US611218A - George e - Google Patents

Description

Patented Sept. 20, I898.

G. E. JOHNSON. SUPPORTING ATTACHMENT FOR .CUSPIDUR BOWLS.

(Application file d Dec. 30,1897.)

(No Model.)

WITNESSES:

UNITED STATES PATENT OFFICE.

GEORGE E. JOHNSON, OF FORT WVAYNE, INDIANA, ASSIGNOR TO THE PEERLESS FOUNTAIN CUSPIDOR COMPANY, OF SAME PLACE.

SUPPORTING ATTACHMENT FOR CUSPlDOR-BOWLS.

SPECIFICATION forming part of Letters Patent No. 611,218, dated September 20, 1898.

Application filed December 30, 1897. Serial No. 664,714. (No model.) 7

To all whom it may concern.-

Be it known that I, GEORGE E. JOHNSON, a citizen of the United States, residing at Fort Wayne, in the county of Allen,- in the State of Indiana, have invented certain new and useful Improvements in Supporting Attachments for Ouspidor-Bowls; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form part of this specification.

In an application filed June 21, 1897, Serial No. 642,066, I have described and claimed a dental cuspidor having a revoluble bowl pivotally mounted within an outer fixed bowl and adapted to be rotated by an impelling jet of water.

My present invention relates to an improved spider or supporting attachment for the pedestal of said revoluble bowl.

The object of my invention is to provide an improved supporting attachment for said'revoluble bowl and its bearings, whereby said bowl can readily and conveniently be removed without exposing the oil-bearing of its pivotal support.

My invention consists of an upright supporting-spider detachably mounted on the tubular stem or sleeve for the pivotal supporting-rod for said bowl, having a proper cone-bearing in the lower end thereof and provided with a spring-catch adapted to holdingly engage the pedestal of the revoluble bowl when the same is lifted out, thereby carrying with it the said spider, said sleeve, and

said pivotal support.

In the accompanying drawings, in which similar reference-numerals indicate like parts throughout the several views,Figure 1 is a bottom plan of my improvement, showing the peripheral knife-edge-supporting flanges there: on. Fig. 2 is a vertical central section of the same taken through one of said flanges, showing the said spring-catch and the set-screw by which the said spider is secured to said sleeve. Fig. 3 is a view of my invention in position for use, with its adjacent and supporting parts shown in vertical central section, and also showing a modified arrangement of the spring-catch. Fig. i is a perspective View of a modified form of my invention. Fig. 5 is a plan viewof the same with the said sleeve omitted. Fig. 6 is a vertical central section of the same taken through one of the said peripheral flanges.

All parts of my improvement are made of non-corrosive metal and is formed of a ring 1, having inclined sides, as shown, and a hub 2 in concentric arrangement with said ring and rigidly united thereto by a plurality of sup porting-legs 3, also in oblique arrangement, as shown, for the purpose hereinafter described. The legs 3 are provided upon their outer face and preferably throughout their length with a knife-edged flange 4, which also extends across the outer faceof the ring 1 to the upper edge thereof, as shown in Figs. at and 6, thereby affording a longer bearing and giving said spider greater rigidity when in position. While this knife-edge is not absolutely essential to said flange, it is preferable, as it presents less area for the collection of impurities. The ring 1 may be extended in width to the lower end of said legs, thus closing the sides of said spider and leaving the openings 5 in the bottom thereof, as shown in Figs. 1 and 2. The preferable construction, however, is that shown in Figs. 3, 4, 5, and 6, in which the ring 1 is comparatively narrow, leaving the sides of said spider open for the more ready escape of the waste water.

