Abstract :
F. E. Snell : Though continued development of the semaphore and light type of signals resulted in the production of a highly efficient unit, it yet has some serious drawbacks as pointed out by Mr. Stevens. These unfavorable conditions, attendant on wayside signals, which could not be remedied by electrical means, naturally resulted in the development of a cab signal. The cab type of signal may also offer a solution to one of the problems with which we are confronted in Cleveland, and which, no doubt, affect other operators of rapid transit lines in metropolitan areas, where a portion of the right-of-way is through the less polite residential sections. I refer to the malicious destruction of signal equipment by trespassers, particularly small boys who throw stones, using the wayside signal light lenses as targets.
