US1181108A - Mounting for record-supporting tables in talking-machines. - Google Patents

Description

F. L. CAPPS. MOUNTINGFOR RECORD SUPPORTING TABLES IN TALKING MACHINES. APPLICATION FILED JUNEI. I915.

Patented May 2, 1916.

2 SHEETSSHEET l I F. L. CAPPS. MOUNTING FOR RECORD SUPPORTING TABLES IN TALKING MACHINES.

APPLICATION FILED JUNE 1, I9I5.

Patented May 2,1916.

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THANK Id; CAPPS, 0F BRIDGEPORT, CONNECTICUT, ASSIGNOR 130 AMERICAN GRAPHO- PHONE COMPANY, OF BRIDGEPOBT, CONNECTICUT, ACORPORATION OF WEST VIB- GIINLA.

' EEOUNTING FOR RECORD-SUPPORTING TABLES IN TALKING-MACHINES.

To all whom, it may concern;

Be it'known that I, FRANK L. Cams, a citizen of the United States of America, and a resident of Bridgeport, Connecticut, have invented a new and useful Improvement in Mountings for Record- Supporting; Tables in Talking-Machines, which invention is fully set forth in the following specification. i

This invention relates to improvements in talking machines, and moreparticularly to the mounting for the turn-table which supports the record in the disk type of talking machines. In machines of this type, there is provided a vertical motor-driven shaft upon whose upwardly projecting free end a turn-table'for the record is removably mounted. The turn-table is usually composed of metal'andis of considerable weight in order to insure steadiness of movement, andis provided with a downwardly projectihg centrally located hub having a conical vertical central opening formed therein to receive the correspondingly shaped upper end of the vertical driving shaft of the machine. The turntable is secured to the motor purely by the wedging action due to its weight and the conical engagement of the hub of the turntable with the shaft. Heretofore, the conical bearing upon the shaft has usually been formed bydrivmg upon the shaft a section of a brass tube, Whose exterior diameter slightly exceeds the interior diameter of the base of the conical ing in theturn-table.

opening through the hub of the table. The exterior portion of the section of the brass tube has been turned down into conical form, so as-to accuratelyfitthe conical open- The lowerportion of the hub of the turn-table projects considerably below the lower. surface of the turn-table itself, for the purpose of giving verticalextent ofbearing ofthe turn-table on the shaft, in order that the turn-table may be firmly located thereon and prevent rocking and insure its steady movement in a horizontal plane during the revolution of theshaft. that the hab' of the turn-table should have bearing upon the brass tubular cone of the shaft the upper portion of the said hub and)at/the- 'lower'portion to recurethe stability required,but it is not necessalfy the hub should contact with Specification of Letters Patent.

It is therefore important- Patented May 2, 19116.

Application filed Junel, 1915. Serial No. 31,463.

has a central zone between its upper and lower portions slightly turned away so" that the interior of the hub of the table contacts only with the upper and the lower portions of the cone on the shaft.

The construction just described involves a material expense in the material required for the cone upon the shaft, a waste of the material which is turned awayto form the cone, and the employment of skilled labor to turn down the section of brass tubing to form the conicalbearing on the shaft.

The object of the present invention is to provide the required conical bearing upon the shaft for the turn-table at a very material reduction in cost of material and labor required in the manufacture of the aforesaid conical bearing. upon the shaft.

With thise'nd in View, the invention con sists in providing a section of thin tubing, preferably of brass and approximately of about three-quarters of 'an inch in length and having uniform internal and external diameters, the internal diameter being such as to cause said tubular section to fit tightly 'upon the upper end of the motor shaft, and

the external diameter being but slightly in excess of the diameter of the conical bearing in the hub of the tu1'n table at its upper portion. This tubular section is then pressed or drawn or otherwise suitably treated to cause its lower end to be flared out and its diameter thus increased until its, external diameter slightly exceeds that of the internal diameter of the conical opening in the hub of the turn-table at its base. upper end portion of this tubular section thus prepared is then turned off to form a perfect cone to fit the upper portion of the The conical opening in the hub of the turn-table, and the exterior portion of the flared lower end is also turned ofi along the lines,'of a" true cone,,in .order that it may accurately fit within the internal -portion of the base of the conical openlng in the turn-table.

By this means, the amount of material in the tubularsection, which is usually an expensive metal such as brass, 1S materially reduced. The amount of waste in the form of shavings that are turned off isreduced,

and'theamount of labor in turning the part is very largelyreduced. The inventive idea is illustrated in the accompanying drawings, in which Figure 1 is a broken side elevation of a talking machine, with parts shown in section, and illustrating the improved bearing in position on the machine with the turntable in position Fig. 2 is a detail, on anen- 'larged scale, showing the vertical shaft with the bearing thereon and the hub of the turntable in position; Fig. 8 is a horizontal section on the line 33 of Fig.2, looking in 'the direction of. the arrows; Fig. i is a side elevation of the shaft with the conical bearing thereon; Figs. 5 and .6 are, respec tively, a vertical section and-side elevation of another form of the invention.

1 Referring-to the drai'vings,.in which like reference numerals indicate like parts throughout the several views, 1 indicates the frame-work ofthe usual or any suitable disk talking machine provided with a suitsteel shaft.

