The Keeler Polygraph Model 6317 shown here was manufactured by the 'Associated Research Company' of Chicago, Illinois. This unit was developed and placed into service during the later part of 1939, at a time when the most common use for the polygraph was in the field of business for employment screening. During the Korean War, this instrument was utilized by the C.I.A, and again in the early 1960' to polygraph Cubian Nationals to determine if they were spies. This instrument was designed to simulate a piece of luggage, not only to meet F.A.A. regulations but to prevent it from being easily detected throughout the espionage community.

The 'Keeler Polygraph' Model 6317 weighed twenty pounds and was powered by four ordinary flashlight batteries. The manufacture provided an option of an AC power source at an additional charge, as shown with this instrument. This instrument utilized a community three pen cup inking system, which drew the ink from a small well located behind the pen positions. The G.S.R. component consists of a black plastic hand electrode assembly with two individual contact points. When the examinee placed the metal spring assembly over his knuckles, the circuit was complete with a slight squeeze of the hand. The single large pneumograph contained a brass bellow, which was placed over the examinees chest, while the cardio cuff was placed on the appropriate arm.

The Model 6317 was one of the first instruments in production utilizing a completely transistorized circuitry. It also boasted itself as being one of the first fully portable polygraph instruments. The Model 6317, along with its sister models developed by 'Associated Research' were in service until the early 1960's. This instrument sold for approximately $1450.00

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