French reference #331,244 (no date) drawings only. |
The Incredible Scream Machine: A History of the Roller Coaster, by Robert Cartmell; Amusement Park Books, Inc. Bowling Green, Ohio (1987)--pp. 202-213 ("How Roller Coasters Work"). |
Brushless DC Motors: Electronic Commutation and Control by Thomas J. Sokira and Wolfgang Jaffe; Tab Books, Inc. Blue Ridge Summit, PA (1990)--Preface and Chapter 7 ("Applications and uses of BLDC Motors", pp. 218-225 and Chapter 9 (pp. 253-257). |
US Safety Trolley Corp. Brochure and Drawing on "Power Rail Modem" which were furnished to applicants on request on Jul. 23, 1992. |
"ICs Provide Control For Sensorless DC Motors," by Dave Peters and Jeff Harth, EDN Apr. 29, 1993, pp. 85-94. |
Radio Engineering Handbook, Keith Henney, Editor-In-Chief, Fifth Edition (1959), pp. 19-105. |