Abstract: In a wall or other vertical surface mounted dispensing apparatus which receives a tube of viscous material has a base which supports a pair of substantially vertical gear tracks for receiving a cylindrical roller which has a plurality of gear teeth about the periphery at each end of the roller for engagement with said gear tracks. The roller is provided with a handle mounted on and axle which is rotatably attached to the roller through end caps which maintain the axle along the central axis of the roller but permit rotation relative to the roller. A cover holds the roller in place by exerting pressure on the cylindrical surface adjacent to the peripheral gears. The axle engages a pair of weights a point offset free the central axis of the weight which cause rotation of the crank arm in the upwards direction when released. A recoil arm mounted on a rectangular section of the axle is displaceable along its longitudinal axis.

Abstract: There is a method and disclosed apparatus for detecting for the presence within a gaseous atmosphere of a gas of a concentration above a preset level. The detecting apparatus comprises a sensor including a heater/anode element and a collector/cathode element disposed to define a space therebetween through which the gaseous atmosphere flows. An actuable power supply is coupled to the heater/anode element and to the collector/cathode element for applying power thereto, whereby ionization of the gas causes a current flow through the collector/cathode element of a magnitude proportional to the concentration level of the gas in the gaseous atmosphere. An actuable alarm means provides an indication of the presence of the gas above the preset level. Detecting apparatus control operates the detecting apparatus in a monitoring mode, wherein the power supply is actuated and the alarm deactuated to detect and compare the current flow with the preset level.