Abstract: The present disclosure relates to a short-range communication device (10, 10?, 5 10?) for a personal protective equipment or a personal protective device (200, 210, 220, 230) comprising a transmission unit (20, 20?, 20?) for wirelessly transmitting a voice signal of a user (100, 110, 120, 130, 140, 150, 160) to a receiving unit (40,40?, 40?) over a predetermined distance such that a communication channel is established between the transmission unit (20, 20?, 20?) and the receiving unit (40, 40?, 40?) so that a user (100, 10 110, 120, 130, 140, 150, 160) can hear the voice signal. The present disclosure further relates to a short-range communication system comprising at least two short-range communication devices (10, 10?, 10?) according to the present disclosure and to a method of establishing a short-range communication between such devices (10, 10?, 10?).

Abstract: Used computer printer, W.P. or typewriter ribbons are reinked using a machine having a ribbon spool or cartridge loading station, an ink applicator and opto-electric sensors disposed one each side of the applicator along the ribbon path. Manual or automatic control inresponse to the sensor output signals representative of the density of ink (darkness), enables the application of a quantity of ink sufficient to produce a desired ink density along substantially the entire length of the ribbon.

Abstract: An elevating jig, particularly suitable for elevating selected semi-conductor wafers in boat or holding member, has a base and a plurality of removable lift members which fit in apertures in the base. A locating member is provided at one end of the base for positioning a holding member on the base and the apertures in the base are at predetermined positions from the locating member. Lift members can be positioned as desired and when a holding member is placed on the jig certain wafers are lifted up, enabling easy withdrawal.

Abstract: An improved progressing cavity pump of the Moineau type having a helically externally threaded rotor coacting with an internally helically threaded stator. In a Moineau pump where the pump casing is a singular tubular unit, the stator is bonded to the casing with an adhesive. When the pumps are used with a corrosive fluid, such as caustic soda, the adhesive is attacked and the stator becomes free to rotate. To prevent the stator from rotating, a rib is attached along a portion of the casing. The rib restrains the stator and prevents its rotation.