US1535825A - Nonset automatic phonograph stop - Google Patents

Description

April 28, 1925. 1,535,825

- .c. R. GOTSHALL ET AL NoNsE'r AUTOMATIC PHONOGRAPH STOP Filed May 16, 1922 2 Sheets-Sheet 1 d 'INVENTOR.

I A TTORNEY.

April 28, 1925. 1,535,825 7 C. R. GOTSHALL ET'AL NONSE'I AUTOMATIC PHONOGRAPH STOP Filed May 16, 1922 -2 Sheets-Sheet 2 ATTORNEY Patented Apr. 2.8, 1925.

UNITED STATES rarer CHARLES R. GOTSI'IALL AND RALPH S. SNYDER, 01E UHRIGHSVILLE, OHIO.

NONSET AUTOMATIC PHONGGRAPH STOP.

Application filed May 16, 1.922. Serial No. 561,359.

To all whom it may coucernfl Be it known that we, CHARLns It. G O'l SHALL and RALPH S. SNYDER, citizens of the United States, residing at Uhrichsville, 5 inthe county of Tuscarawas and State. of Ohio, have invented certain new and useful Improvements in Nonset- Automatic Phonograph Stops, of which the following is a specification.

This invention has reference to automatic phonograph stops and its object is to provide a stopping mechanism which will cause themachine to cease motion automatically when the end of the record is reached, and without any adjusting or setting on the part of the operator, and which may also be brought to a standstill at any desired point without affecting the operation of the stop in its automatic side.

In accordance "with the invention, there s provided the usual tone arm and sound box, which maybe of usual construction. The motor can be stopped at any time during the playing of a record by simply pushing the starting lever in the reverse direction from that used in starting it. The advantages in this is that if for any reason the operator should not desire to have the record playing to the end and stop in the regular way, he may stop it any time and yet not disturb the mechanism of the automatic stop.

This point is considered as important because there. is at least one other stop mechanism on the market that cannot be stopped in the middle of a record without throwing out the adjustment of the stopping device.

When the tone arm is lifted up and a quadrant constituting a part of the improved stop mechanism forces the fulcrum to move around until gears also employed.

moved back to resting or starting position, i

back to the starting position and this will not cause any trouble witlrthestop.

The reproducing stylus and stop mechanism will operate in from one to ten revo- .ltltlOllS of the turn table after the stylus has reached the last groove in the record. The tone arm when moving toward the center of the record also pushes a quadrant arm forming part of the invention, at the same speed asthe arm so that the quadrant arm and the tone arm move together, thereby maintaining the fulcrum, forming part of the mechanism, in a neutral position.

Because the majority of records has the last groove in the form of a complete circle, when the stylus reaches such last groove, it travels round and round without moving the tone arm or the quadrant arm any further. As there is no further progressive move-. ment of the quadrant, the fulcrum swings out of neutral position and trips the stop. It is this tripping operation. that talres from one to ten revohitions of the turn table, de-

pending on the kind of record, after the stylus reaches the circular groove.

There are records however in which the last groove is not a complete circle, but when the end of the record reached, the groove is in the form of a spiral approaching the center of the record with increasing speed, so that when the stylus reaches the new cut the speed of the tone arm toward the center of the record is increased, thereby increas ing the speed of the quadrant in the same direction. The travel of the quadrant therefore being faster than the travel of the fulcrum Wheel, swings the fulcrum out of the neutral position in a reverse direction and trips the stop. On this particular cut the stop will operate in from one to three revolutions.

The invention will be best understood from a consideration of the fOlloWiIlg detailed description taken in connection with the accompanying drawings forming part of this invention, with the understanding however, that the invention is not confined to any strict conformity to the showing of the drawings, but may be changed and modified so long as such changes and modifications mark no material departure from the salient features of the invention as expressed in the appended claims.

