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 Title: |
US4825111:
Linear motor propulsion system
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Hommes, William J.; Hockessin, DE
Keegan, Jr., John J.; Wilmington, DE
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| Assignee: |
E. I. Du Pont de Nemours and Company, Wilmington, DE
other patents from E. I. DU PONT DE NEMOURS AND COMPANY (165265) (approx. 15,067)
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| Published / Filed: |
1989-04-25
/ 1987-11-02
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| Application Number: |
US1987000115791
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| IPC Code: |
Advanced:
B60L 13/03;
B60L 15/00;
B65G 54/02;
H02K 41/02;
H02K 41/03;
H02P 25/06;
IPC-7:
B60L 13/00;
B60L 15/38;
B65G 43/10;
H02K 41/02;
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| ECLA Code: |
B60L15/00B1; H02K41/02; L60L220/14; L60L200/26; Y02T10/64B; Y02T10/64D4;
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| U.S. Class: |
Current:
310/012.15;
104/290;
104/299;
198/465.2;
198/619;
310/012.04;
310/012.11;
310/012.18;
310/012.24;
318/135;
Original:
310/012;
104/290;
104/299;
198/465.2;
198/619;
318/135;
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| Field of Search: |
104/290,292,294,295,299,301
198/465.2,619,690.1,795,803.01
310/012,112,114,DIG. 2
318/038,135,685,687,696,47
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| Priority Number: |
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| Abstract: |
A system for propelling individual carriages along an endless path from a first speed abutted in a stack in a carriage collection section, to a second speed spaced apart in an operational section, and to a third speed in a stack-forming section where the carriages return to the first speed in the stack. Novel carriages are propelled by a linear motor wherein each carriage has attached a synchronous and a hysteresis secondary. A first primary positioned adjacent one part of the path develops electromagnetic waves for engaging the synchronous secondaries to provide controlled spacing of the carriages, and a second primary adjacent another part of the path develops other electromagnetic waves for engaging the hysteresis secondaries to provide controlled abutting of the carriages.
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| Primary / Asst. Examiners: |
Wong, Peter S.; Rebsch, D. L.
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Family: |
Show 18 known family members
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First Claim:
Show all 57 claims |
We claim:
1. A method of controlling the propulsion of carriages traveling along an endless path including the steps of:
- forming a stack of carriages;
- controlling the movement of carriages in the stack in a carriage collection section, such collection section having an entrance and exit;
- propelling the carriages in the collection section at a first constant speed;
- propelling the carriages one by one from the exit of the collection section and into an operational section, and propelling the carriages through the operational section from the first speed to a second speed greater than the first speed whereby such carriages are spaced apart; and
- propelling the spaced apart carriages into and through a stack forming section wherein such carriages are propelled from the second speed to a third speed prior to reaching the trailing carriage in the stack of carriages traveling at the first speed before such carriages reach the entrance of the collection section; and
- wherein the third speed acts to propel the carriages into controlled abutment with the trailing carriage in the stack.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 59 U.S. patent(s) that reference this one
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