US1419164A - Nonset stop for phonographs - Google Patents

Description

w. o. MEISSNER. NONSET STOP FOR PHONOGHAPHS.

APPLICATION FILED FEB. 28,192).

Patented June 13, 1922.

2 SHEETS-SHEET l.

W. 0. M'EISSNER.

NoNsET sToP FOR PHoNoGRAPHs.

APPLICATION FILED FEB. 28, 1921.

1,419,164. mmm@ 13, 1922.

2 SHEETS-SHEET 2.

fam/2752' tilttiil STATS,

WILLIAM: O. MEISSNER, OF CHICAGO, ILLINOIS, ASSIGNOR 'IO STERLING DEVICES COIVIIANY, OF CHICAGO, ILLINOIS, .A CORPORATION OF ILLINOIS.

NONSET STOP FOR PHONOGRAPHS.

Specification of Letters Patent. .Patentd Jun@ 13, 1922.

Application filed February 28, 1921. Serial No. 448,411.-

To @ZZ whom t may concern:

Be it known that I, WILLIAM O. htlnrsa NER, a citizen of the United States, residing at Chicago, inthe county of Cook and State oit Illinois, have invented certain new and useful Improvements in Nonset Stops for Phonographs,` of which the following is a specification.

My invention relates to phonographs and comprises a stop for terminating thevtravel of the record when the stylus reaches the end of the sound groove.

The main objectA of my invention is to stop the travel of the table by the cessation of stylus travel across the record and independently of the distance actually traveled thereby.

Another object ot my invention is to secure automatic operation of the stop mechanism without special attention when a record is started.

As I attain the main object mentioned by means of a mechanism which is actuated by the transverse movement of the tone arm, and as such movement results 'from the feeding ot the stylus by the spiral sound groove, which is very delicate, an additional object or' my invention is to provide mechanism which oli'ers minimum resistance to the movement ot the tonearm.

An additional object ot my invention is to combine my automatic stop mechanism withA the manually controlledy stop `usually provided adjacent the record turn table so that the former functions through the latter and only one stop need be released when the phonograph is to be operated.

.Tn the accompanying drawings which il.- lustrate a preferred embodiment of my in' vention- Fig. 1 isa top view of my device assembledy with the tone arm ot' a phonograph, and showing a part oit the phonograph mon tor and' turn table with a record on thel latter.

Fig 2 is a front elevationy of my device attached to the tone arm.`

Fig. 3 is an enlarged top view ot my device showing its main operating. parts in a different position from that indicatedl in Fig. 1, and f Fig. 4c is a view and section taken on line 4.-4 of Fig. 3.

In these' drawings the phonograph. motor is indicated at 2, the motor board at 1, the turn table at 3, and the tone arm at twith its base mounted onboard 1. The tone arm is equipped with a reproducer 6, having the stylus 7. The above mentioned parts are ot usual construction and operate in. the usual manner. the stylus 7 and tone arm move from right to left across the record.

My stopping mechanism consists, briefly, in a spring operated brake shoe 8, tending to engage the edge of the record table, but held in disengaged position, during playing ot' the record, by a catch adapted to be released by a device which will function when the tone arm ceases to move from right to left. The energy which operates this mechanism is provided by the movementv of the tone arm and is stored during such movement and is released when the movement ceases.y

The brake head is provided with/a rearwardly extending bar 9 the lower portion of which has a downwardly extending pin 10. A. horizontal plate 11 is pivotally mounted on motor board 1 by means of a flat spring 12, which tends to raise the tree end of' plate 11. The latter end of the plate is provided with a separate piecek 10LL having an opening 13 adapted to receive and' retain pin 10 when the latter is moved withl bar 9 andy brake 8 tothe inoperative position of the brake indicated in Figs. 1 and 2.

