US971796A - Turn-table. - Google Patents

Description

A.o.sL1-:NTZ.

TURN TABLE.- APPLIOATION FILED JULY 30, 1910.

Patented 0ct.4, 1910.

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LA. o. SLENTZ.

` TURN TABLE. APPLIOATION FILED JULY 30, 1910.

Patented 0015.4, 1910.

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ALBERTUS O. SLENTZ, OF CANTON, OHIO, ASSIGNOR OF ONE-HALF TO TI-IE CANTON FOUNDRY AND MACHINE COMPANY, OF CANTON, OHIO, A CORPORATION OF OHIO.

TURN-TABLE.

armas.

To all whom 'it may concern:

Be it known that I, ALBERTUS O. SLENTZ, a citizen of the United States, residing at Canton, in the county of Stark and State of Ohio, have invented a new and useful rlurn- Table, of which the following is a speciiicL tion.

My invention relates to turn tables of what may be termed the knock-down variety wherein the various parts composing the device may be disconnected from each other and readily bundled or packed for shipment, the said parts being so constructed that they may be readily assembled and placed in position ready for use with but little skill and labor.

Turn tables of this class are frequently used in automobile garages, but the practical use of such devices is not at all so limited, such tables being employed in a large number of other instances where it is desired to provide a revolving platform capable of being arranged flush with the floor and capable of supporting a considerable weight while being easily rotated.

The objects of my invention are to generally improve devices of the character mentioned; to construct a turn table possessing great strength and so arranged as to revolve with the greater portion of the weight carried by said table supported on a bearing of relatively small circumference, provision being made for carrying any over-weight or unbalanced weight upon a second auxiliary.

bearing of greater circumference.

Another object of my invention is to provide a turn table so constructed that it may from time to time be adjusted, as circumstances may require, to maintain the parts in proper position with reference to each other, especially should they become strained or bent from any cause.

These and other objects apparent to those skilled in the art, I attain by the construction illustrated in the accompanying drawing, although my invention may be em bodied in other forms, the construction illustrated beingl chosen by way of example.

Figure 1 is a top plan view of my turn table showing parts removed and still other parts broken away. Fig. 2 is a perspective View of one of the trusses. Fig. 3 is a vertical sectional view of a truss taken on the line SMS of Fig. 2. Fig. il is a top plan view Specification of Letters Patent.

Application led .Tuly 30, 1910.

Patented Oct. a, 1910. seran No. 574,630.

of the turn table support. Fig. 5 is a top plan view of the inner track. Fig. G is a sectional view showing a part of the inner track. Fig. 7 shows the ends of two segments and a connecting block, also a fragmentary end of one of the trusses removed from said segments. Fig. 8 is a vertical section on line 8 8 of Fig. 1.

Throughout the several views similar reference numerals indicate similar parts.

In the drawings, 1 represents the cement lining designed to properly cover the bottom of the turn table pit and the vertical walls thereof. Upon the bottom of the pit is located the inner fixed track 2, which track is provided upon its upper surface with a groove or trough adapted to receive and hold in proper position a series of anti-friction balls 3, which balls are adapted to normally carry the weight of the rotatable portion of the turn table. For the purpose of providing means for causing the weight of the table to rest upon certain only of the balls 3 the bottom of the run-way or groove of the track 2 is formed with elevations il, and depressions 5, which elevations and depressions alternate in such a manner that those balls upon the elevations carry the weight of the turn table, the balls in the depressions being relieved from the weight and rolled down the incline; said balls in the depressions, however, being forced up the next incline by the balls behind the lower ones as the table is revolved.

Directly above the track 2 is located the turn table support proper G, which is circular in form and of a diameter corresponding substantially with the diameter of the circular track 2 so that said turn table support will ride upon the balls 3 as illustrated in Fig. S. For the purpose of holding the support 6 in proper relation with reference to the track 2 the fixed center post 7 is provided, which center post is secured to the hub 8, which hub is held by means of the spokes 9. rl`he center post is extended into the hub 10, which hub is formed at the junction of the webs 11. The turn table support G is composed of said hub 10, the inner cylindrical member 12 and the outer ring 13 all joined together by means of the said webs 11 and the webs 141-. rlhe top or upper edge of the cylindrical portion 12 is provided with the shoulder 15, which shoulder is designed to support a center plate 1G. The cylindrical member 12 is provided with a series ot openings 17 near its upper edge,

the number ot such openings corresponding l with the number ot the trusses designed to i be connected thereto. A corresponding number of openings 1S are provided in the outer ring 13 of the turn table support 6. The inner ends of the trusses are provided with the upper and lower screw threaded heads 19 and 20, which heads extend through the openings 17 and 18 respectively and upon which the nuts 21 and`22 are located. The trusses consist of the upper angle bars 23 and the lower angle bars 24, tied together by means of the web plates 25.

