US 1690974 A
Description (OCR text may contain errors)
Nov. 6, 1928. 1,690,974
L 'G.'E. HAZARD ETAL WASHING MACHINE Filed Feb 1922 Patented Nov. 6, 1928.
UNITED STATES "PATENT OFFICE.
GEORGE EDGAR HAZARD AND HARRY IF. BOE, OF ROCHESTER, NEW YORK.
Application filed February 2, 1922. Serial No. 533,678.
This invention relates to washing-machines of the type in which dishes, or other articles, are washed by discharging liquid spraysor jets against them, within a casing in which they are supported by suitable foraminous or basket-like means.
'One object of the invention is to improve machines of the type in question, with respect to the form and arrangement of the work-supporting means and the spray-devices, so as to secure the most efiicient and complete action of the spray, SIOIlSlStGIltlLY with simplicity and convenience in the parts in question. Another object of the invention is to improve the means by which the washing-fluid is strained in the course of its circulatory movement in the machine; and a th rd object is to provide simple and effective means for venting the machine in such a manner as to permit the discharge of air and vapor while preventing the escape of washing-fluid.
To the foregoing ends the invention resides in the several novel features of construction hereinafter pointed out in connection with the description of the preferred embodiment of the invention. V
In the accompanying drawings Fig. 1 is-a side-elevation, partly in section, of a dishwashing machine embodying the present invention. Fig. 2 is a schematic plan-view of the spray-pipes, with some of the pipes shown in section. Fig. 3 is a vertical sectional view of one of the spray-pipes; and
Fig. 4: is a plan-view of the strainer.
The inventionis illustrated as embodied in a dish-washing machine, provided with a sheet-metal casing 5, of generally cylindrical form, this casing being open at the top and being supported on legs 6. A cover 7 is removably applied to the top of thecasing to close it when the machine is in use.
The machine washes the dishes by subjecting'them to sprays of water, the water being continuously circulated in the machine. An electric motor 8, mounted below the casing, furnishes the power for this purpose, and drives a centrifugal pump 9 of any ordinary or suitable form. The water is drawn from an outlet-opening in the bottom of the casing, through a strainer by which all solid particles, likely to clog the pump or the sprayorifices, are retained. This strainer, and the passage leading to it, have a novel form which constitutes a feature of the invention. The strainer has the form of a downwardly expanding foraminous conical member 11.. The water enters the strainer through the passage formed by a downwardly tapering conical member 10 and emerges through the perforations in the strainer. The tapering forms of these parts are such as to facilitate the motion of the water, while at the same time tending to prevent clogging of the strainer. The stream of water is concentrated and its speed increased by the member 10, and the solid particles therein tend, owing to gravity and their momentum, to be projected downwardly through the strainer 11 t0 the open lower end thereof, so that they may be separated from the water without being forced against and into the perforations in the strainer. ,7
The spray-device is revoluble, and it com prises a hollow branched body 12 which is pivoted on a post 13 rising from'the bottom ofthe machine. The pump discharges into thebody 12, and the water then passes into four hollow arms or pipes 14 radiating from the body. The pipes 14 extend outwardly near the bottom of the casing, and are then curved upwardly close to the wall of the easing, and terminate in four separable portions 15, 16, 17 and 18 respectively, which are provided with spray-orifices 19 from which the water is discharged. against the dishes ,The orifices 19 are so formed as to project horizontal fan-like jets of water, and means are provided for supporting dishes within the space around which the spray-pipes revolve, and thus within the paths of these jets. For this purpose a lower basket-like member is formed of heavy wires, including upright wires 20 which are bent outwardly at their upper ends and fixed to a ring 21. This ring rests looselyon a ledge QQfOIIIlQd in the wall of the casing. and by means of handles 23 the lower support may be lifted as a whole from. the casing or replaced therein, for convenience in handling the dishes. lVhen the support is in place, however, an annular space for the rei'olutionof the spray-pipes is provided by the form of the members 20, while the support depends into the space between the spray-pipes in such a manner that dishes therein may be subjected most effectively to the jets from the orifices 19. p
In addition to the lower supportjust described, there is an upper basket-1i (e sup ort located entirely above the spray-pipes. his upper support is also formed of wires, and
comprises a base-ring 25 which rests normally on the ring 21. The wires of the upper support are so formed that the bottom of the support comprises several oppositely inclined portions of generally-conical form, as clearly shown in Fig. 1, the illustrated device comprising, at the periphery, a downwardly and inwar ly inclined part 28, inside of which is a part 29 upwardly and inwardly inclined at a steeper angle, while the middle part 30- tween which the water is discharged in fanlikejets through wide angles in vertical radial planes, as indicated by dot-and-dash lines radiating from the pipe 16 in Fig. 1. An article such as a tumbler may be placed .in the'upper support in several different positions, in each of which the water will be so discharged into it as to reach the bottom of its inner surface directly. Thus, if placed on its side on the part 28, with its top resting against the part 29, the vessel will be held at such an angle that water discharged in the direction of the line 32 will pass across the diameter of the casing and enterv the mouth of the vessel. If the vessel be placed with its mouth resting on the part 28 of the support, water discharged in the direction of the line 31 will enter its mouth. A vessel resting with its mouth on the part 30 will receive water in the direction of the line 33. The upper support is provided with handles 26 by which it may be removed and replaced.
