A safety network system is constructed by connecting a safety PLC to a safety slave through a safety network. The safety slave obtains safety input informations from a plurality of safety devices connected thereto and transmits information based on the plurality of safety input informations in response to a request from the safety PLC. At this time, the safety slave determines whether or not a safety condition is satisfied based on the plurality of safety input informations, includes two notific...

A safety container includes a container main body, an internal cap, and an external cap. The external cap is not rotated with the internal cap in a case where only the external cap is rotated in an opening direction. The external cap is rotated in a state where the external cap is pressed toward an internal cap side. The safety container includes an inner ring having an end part where an engaging part engaged at a top part of the opening part of the container main body is provided and another en...

A safety socket adapted for connecting with a terminal of a plug includes a socket housing with at least one electrode mounted thereon, a socket cover engaged with the socket housing, and a fixing case mounted in the socket housing. The socket cover has a plurality of insertion holes for allowing the terminals to pass therethrough. The fixing case includes an insulating housing and an electrode component. The electrode component has a pivotal portion pivoted on the insulating housing, a contacti...

A safety PLC having duplex power supply circuits, includes: a first output-stage transistor; a first DC power supply that drives the first output-stage transistor; a second output-stage transistor; a second DC power supply that drives the second output-stage transistor; a signal transfer path that includes a resistor and connect the first output-stage transistor to the second output-stage transistor; and a pair of overvoltage protection units, each of which is disposed between a pair of output t...

A switch includes a body with a switch member on a top thereof, an extension extends from an underside of the switch member, and a substantially inverted L-shaped slot is defined through the extension. Two terminals extend through a bottom of the body, in which one of the terminals is fixed with a contact plate. The contact plate has a tongue with a free end, which contacts the other terminal when the circuit is ON, and is separated from the other terminal when the circuit is OFF. An operation m...

A safety razor blade unit mounted for pivotal movement relative to a razor handle is biased to a normal rest position by a magnetic return force generated by a pair of magnetic that are so disposed that the return force increases as the pivotal displacement of the blade unit from the rest position increases.

A switch includes a body with a switch member on a top thereof, an extension extends from an underside of the switch member, and a substantially inverted L-shaped slot is defined through the extension. Two terminals extend through a bottom of the body, in which one of the terminals is fixed with a contact plate. The contact plate has a tongue with a free end, which contacts the other terminal when the circuit is ON, and is separated from the other terminal when the circuit is OFF. An operation m...

A basic module 2 has operation program storing part for prescribing the relation between the state of a safety input signal to be fetched from external input terminal sections 32, 33 and the state of a safety output signal to be transmitted to external output terminal sections 41, 42 for each type of predetermined safety switches, type-of-switch setting part for setting external input terminal sections 31, 32 and the type of safety switches to be connected to the external input terminal sections...

The invention is for a safety valve for a piping system. The safety valve has a cylindrical housing, a piston assembly with two disc-shaped pistons, each piston having at least one orifice defined therein, a shaft connecting the pistons, a valve stem, and a stop attached to one end of the valve stem. The safety valve has a valve seat with an opening shaped and sized to receive the stop. The safety valve has a spring positioned in the housing against the piston assembly so that the spring exerts ...

A safety candle comprising: a tea light candle holder and at least one tea light candle insert.