Adjacentbrake S is a vertical shaft 14 which pivot'a-lly supports a horizontal arm 15, the outer end' ot which forms a sleeve 16 for a cylindricalv weight 17 having a sliding fit in the sleeve. A spring 18 has one end secured to the side of lever 15, eX- tends therefrom toward shaft 14 andis there bent to eXtend outwardly past and adjacent pin 17 but tending to move away l-rom the latter. Frictional 'contact of the free end of spring 18 with weight 17 will hold the latter in suspended position in sleeve 16. This contact is provided by pres sure applied through a pin 19 onfone end ot a rod 20, the other end of which is pivoted on a bracket 21 mounted on. tone arm 4..

Pin 19 entends through a hole in arm 15 which is large enough to permit some relative movement between arm 15. and rod. 20.

The tendency of spring 18,.when com- As the recordy is played,v

pressed, isto move arm 15 to thefleft. and y thus free Weight 17 from its trictional engagement but this tendency is resisted by the rictional contact between arm 15 and a collar 22 secured toshait 1s. This frictional contact is privided by a coil spring 3, the pressure of which may be accurately controlled by a nut 24k screwed on the upper threaded portion oi shatt 14tand having a locking device here shoivn as a screw 25. While shaft 141; may be trictionally driven by arm 15 to rotate in a clock-Wise direction, the speed oi' its rotation is limited by a train of gears 26 terminating in an escapement device 27. `The speed of the shaft permitted by this mechanism is less than that which would be caused by the tone arm induced movement ott arm 15 if the latter were pinned to shaft 11i.` rlhus pin 19 is always pressing spring 18 against Weight 17 during the movement of the tone arm.

When the tone arm ceases to move from right to left the energy stored in spring 18 continues to niove arm 15 to the left until pin 19 engages the outer edge ot the hole in arm 15. But as soon as this movement starts, spring 1S will be moved away from Weight 17 andthe latter will drop onto plate 11 forcing the plate downwardly and disengaging pin 10, permittingthe brake spring 9a to set the brake and stop the record table. An inclined plate 28 is mounted on the mechanism base plate inthe path ot travel ot sleeve 1G and Weight 17. 'lfilhen the tone arm is moved from lett to right Weight 17 rides up inclined plate 28 and remains on the upper portion thereof` during the initial playing movement of the tone arm during Which time it is trictionally engaged, by

spring 18 and consequently held in raised position after movement of the tone arm carries arm 15 and Weight 17 beyond the upper portion of inclined plate 28. lfilhen brake shoe 8` is retracted by manual movement of nger 29 on the brake head, hole 13 automatically catches pin 10. lt is theretore apparent that my stop will function Without any attention as thevarious parts assume their necessary positions automatically When a person performs the customary actions required for playing a record.

When my invention is properly made, the resistance of spring 18 is very small and the friction between arm 15 and collar ez;- ceeds the resistance ot spring 18 very slightly. The connection of bar 20 to tone arm Zlinear the base of the latter affords the record grooves a considerable leverage in feeding the stylus and tone arm across the record and in practice, the resistance to the tone arm movement is scarcely perceptible.

The mechanism illust-rated Will be provided ivith a suitable housing and `it my invention forms part of the standard equipment cfa machine, its housing may form an integral part'of the tone arm base. The

particular form of housing, however, forms no part oit my invention and is not shown or claimed. y

It is a growing practice to operate phonographs by electricity and it is obvious that in installing my invention on a phonograph so operated, the movement of arm 9 may serve to open and close a switch instead ot moving a brake shoe to and from a moving element. y

l am aware that changes in the form and construction of parts and details of construction maybe made Without departing from the invention or sacrificing the advantages thereof and l reserve the right to malte all such changes and modilications as fairly fall Within the scope of the following claims.

I claim:

1. The combination of the tone arm and motor brake of a phonograph, with spring mechanism adapted to receive and store energy from the movement oi' the tone arm While a record is being played and to expend the stored energy, upon the cessation of tone arm movement, to set' the motor brake.

2. The combination of the tone arm and motor of a phonograph with an energy storing device comprising a compressible spring, means whereby the tone arm, while moving, stores energy in said device and prevents release oi' such stored energy, and mechanism operable by release of such stored energy to stop the operation of the motor.

