US1560674A

US1560674A - Phonograph

Info

Publication number: US1560674A
Application number: US677735A
Authority: US
Inventors: Edwin F Driver
Original assignee: Individual
Current assignee: Individual
Priority date: 1923-11-30
Filing date: 1923-11-30
Publication date: 1925-11-10
Anticipated expiration: 1942-11-10

Description

E. F. DRIVER NW; l0, l925- wonnen/wn Filed Nov. 30, 192s 2 Sheets-Sheet 2 Patented Nov. 10, 1925.

UNITED STATES ymfriali'l* OFFICE.

EDWIN FDRIVER, OF CHICAGO, ILLINOIS. i

y Application med November ao, i923. l ser'iaiirmswjs.

The main objects of this invention are to provide' av phonograph of this type having improved mechanism for automatically moving the stylus intoand out ofcontact with the record, and at the end of each ,operation 1 restoring the stylus .carrying arm toits initial position; to provi e improved means for controllingthe starting and stopping of the phonograph motor.; and to proz vide an improved relative 'arrangement ofV l said mechanism and means.

An illustrative embodiment ofv this invention is shown in the accompanying drawings, wherein `Figure 1 is a. l`an of the honoofra h.

i. P P s P Fig. 2 is a side elevation lof the same.

Fig. 3 is a View similar to Fig. 1, 'but with the record audits supportremoved for the sake of clearness, and the driving shaft being'shown in section.

Fig. 4 is a section taken on the line 4 4 of Fig. 2. i n

'Figa` 5`is an enlarged detail of the mountingfor the stylus carrying arm.

In the specific embodiment illustrated, the invention is applied to a phonograph involving the use of a. pivoted stylus carrying arm, arranged to be movabler laterally across a rotatable record holder which is driven by suitable driving means, such as a small clock mechanism employing a spring motor. Improved control mechanism actuated by the driving means is provided for guiding the stylus into proper engagement with-the record and at the end of each operation disengaging it therefrom. and restoring the armto its starting vposition ready for another operation; v.The driving means is automatically stopped by animproved form' and arrangement of brake,

which is actuated by a rcam on the driving means when the control mechanism has re' stored the stylus arm to its starting position. The brake is manually releasable for starting each operation.

'from vthe drawings.

l Phonographs n embodying V this invention are adapted for use with various devices which are well'known in the art, and as a detailed description thereof is not essential to a clear understanding of the present invention these devices h avebeen vomitted 'y In the form shown, the phonograph comyprises a supporting frame l, on whichis rig# idly mounted a tone arm 2 havinga' diaphragm 3' trolled an improved constructionI and -ar rangement of control 'mechanism 5. The control mechanism 5 is actuated by driving lmeans 6, coacting with a brake element 7,Y

sov

connected to animproved form of 'stylus carrying arm 4, which iscon! which ismanually releasable for starting the '5 phonograph, and which is automatically actuatedby the driving means for stopping the device when the stylus arm has Vbeen restored to its starting position,A Mounted on the support 1 and driven by4 the' driving" means 6, is a rotatable'holde'r 8l forfsupporting a cylindrical 'sound reproducing recd 9.y i i Asfillustratedfthe supporting frame 1;.V comprisesy a pair of. plates 10 and 11 ar?` ranged in substantially parallel spaced relation and connected together by bolts 12.

The stylus arm 4 is bifu'rcated at its'outer end, as shown at v13, for' pivotallyy support-v ing a bell crank lever 14, whicli'is connected at one en'd to the diaphragm 3 by a wire 15,.

Mounted on vthe other end of the lever 14, is a jewelV tip 16, forA "engagement with` the record surface. Formed onthe inner end'i ofA the arm v4,'is apair of ears 17, which are' pivoted on a pin18, supported'in a yoke 19. The Vyoke 19 is also provided with a pair of ears 20, `pivoted on a pin 21,v supported in a bracket22, which' is rigidly securedto the supporting frame fl. The pins 18 and 21 are `arranged'at substantially'right angles-to each other, so as' to permit the arm A4 to swing laterally acrosstlie holder V8 and 4 A also toward and away from tlie'reco'rd. Ein-I. bracing thepin 18 'andi bearingl between yoke 19 and arm 4, isa helical spring '22.1, which is arranged tonormally urge the outer Vend of the arm 4 toward the. holder 8 for.

sliiftinghfthe stylus 16into engagement withV i the record;` lFormed on the yoke 19., isa

shoulder23, arranged in posit-ionV to coact with one part of the control mechanism 5 for rocking the arm 4 around the pin21 to restore the arm 4 to its starting positionk,

after the stylus "161 has been disengaged trom vthe record 9 by another part of the control mechanism..

