US1788067A - Temperature control - Google Patents

Description

Jan.- 6, 1931. c. J. SCANLAN TEMPERATURE CONTROL Filed March 25, 1929 2 Sheets-Sheet l a 9 c. J. SCANLAN 1,788,067

TEMPERATURE CONTROL Filed March 25, 1929 2 Sheets-Sheet 2 UNIE CHESTER J. SCANLAN, or BLOOMINGTON, ILLINQIS,-ASSIGN'OR To AME ICAN roimnnir' & FURNACE COMPANY, or BLooMINGToN, ILLINOIS, A oonrone'rrotr orILLINo s TEMPERATURE'CONTROL Application filed March 25, 1929. Serial No.,349,52a.

This invention relates to the distribution, from a common source, of air or gas through pipes to remote locations, and also where it is desired to use a centrifugal fan to accelerate air delivery through a duct or pipe.

This invention has utility in its application to warm air heating installations in'buildings of different kinds. It may be applied for the purpose of increasing the speed of lo the air and hence the volume of the air thru any particular pipe to which it is applied.

The motor may be started and the fan begun to operate by manually operating an ordinary'electric switch, or, through the use of 1;; an electric thermostat. The fan may be antomatically started whenever the temperature falls below a given point and stopped automatically when the temperature has reached the predetermined point. This presupposesa continuous source of heat connected at the pipe in question.

Referring to the drawings:

Fig. 1 is a fragmentary view of a building showing features of the invention incorporated therewith;

Fig. 2 is a detail view on an enlarged scale on the line II-II, Fig. l;

Fig. 3 is a section on the line III-III, Fig. 1;

Fig. 4 is a view looking into a different type of elbow device for promoting air flow hereunder;

Fig. 5 is a plan view of the device of Fig. 4; and

Fig. 6 is a section on the l1ne VI.VI, Fig. 1, looking in the direction of the arrow.

On basement floor 1 there isshown a furnace having combustion chamber 2. Fire door damper 3 and ash pit damper 4 permit intake of combustion promoting air to pass with the products of combustion up flue 5 for discharge at chimney 6. An entirely independent air flow system is involved in heating the building herein. From room 7 there is shown cold air register 8 having communication by duct 9 and box 10 to jacket 11 about the combustion chamber and furnace 2 in the main housing 12 of this furnace.

This jacket 11 has dome or top portlon 13 from which extend branches 14, 15, 16,150

different remote places. The duct 14 extends to warm air register 17 in the room 7 The duct 15 is shown as extending to port 18 (Fig. 3) at scroll19 inbox 20 as an elbow or boot. In this box 20'is located centrifugal.

fan 21 for operation by motor 22, the control of which is from switch 23 in room 24.. The.

operation of this fan 21 creates a pull on the warm air in the branch 15 out of proportion to the normal flow from the jacket 11 and pushes such from the scroll 19 up rectangular inter-wall duct 25 to warm air register 26-;

in the room 24..

Instead of this scroll type with riser therefrom in the box 20 as'an elbow fitting in a Y branch, there maybea supply line (Figs.

4. 5,) entering box 27 through intake port ,1

28. Air thus supplied maybe acted upon by fan 21 driven by motor 22. Herein, the

delivery via horizontal elbow' may. be to.

duct 29. It is accordingly seen that in this elbow assembly there may be location of the 'shown adjustable thermostat device 36 connected for cutting in motor 22 at the housing 31. In addition to the automatic control 36, there may be alternatively used manual control switch 37 for cutting out the thermostatic control 36. This motor 22 is provided with the fan 21 in eflt'set 38 from the housing 31. This oifset 38 is provided with pin or bearing 39 having vane portion 40. Between this bearing 39 and the port 30 there is, from the housing 31, port 41 axially to the fan 21. The position of the vane 40 is normally at seat .42 for the straight-away gravity or normal draft air flow from the port 30 past the port 32.

However, as there may be occasion in room 35 for increased delivery of warm air from the furnace, the thermostat 36 may automatically cut in the motor 22, thereby at once starting the fan\21. This means that air as supplied from duct 16 through the port 30 into the housing 31 is drawn into the port l1 and centrifugally, by the scroll 19, delivered from the fan 21 against the vane 40 as at the seat 42, at once swinging such vane into position transversely of the housing 30 for this acceleratedfiraft flow as a positive stream entering the port 30 to the housing 31, thence by port 41 through the fan 21 and past the seat 42 again to the housing 31 on the opposite side of the vane 40 with flow through the port 32 into the duct 33. a

In the installation as herein disclosed, there is a flexibility for definite control even under greatlymnbalanced weather conditions as to wind or temperature. This makes possible even with the delicate installations as so sensitive for heating disturbance as warm air systems that the requirements may be accurately given response manually or automatically, and that even with such installations there may be retained gravity condition without acceleration, for each of the locations, or any certain one thereof. It is thus seen that gravity flow may be through each of the branches. The circuit is independent of that of the combustion region.

The heating is herein shown as direct from the conductivity of the combustion chamber instead of indirect from steam coils or hot water coils, although such may be supplemental means for the branch or branches. This special acceleration as in a branch independently of disturbance in other branches, permits the placing of the quantities of warmed gas or air on the windward side when the leeward side may be amply warm. It also will permit an abnormal rise in a special room as that for children, dressing room, sickroom or bathroom. This simple device is readily installed in old installations or incorporated in'new installations; makes the installation one of a'maximum degree of flexibility for accurate temperature 'response.

The flexibility of this device is one which permits ready inclusion in a plant having an installation, whether with cylindrical or rectangular pipes. The adaptor fitting 29, such as shown in Fig. 4, may be attached say to the port 18 in Fig. 3 device for rectangular pipe assembly each Way, or this fitting may be on each side in the device of Fig. 5 or other pipe in the system where it is desired to have such adapted to meet the requirements of the duct as to the intermediate region. It is accordingly seen that this device with a motor outside the pipe and accordingly not exposed to the deleterious action of the temperature may be installed to promote draft flow in the wide variety of requirements whether for a rectangular-horizontal to cylindrical-vertical; a cylindrical horizontal to a rectangular-vertical, whether right angle elbow or left angle elbow; whether in a plane or vertical or even straight away. I

What is claimed and it is desired to secure by United States Letters Patent is:

1. In an air distribution system embody.-

ing a plurality of branches, a branch duct -flow laterally of the fan, said housing providing a Way of greater cross sectional extent than said fan extent.

2. In an'air distribution system embodying a plurality of branches, a branch duct providing a gravity air flow normal clearway, and an air circulation booster fitting therefor comprising a housing, a fan in and of minor extent as to said housing, said housing having an axial intake port opposing the fan of greater cross-sectional area than the fan extent, a motor drive for the fan exterior of the housing opposite the intake, said housing having a delivery port for tangential air flow laterally of the fan, said housing providing a way of greater cross sectional extent than said fan extent, and a vane in said housing in idle position of the fan closing said delivery port to leave clearway through the housing independently of past said fan, said vane on fan operation being swingable to open said delivery port and direct air flow to said In-

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