1. A termite indicating device for indicating the presence of termites in a structure, including:
a termite bait element that includes material which is typically eaten by termites, the bait element being capable of being inserted into a wall having a wall frame from one side of the wall, such that when inserted the bait element is accessible to termites moving around on the wall frame, and such that the bait element can be manually withdrawn in a reverse direction by a person on said one side of the wall to inspect the bait element for evidence of termite activity.
2. A termite indicating device according to claim 1, wherein the material is a material that is preferentially eaten by termites in preference to other materials.
3. A termite indicating device according to claim 2, wherein the bait element is made of one or more of mountain, ash, cork or cellulose.
4. A termite indicating device according to claim 1, wherein the wall includes an internal wall sheeting and a said wall frame and the termite bait element comprises a plug which is snugly received within a hole in the wall sheeting and a timber probe comprising said material preferentially eaten by termites which is located in said wall frame in a position where it is accessible to termites.
5. A termite indicating device according to claim 4, wherein said wall frame comprises a plurality of studs and plates, and wherein the probe is positioned resting on a bottom plate of said frame.
6. A termite indicating device according to claim 4 or claim 5, wherein the termite bait element includes a flexible element intermediate the probe and the plug for permitting the probe to rest at a different height to the plug in the wall.
7. A termite indicating device according to claim 6, wherein the flexible element is a short rubber or plastic cord.
8. A termite indicating device according to claim 6 or claim 7, wherein the termite bait element also includes centering means for positioning means for the probe broadly centrally with respect to the hole in the wall when it is drawn in a reverse direction through the hole in the wall.
9. A termite indicating device according to claim 8, wherein the centering means comprises a coupler having one end attached to the timber probe and an opposed end attached to the flexible element.
10. A termite indicating device according to claim 9, wherein said opposed end is rounded to guide it into the hole.
11. A termite indicating device according to any one of claims 1 to 10, including a collar which is permanently mounted in the wall defining the hole in the wall element and the plug is snugly received in the collar when the device is mounted in position in a wall.
12. A termite indicating device according to claim 11, wherein the plug is sized to be snugly received within the collar with a small amount of clearance.
13. A termite indicating device according to claim 11 or claim 12, wherein the plug defines an internal screw thread formation and the plug defines a complementary screw thread formation, whereby said one and complementary screw thread formations engage when the device is mounted in a wall.
14. A termite indicating device according to any one of claims 11 to 13, wherein the plug has an end face that defines a formation for receiving the end of a rotating device thereby to facilitate insertion and removal of the plug.
15. A termite indicating device according to any one of claims 1 to 14, wherein the probe further includes an active ingredient that is toxic to termites coated on the surface of the probe.
16. A method of monitoring a structure having walls and a timber frame for signs of termite infestation, the method including:
placing a termite indicator device including at least one termite bait element which includes material which is typically eaten by termites inside the structure in proximity to the timber frame; and
periodically inspecting theeach termite bait element for evidence of termite infestation.
17. A method according to claim 16, wherein the bait element is made of a material that is preferred by termites to other materials namely mountain ash, radiator pine or hoop pine.
18. A method according to claim 16 or claim 17, wherein a plurality of bait elements are positioned at spaced intervals around the walls of the structure.
19. A method according to any one of claims 16 to 18, wherein the timber frame comprises studs and plates and the bait elements are positioned resting on the bottom plates of the structure around the periphery of the structure.
20. A method according to claim 19, wherein the bait elements are positioned at least every 5 metres along the external wall of the structure.
21. A method according to any one of claims 16 to 20, wherein the bait elements are inspected at least every 6 months.
22. A method according to any one of claims 16 to 21, wherein each bait element comprises a plug and a timber probe connected by a flexible element and the plug is removably mounted to the internal wall panel of a wall and the timber probe is received within the wall frame.
23. A method according to claim 22, wherein the plug is removably mounted to the internal wall panel by complementary screw thread formations and the device includes a centering means for aligning the probe with the hole to enable it to be withdrawn in a reverse direction through the hole.
24. A wall comprising:
a timber frame providing structural support for the wall comprising a plurality of timber members and having two sides;
a wall lining on one side of said frame spaced away from said frame;
a further wall lining on the other side of said frame spaced away from said frame, wherein said further wall lining also defines a hole through which an element can be removably inserted; and
a termite bait element including material that is typically eaten by termites that is removably inserted into said hole such that it is positioned resting on a member of the frame where it is accessible to termites moving around on the wall frame, and the termite bait element also being capable of being withdrawn through the hole in a reverse direction to inspect the element for evidence of termite activity.
