Embodiments, alternatives and variations of a device with a assisted opening and closing mechanism for the opening and closing of at least one shaft. Finger rings and other items is configured with components to conveniently, easily and quickly open and close at least one shaft with at least one tensioning mechanism. Other uses of said devices comprise use as a knife, as a tool, a way of relaxation, for therapeutic use, for educational use, as a toy, for self defence, and for entertainment purposes.

An example safety device includes a storage member, a membrane disposed within the chamber, a material disposed within the membrane, and an actuator moveably attached to the membrane. The storage member has a main body that defines a first opening, a chamber, and a windowed portion. Each of the first opening and the windowed portion provides access between the chamber and an environment exterior to the chamber. The membrane has a first configuration and a second configuration. The material is contained within the membrane when the membrane is in the first configuration and is in fluid communication with the environment exterior to the membrane when the membrane is in the second configuration. The actuator is moveable between a first position and a second position such that movement of the actuator results in movement of the membrane from the first configuration to the second configuration.

Systems and methods for controlling a firearm. Components embedded in a portion of the firearm enable the firearm to determine if a user of the firearm is authorized to do so, and either enable or disable a firing mechanism of the firearm accordingly. The firearm may also send communication signals regarding the status of the firearm or events detected by the firearm to a remote device controlled by an authorized user. The system may thereby notify the authorized user of attempted unauthorized use of the firearm, that the firearm has been left behind by the authorized user, or that the firearm is being tampered with. The system may also include multi-tag or a voice-override features that prevent the firearm from being used against the authorized user should the authorized user lose control of the firearm.

Systems and methods for controlling a firearm. Components embedded in a portion of the firearm enable the firearm to determine if a user of the firearm is authorized to do so, and either enable or disable a firing mechanism of the firearm accordingly. The firearm may also send communication signals regarding the status of the firearm or events detected by the firearm to a remote device controlled by an authorized user. The system may thereby notify the authorized user of attempted unauthorized use of the firearm, that the firearm has been left behind by the authorized user, or that the firearm is being tampered with. The system may also include multi-tag or a voice-override features that prevent the firearm from being used against the authorized user should the authorized user lose control of the firearm.

An exercise device having a bar with a first handle, a grip exerciser having a second handle connected to the bar via a resistance member proximate the first handle and moveable between a first position and a second position by a hand of a user; and an auxiliary device connected to the bar selected from a light assembly, a sound generator, an electrified defensive unit, a pressurized defensive unit, and combinations of the same.

An alert and response helmet system for temporarily disabling in a non-lethal manner in order to take a wanted individual into custody without placing the life of an officer in danger, the alert and response helmet system including; a pair of glasses to be worn by the officer; the glasses including a camera which photographs an individual and obtains facial and or an iris scan of the individual. The glasses further including an earphone and a communication device which communicates with the officer. A processor processes the camera image and a database provides information relating to whether the processed images correspond to a wanted individual. A helmet worn by the officer includes a non-lethal but temporarily disabling device which causes a wanted individual to be temporarily disabled to give the officer time to draw their weapon before the wanted individual can draw a weapon.

A self-defense apparatus includes a sleeve portion and an adapter connected to the sleeve portion. The sleeve portion includes a proximal end surface, an outer side surface, and a distal end surface. The sleeve portion defines an implement-receiving cavity that extends axially into the proximal end surface. The sleeve portion defines an adapter-receiving passage that extends axially into the distal end surface. A proximal portion of the outer side surface defines a handle portion that includes one or more finger grooves. A distal portion of the outer side surface defines an adapter-interfacing body. A first portion of the adapter body is disposed within the adapter-receiving passage. A second portion of the adapter body extends beyond the distal end surface. A distal portion of the second portion of the adapter body defines a conical body.

A personal alarm assembly includes a housing that is carried by a user. A plurality of speakers is each coupled to the housing. Each of the speakers emits an audible alarm outwardly from the housing when the speakers are turned on to alert a bystander to a threat posed to the user. A transceiver is positioned within the housing. The transceiver is in wireless communication with a global positioning system (gps) and an extrinsic communication network. In this way the transceiver can place a call for help to emergency responders and communicate the physical location of the housing to the emergency responders. An activation button is movably coupled to the housing. Each of the speakers and the transceiver is turned on when the activation button is depressed.

A computer-implemented method for monitoring a condition of a person includes receiving, at a computerized device, at least one signal from a condition sensor and determining if a condition is an emergency condition of a user based on the at least one signal.

Systems and methods for controlling a firearm. Components embedded in a portion of the firearm enable the firearm to determine if a user of the firearm is authorized to do so, and either enable or disable a firing mechanism of the firearm accordingly. The firearm may also send communication signals regarding the status of the firearm or events detected by the firearm to a remote device controlled by an authorized user. The system may thereby notify the authorized user of attempted unauthorized use of the firearm, that the firearm has been left behind by the authorized user, or that the firearm is being tampered with. The system may also include multi-tag or a voice-override features that prevent the firearm from being used against the authorized user should the authorized user lose control of the firearm.