion of Upper-CutiiivG 

 KooiM, Elimin\ting Shadows 

 visilile and tliere are no annoying shadows or bright light sources 

 hung low t(i fatigue the eye. 



MAKING-UP ROOM. 

 Here also the high intensity general lighting system should 

 he applied. This is far more desirable than the system used in 

 many instances of drop lamps hanging close to the racks. A 

 typical layout might be such as that shown in Figure 7. This 

 implies the use of 100-watt Mazda C lamps in dome reflectors 

 on approximately 10-foot centers. In lighting work of this char- 

 acter it is essential to supply an. intensity so that the most diffi- 



