Other Fatigue Eliminating Devices.
The other fatigue eliminating devices exhibited are useful more as suggestions than as object lessons. There are various types of packets upon which materials are so placed as to be most handy to the worker. These packets are filled by unskilled, that is to say, young, or inexperienced, learning or unskilled workers in such a way that the material can be removed from the packet by the high-priced man with the least amount of effort possible. Filling the assembly packet is an excellent training to the unskilled worker, as will be shown later. One of these packets is contributed by a local manufacturer of cotton cloth.
The other devices for holding materials in position consist of two devices for holding motion picture films in position so that they may be studied with the least amount of effort possible.
Fig. 17
These chairs are of type four, devised to relieve fatigue caused by vibration. Besides the chairs, foot-rests were devised to hold the feet without any vibration from the floor; and, also, special treadles.
Fig. 18
This chair is of type six, which modifies a device already in use, so that it will become a more efficient device for eliminating fatigue. The chair shown was, ordinarily, fairly comfortable, but the legs had become worn with time. It has, as shown, been raised to that height which is most comfortable for the worker. The work-bench, in this case, could not be raised so that the work could be done either standing or sitting. The problem was to have the sitting work done with the least unnecessary fatigue possible.
The transportation devices illustrate the principle of gravity, and also the principle of constant and careful adjustment of the transportation to the worker.