SePt- 17,1946- K. c. WHITEFIELD 2,407,358 ‘AIR TRANSLATING APPARATUS Filed Sept. 8, 1944 ’ 2 Sheets-Sheet l 28 FIG. i. 12 12 “L 3F 14\ 'u': \ 1 i0 34 34 30 30 34 >WITNESSES: . 77 Lat . ‘e ‘61mg. 34 ' ' 52 F's" 3' '_ 28 'INVENTOIR . 'KYLE-QWm-rEF-IELD. . “742/. ATTORNEY ‘ 'Sept. 17, 1946. K; c. WHITEFIELD. 2,407,858 AIR TRANSLATING APPARATUS Filed Sept. 8, 1944 2 Sheets-Sheet 2 / H2 70 68. 72 / F'IG.5. WITNEZSSEVS: 0% INVENTOR KYLE C.WH|TE.F'IE.LD. KORNEY Patented Sept.v 127, 1946 21,407,858 ‘ UNITED STATES PATENT OFFICE AIR TRAN SLATING APPARATUS Kyle C. White?eld, Longmeadow, Mass, assignor to Westinghouse Electric Corporation, East Pittsburgh, Pa., a corporation of Pennsylvania Application September 8, 1944, Serial ‘No.“553,177 a 2 Claims. 1 (Cl. 98-94) My invention relates to air translating appa ratus, and more particularly, to an improved two-fan installation adapted to deliver air to, ex cabinet are secured to the adjacent ends of the ?ller pieces by any suitable means such as angles haust air from or recircula-te air in a room or The ?lter 36 is preferably detachably mounted in position. As shown, the ?lter is slidable in channels formed between blocks or the like 48, other enclosure. An object of the invention is to produce an im proved apparatus of the type set forth. ’ A further object of the invention is to produce an improved two-fan installation by meansyoi" Which admission of air into, withdrawal of, air from, and recirculation of air in, a room may be effectively directed with reference to different portions of said room. _ A still further object is to provide improved control means whereby operation of said fans may be selectively controlled by a single, easily operated switch. M and screws 46. , projecting from the inner faces of the side walls 30 of the cabinet, and the juxtaposed portions oi the angles 44, as clearly shown in Fig. 2. The front wall 28 is providedon its inner side with a pad 50 for supporting a control knob 52, having an index or pointer Stand a dial 56 hav ing, marked-oil positions 58, for indicating var ious modes of operation of the fans 20 and 22 in ' conjunction with the control mechanism dia grammatically shown in Fig. 5, In order to be able to direct the ?ow of air to, These and other objects are effected by my in or from, different portions of the room, the fans vention as will be apparent from the following are set at an angle to each other, as shown in description and claims taken in connection with 20 Figs. 2, 3 and 4. This angular setting of the fans the accompanying drawings, forming a part of enables them to deliver outside air to opposite this application, in which: portions of the room, as shown by the arrows in Fig, 1 is a perspective view showing a two-fan Fig. 2, to exhaust room air from opposite por installation embodying my invention mounted on tions of the room, as shown by the arrows in Fig. the bottom sill of a window; 3, or to recirculate room air in one direction, as Fig. 2 is a section on line II—-II of Fig. 1, show shown by the solid‘line arrows in Fig. 4, or to re ing the fans delivering air to the room; circulate room air in another direction, as shown Fig. 3 is a fragmentary view similar to Fig. 2, by the broken linearrows in Fig. 4. ' showing the fans exhausting air from the room; The fans 20 and 22 are driven by single phase Fig. 4 is a view similar to Fig. 2, showing the 30 capacitor motors M1 and M2 which are selective .fans recirculating air in the room; and ly operated by the control knob 52. The motor Fig. 5 is a diagrammatic view showing the im M1 includes a rotor 60, and a ?eld winding formed proved switch and control circuit for selectively of two parts 62 and 64 which are connected to an effecting the various operations of the fans. . electric lead line L1 by a. wire 66, and to opposite In the drawings, there is shown a two-fan in sides of a capacitor 68 by wires 10 and 12. The stallation embodying my invention and mounted motor M2 also includes a rotor 14 and a ?eld on the bottom sill H3 of a conventional‘ window winding formed of two parts 76 and 78 which are having side J'ambs l2 provided with grooves l4 connected to the lead line L1 by a wire 80, and to and It in which are slidably mounted the usual opposite sides of a capacitor 82 by wires 86 and window sashes, one of which is shown at IS. 88. As is well known, the direction. of rotation of The fan installation includes a pair of fans 20 a motor of this type maybe reversed by connect~ and 22 enclosed within an attractive cabinet ingone part of the ?eld winding or the other in formed of top and bottom walls 24 and 26, a front series ‘with the capacitor. wall 28 and side walls 30. The junctions of the In order to selectively control the operation side walls 30 with the front wall 28 are prefer of either or both of the fans, I provide a'single ably rollnded and provided with louvered open control switch which is diagrammatically shown ings 34. The outer end of the cabinet registers in Fig. 5 and which includes contact segments with the window opening and is either entirely 92, 93, 94, 95 and 96 and a switch or contact arm unobstructed or ?tted with a removable ?lter 36. 