US3307578A

US3307578A - Variable temperature fresh air or other gas supply units

Info

Publication number: US3307578A
Authority: US
Inventors: Chaloka Andrew
Original assignee: L J WING Manufacturing CO
Current assignee: L J WING Manufacturing CO
Priority date: 1964-03-31
Filing date: 1964-03-31
Publication date: 1967-03-07
Anticipated expiration: 1984-03-07

Description

F IG I INVENTOR, ANDREW Cl/AlO/(A ATTORNEY A. CHALOKA VARIABLE TEMPERATURE FRESH AIR OR OTHER GAS SUPPLY UNITS 5 Sheets-Sheet l March 7,. 1967 Filed Maron 51, 1964 Mrch 7, 1967 A. CHALOKA I 3,307,578

VARIABLE TEMPERATURE FRESH AIR OR OTHER GAS SUPPLY UNITS FIGA- March 7, 1967 A. CHALOKA 3,307,578

VARIABLE TEMPERATURE FRESH AIR OR OTHER GAS SUPPLY UNITS Filed Marcha. 1.964 v 5 sheets-sheet United States Patent O 3,307,578 VARIABLE TEMPERATURE FRESH AIR R OTHER GAS SUPPLY UNITS Andrew Chaloka, Clark, NJ., assignor to L. J. Wing Mfg.

C0., Division of Aero-Flow Dynamics, Inc., Linden,

NJ., a corporation of New York Filed Mar. 31, 1964, Ser. No. 356,315 Claims. (Cl. 137-601) This invention relates to Variable temperature fresh air or other gas supply units.

One object of this invention is to improve the Gas Supply Unit disclosed in United States Patent No. 3,107,- 724 issued Oct. 22, 1963.

In the past, difficulty was experienced with units disclosed in said Patent 3,107,724 because units set up in the field were not being adjusted properly, thus resulting in poor performance.

These units consist of finned tube heat section and a bypass section. The required temperature on the outlet side is controlled by modulating the amount of inlet air through the heat and by-pass sections. This is accomplished by the opening and closing of an inverted V type damper which modulates the amount of incoming cold and hot air to the temperature desired. All the dampers are fastened to rotating shafts which are all connected to cranks and tie bars which are all connected to the main drive shaft. The turning rof this drive shaft is limited to a predetermined rotational travel. If this travel is exceeded, a permanent damage is caused to the damper contour, which is so very important to the closure of the heat and by-pass sections. This meant the rebending of -the damper blades back to their original contour, which can only be done by a qualied service man.

It is therefore another object of this invention to provide highly improved means embodying the invention to 5- limit the rotation of the drive shaft to a predetermined angle.

In accordance with this invention, the drive shaft extends the full length of the unit to give it good bearing stability. No dampers are attached to said drive shaft except for one drive crank which is Welded to it. This drive crank is connected the control bars which drive all the damper rods. The precise limitation of the angular movement of the drive shaft, in accordance with the present invention, is accomplished by means, acting on this drive crank, and properly adjustable to limit rotary movement of the drive shaft in either direction to the pre-set, desired angular positions/thus preventing any over-travel, and hence preventing damage to the dampers.

Yet another object of this invention is to provide a strong and durable unit-of the character described which shall be relatively inexpensive to manufacture, easy to ad- -vjust, positive in action, and practical and efficient to a high degree in use.

Other objects of this invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction, combination of elements, and arrangement of pairs, which will be exemplified in the construction hereinafter described, and of which the scope of invention will be indicated in the following claims.

In the accompanying drawings in which is shown an illustrative embodiment of this invention.

FIG. 1 is a top View of a fresh air or other gas supply unit;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a side elevational vieW of said unit;

FIG. 4 is an enlarged cross-sectional view taken on line 4-4 of FIG. 2;

FIG. 5 is an enlarged view of the drive rod and drive 3,307,578 Patented Mar. 7, 1967 ICC crank and the stops therefor, embodying the invention,

and;

FIG. 6 is a cross-sectional view taken on line 6-6 of FIG. 5, and showing the drive crank in full lines in one end position, and in dot-dash lines, in another position.

Refering now in detail to the drawing, 10 designates a fresh air supply unit embodying the invention. This unit may generally be constructed similarly to the gas supply unit disclosed in said Patent No. 3,107,724, except that fewer heat treated and by-pass passages are employed, and also except for other differences which will appear from the description hereinbelow and in the drawmgs.

Said unit 10 comprises a generally rectangular casing 11 having a front wall 12, a rear wall 13, and side Walls, 14 and 15. Attached to

walls

12, 13 by

brackets

12a, 13a, respectively, is a by-pass member 16 dividing the casing into a central by-pass passage 18 and side heated or heat treated passages 19 Air may flow down through said passages.

The heated passages may be heated by means of steam or other iluid heating media passing through an inlet pipe 22, through a plurality of U-shaped pipes 23 and through an loutlet pipe 24. Pipes 23 are located in the heated passages 19.

It will be observed that cooling fluid may replace the heating iluid, whereby the passages 19 are cooled. In any event said passages 19 are heat treated passages. Also any suitable gas other than air may pass down through the casing.

