Abstract: A personal air sampling pump assembly includes a motor having a reciprocating piston for operating a diaphragm assembly. The diaphragm includes a valve head including a fluid inlet and a fluid outlet and a fluid chamber defining a fluid path between the inlet and outlet. A first and second diaphragm sealing engaging the valve head and enclosing the fluid chamber. The first diaphragm includes a piston diaphragm membrane portion coupled to the piston for reciprocating with the piston and wherein reciprocation of the piston causes a change in air pressure within the fluid chamber to cause air to move from the fluid inlet toward the fluid outlet. Both the first and second diaphragms include a damper membrane portion, which cooperate to reduce an amplitude of pulsation in the airflow at the fluid inlet and fluid outlet.

Abstract: A ratchet wrench comprises a handle defining a cavity including a plurality of teeth on an inner periphery thereof, a wheel, a biasing spring ring, and at least one tooth pawl mounted in recesses formed on the outer periphery of the wheel. The wheel is rotatably mounted inside the cavity and the pawls are biased by the spring ring to engage the plurality of teeth on the inner periphery of the cavity when rotated in a first direction, and to slide over the teeth when rotated in a direction opposite the first direction.

Abstract: Handheld communications devices include a communications port, at least one battery, and processing circuitry configured to automatically determine a network address of a network node connected to the communications port, to communicate with the network node using the determined network address, and to consume energy stored by the battery. Communications methods include using a handheld communications device connected to a network node, automatically determining a network address of the network node; using the handheld communications device, communicating with the network node using the determined network address; and based on the communicating and using the handheld communications device, verifying that the network node is operational.

Abstract: A method for automatically assigning a group address to a first controllable luminaire device of a plurality of controllable luminaire devices. The method determines whether adding the first controllable luminaire device to a logical community of controllable luminaire devices causes a number of controllable luminaire devices within the logical community of luminaire devices to exceed an established threshold. When it is determined that adding the first controllable luminaire device to the logical community of luminaire devices causes the number of controllable luminaire devices within the logical community of luminaire devices to exceed the established threshold, the method automatically assigns to each of the plurality of luminaire devices within the logical community of luminaire devices a group address for use in simultaneously controlling the luminaire devices as a group.

Abstract: A crimping tool for an electrical connector includes a frame defining an interior, a handle rotatably coupled with the frame, and a receptacle disposed within the interior of the frame and configured in size and shape to receive an electrical connector. The crimping tool further includes a push member, coupled with the handle, configured to apply a compressive force to an electrical connector disposed within the receptacle responsive to actuation of the handle relative to the frame and a blade coupled to the frame, to the receptacle, or to the push member, so as to be actuatable to cut excess wiring from an electrical connector disposed within the receptacle.

Abstract: A junction box has a main body defining an interior space and a lid hingedly connected to the main body for use in enclosing the interior space. The main body includes an inlet for allowing an end of electrical cable to be positioned with the interior space. The inlet is formed by a first pair of spaced flaps between which is defined a first slot into which the electrical cable is to be positioned and a second pair of spaced flaps between which is defined a second slot into which the electrical cable is to be positioned. Each of the first pair of flaps is arranged to extend outwardly from the defined first slot at an angle that is away from the interior space to provide a structure that will inhibit a pushing of the electrical cable further into the interior space. Each of the second pair of flaps is arranged to extend inwardly from the defined second slot at an angle towards the interior space to provide a structure that will inhibit a pulling of the electrical cable from the interior space.

Abstract: A twist-on wire connector is releasably engageable with a tool. The connector and the tool are provided with complimentary driving features which allow the tool to be moved independent of and relative to the connector when the tool is moved in one rotational direction and which place the tool and connector into driving engagement when the tool is moved in the opposite rotational direction such that the connector is moved with the tool to apply the connector onto a plurality of electrical conductors. The complimentary driving features are provided to the tool and the connector by providing to each of the tool and the connector one or more engagement surfaces positioned adjacent to a slipping surface.

Abstract: A charging module usable with a conductive bus having a center rail disposed intermediate a first conductive rail and a second conductive rail. The charging module has a base on which is disposed a centered electrical contact and a first plurality of electrical contacts. The centered electrical contact is arranged on the base such that the centered electrical contact will engage with the center rail when the housing is placed into a use position on the conductive bus.

Abstract: An electrical buss has a carrier and at least a pair of electrically conductive elements. The at least a pair of electrically conductive elements extend linearly along a length of the carrier and at least a portion of each of the least a pair of electrically conductive elements is exposed at a surface of the carrier. A connector is releasably couplable to the electrical buss adjacent to the surface of the carrier. The connector has at least a pair of electrically conductive contacts for engaging with the electrically conductive elements at any desired location along the length of the carrier.

Abstract: An example low voltage buss system is provided. The low voltage bus system distributes low voltage DC power into the office workspace in a manner that reduces clutter and promotes customizable and efficient workspace usage. The low voltage bus system distributes low voltage DC power into the office workspace via an electrical buss having a connector at the end of the buss to distribute low voltage DC power to and throughout office workspace and, in particular, office furniture.