US2160031A - Perforate table - Google Patents

Description

May 30, 1939. w. F. OHME 2,160,031

' PERFORATE TABLE Filed Feb. 1, 1937 2 Sheets-Sheet l ammo/WM Walter F Ohme Patented May 30, 1939 UNITED STATES PERFORATE- TABLE Walter F. Ohme, Minneapolis, Minn., assignor to North Star Specialty & Manufacturing Company, Minneapolis, Minn, a corporation of Minnesota Application February 1, 1937, Serial No. 123,380

3 Claims.

' My invention relates to perforate tables and particularly to tables for use in supporting drinking vessels or other dishes which are being washed by means of sprays of water which pass through the table from beneath and wash the vessels while resting upon the table.

An object of the invention resides in providing a perforate table which will offer a minimum amount of resistance to the flow of water through the same.

Another object of the invention resides in providing a perforate table by means of which more thorough washing of the drinking vessels carried by the same can be procured.

A still further object of the invention resides in providing a perforate table constructed so that the supporting surface thereof will contact with the vessels over a minimum area.

' Another object of the invention resides in con- 20 structing the table with spaced supporting mem- 30 bers for holding the same in proper spaced relation.

A still further object of the invention resides in forming the supporting members circular and of difierent diameters and in arranging the same 5 in concentric relation.

An object of the invention resides in arranging the tie members in radial relation with respect to the supporting members. 7 I

Another object of the invention resides in the specific construction of the jointsbetween the sup-porting members and tie members. and the joints at the ends of the supporting members.

Other objects of the invention reside in the novel combination and arrangement of parts and in the details of construction hereinafter illustrated and/or described.

In the drawings:

Fig. 1 is a medial elevational sectional View of a machine for washing drinking vessels illustrating a perforate table embodying my invention.

Fig. 2 is a plan view of the table detached from the machine.

Fig; 3 is a perspective view of one of the circular supporting members of the table shown in Fig. 2.

Fig. 4. is a perspective view of one of the tie members of the table shown in Fig. 2.

Fig. 5 is an inverted perspective view of a por-, tion'of the structure shown in Fig. 2 with one of the tie members detached from the supporting members.

In order to more fully explain the application and operation of the invention my improved table has been shown as embodied in a machine for washing drinking vessels and only so much thereof as will be needed to explain the instant invention will be described.

The machine for washing drinking vessels herein illustrated comprises a housing which I have indicated in its entirety by the reference character A and in which the mechanism of the machine is disposed. The Washing mechanism of the invention comprises a revoluble rack B of I D. These various parts will now be more fully described.

The housing A consists of a tray l0 circular in form which is constructed with a bottom ll having a rim l2 extending upwardly therefrom. The bottom is preferably sloping toward the forward portion of the tray where a drain I3 is provided by means of which the water discharged intothe housing may be removed from the device. 'At the outer margin of the bottom II is provided a ledge M which elevates the bottom ll above the surface on which the machine rests. This ledge may, if desired, be formed in continuation of the rim l 2 of said tray. The tray I0 is constructed as a casting or the same may be spun from sheet metal or constructed in any other suitable manner. The housing A further comprises a circular wall l5, which is secured to the rim of the tray l0 and extends upwardly therefrom. The lower edge of this wall rests in a recess i'i formed in said rim. The wall I5 is preferably attached to said rim through small bolts [6 which pass through suitable openings in both said rim and wall. Upon the upper end of the wall I5 is, placed a cover or closure l8 which is circular throughout the extent thereof. This closure is provided with a flange 20 which extends downwardly therefrom and which terminates at its lower end in a lip 2| by means of which the closure may be secured to the wall 15. This is accomplished through bolts 22 which pass jointly through said wall and lip the same as the bolts IS. 'The wall I5 is of lesser circular extent than a complete circle so that an opening 23 is provided at the front of the housing through which access may be had to the interior thereof and to the drinking vessels placed upon the rack B mounted therein.

The rack B consists of a perforate table 24 which constitutes the invention. This table is constructed with a number of circularly formed concentrically arranged rings 25, 26, 21, 28, 29, 3t, 3!, 32 and 33. The rings 26 to 32 inclusive are all constructed in the same manner and the rings 25 and 33 are similarly constructed in the same manner. The description of the rings 25 and 26 will hence only be given.