In the drawing Figure 1 is a plan View with some parts broken away, showing a typical form of talking machine with the stop mechanism also applied thereto and further showing in broken lines the location of the reducing gearing, within the case,

Fig. 2 is a section of a talking machine with the invention applied thereto taken on the line 22 of Figure 1,

Fig. 3 is a section on line 33 of Figure 2 showing a plan view of reducing gearing for application to the machine,

Fig. l: is a starting and stopping lever employed in the structure,

Fig. 5 is a cross section through a part of the driving gearing,

Fig. 6 is a cross section through the stop mechanism showing its application to the turn table, and

Fig. 7 is a partially broken away section through the turn table and the driving mechanism therefor.

Referring to the drawings, there is shown a body member 1 in which is enclosed and on which is supported the main portion of the talking machine.

Rising through the body member 1 is an upright shaft 2 carrying at its upper end a turn table 3, such as is usually employed in talking machine structures. These turn tables are usually hollow on the under face and consequently overhang the body memher 1.

Associated with the turn table is a sound box 4: carried by a goose neck 5 which latter in turn is carried by the discharge end. of a tone arm 6,, all as customarily provided in talking machine structures, and hence requiring no special description. The sound box 4-. is provided with the usual reproducing stylus 6 which also requires no special description. The tone arm 6 is mounted upon a pedestal 7 to turn thereabout in the normal operation of the machine, and connected to the pedestal 7 by a clamp Sis an arm 9 underlying and movable with the tone arm. Because of the clamp 8 the tone arm 6 and the arm 9 move together so that as the tone arm is actuated across the sound record disk, appearing at 10, in Figs. 1 and 7, and in actuating the tone arm at the same time actuates the arm 9.

it the end of the arm 9 remote from the pedestal 7 is a head 11 curved on an are described about the center of the pedestal 9 and preferably provided with a rubber facing 12 and engaging a fulcrum wheel 13 which may also be of rubber or rubber faced.

The needle traveling in the groove of the record, carries the tone arm toward the center and also pushes the quadrant arm 9 in the same direction.

lVhile the record is playing, the fulcrum and quadrant move together, this maintaining the fulcrum in the neutral position.

When the stylus 6 reaches the last groove (in the majority of cases), it travels round and round without moving the tone arm 6 or the quadrant arm 9 any further. However. the fulcrum wheel 13 continues to turn and as there is no further motion in the quadrant arm 9 the fulcrum swings out of neutral position and trips the stop, this taking from one to ten revolutions of the turn table, depending on the record, to complete the motion.

There is a pivot shaft 16 extending through the body top 1 and carrying a gear wheel 15 at its upper end above the body top 1 which meshes with the gear wheel 13 carried upon the same shaft as and above the fulcrum wheel 13 and imparting bodily motion about the shaft 16 due to the action of the gear wheel 13 about the pivot 141 through the arm 18, said arm being elastically centralized by opposed springs 19, 20, with the sprin 20 adjustable through the intermediary of the screw 21.

There is also a quadrant 22 with a stop notch 23 in its convex surface, in which may engage a stop wheel 2 1 carried by a lever 25 with a finger 26 at the end remote from the wheel 24. The lever 25 engages with the finger 26 in a recess 27 in a pivoted brake arm 28 carrying a brake face 29 adapted to engage the turn table 3 to stop it when desired.

The brake arm 28 is of the past-center type and urged to one side or the other of a center line by a spring 33 actuating the arm 28 to the respective sides of the center line as needed, and thereby throw the lever 25 into or out of engagement with the notch 23, to lock or release the mechanism.

' The quadrant 12 may be provided with either gear teeth or be rubber faced to engage the fulcrum wheel 13, since, in practice, either arrangement works equally Well to trip the stop.

What is claimed is 1-- 1. A sound reproducing machine stop device, comprising a tone arm and quadrant arm, and means for coupling them for simultaneous movement, a fulcrum wheel driven by the machine motor, a stop quadrant and driving means between the stop quadrant and the quadrant arm, trip means between the stop quadrant and the turn table gearing between the stop quadrant and the areshaped end or head, and trip means for 1 the record actuated by the fulcrum Wheel.

In testimony whereof, We aiiix our signatures heteto.

CHARLES 1:1. GOTSHALL. RALPH S. SNYDER.

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