Abstract: A pneumatic tube system for conducting banking transactions with a non-captive carrier traveling between a bank teller terminal in a two-tube carrier conveyor connected with a remote customer terminal with visual communication between the teller and the customer. The terminals and tube structure and their components are combined, interrelated and cooperatively arranged with simple and inexpensive construction to provide quiet and reliable operation. Prior complex carrier delivery and dispatch holding and release devices and blower operating timers and controls are eliminated. The operation of a blower located at the customer terminal, which supplies air for pressure or vacuum movement of the carrier in the two-tube system, is controlled by carrier arrival at or dispatch from either terminal. Noise emanating from air currents in the system is reduced by mufflers located at the terminals in the tube system. The carrier moves through one of the mufflers during travel.

Abstract: A sound-damping housing suitable for use with a piece of sound-generating equipment. The housing has inner and outer housing parts, the former forming a chamber for receiving the piece of sound-generating equipment, with the two housing parts forming between themselves a second chamber for receiving a sound-damping liquid. This second chamber surrounds the receiving chamber, and suitable provision is made for allowing the piece of sound-generating equipment to be inserted into and withdrawn from the receiving chamber. By virtue of this arrangement, the sound-damping housing and the piece of sound-generating equipment may be transported separately from each other. Moreover, the liquid need not be introduced into the sound-damping housing until after the same has been transported to the place where it is to be installed, thus making it easier for the sound-damping housing to be transported.