All of the rings as shown in the drawings are constructed from flat strips of metal such as is known in the trade under the name of flat wire, which is formed with flat sides and with slightly rounded edges. For the sake of simplicity the rings have been shown in the drawings as being rectangular, whereas in actuality the corners are slightly rounded. It can, however, be readily comprehended that square corners, such as shown may be employed instead of the rounded edges referred to.

The ring 25 is of the greatest diameter and is formed at one end with a dovetailed slot 35. The other end of the said ring is constructed with a dovetailed tongue 36 which is adapted to flt in the slot 35 and to form a lock joint for the end of the ring. All of the other rings are similarly constructed with like joints of which only certain of said joints have been shown in the drawings. At suitable intervals throughout the peripheral extent of the ring 25 the same is constructed with punched rectangular openings 34 which extend completely through the same. These openings are preferably equally spaced and in the instant case six of such openings are employed.

The rings 26 to 32 inclusive are of slightly less width than the rings 25 and 33 and are so disposed that the rings 25 and 33 form guards to prevent the glasses or dishes from sliding off from the rack.

The ring 26 as shown in Fig. 3 is constructed at one end with a dovetailed slot 31 and at its other end with a dovetailed tongue 38 which fits into the same and forms a joint for the ring the same as the joint for the ring 25. This ring is constructed with a number of notches 39 which extend through the lower edge of the ring and upwardly to the center of the ring. These notches are equally spaced and there are as many of the said notches as there are openings 34 in the ring 25.

In conjunction with the various rings a number of tie members 4!, 42, 43, 44, 45 and 46 are employed which are all identical in construction. Only tie member 4! has been illustrated in detail in the drawings which will be described. This tie member is constructed of flat wire the same as the rings, but is straight and of a Width equal to the width of the rings 26, 21, etc. This tie member is constructed at one end with a tongue 4? which provides shoulders 48 at the end of the strip adjacent said tongue. The other end of the strip is similarly constructed with a tongue 5! providing shoulders 52 adjacent the same. Intermediate the ends of the strip are provided notches 53 in the uppermost portion thereof which are of a depth equal to half the width of the strip and of. a width equal to the thickness of the material from which the rings 26 to 32 are constructed. The tongues 41 and 5| are of such dimensions as to be snugly received within the openings 34 in the rings 25 and 33.

Before assembling the parts of the table, the various rings are first connected together at their ends and the joints between the ends of the rings preferably soldered. The outer ring 25 is first assembled upon the ends of the tie members 4! to 46 with the tongues 4'! received within the openings 34 and with the shoulders 48 bearing upon the inner surface of this ring. The inner ring 33 is then similarly applied with the tongues 5| received within the openings 34 and the shoulders 52 bearing against the outer surface of said ring. Tongues 4'5 and 5! are next riveted over so that the parts become securely attached to one another. The rings 23 to 32 are next successively assembled one at a time by bringing the notches 39 thereof into cooperation with notches 53 of tie members 4% to 43. After all of the rings have been assembled the joints are closed either by soldering, riveting or otherwise to provide a unitary structure in which all of the parts are firmly secured together and in which the supporting surfaces thereof consist of, the edges of the various supporting members or rings.

It will be noted that all of the edges of the supporting members 26 to 32 inclusive lie in a common plane, while the edges of the members 25 and 33 extend upwardly from said plane to form guards for preventing the drinking vessels from sliding off from theta'ble.

The table 24 is rotatably supported on a spider 6! which comprises a central tubular hub 52 connected to a circular flange 60 through radially extending arms 63. The hub of this spider has mounted in it ball bearings 54 and 65 which are disposed at the upper and lower ends of the same. In the center of the bottom ll of tray 29 is provided a boss 65 which has secured to it through a set screw 51 an upwardly extending post 68. Post 68 is turned to receive the inner races of the two bearings 54 and 55. By means of these two bearings the spider Si is rotatabl; mounted. A cap 69 secured to the upper end of the hub 62 covers the bearing 64 and prevents the entry of water into said bearings from above. The table 24 rests upon arms 1! extending outwardly from the flange 60 of spider 5i and is centered with respect to the axis thereof. through said flange. The flange is of such dimensions as to snugly receive the inner ring 33 of the table 24.

