Symptomatology of Vietnam veterans with post-traumatic stress disorder

An overvoltage protection apparatus is described including an improved housing containing the overvoltage protection device and a separate holder member within which such device is secured. The housing includes a cover member and base member of a tapered shape so that the cover member is freed from such base member after it slides along a guide slot only about one-third the length of such base member. A concealed tamper-proof lock means is provided on the top portion of the cover and base member, including a notch and a cooperating lock projection which lock the cover in its closed position. The holder member is a hollow box of transparent plastic insulating material for holding the overvoltage protection device to enable it to be easily inserted into and removed out of engagement with electrical contacts on the base member while reducing the danger of electrical shock.