Abstract: A dispenser for dispersing of a drug comprising a housing (1) forming a cylinder. The cylinder is at one end closed by an end wall (2) having an outlet pipe (3) and the other end is closed by a plunger (4) which is axially displaceable into the cylinder. The outer end of the plunger (4) is secured to the inner side of a cup shaped cap (13, 14) sliding over the outer side of the cylinder. When the plunger (4) is pressed into the cylinder, the upper edge of the housing (1) being provided with outwardly projecting hooks (15) sliding in corresponding grooves (16) in the inner side of the side wall (14) of the cap wall irreversibly engage windows (20) at the bottom (13) of the cap. The cap (13, 14) and the housing (1) is made from differently colored materials.

Abstract: A dispenser comprising a housing forming a cylinder which is at one end closed by an end wall provided with an outlet pipe, and at the other end closed by a plunger projecting from this open end of the cylinder and being axially displaceable into the cylinder towards the end wall. The dispenser is characterized in that the outer end of the plunger is secured to the bottom of a cup shaped cap and the cylinder is provided with outwardly projecting hooks that engage the cap preventing reuse of the device.

Abstract: A dispenser for dispensing a dosage or a powdery or fluid drug from a cartridge having a tubular chamber the ends of which are sealed by breakable membranes. The dispenser comprises a housing forming a cylinder which is at one end closed by an end wall through which an outlet pipe communicates with the interior of the cylinder. The other end of the cylinder is closed by a plunger which may be displaced into the cylinder. The drug cartridge is placed in a piston mounted axially displaceable in the cylinder between the end wall and the plunger, and the tubular chamber extends from one side of the piston to the other. Penetrators for breaking the membranes are provided at the inner end of the outlet pipe and the inner end of the plunger.

Abstract: A fire-preventive and flame-proof housing for line delay measuring apparatus, the components including a high-tension voltage supply, a display tube and operating elements and indicator elements, comprises a first section defined within the housing in which are positioned components carrying relative low voltages and without significant fire hazard, a second section defined within the housing adjacent to the first section, wherein are positioned those of the components carrying high voltages, and such components as are otherwise intrinsically unsafe, the second section being hermetically sealed and filled with insulating material. The housing includes a front panel and a partition separating the first and second sections, a cover is detachably mounted on the housing and sealed relative thereto by a resilient sealing element about an aperture of the housing.