25. A wall according to claim 24, wherein the frame comprises upper and lower horizontally extending plates interconnected at their ends by vertically extending studs, and the bait element rests on the lower plate.
26. A wall according to claim 25, wherein the termite bait element comprises a plug that is snugly received within the hole, a probe comprising a material that is eaten by termites, and a flexible element intermediate the probe and plug for permitting the probe to drop down onto the plate when it is passed through the hole, and the flexible element enables the probe to be pulled in a reverse direction back through the hole when the plug is taken out of the hole.
27. A structure according to claim 26, wherein said one wall lining is a brick veneer and said further wall lining is an internal wall lining made of plasterboard or like material, and wherein the wall has a plurality of said termite indicator devices at spaced intervals along the length of the wall.
28. A structure comprising a plurality of walls as defined in claim 24.
29. A structure according to claim 28 which is a house mounted on a concrete slab.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A flywheel having as components a drive transfer element and a rim, the drive transfer element being coupled to the rim by a winding around each, wherein an indicator ring is mounted to the flywheel for rotation therewith, the indicator ring being formed so as to behave differently under rotation than a flywheel component.
2. A flywheel as claimed in claim 1 in which the indicator ring is mounted to the flywheel by an interference fit.
3. A flywheel as claimed in claim 1 or 2 in which the rim comprises a mass element and a circumferential support element at least partially disposed radially outside the mass element.
4. A flywheel as claimed in any preceding claim in which the indicator ring and flywheel component are arranged to deform differently under rotation.
5. The flywheel of claim 3 wherein the ring is supported by the support element.
6. The flywheel of claim 5 wherein the ring is mounted substantially radially outside the support element.
7. The flywheel of claim 6 wherein the ring has a stiffness less than or substantially equal to that of the support element to deform differently under rotation.
8. The flywheel of claim 2 wherein the ring is mounted substantially radially inside the support element.
9. The flywheel of claim 8 wherein the ring has a stiffness greater than or substantially equal to that of the support element to deform differently under rotation.
10. The flywheel of claim 1 wherein the drive transfer element comprises a shaft and the ring is mounted on the shaft.
11. The flywheel of any preceding claim wherein the support element comprises circumferentially wound fibre, and preferably the circumferentially wound fibre is carbon.
12. The flywheel of claim 3 in which the interference fit results in a predetermined pre-load between the ring and its mounting when the flywheel is at rest.
13. The flywheel of any preceding claim in which the interference fit has a non-uniform stress distribution at the interference boundary.
14. The flywheel of claim 11 wherein the flywheel is balanced as an assembly.
15. The flywheel of any preceding claim further comprising a detector for detecting differential behaviour of the ring and flywheel under rotation.
16. The flywheel of claim 15 in which the detector is arranged to detect an imbalance caused by said differential behaviour.
17. A method of constructing a flywheel comprising the steps of providing a winding around a drive transfer element and a rim and mounting an indicator ring to the flywheel for rotation therewith.
18. A method as claimed in claim 17 in which the indicator ring is mounted using an interference fit.
19. The method of claim 17 wherein the rim comprises a mass element and a circumferential support element at least partially radially disposed outside the mass element and the ring is mounted to the support member.
20. The method of claim 19 wherein the ring is mounted substantially radially outside the support element.
21. The method of claim 19 wherein the ring is mounted substantially radially inside of the support element.
22. The method of claims 17 to 21 wherein the ring is pressed onto or into the flywheel such that a pre-load results between the ring and its mounting having non-uniform stress distribution results at the interference boundary.
23. The method of claim 22 wherein the flywheel is balanced on assembly.
24. The method of claims 17 to 23 wherein the mass element is ductile and wherein both the winding and the support element are pre-loaded by rotating the flywheel in a pre-loading such that centrifugal forces acting on the mass element cause it to yield outwardly.
25. The method of claim 24 wherein in the pre-loading step the flywheel is rotated at a speed greater than normal operating rotational speeds and lower than a speed which would cause the pre-load between the ring and its mounting to be overcome.
26. A method of operating a flywheel as claimed in any of claims 1 to 16 andor fabricated or claimed in any of claims 17 to 25 comprising rotating the flywheel and monitoring for an imbalance in the flywheel to indicate overload.
27. A flywheel or method substantially as described herein with reference to the drawings.