Abstract: An item loss prevention system for protecting from the loss of items from a user, and more specifically to an electronic device utilizing a wireless connection between a remote unit attached to an item, such as a set of one or more keys, and a host or belt unit attached to the user, to prevent the loss of the item. The system includes magnetic sensors between the item and the belt, which are Hall type magnetic sensors, coupled with an accelerometer. With the additional input from the accelerometer, an alarm activates when the item, such as a key, is separated at a distance from the belt or host unit. Additionally, the key unit can attach to an unpairing station to re-set the remote unite for re-pairing to another host unit.

Abstract: An item loss prevention system for protecting from the loss of items from a user, and more specifically to an electronic device utilizing a wireless connection between a remote unit attached to an item, such as a set of one or more keys, and a host or belt unit attached to the user, to prevent the loss of the item. The system includes magnetic sensors between the item and the belt, which are Hall type magnetic sensors. An alarm activates when the item attached to the remote unit, such as a key is separated from the host unit. A multiple of additional host units and the remote units pairs can operate properly in proximity to each other, and are tuned to respond to rolling average signal strength monitoring, to indicate a separation distance requiring an alarm to the user.

Abstract: An item loss prevention system for protecting from the loss of items from a user, and more specifically to an electronic device utilizing a wireless connection between a remote unit attached to an item, such as a set of one or more keys, and a host or belt unit attached to the user, to prevent the loss of the item. The system includes magnetic sensors between the item and the belt, which are Hall type magnetic sensors. An alarm activates when the item attached to the remote unit, such as a key is separated from the host unit. A multiple of additional host units and the remote units pairs can operate properly in proximity to each other, and are tuned to respond to rolling average signal strength monitoring, to indicate a separation distance requiring an alarm to the user.

Abstract: A handheld materials testing device is provided for measuring compressive properties of a material, preferably articular cartilage in vivo. The device is computer-controlled and provides a readout indicative of the desired compressive property, which in the case of bodily tissue, may be indicative of the state of health of the tissue. The device does not require precise perpendicular alignment and is preferably capable of compensating for force applied by the user against the tissue.