-5, there is provided the usual downwardly able motor 2 connected by gearing 3 with the lower. end of'the shaft 4 for carrying. the turn-table 5, upon which'table the record is supported in the way well known in this art; The lower end ofthe shaft 4: is provided with gearing toengage with the gearing 3 driven'by the motor,'and is here shown as formed, by a gear 6 cut directly in the On the under side of the table projecting hub 7- having the usual conical opening 8 formed therein. On the upper portion of the shaft 4:, there is mounted a. section of thin tubing 9 of any suitable hard metal, preferably brass, which section is of Such internal diameter as to fit tightly upon theshaft when it is driven thereon, so that it revolves with the shaft. Preferably, the

shaft is roughened, as at 10, Fig. 2, to insure a tight fit and preventrelative turning movement between the tubular section 9 and the shaft 4. The tubular section -9 is flared outwardly at its lower part, as at 11. The

external diameter of the tubular section at its upper part slightly exceeds the internal diameterof the conical 'openingin the hub at its upper portion, and the external diameter of the flare 11 slightly exceeds the internal diameter of the base of the conical opening in said hub, when the said tubular section ,is placed in position on the shaft in the course of manufacture. The shaft is then put in a turning lathe and the upper exterior corner or edge portion of the tubular section is cut away along the lines of a truecone, at 12, and the lower flared por-. tion 11 is cut away along the 111185 of a true cone, at 13, so that when the turn-table 5 is .placed in position the interior conical opening', 8 in the hub 7 engages the conical porticns '12 and 13 on the tubular section, but does not engage said tubular section between the conicalportion's 12 and 13. It will be perceived that thesection of expensive brass tube employed in this construction is --1nuch thinner and therefore less expensive than the section of brass tube re ulred in the manufacture of the old form 0 bearing or support, and that the amount of turning required is very much less than in theold form, it being merely necessary for the workman to. trim off a very-slight portion to form the surfaces 12 and 13; and that no turning is necessary to-produce the depressed portion 11 on the bearing between the conical portions 12 and 13. This results not only in a saving ofthe time of expert workmenrequired toefiect the turning, but also a very great saving in the weight of material that is turned off. At the same time the turn-table is provided with therequisite firm bearing both at the top and at the bottom portion of its hub, thereby insuring a perfect steadlness of movement free from tilting and rocking action.

--In Figs. 5 and 6 is illustrated another form of bearing that may be employed when non-flaring surface 11. In this form of the invention, the shaft 4 1s providedwith two knurled surfaces 10. 10' and a,

of thin hard metal tubing, -as brass, hasits upper end 16 and its lower end 17'turned' inwardly to tightlyengage the knurled sur- I tion of tubing, it may be formed of sheet;

brass rolled into the proper form with its edges meeting along the line, 18, Fig. 6.

It will'be readily.understood bythose skilled in; the art that the invention herein described may be embodied in a variety of mechanical forms without departing from the spirit of the invention, and such modifi-. cations and forms are designed to becoveredby the' appended claims.

What is claimed is 1. In a talking machine, the combination of a sound-record-receiving table having a vertical central conical openingformedtherein, a vertical shaftfor driving said turn-table, a motor in operative relation with -said shaft, and a hearing or turn-table supporton said-shaft, said'bearing consist-- 95 it is not'desired to provide the intermediate ing ofa section of thin metal tubing flared outwardly at its base and having a conical surface formed adjacent to its upper end and a conical surface formed on said outwardly flared portion.

2. In a talking machine, the combination of a sound-record-receiving table having .a downwardly projecting hub on the under side thereof and located in the axis of said table. said hub being provided with a ver tical axial conical opening, with a motor driven vertical shaft for supporting and driving said table. said shaft having a bearing or support for the table comprising a section of thin metal tubing secured on said shaft to revolve therewith and having a flared base portion. the outer surface of said base portion being formed as a conical surface to receive and fit the conical opening formed in said hub.

3. I11 a talking machine, the combinationof a sound-record-receiving turn-table having a conical opening therein. a vertical motor-driven shaft for driving said table, said shaft being provided with a bearing or support for. said table consisting of a section of thin metal tubing secured to and revolving with said shaft and having a flared base portion, said flared portion being provided with a conical outer surface fitting within the base of the conical opening in the turntable and a second conical surface formed on said section of metal tubing above said flared portion.

at. In a talking machine, the combination of a sound-record-receiving turn-table having a central vertical conical opening formed therein. a motor-driven shaft supporting and driving said table. sa'id shaft being provided with a bearing or support for thetable consisting of a section of thin metal tubing having a flared and a non-flared portion. said flared portion being provided with a conical surface fitting a portion of the conical surface of the opening in the table. and a second conical surface on the nonflared portion of said section of metal tubing and also fitting a portion of the surface of the conical opening in said turn-table.

In a talking machine, the combination of a sound-record-1eceiving turn-table having a central vertical conical opening formed consisting of a section of thin metal tubing having a portion thereof flared outwardly. the conical opening in said turn-table engaging both the flared and a non-flared portion of said section of metal tubing.

7. In a talkingmachine. the combination of a motor. a vertical shaft driven by the motor. a sound-record receiving table having a central vertical conical opening formed therein. and a tubular sheet metal table support contacting interiorl at points near each end with the upper part of the shaft and exteriorlv at points near each end with the surface of the conical opening in the table. a portion of the tube being bent to extend outward from the shaft to provide the said exterior points of contactat one 'end.

In testimonv whereof I have signed this specification in the presence of two subscribing witnesses.

FRANK L. CAPPS. 'itnesses \V. S. KERR, J. S. GRIFFITH.

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