US1948627A - Air register for fuel burners - Google Patents

Description

Feb. 27, 1934. E. H. PEABODY AIR REGISTER FOR FUEL BURNERS Filed April 20, 1931 2 Sheets-Sheet 1 FleA- Z M #1! VEN TOR.

ATT RNEYS.

Feb. 27, 1934. PEABQDY 1,948,627

AIR REGISTER FOR FUEL BURNERS Filed April 20, 1951 2 Sheets-Sheet 2 LEFT HAND RlGHT HAND I INVENTOR. 1 W

AT RNEYS.

Patented Feb. 27, 1934 UNITED STATES PATENT OFFICE AIR REGISTER FOR FUEL BURNERS Ernest H. Peabody, New York, N. Y., assignor to Peabody Engineering Corporation, New York, N. Y., a corporation of New York The present invention relates to air registers for fuel burners.

A turbulent condition in a furnace greatly promotes the efiicient and rapid combustion of fuel. l This turbulence or turbulent movement of the gases of combustion may be brought about by imparting to the air admitted with the fuel a rapid rotating motion, and special air registers for accomplishing this are well known in the art. Also it is frequently desirable to use a combination on one furnace of registers which rotate the air in a clockwise direction and those which rotate the air in a counter clockwise direction, as shown in Patent No. 1,508,718 granted to the applicant September 16, 1924 on Apparatus for burning liquid fuel.

Heretofore air registers which rotate the air in a clockwise direction have been provided with operating mechanism which opens the air regis-, zo ter doors by a predetermined movement in a given direction while the registers which rotate the air in a counter clockwise direction open the doors by an opposite movement of the operating mechanism. This requires the special manufacture of right hand or left hand registers and necessitates care and attention on the part of the operator who has to keep track of which registers give a clockwise and which give a counter clockwise rotation of air;

The principal object of the present invention is to provide an operating mechanism which by a movement in a predetermined direction (preferably counter clockwise) will open all registers whether they give a right handor left hand rotation of air, and which will close allregisters by an opposte movement. In this case the operator does not need to even know which registers create an air rotation one way or the other, and his work of adjusting the air for combustion is greatly simplified andmade more efficient.

Another important object of the invention is to construct an air register which by a mere adjustment of parts may be made to give the air a rotation one way or the. other. The fact that all parts are similar, no matter which type of register is required greatly simplifies and cheapens manufacture.

Still another object is to give the designing engineer or operator a ready means for changing the combination of right and left rotational registers on a furnace and by experiment determine the most effective arrangement.

The foregoing and other objects of the invention will be understood by reference to the following description taken in connection accompanying drawings in which Fig. 1 is a central verticalsection; Fig. 2 an enlarged detail section on the same plane. as that of Fig. 1 showing the manner of supporting and the mechanism for operating the register doors; Fig. 3 is an elevation looking in the direction of the arrow in Fig. 1 with the front plate of the register removed and showing all but one of the doors in closed position; Fig, '4 is a view similar to Fig. 3 showing the open door turned in a direction opposite to the position of the open door in Fig. 3; Figs. 5. and 6 are detail views, in elevation at right angles to the doors with the door operating pin engaging its slot in the cam plate and showing the door in closed and open positions, respectively; and Figs. 7 and 8 are views similar to Figs. 5 and 6 showing a door with its operating pin engaging another slot in the cam plate to effect a movement of the door in a direction opposite to that of Figs. 5 and 6. Similar'reference numerals indicate similar parts in the several views. Fig. 9 shows a front elevational view of a portion of a furnace front, the furnace being provided with a plurality of fuel burners and air registers with certain registers arranged to open in one direction and other registers arranged to open in the opposite direction and with the register operating means for each of the various registers moving in the samedirection for effecting opening movement of registers, some of which open in one direction and others of which openin the opposite direction.

Referring to Figs. 1 to 4, the front plate of the register consists of a hollow box-like structure having walls 1 and 2. It may be made up of structural shapes or as a casting, and is hollow to receive a filling of heat insulating material. Wall 1 is formed with an opening closed by a cover plate 3 having itself an opening to receive a hub 4 adapted to receive a fuel burner. cover plate also has an opening. for a peep hole and a rodding hole, as usual in registers of this general type. Wall 2 has a centrally located opening therein, as shown in Figs. 1 and 2. The back plate 5 of the register has an internal diameter greater than the diameter of the openin in the wall 2 of the front plate.