Supported at the upper end of the casing and at

side walls

12 and 13 are transverse horizontal bearing

strip members

25, 26, in which are journalled pairs of horizontal, aligned, opposed

damper rods

28, 29, 30, 31. End

dampers 28a, 31a are attached to

rods

28, 31, respectively, `projecting down into the heat treated passages 19.

Inverted V-

shaped dampers

29a, 30a are attached to said

rods

29, 30, respectively. Each of

dampers

29a, 30a has a damper wing projecting down into a heat treated passage 19, and a wing projecting down into the by-pass passage 18.

Fixed to rod 31 at the front wall 12 and located in front of said front wall, is a crank 31b projecting upwardly. Fixed to rod 29, is an upwardly projecting crank 29b in the plane'of crank 3117. A horizontal control bar 34 is pivoted to cranks 3117, 29b, as at 31C, 29e, respectively.

A crank 30b is fixed to rod 30 at the front wall 12 and located in front of said front wall, and projecting downwardly therefrom, is a crank 30b, Fixed to the rod 28, on the front wall 12, and located in front of said front wall, is a crank 28b. A control bar 36 is pivoted to the lower ends of cranks 28b, 30b, as at 28C, 30e. When cranks 29b, 31b are straight up, cranks 28b, 30b are inclined down to the right at about 45. A connecting bar 38 is pivotally connected to pivots 28C and 31C.

Filler strips

40, 41 attached to

walls

14, 15, respectively, close the spaces between dampers 28a and 31a and

walls

14 and 15, respectively.

Means is provided to move the dampers. To this end a drive rod 50 is journalled in the

bearing strips

25, 26, and passes through the

walls

12, 13. This drive rod may be rotated in opposite directions by any suitable electric or air motor, through suitable linkages and connections, not shown. Welded =or otherwise fixed to said rod 50, is a crank 51 having an upwardly extending arm 52 parallel to cranks 29h, 31b. Said crank 51 is pivoted at its upper end, to control bar 34, as at 53.

The by-pass passage 16 comprises

vertical walls

16a, 16b parallel to

walls

12 and 13, respectively, and interconnected by vertical walls 16e and well spaced from

Walls

14, 15.

Welded to an upper portion of wall 16a which overlies the bearing strip 25, is a bracket 60. Bracket 60 cornprises a vertical rectangular plate 61 having a top edge 61a, a bottom edge 61b, and side vertical edges 61C, 61d. Said plate is formed with a through opening 62 through which drive shaft 50 passes. Opening 62 is located somewhat cl-oser to edge 61d than to edge 61C, and somewhat closer to edge 61a than to edge 61b. Fixed to the inner vside of said plate, as by welding thereto, is an angular lug 63 comprising an arm 63a inclined upwardly and to- Ward wall 14 at 45 to the horizontal, and terminating at edge 61e, and a second integral arm 63b projecting downwardly and terminating at lower edge 61b.

Arm 63a is formed with a screw threaded opening 64 inclined 45 upwardly and toward wall l5. Arm 63b is formed with a horizontal threaded opening 65.

Screwed to opening 64 is a set-screw 66 projecting therethrough. A lock nut 67 is screwed onto screw 66 and contacts the underside of arm 63a.

A set-screw 68 is screwed through opening 65 and a lock nut 69 is screwed thereon to contact arm 63.

The axes of threaded openings 64, 65 are in a common vertical plane of crank arm 52.

Crank 51 has a downwardly projecting arm 70 in the plane of arm 52 and having a vertical edge 70a, when the crank is in vertical position, and said edge is adapted to be contacted by the set-screw 68 in such position, when drive rod 50 is rotated in a clockwise direction, looking at FIGS. 2 and 5. In such position, the by-pass passage 18 is open, as seen in FIG. 2, and the heat-treated passages 19 are closed by the dampers. Upon rotating the drive rod 50 in a clockwise direction from the fuel line position of FIGS. 2 and 5 to the dot-dash position of FIG. 5, set-screw 66 will contact an edge of arm 52 to positively stop rotation of said arm. In such position, the by-pass passage will be closed and the heat treated passages will be opened by the dampers. Said crank 51 may have a wider hub 51a, as shown in FIG. 6. The setscrews 66, 68 may be adjusted to get accurate stoppage of crank 51, to prevent -over-movement of the cranks 28h, 29h, 30b, 3111, thereby preventing damage to the dampers.

It will be observed that the drive shaft 50 extends the full length of the unit to give it good bearing stability. No dampers are attached to the drive shaft. It is independent except for the crank 51 which is welded to it. It is this crank 51 which is connected to the control bars which drive all the damper rods.

Usually a 50 rotation is allowed, although this angle can be varied. By the proper adjustment of the setscrews 66, 68, the 50 rotary motion can be accurately limited. When the drive shaft 50 has travelled its 50 in either direction, it hits a solid, pre-set stop (set-screws 66 or 68), thus limiting any over-travel which in turn prevents damper damage.

