US1365707A - Phonograph-drive - Google Patents

Description

W. L. LI NDGREN.

PHONOGRAPH DRIVE- APPLICATION FILED 1104.3. I920.

1,365,707, Patented Jam-18, 1921.

3 SHEETS-SHEET I.

W. L. LINDGREN. PHONOGRAQPH DRIVE.

APPLICATION FILED JAN. 3, 1920.

' 1,365,707. M Pawnmd Jan. 18,1921.

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APPLICATION FILED JAN. 3,1920.

Patented Jan. 18, 1921.

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vEL UR I L e r H i 4 m 6 M V #7 UNITED STATES PATENT OFFICE.

WALDEMAR LINNE LINDGREN, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE SECURITY TOOLS WORKS, A CORPORATION OF ILLINOIS.

PHON'OGRAPH-DRIVE.

Specification of Letters Patent.

Patented Jan. 18, 1921.

Application filed January 3, 1920. Serial No. 349,270.

To all whom it may concern:

Be it known that I, WALDEMAR LINNE LINDGREN, a citizen of the United States, and a resident of the city of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improve ments in Phonograph-Drives; and I do hereby declare that thefollowing is a full, clear, and exact description of the same, reference being had to the accompanying drawings, and to the numerals of reference marked thereon, which form a part of this specification.

This invention relates to an improved arrangement of the parts of a motor drive mechanism whereby a compact assembly of elements is assured and one operating efficiently for any purpose desired.

It is an object, therefore, of this invention, to construct a driving mechanismparticularly adapted for use in connection with a phonograph wherein there is practically no vibration of the elements of the driving mechanism transmitted to the record carrying table so that the best possible results in tone reproduction are secured.

Drawings.

Figure 1 is a side elevation of a driving mechanism embodying the principles of my invention shown attached beneath a cabinet top of a phonograph machine.

Fig. 2 is a bottom plan view thereof with the parts shown in section, taken substantially on the line 2-2 of Fig. 1.

Fig. 3 is a view illustrating a side eleva.

Fig. 8 is an interior view of one of the winding gears of the-motor.

Descfipton.

The cabinet top of a phonograph is dc. noted as a whole by the reference numeral- 1. Attached thereto to sustain the driving mechanism for the phonograph is an inte-. $1 .1 ra c s ructur den ted; a wliqle the reference numeral 2. Supported be tween a pair of depending arms 8 and 4 respectively, integral with, and forming a part of the frame 2, is a spring motor 5, the winding gears 6 and 7 of which are shown at one end thereof in Fig. 3. The spring motor 5 is provided with a driving shaft 8 and the end thereof, journaled in the bracket 3 and shown clearly in Figs. 1 and 5, has secured thereon a large driving gear 9.

J ournaled in depending bearing members 10 and 11 of the frame 2, as shown in Fig. 2, is a counter shaft 12, and as shown in Fig. 7 provided with an adjusting screw 13 bearing against the shaft 12 to set same in proper adjusted position between the bearing members. Formed upon the counter shaft 12 is a small pinion 14: and adjacent thereto also secured upon said shaft is a skew gear 15.

Referring now to Fig. 8, the gear 6, it will be seen, forms an annulus for an internal ball-clutch mechanism constituting an inner member 16 secured upon the motor shaft and having wedging recesses 17 therein in which are mounted balls 18 for rotation of the recessed member 16 in driving direction by the gear annulus 6.

Journaled in the frame 2, as shown in Fig. 6, is an upright spindle shaft 19 for the record playing table, and the lower end of said spindle shaft is seated in an adjustable pivot bearing consisting of a plug member 20 threaded into a depending arm extension 21 of the frame, and held in adjusted position by a lockingnut member 22. The pivot bearing is provided with a ball 23 on which the. end of. said shaft is supported. A worm 24 is formed on said spindle shaft and is in mesh with a worm element 25 formed on a horizontal shaft 26 journaled in bearings 27 and 28 respectively. Said shaft 26 has secured thereto the. skew pinion or gear 29, which meshes with a skew element or worm turning on an upright or vertical governor shaft 31, shown clearly in Fig. 5, and journaled at its upper end in a bearing 32, which is of cylindrical shape and insertible through an aperture in the frame 2, thus providing a means for slight ad justments of the worm element 30 toward and away from the gear 29.

The lower end of said shaft is journaled in a pivot bearing cqmpri ing p s 1 ment 33, threaded into a depending arm extension 34 of the frame 2 and locked in adjustable position therein by a nut 35 provided with a bearing ball 36, upon which the lower end of said shaft 31 is supported. The play allowed in the bearing 35 for the lower end of said shaft 31 is very slight, for only permitting the small angular adjustment which is necessary for minute adj ustments of the upper end of the shaft, carry ing the worm 30, toward and away from the gear 29. Said adjustable bearing 32 may be fixed in any position by the threaded set screw 37, which engages upwardly through the under side of the frame 2, as clearly shown in Fig. 5.