Between the flange 5' of plate 5 and wall 2 of the front plate, are hinge bolts 6. These are threaded at one end into openings in the wall 2, and at the other end pass through flange 5'. The front and back plates are thus held firmly together by the bolts. Pipe sleeves or spacers 7 surround the bolts 6 and are clamped tight against wall 2 of the front plate by the hinge The 9 bolts. The bolts 6 serve as hinges for the doors 8. The number of doors may vary as conditions require. The present register is shown as having eight doors all similar in construction and operating by similar mechanisms, as hereinafter described. The doors 8 are curved sections of a cone and are of such length'that when closed they form a frustumv of a cone, with. their ends overlapping.

The doors 8 are secured at their front ends to the flanges 9 of angle cam plates, the other, flanges 9 of which have an opening ,to receive the lower ends of spacers '7.

To move the doors simultaneously from'closed to open position in either a clockwiseona. counter clockwise direction, according to whether. the: entering air is to be given a. whirling motion in.

a corresponding direction, the flange 9 of each of the cam plates is formed with two slots 1T7" and 18 through which the desired movement of the doors is effected byan operating mechanism.

comprising a shaft 11 onthe inner end' of' which is a pinion 12 which meshes with an internal rack 14- on a ringl l. The latter is held loosely against the section 2 of the wall 2 to permit it to be rotated in a plane'at'right angles to the axis of the register; Rotation of thering is effected manually by a crank handle 15 on' the-outer end of shaft 11.

As shown in Figs. 1 and 2, the outer face of the ring is-bevelled to lieparallel with flange 9 of the camplate. Secured'to' ring 14' and'projecting beyond the plane of its bevelled face are pins 16', one for each door. These pins may be set to engage either the slots 17 or the slots 18. The slots 17 have straight walls, whilesthose of slots 18 are arcs of circles. The opening and closing. of doors is effected in the manner now tobe described.

It will be noted that in the present construction the doors 8' lie outside of the. hinge bolts 6, and that the flanges or'cam plates 9 are at right angles to' and lie inside of the doors; This permits'the use of a sufficiently smallcam plate to prevent interference betweenthe cam plate of one: door and that of the adjacent door.

Operation Assume first that the: doors of a given register are to be opened by moving themiin a clockwise directionso. that the air forcombustion will be caused to rotate in the same direction. The ring 14. is. adjusted to: set all of the pins 16in the extreme lower end of the correspondingv slots 1'7. In such adjustment, the pins will be furthest away from thecenter of rotation of the doors, and the pinion 12 will be at the upper end of the rack 14. The doors must, of course, rotate about the fixed axes of their hinge bolts 6 and as the longitudinal axes'of slot 17 are inclined to the center-of rotation of the doors, the pressure of the pins 16 against the left hand wall of slots 1'7, upon the rotation of ring 14 byturning crank 15 in a counter clockwise direction, will cause the doors to move from their closed position indic'ated in Fig. 5 to open position indicated in Fig. 6. During such rotation of ring 14 the pins 16 will travel along the arcs mm struck from the center of ring-14. As the doors are moved about their axes, slots 1'7 will move from a position above said arcs to a position below them.

To close the doors, crank handle 15 is turned in a. clockwise direction and the return movement of pins 16 along their slots willleffect the desired movement of' the doors. The doors may, of

course, be adjusted to any position intermediate their extreme positions according to the volume and the velocity of the air for combustion desired for any given type of burner.

When the doors are to be opened in a counter clockwise direction so that the air for combustion will be rotated in'the same direction'as the doors are. opened, the. hinge bolts. 6 are unscrewed from their seats in the wall 2 of the front plate sufficiently to allow the doors to be raised to permit the cam plates 9 to clear pins 16. Ring 1% is then shifted to set all of the pins 16 in the extreme right hand end of slots 18, that is, at. the limit of their movement furthest away from the center of rotation of the doors, as indicated, in Fig. .7. In such position the pinion 12 is at the upper. end of the rack 14.

The walls of slots 18 are arcs of circles struck from-a. center eccentric to the axes of the hinge bolts and also to the center of ring 14:, so that when crank handle 15 is turned counter clockwise, that is, in the same direction as when opening the doors to givea clockwise rotation to the combustion air, pins lfi'willbe moved on the arcs n-n.along their slots to the limit of their movement at the other end of the slots, or to any intermediateposition, to effect the desired opening of the. doors. The reverse movement of the crank handle will effect the closing of the doors by a reverse. movement of the pins 15 along the 1 slots.

Ifdesired to open only some of the doors, it is only necessary to remove the pins 16 of those doors which are to remain closed. In thisway only alternate doors may be opened, or any numher from one to the full capacity of the register.