7 The vertical sleeve 6 has its lower end closed by a proper non-corrosive plug 8, in the top of which the rod 9 forms a cone-bearing, Fig. 3, and is preferably provided upon its upper end with an extension 7 of a slightly-increased diameter brazed thereon. On this extension 7 the hollow hub 2 is adj ustably mounted and firmly fixed in position'bya proper set-screw 10, which is placed directly below one of the legs 3 to present less obstruction to the waste. By arranging the enlarged tubular extension on the upper end of said sleeve 6 it affordsa larger bearing for the upper portion of said rod 15 without decreasing the size of the annular wasteway in the lower portion of said casting 13. At any suitable point within said spider, preferably upon the inner face of the ring 1 and adjacent to the inner face of one of said legs 3, is rigidly fixed a pendent springcatch 11, having upon its free end and outer face a lateral flange adapted to holdingly engage a proper annular flange upon the lower end of the bowl-supporting pedestal 12 for the purpose hereinafter described. The said spring-catch can obviously be variously arranged without departing from the scope of my invention. For example, it can be slightly modified in construction, have its lower end soldered or otherwise fixed to the said sleeve 6, and have its upper free end adapted to engage the said annular flange on said pedestal 12, as shown in Fig. 3.

The hollow castin g 13 is supported by the chair-bracket, of the usual construction, (not shown,) and the collar 14 is mounted on said casting by a screw-threaded connection and is adapted to support an outer fixed bowl, all of which is fullydescribed in my above-mentioned application, Serial No. 642,066. ithin the said collar and enlarged top of said casting 13 is loosely mounted my invention, with the knife-edge flangesat thereof bearing upon or in contact with the inner inclined and coincident faces of said collar and casting. The pedestal 12 for the inner revoluble bowl and the pivotally-supporting rod 15 therefor are also fully described in said prior application and need not be described in detail here. This pedestal is revolubly and concentrically arranged within my improvement, leaving a sufiicient annular space about said pedestal to afford a proper wasteway for the discharge of the waste water from said bowls.

The operation of my invention thus described is, briefly stated, as follows: hen my improvement is placed in position, the spring 11 normally engages the said annular flange of said pedestal, whereby when the operator desires to lift out the said inner revoluble bowl for the purpose of removing casual obstructions from the annular waste-passage in the lower portion of said casting 13 or for the purpose of cleansing the outer bowl the said spider and said sleeve 6 will be carried upward with it, thereby permitting the ready and convenient removal of said bowl and its pivotal support without exposing the oil-bearing thereof. Obviously the said innerbowl and supporting-pedestal 12 can readily be detached from said spider and said sleeve 6 by simply disengaging said spring 11 from said pedestal.

Having thus described my invention and the manner of employing the same, what I desire to secure by Letters Patent is- 1. In a dental cuspidor of the class specified a supporting-spider for the inner revoluble bowl, consisting of a ring and hollow hub in concentric relation, and integral 0blique legs rigidly uniting said ring and hub, and whose outer faces are adapted to rest or bear upon the adjacent inclined face of the containing casting, the said spider having a holding-spring detachably connecting it with the pedestal of said bowl for the purpose specified, all substantially as described.

2. In a dental cuspidor of the class specified a supporting-spider for the revoluble bowl consisting of a ring and hollow hub rigidly united in concentric arrangement by a plurality ofobliquelegs; a plurality of oblique legs uniting said ring and hub, and having upon their outer face a longitudinal knifeedge-supporting flange; and means for detachably connecting said spider to the pedestal of said bowl for the purpose specified, all substantially as described.

3. In a dental cuspidor of the class described, the combination of a ring 1 and a hub 2 rigidly united in concentric relation by inclined legs; the inclined legs 3 integral with said ring and hub and having their outer face provided with a supporting knife-edge for the purpose specified; a bearing-sleeve 6; means for rigidly fixing said hub on said sleeve; and a spring-catch fixed upon the inner face of said ring and adapted to holdingly engage the pedestal of a proper revoluble bowl for the purpose specified.

4- In a dental cuspidor of the class described, the hollow casting 13; the collar 14.- mounted upon said casting by a screw-threaded connection; the supporting-spider consist ing of a ring 1 and a hollow hub 2 rigidly counected in concentric relation by the inclined legs 3; the inclined legs 3, the bearing-sleeve 6 for the purpose specified; means for detachably securing said hub to said sleeve; and means for detachably connecting said spider with the pedestal of a proper revoluble bowl as described, all substantially as described.

Signed by 1ne,at Fort Wayne, Allen county, State of Indiana, this 24th day of December, A. D. 1897.

GEORGE E. JOHNSON.

\Vitnesscs:

ADELAIDE KEARNS, MINNIE YVEIL.

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