R. E. GAREIS VEHICLE LOCATING SYSTEM

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP81-00120R000100010011-4
• Release Decision: RIFPUB
• Original Classification: K
• Document Page Count: 12
• Document Creation Date: December 22, 2016
• Document Release Date: December 8, 2003
• Sequence Number: 11
• Content Type: CONT

Approved For Release 2009/04/10 :CIA-RDP81-001208000100010011-4 ~-~
Feb. 4. 19fi~ _.
INVENTOR
R4HALD E.6r+REIS
Approved For Release 2009/04/10 :CIA-RDP81-001208000100010011-4
.~. C. ~An~is , 3,42,349
 Filed April 4, I867 ..
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2009/04/10 :CIA-RDP81-001208000100010011-4 '-~~ --
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_ VEHICLE LOCATING SYSTEbt __-. _
Sheet 2 oI 3
Approved For Release 2009/04/10 :CIA-RDP81-001208000100010011-4
 Approved For Release 2009/04/10: CIA-RDP81-001208000100010011-4
VEHICLE LOCATING SYSTEM
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Approved For Release 2009/04/10: CIA-RDP81-001208000100010011-4
 Approved For Release 2009/04/10 :CIA-RDP81-001208000100010011-4 . 4, 1969
3,426,349
V>;liICLE LQCA37NG SYSTEIY
Ronald E. Gareis, Roanoke, Va., assignor to General
Electric Company, a corporWtion of New York
Filed Apr. 4, 1969, Scr, No. 628,443
U.S. Ci, 343-6.5 _ 1 Claini
Int. CI, GOls 9/S6 - - -
ABS'T'RACT OF THE I)iSCL05U12E
.?r, series of passive responders spaced along a path
traveled by a vehicle are excited by a single frequency
signal radiated by a transmitter carried on the vehicle.
Each responder produces a different RF frequency signal
in response to this excitation and rndiates it to a wide-
band receiver carried on the vehicle. A number of band-
pass filter circuits are connected to the receiver to detect
incoming signals having frequencies corresponding to fre-
quencies generated at fixed locations on the vehicte path.
The magnihrdc of a frequency being detected is indicative
ol; the location of the vehicle.
Background of 11ie irtverrtion
fn the fields of transporting both people and materials
it is often necessary that the precise location of a vehicle
ice: known in order to effectuate certain control opcra-
tior,.c, such as acceleration or deceleration of the vehicle.
A ver.icie locating system must be bosh reliable and in-
expensive and yet capable of functioning under adverse
conditions. The present. invention meets each of these
criteria.
Sumrnary of tTre invention
The present invention comprises a vehicte control sys-
tem including a series of passive re~onders which are
spaced from ant another along a park traveled by a
vehicle. The passive responders are excitecL.-by-the- single
fregnenc_y_ra