To the outer ends of the trusses are connected a series of segments 26, which segments when properly connected together constitute a ring rotatable with the turn table proper. Below this ring formed ot segmental sections 26 is located the fixed track 27, which is formed of a diameter corresponding substantially with the diameter of the connected segments 26 or the ring made up of such segments. The track 27 is held in proper concentric position by the spokes 28, said spokes being detachably connected at their ends to the track 2 and to the ring 27 as illustrated in Fig. 4. To the segmental sections 26 and preferably at their joints are attached the connecting blocks 29, which blocks are provided with the casters 30. The casters are normally held slightly elevated and out ot' contact with the outer track 7, but in the event of a heavy weight being placed upon the turn table near the periphery thereof the casters adjacent said weight will be lowered and caused to bear upon the outer track 27, the entire turn table proper being very slightly tilted, thus relieving the structure of undue strain.

It will be understood that in order to provide a turn table easily operated, the weight should be carried relatively near the center or axis and hence the trusses should be Vso adjusted that the casters 30 will normally be held out of contact with the track 27. The weight will thus normally be carried by the balls 3. This is also the condition when an automobile or other object of weight is upon the turn table properly balanced. Vhen, however, the weight is not balanced but is to one side of the center the casters 30 will assist in carrying the loa-d.

The outer ring 13 of the turn table support G is of considerably greater diameter than the inner cylindrical portion 12. Accordingly the lower angle bars 24 of the trusses are shorter than the upper angle bars 23, thus bringing the point of attachment of each lower head 20 at a point intermediate the ends of the upper angle bar 23 of the truss. This feature is well illustrated in Fig. 8. It will thus be seen that when the weight on the turn table is located between the center ot said table and a point in vertical alinement with the attachment ot' the head 20 the strain will be directly downward upon that part of the truss intermediate the vertical line through the head 2O and the inner end ot the upper angle bars lVhen, however, the object is located beyond a point in vertical alinement with the attachment of the head 20 the said weight will produce certain strains and thrusts in the trusses which the construction herein set forth is especially well adapted to endure. The lower bars 2st being relatively short are well adapted to endure the longitudinal thrust which is imparted to them while the web plates 25 distribute the strain as between the bars 23 and 24, portions ot' said web being under tractive and other portions under torsional strain. It should also be noted that the distance between the points of attachment otl the heads 19 and 20 is greater than the vertical distance between the head 20 and the top of the truss. This form ot truss and attachment is therefore capable of sustaining a greater load with less strain and with a more direct thrust upon that portion of the support 6 immediately above the balls 3 than it the heads 19 and 20 were arranged vertically one above the other. In addition to this fact the construction herein described enables the use oi' a track 2 of sutticiently large diameter to be practical while at the same time locating the nuts 21 on the heads 19 sutticiently close to the center ot the device so that the center plate 16 need not be otl great diameter or weight, said center plate being very readily removed when it is desired to have access to the nuts 21 tor the purpose of adjusting the trusses to maintain the parts of the device in proper relative position.

It will be understood that in turn tables of the class described it is desirable that the entire structure require but a shallow pit and from an inspection of the drawings it will be noted that the construction shown enables the use otl the minimum depth of pit tor a turn table adapted to be of practical service in supporting heavy automobiles or other objects.

As it is necessary that the sector shaped plates 31 should be held against accidental displacement with reference to the center plate 16 and the structure proper, and in order to provide against such displacement the bottom or under sides of each of the plates 31 are provided with tangs 32, which tangs extend under the upper truss bars 23. For the purpose of holding the plates down and upon the segmental bars 2G the screws are provided.

n order to provide for a proper drainage of the pit the bot-tom of the pit is provided with a series of trenches Bt, which trenches lead to the basin 35 from which basin leads the drain pipe 3G.

ln order to easily detach the spokes 2S the sockets 3T should be open so that the inner ends can be lifted up and the bars 28 pulled from the sockets 38 formed in the outer track 2T.

lior the purpose cf preventing the cement from breaking` or crumbling away at the top of the pit a metal band or inner hoop 3S) preferabl y of angle iron should be provided.

I claim:

l. ,fr turn table of the class described comprisingl an inner track, a series ot balls located upon said inner track, a turn table support carried by the balls, said turn table support' consisting of an inner cylindrical member and an outer ringmeniber of greater diameter than the cylindrical member, trusses adapted to beco-nnected at their inner ends to said turn table support, the inner upper ends of said trusses being` connected to said inner cylindrical member and the inncr lower ends of said trusses connected to said outer ring members, and a of plates connected to the trusses and forming a platform.

