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 Title: |
US5604593:
Interferometer position measurement system with extensible legs
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
McMurtry, David R.; Wotton-Under-Edge, United Kingdom
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| Assignee: |
Renishaw plc, Gloucestershire, United Kingdom
other patents from RENISHAW PLC (470890) (approx. 179)
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| Published / Filed: |
1997-02-18
/ 1995-06-27
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| Application Number: |
US1995000464835
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| IPC Code: |
Advanced:
G01B 11/00;
G09B 9/14;
Core:
G09B 9/02;
more...
IPC-7:
G01B 9/02;
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| ECLA Code: |
G01B11/00D1; G09B9/14;
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| U.S. Class: |
Current:
356/496;
248/371;
409/178;
409/179;
409/235;
Original:
356/358;
409/235;
409/178;
409/179;
248/371;
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| Field of Search: |
356/345,358
409/235,201,178,179
408/234,129
248/371,398
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| Priority Number: |
| 1993-11-25 |
GB1993000024218 |
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| Abstract: |
PCT No. PCT/GB94/02593 Sec. 371 Date Jun. 27, 1995 Sec. 102(e) Date Jun. 27, 1995 PCT Filed Nov. 25, 1994 PCT Pub. No. WO95/14905 PCT Pub. Date Jun. 1, 1995A hexapod machine comprises a fixed structure (10,11) and a movable structure (14,15). Six extensible legs (18) are connected between the fixed and movable structures, and their lengths determine the relative position and orientation of the structures. The lengths of the legs are measured by respective laser interferometers (60,62). To increase the accuracy of the measurement, a retroreflector (62) of the interferometer is directly mounted to and fast with one of the structures (14,15).
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| Attorney, Agent or Firm: |
Oliff & Berridge ;
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| Primary / Asst. Examiners: |
Epps, Georgia Y.; Kim, Robert
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| Maintenance Status: |
E2 Expired Check current status
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Designated Country: |
DE GB EP JP US
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| Family: |
Show 7 known family members
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First Claim:
Show all 13 claims |
What is claimed is:
1. A machine comprising:
- two support structures which are movable in three dimensions relative to each other;
- a plurality of extensible legs connected between the support structures, a position and an orientation in said three dimensions of one support structure relative to the other being defined by the relative lengths of the extensible legs;
- a plurality of interferometers acting between the support structures, each comprising a light emitting unit associated with one support structure and a reflector associated with the other support structure, wherein the reflector is rigidly mounted on its associated support structure.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
Show description
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| PCT Number: |
PCT/GB94/02593
WO9514905
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| PCT Pub./Filed Dates: |
1995-06-01 / 1994-11-25
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| § 371 / 102(e) Dates: |
1995-06-27 / 1995-06-27
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| Forward References: |
Show 16 U.S. patent(s) that reference this one
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