It will thus be seen that there is provided an apparatus in which the several objects of this invention are achieved, and which is well adapted to meet the conditions of prac- ,tical use. Any possible embodiments might be made of the above invention, and as various changes might be made in the embodiment above set forth, it is to be understood that all matter herein set forth or shown in the accompanying drawings, is to be interpreted as illustrative and not in a limiting sense. i 4 A' i i A I claim:

1. In combination, a bracket comprising a flat plate, a lug integral with said plate and extending therefrom, said plate being formed with a through opening, a shaft journalled in said opening, a crank xed to said shaft, an eX- tenison on said crank, said lug being formed with a pair of angularly disposed connected wings formed with threaded openings, set-screws threaded through said openings and one of said set-screws being positioned to contact said crank upon rotating said shaft in one direction and the other of said set-screws being positioned t-o contact said extension of said crank upon rotating said shaft in an opposite direction, said set-'screws forming an acute angle therebetween, and said shaft being located within said angle.

2. The combination of claim 1, the axes of said threaded openings lying in a common plane, and being co-planar with said crank and its extension.

3. In a gas supply unit, in combination, a casing having passages therethrough, each passage having an inlet and an outlet, a plurality of dampers in the casing to control passage of gas through said passages from the inlets to the outlets thereof, means to pivotally and nonslidably mount said dampers on parallel axes in a cornmon plane, parallel crank arms fixed to rotate with said dampers about said parallel axes, a connector bar, means to pivotally and non-slidably connect said crank arms to said bar about parallel axes in a common plane, a bracket comprising a plate fixed to said casing, a drive shaft parallel to said axes, and journalled in a bearing opening formed in said plate, a control arm parallel to said crank arms, mounted for rotation with said drive shaft, means to pivotally connect said control arm to said connector bar, said plate being provided with an integral lug having a pair of connected wing portions forming an obtuse angle therebetween, divergent set-screws screwed to said wing portions, and forming an acute angle therebetween, and said control arm being provided with an integral extension adapted to contact one of said set-screws .upon rotating said control arm in one direction, and said control arm being adapted to contact the other set-screw upon rotating said control arm in an opposite direction, said bearing opening for said drive shaft being located Within said acute angle.

4. The combination of claim 3, said setscrews being located in the plane of said control arm and extension thereof.

5. The combination of claim 3, and lock nuts on said set-screws adapted to contact said wings.

References Cited by the Examiner UNITED STATES PATENTS 1,014,679 1/1912 Von Wagner 98-110 X 1,016,064 1/1912 Broeke 251-285 1,931,419 10/1933 Thrush 251-285 X 2,514,431 7/1950 West 251-288 X 3,107,724 10/1963 Horn et al 98-38 X FOREIGN PATENTS 171,946 12/1921 Great Britain.

WILLIAM F. ODEA, Primary Examiner, D. LAMBERT, Assistant EJamn'er,

Claims

3. IN A GAS SUPPLY UNIT, IN COMBINATION, A CASING HAVING PASSAGES THERETHROUGH, EACH PASSAGE HAVING AN INLET AND AN OUTLET, A PLURALITY OF DAMPERS IN THE CASING TO CONTROL PASSAGE OF GAS THROUGH SAID PASSAGES FROM THE INLETS TO THE OUTLETS THEREOF, MEANS TO PIVOTALLY AND NONSLIDABLY MOUNT SAID DAMPERS ON PARALLEL AXES IN A COMMON PLANE, PARALLEL CRANK ARMS FIXED TO ROTATE WITH SAID DAMPERS ABOUT SAID PARALLEL AXES, A CONNECTOR BAR, MEANS TO PIVOTALLY AND NON-SLIDABLY CONNECT SAID CRANK ARMS TO SAID BAR ABOUT PARALLEL AXES IN A COMMON PLANE, A BRACKET COMPRISING A PLATE FIXED TO SAID CASING, A DRIVE SHAFT PARALLEL TO SAID AXES, AND JOURNALLED IN A BEARING OPENING FORMED IN SAID PLATE, A CONTROL ARM PARALLEL TO SAID CRANK ARMS, MOUNTED FOR ROTATION WITH SAID DRIVE SHAFT, MEANS TO PIVOTALLY CONNECT SAID CONTROL ARM TO SAID CONNECTOR BAR, SAID PLATE BEING PROVIDED WITH AN INTEGRAL LUG HAVING A PAIR OF CONNECTED WING PORTIONS FORMING AN OBTUSE ANGLE THEREBETWEEN, DIVERGENT SET-SCREWS SCREWED TO SAID WING PORTIONS, AND FORMING AN ACUTE ANGLE THEREBETWEEN, AND SAID CONTROL ARM BEING PROVIDED WITH AN INTEGRAL EXTENSION ADAPTED TO CONTACT ONE OF SAID SET-SCREWS UPON ROTATING SAID CONTROL ARM IN ONE DIRECTION, AND SAID CONTROL ARM BEING ADAPTED TO CONTACT THE OTHER SET-SCREW UPON ROTATING SAID CONTROL ARM IN AN OPPOSITE DIRECTION, SAID BEARING OPENING FOR SAID DRIVE SHAFT BEING LOCATED WITHIN SAID ACUTE ANGLE.