It will be noted that flange 65 extends above the surface of the table 24 and assists in preventing articles positioned on said table from traveling inwardly off the table. To further serve this purpose a guard 12 is employed which is constructed from sheet metal bent in cylindrical form with a curvature substantially equal to the curvature of the flange 35. This guard is bolted to a mounting J3 by means of bolts 14 and may be easily removed when access into the interior of the machine is desired. Mounting 13 is soldered or otherwise secured to the cover I8.

Inasmuch as the water motor C and the power transmission associated therewith form no particular feature of this invention, these parts have not been shown in detail. The water motor C is, however, constructed with a water wheel E5 which through a suitable train of gearing drives a friction pinion 16. This friction pinion engages a friction gear 17 formed by the inner surface of the flange 60 of spider Bl.

The spraying device D consists of a series of sprays 18 which are disposed above the rack B and another series of sprays 19 which are disposed below said rack. These sprays are interconnected by tubes 8| and are fed by a number of tubes 82 which are connected to a valve 0perated control mechanism 83 whereby hot and cold water are furnished to the sprays. This construction forming no feature of the invention has not been shown in the drawings, though it can readily be comprehended that a construction such as shown in the application for patent of Walter F. Ohme and Ray C. Stephan, Serial Number 741,078, filed August 23, 1934 may be used for the purpose.

The operation of the invention is as follows: As the water motor 0 operates rack B is rotated and the table 24 resting on the arms H thereof travel with it. Glasses, drinking vessels or other dishes are placed upon the rack through the opening 23 in housing A and the same rotate slowly through the machine. As the glasses or drinking vessels upon the table 24 pass the sprays l8 and I9 hot or cold water as desired is sprayed upon the interior and exterior thereof. The sprays of water from the sprays 19 pass between the rings 25 to 32 of table 24 and wash the drinking vessels upon the interior thereof. Due

to the fact that the rings are constructed of flat wire a very small amount of resistance to the passage of water through the table results, whereby the full force of the water is directed against the drinking vessels and the same effectively cleaned. As the same time water is directed substantially to the entire interior area of the vessels, since the table ofiers a minimum amount of blocking to the passage of water. Due to the fact that the supporting members of the table are constructed of flat wire, point contact between the table and drinking vessels results so that only a minimum portion of the vessels are not subject to the cleansing action of the sprays. The result is that the glasses are almost perfectly washed when the same pass through the machine. I have found that a certain amount of vibration is set up in the machine which causes the glasses to slightly shift positions. Due to this fact the engaged portion of the vessels is varied so that all portions thereof may be thoroughly washed.

The advantages of my invention are manifest. Washing of drinking vessels is accomplished in a minimum length of time and with a minimum amount of water. A minimum amount of obstruction to the flow of water through the table is effected so that the desired results are readily attained. My improved tab-1e is considerably stronger than a cast table or a table constructed of round wire and has the added feature of minimum blocking of the travel of water through the same.

Changes in the specific form of my invention,

supporting members having openings extending therethrough and disposed in alignment with said notches, tie members constructed of fiat strips provided with upwardly extending notches engaging the notches of said supporting members, and tongues on the ends of said tie members entering said openings.

2. A perforate table for use in a washing machine including a central supporting hub with a rim extending about the same, said table comprising a plurality of supporting members in excess of three, constructed of flat strips bent in the form of circles of diiferent diameters, said strips being arranged on edge in spaced concentric relation, the intermediate of said supporting members having aligning radially downwardly extending notches therein, the innermost of said supporting members having openings extending therethrough and disposed in alignment with said notches, tie members constructed of flat strips provided with upwardly extending notches engaging the notches in said intermediate supporting members and tongues on the ends of said tie members entering said openings, said innermost supporting member resting on said rim and receiving stresses transmitted from the intermediate supporting members through said tie members.

3. A perforate table comprising a plurality of supporting members in excess of three constructed of flat strips bent in the form of circles of different diameters, said strips being arranged on edge in spaced concentric relation, the intermediate of said supporting members having aligning radially downwardly extending notches therein, and the outermost and innermost of said supporting members having openings extending therethrough and disposed in alignment with said notches, tie members provided with upwardly extending notches engaging the notches of said intermediate supporting members, and tongues on the ends of said tie members entering said openings, said intermediate supporting members being arranged with their edges in a common plane and said outer supporting member being of greater width than the intermediate supporting members and extending above the same to form a rim and to strengthen the outer portion of the table due to the weakening thereof caused by said openings.

WALTER F. OHME.

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