Collective protectors

For use in the field, a collective protector should be portable on muiur transportation and should be furnished in at least two sizes—one purifying sufficiont air for small gasproof shelters in the fonvard part of the combat area, and one purifying sufficient air for larger shelters in the rear ureas of the combat zone. 

In the area of collective protection, more thought must be given to making fallout shelters impervious to chemical and biological agents. This can be done by use of a collective protector, or possibly by means of a fiber diffusion board now under development. 

It is our plan, however, in keeping with our policy of assisting all persons in getting all the protection they can afford, to develop fixed BW-CW protection for our home shelter designs when the necessary collective protector becomes available. We would still recommend that the occupants have masks also, for mobility. 

For collective protection, the CWS concentrated on improving the bulky Ml Collective Protector for field use. A somewhat lighter version, the M2, was standardized in 1942. It provided the same amount of air but weighed just over 600 lb. A still-lighter version, the M3, was also standardized the same year. It weighed only 225 lb and provided 50 cu ft of air per minute.77... 

Other mask work included the first tank mask, the M14, standardized in 1954 as part of the M8 3-Man Tank Collective Protector. In 1959, the corps standardized an improved head-wound mask, designated the M18, that allowed soldiers with head wounds to wear protective masks in contaminated environments.3... 

US Army Materiel Command. Classification of Collective Protection Equipment, Guided Missile Van, NIKE-HER-CULES, Trailer-Mounted, Ml (E1R1) as a Standard-B Type Component of the Related Air Conditioner-Collective Protector (AC-CP). Washington, DC AMC 23 Dec 1963. Memorandum. 

At the request of the Office of Civilian Defense late in 1941, the CWS-MIT Development Laboratory devised a collective protector for civilian air raid shelters. Under power operation it would protect adequately 40 to 50 persons when hand-operated, 20 to 25 people. The service constructed a... 

CWTC Item 132, Standardization of Large Field Collective Protector, 12 Mar 40. 

CWTC Item 1242, Military Requirement and Military Characteristics for a Collective Protector for Tanks, 11 Jan 45. 

Japanese collective protectors were similar to those used by European nations and the United States. An ingenious model capable of purifying air for forty persons derived the power for pumping the bellows from a geared bicycle mechanism. ... 

The service assembled 114 maintenance repair sets for chemical equipment at Edgewood Arsenal between August 1942 and July 1945. These sets consisted essentially of special tools needed for hand-tool repair of flame throwers, collective protectors, air compressors, and portable decontaminating apparatus, as well as gas mask repair tools and test equipment. No single item of field equipment supplied by the CWS proved more useful to the chemical officer in the field than did this set. 

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