It will be noted. that whether the doors are to be opened in'a clockwise or in a counter clockwise direction, crank handle 15 is always manually operated in acounter clockwise direction. This avoids confusion on thexpart of the operator as towhichiway the handle is tobe turned as was frequently the case when the doors were capable of movement in one direction only. Ac-

cording to the present construction, in whichever l of the slots the pins 16 are set, the operator knows that thehandle 15 is always to be turned in a counter clockwise direction to effect the opening of the doors;

The described construction also enables the desired adjustment: to be made, or to be changed registers are similar in construction and thus avoids the necessity of fabricating more than one type.

In Fig. 9 the direction of the opening movement of the various registers is shown by the outer arrows and the direction of opening movement of the operating means for the registers is shown by the inner arrows' The registers are shown'in wide open position. To close the registers the operating means would be moved in reverse direction to the direction in which the y] The direction of closing inner arrows point. movement of the registers would be the reverse of the direction indicated by the outer arrows. It will be noted that some of the outer arrows point in one direction and some point in the opposite direction, while all of the inner arrows point in the same direction.

What I claim is:

1. In combination with a furnace, a plurality of fluent fuel burners, an air register for each burner, each register having adjustable doors for controlling the volume and the direction of rotation of air currents fed to its burner, the doors of some of the registers being arranged to rotate the air currents in one direction and the doors of the rest of the registers being arranged to rotate the air currents in the opposite direction, operating means at each register to move the doors of such register, all of said operating means being movable in the same pre-determined direction to open and in the opposite direction to close the doors of all registers.

2. An air register for controlling the volume and the direction of rotation of air fed, comprising an annular series of pivotally mounted doors constructed to be optionally assembled for either clockwise or counterclockwise opening movement, means for operating said doors comprising an operating member and means to connect said operating member to said doors so constructed that said operating member moves in the same direction in opening said doors whether the doors are assembled for clockwise or counterclockwise opening movement.

3. The invention set forth in claim 2 in which the means to connect the operating member to the doors comprises selectively inter-engageable means intermediate the operating member and the doors arranged for selective relation to the doors according to whether the doors are assembled for clockwise opening movement or counterclockwise opening movement.

4. The invention set forth in claim 2 in which the means to connect the operating member to the doors comprises multiple cams secured to each of the doors, and means selectively engageable with said multiple cams.

5. An air register for controlling the volume j and direction of air fed, comprising an annular series of pivotally mounted doors constructed to be optionally assembled for either clockwise or counterclockwise opening movement in combination with operating apparatus for said doors, comprising multiple cams secured to each of said doors, one cam being at an angle to the other cam on each door and both cams being eccentric to the axis of rotation of an associated door, and operating means engageable with one or the other of said sets of cams and when related with one set arranged to effect opening movement of doors assembled for clockwise opening movement and when related with the other set arranged to effect 7 opening movement of doors which are assembled for counterclockwise opening movement, said operating means and said cams being so constructed and interconnected with said operating means moves in the same direction in opening said doors whether the doors are assembled for clockwise or counterclockwise opening movement.

6. Operating apparatus applicable to an air register having doors constructed to be optionally assembled for either clockwise or counterclockwise opening movement, said operating apparatus comprising an operating means movable always in the same direction for opening the doors irrespective of whether the doors are open clockwise or counterclockwise, and connections therefrom to the doors to be opened to selectively impart a clockwise opening movement to doors assembled or clockwise opening movement or to impart a counterclockwise movement to doors assembled for counterclockwise opening movement, said connections including means so that the operating means moves in the same direction in opening said doors whether the doors so assembled are for clockwise or counterclockwise opening movement.

'7. Operating apparatus applicable to an air register having doors constructed to be assembled for either clockwise or counterclockwise opening movement, said operating apparatus comprising a cam member associated with each door and provided with multiple carnming surfaces, one surface being adapted for use for doors assembled to open with a clockwise opening movement and the other surface being adapted for doors assembled to open with a counterclockwise rotational movement, and a common operating member with provisions for selective association with either of the sets of carnming surfacesaccording to the desired direction of opening movement to be imparted to a set of doors, said opening means and carnming surfaces being so related that the operating member moves in the same direction in opening said doors Where the doors are assembled for clockwise or counterclockwise opening movement and upon the associating of the operating member with one or the other sets of carnming surfaces.

' ERNEST H. PEABODY.

CERTIFICATE OF GORREGTEONQ Patent No. 1,948, 627. February 27, 1934.

ERNEST H. PEAifiDY.

It hereby certified that error appears in the prinieti seeeiiieation of the above numbered patent requiring eorreetien as fellows: iage 3, line 83, claim 5, ier "with" read that; and that the said Letters Patent should he read with this correction therein that the same may conform to the record 01 the case in the Patent Office.

Signed and sealed this 20th day of March, A. D. i934.

F. M. Hopkins (Seal) Acting Commissiener of Patents.

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