Referring now to Fig. 4, in which the respective bearings 27 and 28 are shown in section, it will be seen that the same comprise removable plug elements 38, each provided with an end bearing ball 39 and with the said adjustable members 38 held in adjusted position by set screws 40. This construction permits removal of one of the adjustable members 38 from the bearing 27 by withdrawal therefrom, thereby permitting detachment of the shaft 26 from the assembly. Mounted upon the upright shaft 31 is a conventional type of centrifugal governor denoted as a whole by the reference numeral 41, and acting, with increase in speed of revolution of said shaft, to draw a governor disk 42, also mounted upon said shaft, downwardly, referring to Fig. 1. As shown clearly in Fig. 1, a depending extension 43 is provided integral with the frame 2 and pivotally mounted therein is a lever 44 having secured in one end thereof, a brake shoe 45 adapted to bear upon the under surface of the governor disk 42. A set screw 46 is placed in the under surface of the frame 2, directly above said lever 44 and is held in adjusted position by the nut 47, and the lower end of said set screw bears on the upper edge of lever 44 to permit change in the bearing pressure of the brake shoe 45 upon the governor disk 42 to regulate the normal speed of operation of the motor mechanism to the speed desired.

Operation.

The arrangement of the various parts of this motor driving mechanism are particularly efficient and compact and admirably suited for the purpose intended.

The spring motor 5 drives through the large gear 9 to the small pinion 14, with which the large skew or worm gear 15 is associated, and which in turn serves to drive the upright spindle shaft 19, on which the record carrying table (not shown) is mounted. The skew or Worm element 24 formed upon said spindle shaft 19 is meshed h the driving gear 15 and also by a driven skew or worm element 25, as clearly shown in Fig. 2. The drive which is taken oil of the spindle shaft is for the purpose of driving the governor mechanism so that the retarding effect thereof to regulate the speed of operation of the motor drive, .is transmitted to the spindle shaft 19 to retard the same and not directly to the motor -is a consequence the'driving force of the motor 5 operates against a retarding effect upon the spindle shaft 19 and backlash is avoided.

The intermediate drive from the spindle shaft 19 to the governor mechanism comprises the skew or \vorm element upon the shaft 26, which meshes with the worm 24 of the shaft and the skew or worm gen r 29 011 said shaft 26, which in turn meshes with the worm 30 of the governor shaft 251. The speed regulation of the driving mechanism is effected. by adjustment of the set screw 46 bearing upon the upper edge of the pivoted lever 44, the other end of which carries the brake shoe 45 hearing on the under surface of the slidable governor disk ir I am aware that numerous details of construction may be varied through a wide I range without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted otherwise than necessitated by the prior art.

Ola 51m.

scribed comprising a motor shaft, a gear 1' thereon, a counter shaft parallel to said motor shaft and driven by said gear, a spindle shaft vertically mounted, a skew gear on said counter shaft driving directly to a worm on said spindle shaft, a transverse shaft directly driven by said spindle shaft, and a governor mechanism driven by said last mentioned shaft.

3. A driving mechanism of the class described comprising a horizontal motor shaft, a counter shaft driven thereby, a vertical. spindle shaft driven by said counter shaft, a horizontal counter shaft driven by said spindle shaft, and a vertical governor shaft driven by said last mentioned horizontal counter shaft.

4. In a motor driving mechanism of the class described, a motor shaft, a counter shaft parallel thereto and driven thereby, a spindle shaft at right angles to said coun- 'I (ll) ter shaft and driven thereby, a transverse shaft at right angles to said spindle shaft and driven thereby, and a governor shaft at right angles to said transverse shaft and driven thereby.

5. In a motor driving mechanism of the class described a vertical spindle shaft, a horizontal shaft driving directly thereto, a horizontal shaft driven by said spindle shaft, and a governor shaft parallel to said spindle shaft and driven by said horizontal shaft.

6. A motor driving mechanism of the class described comprising a motor, a spindle shaft, driving connections between the motor and the spindle shaft, a governor mechanism and driving connections between the spindle shaft and the governor mechanism, said governor mechanism comprising a shaft parallel to said spindle shaft.

7. In a motor driving mechanism of the class described, a horizontal motor shaft, a counter shaft parallel thereto and driven thereby, a vertically mounted spindle shaft driven by the counter shaft, a second counter shaft driven from the spindle shaft disposed at right angles to said first mentioned counter shaft and to the spindle shaft, and governor mechanism driven by said second mentioned counter shaft.

8. A motor driving mechanism of the class described comprising a motor shaft, a counter shaft parallel thereto, a spindle shaft at right angles to the counter shaft and driven from the motor shaft, a second counter shaft at right angles to the spindle shaft and to said first mentioned counter shaft, and governor mechanism driven by said counter shaft.

9. In a motor driving mechanism, a motor shaft, a counter shaft driven thereby and in a parallel plane thereto, a spindle shaft at right angles to the counter shaft and driven thereby, a second counter shaft in a plane parallel to the plane of said first mentioned counter shaft and at right angles to the plane of the spindle shaft and driven thereby, and a governor mechanism in a plane parallel to the spindle shaft and driven by said second mentioned counter shaft.

10. In a driving mechanism of the class described a motor shaft, a spindle shaft at an angle thereto, a governor shaft parallel to said spindle shaft, driving connections between the motor shaft and the spindle shaft, and driving connections between the spindle shaft and the governor shaft.

In testimony whereof I have hereunto subscribed my name in the presence of two subscribing witnesses.

WALDEMAR LINNE LINDGREN.

Witnesses:

CHARLES W. HILLS, J12, EARL M. HARDINE.

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