US2413710A - Spraying apparatus - Google Patents

Description

Jan. 7, 1947. J, P, JASON SPRAYING APPARATUS Filed Dec. 11, 1943 2 Sheets-Sheet 1 Jan. 7, 1947. J. P. JASON 2,413,710 v SPRAYING APPARATUS Filed Dec. 11, 1943 B'Sheets-Sheet 2 Gif/a@ Patentecl Jan. 7, 1,947

-SPRAYING APPARATUS John P. Jason, Chicago, Ill., assigner, by mesne assignments, to Sprayer- Corporation of America, Chicago, Ill., a corporation of Illinois Application December 11, 1943, Serial No. 513,889

, 1 Claim.

'I'his invention relates to novel improvements inthe construction of a hand portable apparatus adapted to spray liquids such as insecticides, fumigants, deodorants and the like, by compressor action in the form -of a iine mist.

In general the apparatus to which the improvements of thepresent invention relate comprises a unit composed of an encased motor, a separable liquid container and an intermediate compressor all axially arranged.

It is an object of the present invention to provide such apparatus in a more compact construction of reduced height. This is in part accomplished by providing a. telescopic construction wherein the compressor extends within the liquid container. In addition to the advantage of reduction in height and the lowering of the center of gravity of the unit which makes it easier to y and stability when left standing alone on the container bottom for such uses as spraying or fumigating a room, the improved construction has the added advantage in that any oozings or leakage can run back into the liquid container instead of exteriorly thereof as was the case in former constructions.

Another object relates to the adjustable construction of the defining wall or sleeve of the compressor whereby it may be adjusted laterallyv to take up wear and provide the desired degree of eccentricity so as to enable the device to be operated with a maximum eillciency at all times.

Another object relates to the noveland improved form of spray nozzle with which my unit is provided whereby the direction of the issuing spray may be quickly and conveniently regulated bythe provision of a rotatable head provided with a plurality of passages.

Another object relatesv to novel details of construction making provision for the picking up of oozings along the compressor shaft and for returning them to the compressor fluid intake.

Another object relates to the provision of float mechanism adapted to break the electrical circuit of the device to stop the operation thereof when the fluid in the container has been used up so as to avoid wear of the partsv due to lack of lubrication by the fluid employed for spraying.

Other objects relate to added details of construction and arrangement of parts which will be apparent from a consideration of the following specification and drawings, wherein:

Fig. 1 is an elevation largely in central vertical section, with parts broken away, illustrating an improved sprayer unit in accordance with the present invention.

Fig. 2 is a section viewed on the line 2-2 of Fig. 1.

Fig. 3 is a section viewed on the line 3--3 of Fis. 1.

` handle and particularly gives it added security .2 Fig. 4 is a longitudinal section of the novel spray nozzle.

Fig. 5 is a front elevation of a spray nozzle illustrated in Fig. 4.

Fig. 6 is a schematic wiring diagram for aotua- I tion and control of the unit.

Referring to the drawings, the 'reference numeral I 0 generally indicates a motorenclosed in a dome-like casing I I', the open end of the casing being closed by the'tting generally indicated as I2 and secured thereto by means'of screws as at I3. One end of the motor shaft I4 is journalled in the head of the casing II by means of the bearing I5,`and the opposed end portion by means of the bearing I6 in the fitting I2. The shaft I4 projects through the bearing I6 and has flxedly secured to its end portion the compressor rotor I1. 1 The fitting I2 is provided with a downwardly extending integral threaded annular flange I8., which vis substantially an extension of the motor casing II, and is adapted to threadably engage the complementary threaded neck I9 of the container 20, The body of the container is of rela; tively enlarged diameter and has a at bottom so as to permit the unit as a whole to rest thereon.

The compressor comprises a rotor Il provided with conventional vanes 2| slidably positioned in the rotor slots 22 and movable outwardly under centrifugal action, a separable side wall or sleeve 23 and the bottom cover or holder plate 29. 'I'he sleeve 23 which forms the rotor chamber is mounted in eccentric relation to the rotor I1 as is well understood in compressors of the type illustrated, but instead of being in fixed relation-l ship as is conventional, I provide means for lateral adjustment of the sleeve 23 with respect to the rotor I1. This permits not only desired initial adjustment of degree of eccentricity and clearance of the two parts, but also permits adjustment to correct such desired eccentricity and clearance upon wear of the internal facing of the sleeve 23, with attendant increase in life of the compressor and the ability to conveniently maintain it at high efciency at all times.