A turn table of the class described comprisingl inner and outer fixed concentric tracks. a turn table support rotatably mounted upon the inner track, radial trusses comprising spaced upper and lower bars, the upper bars connected to the turn table support and the lower bars connected thereto at a point farther removed from the center of said support than the point at which the upper bars are connected, a ring secured to the outer ends of the trusses and a series of plates connected to the trusses and adapted to form a platform.

S, A turn table comprising inner and outer tiXed concentric tracks, a support rotatably mounted upon the inner track, radial trusses adjustably connected to said support, said trusses coinprising spaced upper and lower bars, said upper bars being substantially horizontal and of greater length than said lower bars, se'ginental sections secured to the outer ends of the trusses adapted to forni a ring, said ring` located above the outer concentric track, casters connected to said outer ring, a center plate located above the support and a series of plates detachably secured to the trusses.

et. In a turn table of the class described, the combination of an inner track provided with alternating' elevations and depressions, a series of balls located upon said inner track. a turn table support carried by the balls, radial trusses comprising spaced upper and lower bars, the upper bars connected to the turn table support and lower bars connected thereto at a point farther removed from the center of said support than thc point at which the upper bars are connected, a ring secured to the outer end of the trusses, an outer track located beneath said ring and a series of plates connected to the trusses and forming a platform.

5. In a turn table of the class described, the combinatio-n of an inner track or way provided with alternating elevations and depressions, a of balls located upon said inner track or way, a turn table support carried by the balls, said turn table support consisting of an inner cylindrical member and an outer ring member of greater diameter than the cylindrical member, trusses connected at their inner ends to said turn table support, a ring secured to the outer ends of said trusses, an outer track located below said ring and a series of plates connected to the trusses and forming a platform.

G. A turn table comprising a rotatable support provided with an upper relatively small circular member and a lower, concentric, relatively ,large circular member connected thereto, radially disposed trusses provided with relatively long upper chords and relatively short lower chords, the inner ends of said upper chords connected to the upper circular member of said support, and the lower chords connected at their inner ends to the lower circular member of said support, and a platform supported by said trusses.

7. A turn table comprising a rotatable support provided with an upper relatively small circular member and a lower, concentric, relatively large circular member connected thereto, radially disposed trusses provided with relatively long upper chords and relatively short lower chords, the inner ends of said upper chords adjustably connected to the upper circular member of said support, and the lower chords connected at their inner ends to the lower circular member of said support, and a platform supported by said trusses.

8. A turn table comprising a rotatable support provided with an upper relatively small circular memberl and a lower, concentric, relatively large circular member connected thereto, trusses provided with relatively long upper chords and relatively short lower chords, the inner ends of said upper chords connected to the upper circular member of said support, and the lower chords connected at their inner ends to the lower circular member of said support, a platform supported by said trusses, said support mounted upon an inner bearing of relatively small diameter arranged concentrically with said support and adapted to normally carry said turn table in a hori- Zontal position and permit its rotation, and an outer, auxiliary normally inactive bearing arranged concentrically with the first mentioned bearing and adapted to assist said first mentioned bearing in carrying the weight of said turn table when over-loaded or tilted.

9. A turn table comprising a rotatable support provided with an upper relatively small circular member and a lower, con` centric, relatively large circular member connected thereto, trusses provided with relatively long upper chords and relatively short lower chords, the inner ends of said upper chords adjustably connected to the upper circular member of said support, and the lower chords connected at their inner ends to the lower circular member of said support, a platform supported by said trusses, said support mounted upon an inner bearing of relatively small diameter arranged conoentrically with said support and adapted to normally carry said turn table in a horizontal position and permit its rotation, and an outer, auxiliary, normally inactive bearing arranged concentrically with the irst mentioned bearing and adapted to assist said lirstmentioned bearing in carrying the weight of said turn table when overloaded or tilted.

l0. A turn table comprising a platform mounted upon a supporting member and trusses, said supporting member rotatable and said trusses comprising relatively long horizontal upper chords and relatively short, inclined lower chords connected together' and to said supporting member.

1l. In a turn table of the Class described a platform supported by trusses connected to a rotatable support, each of said trusses consisting of upper angle bars arranged horizontally and lower angle bars arranged in inclined position, said upper angle bars and lower angle bars tied together by means of a web plate, upper and lower heads connected to the inner ends of said upper and lower angle bars, and said lower head arranged at a point longitudinally intermediate said upper head and the outer end of said truss.

In testimony that I claim the above, I have hereunto subscribed my name in the presence of two witnesses.

ALBERTUS O. SLENTZ.

Vitnesses:

IVILLIAM II. MILLER, IRENE LUTZ.

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