Tensioning devices which may, for example, be used in fencing systems are disclosed. In one form, a system includes a pair of linking members each of which may be tensioned to transition from a flexible or somewhat flexible configuration to a more rigid configuration. The system further includes a tensioning device including a first engaging member configured to engage with a linking member, a second engaging member configured to engage with another linking member, and an adjustment member cooperating with and structured to selectively control relative positioning of the first and second engaging members. Each of the linking members may be engaged with a respective one of a pair elongate members spaced from one another, or with a first one and a second one of the elongate members. When so engaged, the tensioning device may be engaged with and tension the linking members to provide bracing between the elongate members.

A robotically controlled system including a fence enclosure that can move and/or shape-shift itself autonomously and automatically without manual intervention. The system includes coils of electric fence wire that are spring-loaded or otherwise tensioned so that the length of electric fence wire between each post robot is able to contract or expand as the system of robots adapts to optimize the shape of the fence enclosure as the entire enclosure is moved by the robots around a field or other grazing pasture on an area of land.

A robotically controlled system including a fence enclosure that can move and/or shape-shift itself autonomously and automatically without manual intervention. The system includes coils of electric fence wire that are spring-loaded or otherwise tensioned so that the length of electric fence wire between each post robot is able to contract or expand as the system of robots adapts to optimize the shape of the fence enclosure as the entire enclosure is moved by the robots around a field or other grazing pasture on an area of land.

A line strainer for use in an electric fence system is described. The line strainer includes a unitary body made of electrically non-conductive material, having two opposing arms, a spool mounting element for rotatably mounting an electrically conductive spool having at least one toothed flange between the arms of the body, wherein the spool is configured to have a first line secured to it. The line strainer further includes a line bearing support member about which a second line is to be passed and tensioned. A releasable pawl is attached to the unitary body and configured to engage with the at least one toothed flange to restrict rotation of the spool in one direction when the spool is rotatably mounted to the spool mounting element.

A robotically controlled system including a fence enclosure that can move and/or shape-shift itself autonomously and automatically without manual intervention. The system includes coils of electric fence wire that are spring-loaded or otherwise tensioned so that the length of electric fence wire between each post robot is able to contract or expand as the system of robots adapts to optimize the shape of the fence enclosure as the entire enclosure is moved by the robots around a field or other grazing pasture on an area of land.

A strainer for straining a length of material, the strainer including a tensioning device configured to tension a length of material between the strainer and an object, characterised in that the strainer includes a conductive component configured to contact the length of the material when held by the tensioning device, and wherein the conductive component includes an attachment portion for an external conductive link to the strainer. This invention also relates to a security system and its method of preparation using the strainer as described herein.

A line strainer for use in an electric fence system is described. The line strainer includes a unitary body made of electrically non-conductive material, having two opposing arms, a spool mounting element for rotatably mounting an electrically conductive spool having at least one toothed flange between the arms of the body, wherein the spool is configured to have a first line secured to it. The line strainer further includes a line bearing support member about which a second line is to be passed and tensioned. A releasable pawl is attached to the unitary body and configured to engage with the at least one toothed flange to restrict rotation of the spool in one direction when the spool is rotatably mounted to the spool mounting element.

A robotically controlled system including a fence enclosure that can move and/or shape-shift itself autonomously and automatically without manual intervention. The system includes coils of electric fence wire that are spring-loaded or otherwise tensioned so that the length of electric fence wire between each post robot is able to contract or expand as the system of robots adapts to optimize the shape of the fence enclosure as the entire enclosure is moved by the robots around a field or other grazing pasture on an area of land.

A strainer for straining a length of material, the strainer including a tensioning device configured to tension a length of material between the strainer and an object, characterised in that the strainer includes a conductive component configured to contact the length of the material when held by the tensioning device, and wherein the conductive component includes an attachment portion for an external conductive link to the strainer. This invention also relates to a security system and its method of preparation using the strainer as described herein.

A strainer for straining a length of material, the strainer including a tensioning device configured to tension a length of material between the strainer and an object, characterized in that the strainer includes a conductive component configured to contact the length of the material when held by the tensioning device, and wherein the conductive component includes an attachment portion for an external conductive link to the strainer. This invention also relates to a security system and its method of preparation using the strainer as described herein.