Such adjustability is accomplished by providing the sleeve 23 with a plurality of lateral ears 24 formed with apertures 25 to receive the.

screws 26 which extend into the fitting I2, the diameter of the apertures being larger than the diameters of the screws, as illustrated inFig. 3

wherein one of the holding screws is removed.v

Thus, by loosening the screws 26, the sleeve 23 may be finely adjusted with respect to the rotor plate 29 provided with a plurality of lateral ears 21 through which extend screws 28 into engagement with the fitting I2, the fitting I2 thus pro- 'with duct 30. The duct 30 is preferably formed with an intermediate annular seat 34 adjacent the orifice of the fluid introduction tube 3,5, which extends through the fitting l2 into communication with the duct 30, the said seat 34 prof viding an abutment for a complementary intermediate shouldered portion of the nipple 3| and whereby complete closure of the orifice of tube 35 is' prevented, thenipple` 3| being `otherwise adjustable with respect to the orifice of tube 35 so as to enable regulation of the amount of liquid introduced into the compressor from the `contain- 1 er 20. If desired a spring 36 may be seated within the duct 30 to bear against the reduced terminal end of the nipple 3|, as illustrated, to prevent displacement of the predetermined adjustment of the nipple due to vibration of the unit in operation.

The tting |2 is provided with a second radial duct 31 to which is threadably engaged the nozzle body 38 provided with the axial bore generally indicated as 39, the duct 31 communicating with the compressor through the air and vapor exhaust duct 40. The nozzle body 38 is provided with a spray tip 4|, the tip being flanged as at 42 and held in rotatable engagement with the body 38 by means of the flanged nut/ 43 threadably engaged to the body 38. The bore 39 adjacent its outer end terminates in a plurality of branched conduits such as the axially offset parallel branch 39v and the 45 inclined branch 39".- The spray tip 4| is provided with holes 4| and 4|" adapted to register with the conduit abranches 39 and 39" respectively but not simultaneously. That is, when the openings 39 and 4|' are aligned a horizontal spray is permitted to issue, but the openings 39" and 4|" are at an angle of 120 from each other and out of cornmunication. Conversely by rotating the tip l4| for 120 the openings 39 and 4|" are brought into register to cause a' spray to be emitted at an angle, with the openings 39' and 4| out of alignment and communication. Although only two sets of openings are shown in the illustration of Fig. 4, it will be understood that additional portsm-ay be provided to individually register in the same manner. To aid in the prevention of leakage a gasket 44 may be interposed 4between the nozzle body and spray tip, suitably apertured for closing off openings sothat only one passage of the nozzle is open at any one time. After the ports are set to spray at the selected angle they are held in position by tightening lock nut 43.

For the purpose of preventing oozing of liquid from the compressor upwardly along compressormotor shaft |4 during operation of the device, I

'provide thev bearing i6 with an annular groove 45 which is connected through the duct 46, which extends through the bearing |6 and fitting I2, to the duct 30, and thus permits any liquid which is forced upwardly along .the shaft to be returned tothe compressor through the air-liquid intake duct 33.

The unit is provided with a, handle, generally indicated as 41 secured to the motor casing to permit the device to be operated while held in the hand, and when so held may be actuated by depression of the trigger switch 48 connected into the line 49. 'I'he spraying device is also conventionally employed by placing it on a suitable support such as a shelf or table within, for example, a room which is to be sprayed with insecticide, and for such purpose a conventional timer switch mechanism, such as that described in United States Patent No. 1,990,165, and generallyindicated as 50 is provided in handle 41, and connected in line 49 in parallel with trigger switch 48. By setting the timer switch the sprayer' may be actuated for a predetermined length of time, within the limits of the mechanism, without requiring the presence of the operator.

However, when the device is set for operation by means of the time switch 50 the possibility valways exists that the liquid in container 28 will become exhausted 'before the switch 50 opens, due either to a too high rate of flow of the uid or too long a time setting in proportion to the amount of liquid ln the container, and in the absence of the operator, continued actuation of the device after exhaustion o f the liquid will cause undue wear of the compressor parts due to lack of lubrication by the liquid. In order to prevent such occurrence I provide the container 28 with a float 5|, the rod 52 of which extends and reciprocates through a suitable aperture in the fitting |2 to terminate within the motor casing adjacent the contiguous portion of the handle 41 and the timer switch 50 thereof. The

upper end of rod 52between its setting stop 53 and its breaker stop 54, extends freely through the end of a lever 55 pivoted at 55, for actuation of the micro switch, diagrammatically indicated as 51, and vconnected in series with the time switch 50. It will be understood that, although not illustrated, switch 51 may in the alternative be a mercury or mercoid switch actuated bytilting of the lever 55. Thus; when the container 20 is filled with liquid, stop 54 onfioat rod 52 rises to tilt lever 55'to a position where it closes switch 51,'and if the timer switch 50 is also closed by setting for a predetermined lperiod of oper- Aation, the rdevice will continue to operate until either switch 5U opens at the end of its set time or until the liquid in/the container has reached a level where the rod 52 has become lowered to an extent where its stop 53 depresses lever 55 sufficiently to open switch 51, whichever occurs first, and thus actuation of the sprayer device and wear of the compressor parts prevented in l the absence ef sufficient liquid in the container,

when the device is operated by means of the timer switch.

I claim as my invention:

A hand portable, compact, unitary liquid spraying device of the class described comprising a liquid container having a threaded top opening, a partitioning member threaded onto said threaded openingv in said container to provide a cover therefor, said partitioning member having

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