Device for dimensionally characterizing elongate components

• US 5,112,566 A
• Filed: 04/12/1989
• Issued: 05/12/1992
• Est. Priority Date: 04/12/1989
• Status: Expired due to Fees

• Current Assignee: General Electric Company
• Original Assignee: General Electric Company
• Inventors: Salvo, Edgar E. Jr., Tunnell, George W., Meeka, Edward W., Butzin, Donald F.
• Primary Examiner(s): Hunt, Brooks H.
• Assistant Examiner(s): CHELLIAH, MEENA A
• Application Number:
  US07/336,999
• Time in Patent Office: 1,126 Days
• Field of Search: 376/245, 376/258, 376/259, 376/249, 376/248, 33/174, 73/866.5
• US Class Current: 376/245
• CPC Class Codes: G01B 5/0002 Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
• CPC Class Codes: G21C 17/07 Leak testing
• CPC Class Codes: Y02E 30/30 Nuclear fission reactors

Abstract

Disclosed is a device for measuring dimensional characteristics of an elongate component which comprises:

(a) an elongate rigid support that bears (i) an upper platform upon which is mounted a drive; (ii) a clamp mechanism for securing said component about its proximal end in a reference position; (iii) a lower platform which supports a pedestal for securing said component about its distal end in a reference position; and

(b) a sensor carriage movably mounted to said rigid support and operatively connected to said drive for movement along the elongate extent of said support and having an opening penetrating therethrough for receiving said elongate component when it is secured by and substantially parallel to said rigid support, said carrier bearing a plurality of pivotally-mounted bell cranks spaced about said opening, each bell crank having a wheel for riding on said component during movement of the carrier and being in contact with a sensor capable of providing a signal correlative to displacement of the bell crank during movement of the carrier along the elongate component.

Claims

1. A movable carriage for use in a device for measuring dimensional characteristics of an elongate component, said device including a rigid support which is adapted to bear said movable carriage and to retain said component in a predetermined fixed orientation, which comprises:

a sensor carrier movably mounted to said rigid support and having an opening penetrating therethrough for receiving said elongate component, said carrier bearing a plurality of pivotally-mounted bell cranks spaced about said opening, each said bell crank having a wheel for riding on said component during movement of the carrier and being in contact with a sensor capable of providing a signal correlative to displacement of said bell crank during movement of the carrier along the elongate component.

2. The movable carriage of claim 1 wherein said rigid support bears rails and said carriage has wheels that ride upon said rails.

3. The movable carriage of claim 1 wherein said device has a motor connected to a drive chain that engages said carriage for its movement.

4. The movable carriage of claim 1 wherein said bell cranks retract from contact with said component.

5. The movable carriage of claim 4 wherein an air cylinder assembly is connected to a reset bar which reset bar is actuable for pivoting said bell cranks for their retraction.

6. The movable carriage of claim 1 wherein said sensors comprise linear variable differential transformers that are mounted vertically and substantially parallel with said elongate component to be dimensionally characterized.

7. The movable carriage of claim 6 wherein said linear variable differential transformer sensors are in contact with biasing means to cause the wheels of said bell cranks to press against said component when said component is retained by said device for its dimensional characterization.

8. A device for measuring dimensional characteristics of an elongate component which comprises:

(a) an elongate rigid support that bears (i) an upper platform upon which is mounted a drive;

(ii) a clamp mechanism for securing said component about its proximal end in a reference position;

(iii) a lower platform which supports a pedestal for securing said component about its distal end in a reference position; and

(b) a sensor carriage movably mounted to said rigid support and operatively connected to said drive for movement along the elongate extent of said support and having an opening penetrating therethrough for receiving said elongate component when it is secured by and substantially parallel to said rigid support, said carrier bearing a plurality of pivotally-mounted bell cranks spaced about said opening, each bell crank having a wheel for riding on said component during movement of the carrier and being in contact with a sensor capable of providing a signal correlative to displacement of the bell crank during movement of the carrier along the elongate component.

9. The device of claim 8 wherein said drive is an electric motor operatively connected to said carriage by a chain.

10. The device of claim 8 wherein a grapple assembly, which includes a grapple body connected to an alignment sleeve connected to a grapple shaft, is attached to said component for moving said component into a position for said device to secure it, said device clamp mechanism securing said alignment sleeve of said grapple assembly.

11. The device of claim 10 wherein said grapple shaft extends to a position adjacent said upper platform where a retainer bar secures said grapple shaft thereto.

12. The device of claim 10 wherein an actuator shaft is housed within said alignment sleeve and said grapple shaft, said component has a flange at its proximal end, and said actuator shaft has a flange about its end which is inserted into said grapple body, said grapple body retaining dogs that engage said actuator shaft flange for securing said actuator shaft, an opening being formed between said grapple body and said dogs for insertion of said component flange whereby said grapple assembly secures said component.

13. The device of claim 10 wherein said component is hollow about its proximal end and said grapple body retains a plurality of spring biased bearing block assemblies located below said dogs and which press against the inside walls of said component to place it in a reference position about its proximal end.

14. The device of claim 10 wherein said component is hollow at its distal end and said pedestal retains a plurality of spring biased bearing block assemblies which press against the inside walls of said component to place it in a reference position about its distal end.

15. The device of claim 13 wherein said component is hollow at its distal end and said pedestal retains a plurality of spring biased bearing block assemblies which press against the inside walls of said component to place it in a reference position about its distal end.

16. The device of claim 8 wherein said carriage bears a sensor switch and said rigid support bears a home switch above said lower platform and located such that said carriage sensor switch engages said rigid support home switch when said carriage is moved to a position above said lower platform and to a position wherein said pedestal penetrates through the hole in said carriage.

17. The device of claim 16 wherein said pedestal has a sensor standard location for calibrating said sensors on said carriage.

18. The device of claim 17 wherein said rigid support bears rails and said carriage has wheels that ride upon said rails.

19. The device of claim 18 wherein said bell cranks retract from contact with said component.

20. The device of claim 19 wherein an air cylinder assembly is connected to a reset bar which reset bar is actuable for pivoting said bell cranks for their retraction.

21. The device of claim 20 wherein said sensors comprise linear variable differential transformers that are mounted vertically and substantially parallel with said elongate component to be dimensionally characterized.

22. The device of claim 21 wherein said linear variable differential transformer sensors are in contact with biasing means to cause the wheels of said bell cranks to press against said component when said component is retained by said device for its dimensional characterization.

23. The device of claim 8 adpated for use when submerged under water in a curbed pool wherein said upper platform retains clamps that clamp said device onto the curb of said pool and said lower assembly has a support that presses against the pool wall for vertically orienting said device.