US2271690A - Oil burner accessory - Google Patents

Description

Feb. 3, I J GOFFREDO OIL BURNER ACCESSORY Filed July '7, 1959 burner. The c when the'burner is reiterar-Feb'. 3,1942

2 Claims.

Application July 7, 1939, serial No. 283,265

This invention relates to `improvements in oil burners, a particular purpose being to provide an accessory 'which will increase the efficiency of the furnace w ch l-is supplemented by the oil Naturally this is necessary for the influx of air while the burner is in operation, but it becomes a tomary types of oil burners have` air openings which are perpetually uncovered.

serious disadvantage when the burner is dormant.

At that time said openings constitute parts of a direct air passage from the basement or other furnace room, through the oil burner and furnace to the chimney, resulting in a premature chilling of the hot surfaces of the furnace which is herein desired to be avoided. Thus, thevunderlying purpose of the invention is to close oifthe furnace dormant and so avoid the ob- Jection noted.` With this preamble in mind the objects of the invention are:

First, to provide an accessory for an-oil burner the primary purpose of which isV to eliminate a high percentage of-the cold air draft ordinarily flowing through the burner and furnace whenthe burner is idle, the stopping of said draft preventing the premature chilling of the furnace.

Second, to provide an accessory for the purpose stated, which in effect comprises an auxiliary air inlet the function of which is to automatically open `and close the air opening when the burner respectively starts and stops. v 4

Third, to provide an accessory which is capable of being vmade in several types to suit different models of oil burners and this without affecting the working principles of the device.

Fourth, to provide an accessory which is ready applied to and removed from an oil burner, neither interferring with its operation nor with v its repair when the latter becomes necessary.

Other objects and advantages will appear in the following speciiication reference being had to the accompanying drawing in which Figure l is a side elevation of apart of an oil burner showing the accessory applied thereto.

Figure 2 is a vertical section taken. on theline 2 2 of Figure 1. v

Figure 3 is a detail cross section taken on the line 3-3 of Figure 2.

Figure 4 is a partially sectional and side elevational view of a modified type of accessory for the oil burner.

Figure 5 is a section taken on the line 5-5 of Figure 4, parts being shown in elevation.

In carrying out the invention it is a general -principle in most of the types to provide a casing with which the oil burner-housing is supple-issy This Iarrangement of mented, said casing comprising an anteroom, so

to speak, to the oil burner, and providing for the control of the air draft through the oil burner. Invthe drawing the oil burner is generally designated I, said burner including a blower 2 which has a housing 3. 'I'his housing has at least one air opening 4. In. actual practice there are several air openings, but regardless ofthe number of openings or wherethey are situated it is the purpose of the invention to provide a casing 5 to cover said openings, the latter being adapted to be opened only when the blower 2 is in operation. In Figures 1, 2 and 3 the casing 5 comprises a hollow formation with parallel side walls 6 which are connected by a curved wall 'I on back and a much Italler but also curved wall 8 on' front. walls defines what herein appears and is showngas a hood 9.

The casing 5, has flanges I0 which rest on the housing 3 to provide the needed support. 'Ihe casing includes a clamp piece II which is suitably attached at I2 and has securing means at I3. 'I'he arrangement of the clamp piece and securing means I3 permits the easy application and removal of the casing 5 from the housing 3.

'I'he previously mentioned curved walls 1, 8 are connected by an u pright wall Il. This wall leans backward so as to stand at a slight pitch in reference to a vertical plane. An air entrance I5 in sai'd wall is controlled by' a doorv I6 which is hinged at I1 at the top of the opening. Said door is adapted to gravitate to a normally closed position. 'I'he closure of said door is perfected by having the wall I4 stand at a slight pitch, and if needed, said door is supplemented with a weight I8 which insures the closure. Said door is automatically drawn open approximately to the dotted line position (Fig. 2) by the starting up and continued operation 2. When the latter ceases operation the door Il closes automatically.

One or more vents I8 are provided in the casing. Each vent is adapted to be closed by a voted plate 20. These vents are adapted to be y opened as shown in Figure 2 only when fumes in the basement are desired to be drawn olf through the housing 5 and furnace to the chimney. It happens some times that a loose con-v nection of the burner' v to the furnace will -permit a slight discharge of fumes into the basement v upon the starting up. These can be drawnoil' by means ofthe vents I9.

Figures 4 and 5 illustrate an extension of the foregoing principles of the burner blower' wherein the casing 5 has a wall 2| built out therefrom so as to stand at a has a link connection 428 to the door 23.y

entrance is/controlled by a hinged door 23.V A Said door is adapted to close 'by gravity, but rather than to depend onv the oil burner blower for its opening said door has mechanical connections to a solenoid 24: f

' Thecore. 25 of the latter has a link connection 26 to a' pivoted rocker 21. Said rocker, in t'in e e'nergization of the solenoid causes the opening of the door. Saidsolenoid is adapted to be connected to a suitable. control circuit of the oil burner. Upon de-energization of the solenoid the closing of'the door 23 is desirably retarded by a dash pot arrangement 29. This arrangement is connected between the casingi and the door. It is observed in Figure that the casing 5 is generally rectangular in shape, and that it has shoulder portions 30 where it joins the cylindricalA part 3| that is applied to the housing 3. Said shoulder portions also have air entrances 32 which are adapted to be normally closed by trap doors 33. Thefse doors are hinged at 34 and weighted at 35. The angle at which the doors are disposed supplemented by the weights 35 insure keeping said doors -closed under all circumstances excepting a. heavy initial draft. If the door 23 should happen to stick and thus open the entrance 22 insufficiently far to supply the oil -burner then the doors 33 will open and thus prevent stalling the oil burner.

acuoso prising a casing, an upstanding hood on'the casover, electromagnetic door-operating means mounted on the hood, said means having a movable core, a rocker pivoted on the hood and having one end connected to the core, a link connecting the other end of the rocker to the door for opening the door by energization oi. the electromagnetic means, and a dash pot device coupled between the door and hood, being operative upon deenergizations of said electromagnetic means for delaying the action of the door when gravitating from its open position.

2. An accessory of the character described consisting of a casing, means for securing the casing to a housing in spaced away relationship to an opening therein to denne an air passage leading to said opening, an upstanding hood on the casing, said hood having an upright wall built out therefrom and standing at a pitch from the vertical plane with respect to thehood, said wall having an air opening therethrough, a hinged door having rockable links attached thereto,

electromagnetic means for rocking the links, and

a dash pot attached between the wall and the door for slowing up the door when it is being closed.

JOHN GOFFREDO.

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