When hot water is'introduced into the casing, with the cover 7 closed, the air therein is expanded, and air and vapor tend to escape. To permit this to occur without the discharge, of water, the cover is provided with vent-openings so arranged as to baffle water while permitting free passage of air. For this purpose a downwardly-convex sheet-metal member 34 is secured to the downwardly-concave middle of the cover, and into the space so enclosed the air may enter through a perforation 35 in the part 34, while the air may escape through openings 36 in the cover. Any drops of water carried by the air will be arrested in the enclosed space, and will drain back into the casin The general arrangement of the casing, the strainer and the pump are similar to that disclosed in our pending application for Letters Patent of the United States, Serial No. 384,77 9 filed May 27 1920. The strainer is enclosed in a housing 37, which it fits close 1y at its lower end, and the bottom of thisthe upper surfaces housing forms a settling-chamber 40. in which solid matter may collect. From the housing both the solid matter and the water may be drained, when necessary, through a pipe 41 controlled by a valve 42 of any ordinary or'suitable form. The strainer and the member 10 are combined in one removable assembly to facilitate cleaning, the
and this plate also servesas a handle by which the strainer assembly may be conveniently removed.
It should be noted that the strainer, when in place, constitutes a' discharge-passage through which the liquid contents of the machine may be drained after completion of the washing operation. When the liquid is so drained it 'tends to flush away from the surface of the strainer any solid matter which has been deposited thereon in the performance of its normal function.
The revolution of the spray-pipes may be -caused in any convenient manner, but in the illustrated machine the reaction of the water is utilized for this purpose. Fig. 2 shows, diagrammatically the arrangement of ,the spray-pipes, and as shown therein the pipes 16 and 18 are arranged to project the water from the orifices 19 at opposite inclinations, so to produce reaction which causes revolution of the spray-device in the direction of the large arrow in Fig. 2. The orifices 19in the pipe 15 are directed radially inward. The orifices 19 in the pipe 17 are directed at a slight angle in the direction of revolution, as this has been found to promote the thorough subjection of the dishes to sprays from all directions.
Since the upper surfaces of the dishes in the upper support are not subject to the direct action of any of the sprays or jets, provision is made for subjectingthem to the action of water dripping or rebounding from the cover 7 of the machine. For this purpose the spray-pipe 15 is provided with a discharge-opening, at its upper end, shaped to discharge a fan-like jet of water close to and parallel with thewall of the casing. This jet passes through the upper work-support near its periphery, at a point where it is likely to be relatively unencumbered with dishes, and impinges on the lower surface of the cover 7. Owing to the conical form of the cover, the water is deflected somewhat inwardly and then rebounds or drips upon of the articles on the upper support.
For the admission of Water to the machine, the casing is provided with an inlet-nozzle 44, which may be connected with any suitable source of supply.
It has been found that, in spray-pipes with jet-openings in both their sides and their ends, the water, owing to its momentum, tends to discharge to an undue extent through the end-openings inpreference to the lateral openings. We have found that this tendency may be counteracted by the use of suitably placed bafiles in the spray-pipes, and Fig. 3 shows three such batlles, 45, as used in the pipe 16. The bafiles extend from the wall opposite the openings 19, partly across the bore of the pipe and in a slightly inclined position. The uppermost baflie, as shown, is so located as to modify the form of the fanlike jet issuing from the top opening in the pipe. As shown also in Fig. 3, the vertical part of each spray-pipe may be made as a separate member, adjustably fixed in the upturned end of the horizontal lower part of the same pipe,which is made of larger diameter for this purpose.
The invention is not limited to the embodiment thereof hereinbefore described and illustrated in the accompanying drawings, but it may be embodied in various other forms within the scope of the following claims:
The invention claimed is: y
1. A washing-machine comprising: a casing open at the top; a revoluble spray-device consisting of a body rotatably mounted at the bottom of the casing, and spray-pipes radiating from said body and extending first outwardly, near the bottom of the casing, and then upwardly near its walls, the spray-pipes being provided with inwardly-directed openings in their upright portions and with upwardly directed openings at their upper ends; a lower basket-like work-support suspended from the casing above the upper ends of the spray-pipes but depe ding into the space about which they'revol e; and a second basket-like work-support removably supported above the lower work-support, in
inwardly and upwardly-inclined direction;-
a lower basket-like Work-support suspended from the casing above the spray-device but depending into the'space about which said device revolves; and an upper basket-like work support mounted in the casing entirely above the spray-device and having a portion of its bottom formed as two concentric annular oppositely inclined surfaces to support hollow articles in positions suitable for receiving the upwardly-inclined spray.
3. A washing-machine comprising: a casing; a spray-device revoluble in the lower part of the casing and close to the wall thereof; and work-supporting means for supportingarticles both above the spray-device and within the space aboutwhich said device Ievolves; the spray-device comprising an upwardly-projecting tube provided with a contracted open upper end, horizontally-directed openings in its inner side, and inclined baffles extending'partly across its bore from the side opposite thehorizontally-directed openings.
4. A washing-machine comprisin'gz'a ca s-- ing open at the top; a cover for the top of the casing; a spray-device revoluble in the lower part of the casing and close to the wall thereof; and work-supporting means for supporting articles in the upper part of the casing and in the space-about which the spray-device revolves; the spray-device-being adapted to discharge spray inwardly, for direct action A against saidarticles, and also' to discharge spray upwardly to inpinge against said cover at its periphery and be deflected thence to the upper surfaces of said articles.
GEORGE EDGAR HAZARD. HARRY F. BOE.