98 connected to lead line L2 and adapted to be The spaces on either side of the cabinet hous 50 rotated by the knob 52 into selective engage ing the fans are closed by ?ller pieces 33 which ment with any one or any two of the contact may be opaque, translucent or transparent. The segments to energize or deenergize, or to reverse ?ller pieces are secured to the window frame by the direction of rotation of, either or both of the any suitable means, such as straps or brackets 40 fans. The switch also includes an “01f” position and screws 42. Likewise, the Side Walls of the I88 to which the arm 98 may be moved When it 2,407,858 ' 3 is desired to shut the power off from both of the motors. In order to be able to run the motor M1 in either direction, it is connected by a wire I04 to > the contact 96 and by a wire I06 to the contact 5 94. Therefore, when the circuit is completed through contact 96, the current in the winding 64 will be in phase, and the current in the'wind ing 62, being in series with the capacitor 68, will be out of phase. The current in the winding 62 will, therefore, “lead” and the motor M1 will run in one direction, which for this purpose may 4 the contacts 92 and 93 and in which the motor M1 will run forward and motor M2 will run back ward, as illustrated by the broken line arrows in Fig. 4. By the arrangement above described, it is pos sible to introduce outside air and to direct such air to either or both of different parts of the room. It is also possible to Withdraw air from one or another part of a room, or to withdraw air from both parts of the room simultaneously. Air may also be recirculated within the room by causing one of the fans to withdraw air from, and the‘ other of the fans to propel air into, the be termed the forward direction. When the cir room. cuit is completed through the contact 94, the re The ?lter 36 is made readily removable so that verse condition prevails and the motor will run 15 it may be easily removed, ifdesired, when the in the oppositev direction or backward. ‘ It will fans are used for exhausting room air. be noted that the contacts 92 and. 96 arefbridged It will be seen that by merely moving the knob by a wire I08 so that the motor Ml will run for 52 to positions on the dial 58 which are marked ward whenever the circuit is closed through 'ei 20 with indicia, corresponding to positions A to F, ther of these contacts. inclusive, the operator can selectively control the The motor M2. is connected to the contact 95 operation of the fans to produce any of the ef by a wire I I9 and to the contact 93 by a wire fects hereinabove set forth. The fans 29 and 22 H2 so that, if the circuit is completed through may be ?xedly mounted in the positions shown, the contact 95, the motor M2 will run in a for ward direction, and if the circuit is completed 25 or they may be adjustably mounted so as to vary their angular relationship and the direction of through the contact 93 the motor will run inthe movement of the air propelled by either or both reverse direction, as explained in connection with of said fans. motor M1. - While I have shown my invention in but one Operation. form, it will be obvious to those skilled in the art When it is desired to cause the fan 20, for 80 that it is not so limited, but is susceptible of vari example,’ to deliver outside air to the room, the ous changes and modi?cations without depart motor IV!1 of this fan is energized by moving the arm 98 from the “off” position to position A in ing from the spirit thereof. ' What I claim is: ,1. In a device for ventilating a room or other When it is 35 enclosure, a cabinet having a pair of air flow which it contacts the segment 92 only and in which the motor will run forward. desired to cause the. fan 20 to withdraw air from openings communicating with said room and at the room, the arm 98 is moved to position B in least one opening leading from said cabinet to which it engages the contact“ only. This re a space outside of said room, a fan mounted for verses the direction of operation of motor M1. 40 moving air through one of said room openings, The same result can be obtained with reference another fan mounted for moving air through to the fan 22 by moving the switch arm to posi the other of said room openings, a reversible tion. A’ or B’ to energize the motor M2 through motor for each of said fans and a single switch the contact 95 or 93, respectively. means movable into one position in which both When itis desired to cause both of the fans 4 of said fans Withdraw air from said room and 9 to deliver-outside air to the room, as shown in Fig. 2, the switch arm is moved ,to position C, in which it engages contacts 96 and 95 which are connected to the corresponding sides of the mo tor M1 and M2, so that both of the motors will 50 run. forward. To cause both of the fans to with draw air from the room, the switch arm is moved discharge it through said outside opening, into a second position in which both fans draw air through said outside opening and discharge it into said room through said room openings, and into a third position in which one of said fans draws room air through one of said room open ings and the other of said fans propels said air toposition D, in which it engages contacts 93 v- into the room through the other of said room and 94 to reverse the. operation of both motors. openings. When it is desired to recirculate the room air, 55 2. The structure recited in claim 1 in which it is necessary to have the fans running in op said room openings are disposed in different posite directions. To accomplish this, the switch planes and in which the axis of rotation of each arm may be movedto position E, in which it en of said‘fans is substantially normal to the plane gages contacts 94 and 95 so that the motor M1 of its respective opening, the axes of rotation of will run backward while motor M2 runs forward. 60 said shafts being at substantially right angles This condition is illustrated by the solid lines in to each other. Fig. 4. To reverse this condition, the switch arm KYLE C. WHITEFIELD. may be moved to position F, in which it engages .