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1948-49 Theatre Catalog, 7th Edition, Page 50 (40)

1948-49 Theatre Catalog, 7th Edition
1948-49 Theatre Catalog
1948-49 Theatre Catalog, 7th Edition, Page 50
Page 50

1948-49 Theatre Catalog, 7th Edition, Page 50

main foyer, has individually illuminated dressing tables and natural oak stools with a large pouffe in the center.

Sight and Sound

The projection suite consists of an electrical room which houses the rectifiers and switching equipment; the projection room; the rewind room; and the auxiliary room. Sound and projection equipment includes three individual machines and two complete amplifier systems, providing adequate emergency service. The G.K. 21 system equipment was supplied and installed by GaumontKalee Ltd., Toronto, and designed and manufactured by G. B. Kalee Ltd., England, (This projection equipment was described in the 1947-1948 Edition of THEATRE CATALOG, pages 332-337.)

The are lamps in the projection niachines are a special type utilizing 16-inch diameter reflectors. The lenses, made by Kershaws of Leeds, England, are coated and specially color corrected, with a speed of f1.9. The purpose of the oversize reflectors is to synchronize the speed of the optical system, that is, the redectors and lens system. Single high speed shutters are utilized by the projectors.

In place of the conventional generator system, the Odeon-Toronto uses a recent model rectifier manufactured in England by Neverlin Electric for changing the current from AC to DC. These are the mercury arc type with pinch type connectors. For each projector there is one rectifier capable of delivering 100 amps. at 90 volts.

The projection room is equipped with three individual monitor amplifiers, one for each machine. There is also a 3000watt incandescent spotlight for playing on the stage. All wiring is concealed and the entire suite is completely fireproof. To reduce noise to a minimum, acoustical plaster has been uSed on the walls and ceilings; and special provision has been made to minimize light transmission loss from the projection room to the screen.

Fair Weather

The air in the theatre is conditioned by two central distribution units: one on the sixth floor and the other in the

basement. The sixth floor unit handles 48,000 cfm, distributing conditioned air through a series of acoustically treated duct work systems between the roof and ceiling of the auditorium. From this duct work, air is injected into the theatre through strategically hidden diffusers of a special type that creates a wide distribution and continual circulation of air from the ceiling to the floor and back to the ceiling again. The basement unit handles 46,000 cfm and services the lower and rear part of the theatre. As in the other system, the diffusers are specially designed to create a draftless air diffusion pattern to fit the conditioned area.

Cooling of the theatre centers around a gigantic 86,000-gallon tank of Lake Ontario water under the floor of the auditorium. Measuring 54 feet long, 34 feet wide and 15 feet deep, this tank keeps its water constantly cooled to 40 degrees Fahrenheit by two 60 HP. refrigerating machines and 14 turbonow water chillers. Heat contained in the water is absorbed by refrigerant gas and dissipated through the condensing units. Even during the hottest days in the summer, when the temperature of Lake Ontario water rises, there need be no fluctuation of the air temperature in the theatre because of the sustained flow of 40-degree water. It is pointed out by air conditioning engineers that the initial cost of the installation is increased by the large water tank; but that, by reducing the size of the required compressors, the tank saves money in reduced consumption of electric power. In the two main air conditioning systems, air containing latent heat is passed through cooling coils at approximately 500 feet a .minute; and the cooling coils, with 40-degree water from the storage tank passing through them absorb this heat.

In the 900-seat balcony of the theatre, there is a special ventilating system designed to exhaust cigarette and other smoke from the air. This system is capable of exhausting 18,000 cfm of smokeladen air when concentrations dictate this rate of purification. The system is

also designed to handle automatically

DETAIL OF THE FURNISHINGS in the powder room oi! the main foyer with double sided make-up mirrors.

varying conditions that may prevail depending on the proportions of smokers and non-smokers.


Virtually every kind of heating system made for commercial buildings is represented somewhere in the Odeon-Toronto and each type has been designed to suit the peculiarities of the spaces to be heated. The elaborate air conditioning system for the auditorium and offices has its air tempered by steam-heated coils. Supplementary heat for the offices and individual rooms is supplied by finned convectors. The huge stage and some other parts of the building are heated by thermostatically controlled unit heaters. In the lobby radiant heat is used, with coils embedded in the cement floor. This heating will melt any snow carried into the lobby on patrons' feet and also keep the floor dry. A curtain of warm air is directed across the glass front and doors of the theatre entrance by a fan driven unit heater through concealed duct work, to prevent frost and condensation on the glass.

Heat for these facilities is supplied by tw0 erect welded steel steam heating boilers with a nominal rating of 125 HP. each and automatically fired by two industrial type stokers. Every safety precaution known to modern heating engineers has been installed on the boilers, including automatic water feeders, hand controls, and low water cut-offs. Sensitive pressure gauges not only inform engineers of the exact status of the system at all times but act as a counter check for the delicately balanced automatic instruments which are the nerves of the system.

An extremely efficient component of this steam heating system is a differential vacuum pump that literally stretches steam until 190 degrees is reached. This is said to be very economical in-the spring and fall when cooler steam is required. The pneumatic controls attached to the system will anticipate outside temperature changes from half to three-quarters of an hour before the actual change thus regulating the system to, coincide with temperature vacillations.

It has been estimated that there are more than four miles of pipe on the heating system alone. In addition, there are over two miles of pipe in the cooling system. Most of the piping system fans out from a huge tunnel beneath the auditorium, using the Hartford Loop, which the engineers considered the most efficient for this type of installation. All mains How downwards in the direction of the flow of steam with a fall of not less than V2 inch in 10 feet. All pipe over 21/2 inches is lap welded. No risers are visible in the buildingethey are all concealed in walls and floors.

Temperatures in the entire building are controlled by the pneumatic system of control for both heating and cooling, highly sensitive temperature regulators being installed at strategic points throughout the building. The office section of the building has a temperature control system made up of a 3 inch control valve, automatic selector, heat balancer, night thermostat, two day thermostats and a control panel with an

1948-49 Theatre Catalog, 7th Edition, Page 50