.3. ln a phonograph, a record turn table, a brake therefor, an element for applying said brake to said table, a device for holding said brake to said table, a device for holding Said element inoperative, a tone arm, and mechanisml energized by movement ot said tone arm to function, after movement oi? said tone arm ceases, to release said element from said device. l

l1. The combination of the tone arm and turn table of a phonograph, with `an energy storing device operated by movement of the tone arm, a turn table brake, an elementholding said bralre inoperative and means actuated by the energy stored in said device for releasing said brake from said element.

5. The combination ci the tone arm and turn table of a phonograph, with an energy storing device operated by movement of the tone arm, a turn table brake, an element holding said brake inoperative and means actuated by the energy stored in said device for releasing said brake vfrom said element upon cessation of the tone arm movement.

6. The combination of the tone arm and turn table of a phonograph, with an energy storing device operated by movement of the tone arm, a turn table brake, an element holding said brake inoperative and means operable by saidV device Yfor releasingsaid brake from said element.

7. 1n a phonograph stop, a turnY table brake, an element holding said brake inoperative, a pivoted arm, an energy storing device on said arm, mechanism operable by energy stored in said device to move said arm, mechanism actuated by suchmovement of said arm to release said brake from said element, and means whereby energy is stored in said arm by movement oi' a phonograph tone arm.

8. A phonograph non-set stop comprising a brake adapted to stop a record turn table, a catch adapted to render said brake inoperative, a weight, a member, movable by a tone arm and adapted to suspend said weight above said catch while being so moved and to drop said weight upon said catch to release said brake from said catch when otherwise moved, and means for moving said member independently oi a tone arm.

9. A phonographnon-set stop comprising a brake adapted to stop a record turn table, a. catch adapted to render said brake inoperative, a weight, a member movable by a tone arm and adapted to suspend'lsaid weight above said catch while being so moved and to drop said weight upon said catch to release said brake lrom said catch when otherwise moved, and means energized by movement ot' a tone arm.

IO. The combination with a phonograph turn table and a tone arm, of a turn table brake, a catch preventing application of said brake, an element adapted to release said brake from said catch, a member adapted, when moved by the tone arm, to render said element inoperative but not so adapted when moved otherwise, a connection for moving `said member by said tone arm, and other means for moving said member.

.11. In a phonograph stop, a second turn table brake, a brake restraining element, a compressible spring, a device whereby the phonograph tone arm may compress said spring, a member, adapted to release said brake from said element, held in inoperative position by said spring when the latter is compressed, and means providing for the expansion of said spring when playing travel of the phonograph tone arm ceases.

l2. In a phonograph stop, a second turn table brake, a brake restraining element, a compressible spring, means whereby a tone arm during its plaving travel may compress said spring, a weight held in suspended position by said spring when the latter is compressed, means adapted to permit expansion of said spring when playing travel of the tone arm ceases, said weight, when released from said spring, being adapted to render said elementy inoperative.

13. In a phonograph stop, a turn table brake, a brake restraining element, a pivoted lever, means carried by said lever adapted to release said brake from said element, a spring carried by said lever which, when compressed, holds said means inoperative and tends to move said lever upon its pivot, a member adapted to be moved by a tone arm t0 compress said spring, and mechanism operated by the movement of said lever to store energy which continues the movement of said lever after movement thereof by said member ceases and thereby releases said means from said spring.

14:. In a phonograph non-set stop, in combination with the pivoted tone arm of a phonograph, ,a member pivoted similarly to the pivoting of the tone arm, a connection between said member and thetone arm so that movement of the tone arm moves said member, a weight mounted to slide vertically on said member, an inclined track adapted to raise said weight when said tone arm moves said member in one direction, an element on said member adapted to hold said weight in raised position while said tone arm is moving said member in the opposite direction and to releasek said weight when said tone arm ceases t0 function, and means actuated by release of said weight for stopping the phonograph.

WILLIAM O. MEISSNER.

Images