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vhere lioles are present in the cabinet to provide nternal ventilation. (Good ventilation is essential beause of the great amount of heat generated by the ubes and other components inside the television set. ) Vhile the sides, back, and top of most cabinets have snally been properly safeguarded, it often happens hat rather large areas in the base are open and overcd only by a relatively thin screen-like material, f this screen is removed or becomes torn or bent, it i possible that the prying fingers of a child may be blc to touch many parts of the set at which voltages xist that are far more than sufficient to cause death. Jaturally, a set should never be used in any place or Dr any reason with the protective back cover re
moved.
The Underwriters' Laboratories allow 15 milliamperes (total) leakage from parts that are partially protected, on the theory that the hand or fingers are not likely at any time to make good or finn contact with them. Nevertheless, in view of the lively imagination of young children and their constant searching for new contacts with the external world, Consiuners' Research does not believe there should be a distinction made between easily accessible parts and parts that are partially protected, in respect to amount of leakage current to be i>ermitted.
It is surprising what characteristics of its design affect the safety of a television set, particularly where
This set designed for classroom use will receive both "over the air" and closed circuit TV programs. The all-wood and masonitc cabinet has a tampcr-proof bark as shown in the inset of the photo below.
Photos courtesy Motorola, Inc.
Ill cATioNAL Screen and Audiovisual Guide — May, 1961
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