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Title: US3974778: Speed control system
[ Derwent Title ]

Country: US United States of America

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24 pages

Inventor: Black, Millard G.; Santa Ana, CA
Sheldon, Warren D.; Glendora, CA
Cook, Dennis S.; Orange, CA

Assignee: Walt Disney Productions, Burbank, CA
other patents from WALT DISNEY PRODUCTIONS (617670) (approx. 22)
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Published / Filed: 1976-08-17 / 1974-08-12

Application Number: US1974000496389

IPC Code: Advanced: B60L 15/00; B61B 13/12;
IPC-7: B61B 13/12;

ECLA Code: B60L15/00B1; B61B13/12; L60L200/26; Y02T30/30;

U.S. Class: Current: 104/292; 104/299; 246/182.C;
Original: 104/148.LM; 246/182.C;

Field of Search: 104/148 LM,148 MS,152,147 R,147 A 246/187 R,186,187 B,249,182 R,182 C,74,63 A 324/161

Priority Number:
1974-08-12  US1974000496389

Abstract:     A speed control system for controlling the speed of a vehicle traveling on a guideway comprising, in combination, a plurality of linear motor windings disposed along the guideway, a corresponding secondary mounted on the vehicle for inductively interacting with the proximate ones of said windings, sensing means disposed adjacent said windings for sensing the proximity of said secondary and for gating an alternating electrical signal to said adjacent winding, measuring means disposed adjacent said sensing means for measuring the rate of progression of said vehicle along said guideway, error detection means connected to said measuring means for producing an error signal in equal integer increments corresponding to the deviation of the vehicle rate from a preselected rate and commutation means connected to receive said error signal for commutating said alternating electrical signal to said adjacent winding in equal increments of power corresponding to said error signal.

Attorney, Agent or Firm: Fulwider, Patton, Rieber, Lee & Utecht ;

Primary / Asst. Examiners: Kunin, Stephen G.; Eisenzopf, Reinhard J.

Family: None

First Claim:
Show all 15 claims
What is claimed is:     1. A vehicle propulsion system comprising:
  • a guideway;
  • an excitation source producing an alternating electrical signal;
  • a vehicle disposed for rolling along said guideway;
  • a secondary mounted on the underside of said vehicle;
  • a plurality of primary winding segments disposed in said guideway;
  • speed trap means to determine the speed of said vehicle and generate a digital velocity signal therefrom;
  • comparison means to compare said velocity signal to a reference signal and determine the deviation of the speed of said vehicle from a preselected speed;
  • a plurality of control means each disposed in associated relationship with a corresponding one of said winding segments and operatively connected to commutate said alternating electrical signal to said winding segments in commutation increments proportional in power to said deviation of the speed of said vehicle from a preselected speed; and
  • a plurality of proximity means disposed in associated relationship with corresponding ones of said control means for completing the connection between said corresponding ones of said winding segments and said control means when said vehicle is located on said guideway in inductive relationship between said secondary and said one winding segment and for concurrently disabling selected other ones of said control means.

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Description: Show description

Forward References: Show 22 U.S. patent(s) that reference this one

U.S. References: Go to Result Set: All U.S. references   |  Forward references (22)   |   Backward references (3)   |   Citation Link

Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 5pp US3639753  1972-01 Reich  General Signal Corporation SYSTEM FOR GOVERNING THE SPEED OF RAILWAY VEHICLES
Get PDF - 15pp US3792665  1974-02 Nelson  LTV Aerospace Corporation LINEAR INDUCTION CONTROL SYSTEM
Foreign References: None

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