Abstract: A communication system including a fluid-operated calling device mounted in a first location in a building, and a fluid-operated indicator mounted in a second location in a building and in fluid communication with the fluid-operated calling device, wherein actuation of the fluid-operated calling device causes the fluid-operated indicator to provide an indication that the fluid-operated calling device has been actuated. A fluid-operated lock may be mounted near the fluid-operated calling device and in fluid communication with a fluid-operated actuator, wherein actuation of the fluid-operated actuator causes opening of the fluid-operated lock.
Abstract: An audible alarm activated by a conventional safety valve of a domestic gas cylinder, so as to warn residents of gas being discharged into the atmosphere and contaminating the same; the alarm including a plug on a chamber into which the gas is discharged so that the plug is pushed outward and pull therewith a trigger arm away from a spring wound, toothed gear along whose edge a pivoted lever is bounced up and down so a hammerhead on the lever end strikes a bell.
Abstract: A stand structure, preferably for candle chimes comprises a base member, a pillar member which is detachably connected to said base member, a bracket member, preferably in the shape of a star and serving to hold the bells of the chime and a vertical shaft, the upper end of which being conical and serving as a journal for the rotor of the candle chime. The bracket comprises two identical parts, having indentations and cut out portions which when said parts are superimposed in register with each other form a circular opening for the shaft as well as an opening for cooperation with a corresponding portion of the pillar to keep the bracket parts pressed against each other and the shaft clamped between said bracket parts.