The control mechanism includes yafmem-` ber 24 for shifting the arm 4'aWay from the holder 8 to disengage the stylus fromthe record, and a restoring element 25 actuated by said control memberfor restoring 'the arm 4 to its; starting position.

lThe member 24 is in the form of a lever .plivotally -mounted on the supporting plate 1:1 byapin 26, and having a portion thereoft extending at substantially right angles to said supporting plate to form: a guide 27 extending across the'record holder 8 in posiytion tocoact with the stylus arm 4, Jfor shifting said stylus arm awayk `trom l'the recordM at the end o'l' each operation.

-lormed at the ends of the guide 27 is a pair of shoulders 28 and v29 for limiting -the lateral -movement of the 'arm 4, so Aas to retain the stylus Vvin proper relation to the record. Formed on the member r24, is a cam element' 30, projecting ltlnfough a slot 3l in the supporting plate ll, so as to be located Y in position to eoact With the driving means of the` arcuate element.

5 for actuating the control member '24, Which in turn actuates the restoring element 25. Movement of ythe :lever 24 toward the reco-rd 1. holder 8 is limited by a pin 32,k mounted on the supporting plate ll. e Y

The 'restoring element 25 is'in the form of an arcuate plate having slots 33 for slidably engaging pinsr34, mounted on the support-Y ingy plate 11, whereby said element is slidable on said' support through an arcuate path. One end Vof the element 25 is-provided With a lug 35 arranged imposition to abut against. the member 24 When the latter isactuated by the driving means. Formed 'onthe other 'end of the restoring-element 25, is a shoulder 36,. adapted tofcoact with the yshoulder 23 of lthe yoke 19 for restoring the stylus -a-rm, When said arcuate element is actuated by the control member 24.

Mounted on Vthe supporting plat-e 11, is a "spring37, coacting With the arcuate element 25,4501 normally urging said element and the control. lever l24 into position to release the stylus arm 4. The arcuate element 25 and control lever 24 are relatively arranged Aso ernor 39 connected to the record holder 8 by a `train* of gears numbered 40 to 46 in* elusive. `The'rec"ord"`holder 8 is mounted on a sleeve 47, on which the gear/46 is fixed and which is rotatable on. a'winding Yspindle 48 connected to the inner endl of they spring 'motor '38. Mounted onsone; side 'of the .gear

40 is a stud 49,l `forming a cam adapted. to.

engage the cam surface 3Q of the lever 24 for actuating the control mechanism 5. Mounted on the opposite side ofthe gear 40, is a stud 50, forming a cam adapted for engagement with the brake element 7 for stoppingthedriving means. The studs 49 and 50 are relatively arranged so that the stud 50 does not engage thel brake element 7 'until the control mechanism 5 "has restored 'the stylus arm to its starting position.

The speed of the ,governor 39 is controlled by an adjusting screw 5l, adapted to adjust ,the tension of a 'friction pad 52, Which bears against ay disk of the governor. The governor 89 also includesa hub y54,. for engager ment with the brake element 7.

The brake element 7 is in the (form of aV bell'crank lever Apivotally` mounted on the inner face ot the supporting plate ll by a stud 55'. Formed on one end off the leverf7,

is a brake shoe 56,. adapted to be shifted into and out of engagement with the hub 54 of the governor for stop/ping andL starting the l driving mechanism. The lever'7 is normally urged into position for releasing Vthe bra-ke shoe by means of a spring 57, mounted on the supporting .plate ll and connected to said one end of the brake element. rThe other end of Vthe brake element 7 normally extends into the path of the cam 50,. so as vto be actuated thereby for lautomatically rocking the brake shoe 56 into engagement Wilththe governor against the action of the spring 57.

The brake lever 7 is manually releasable from the cam 50 -for starting the phono` graph by means of a .pin 58, slidably mounted in the supporting .frame l and having fixed t'hereonva lug 59, Which is arranged so that when the pinV 58 is depressed, the lug 59 engages the end of the lever 7 `so 'as to lieX it out of the .pa'th of the cam, 50, kthereby permitting theI springv57 to pull the -brale shoe V56 away from the governor hub `54. The lug 59 is provided with an aperture'O which slidably engages one of the bolts yl2 of. the supporting iframe for vsecuring 4the pin against turning.

In operation, when the brake lever 7has .been released by the. depression of the zpin 58, the driving mechanism 6v starts under the action of the spring motor 38, and as'the lli) cam 49 moves away from the cam surface 30, the control lever 24 and the arcuate element 25 are moved under the action of the springy 37 into position for releasing the stylus arm 4, which thereby moves under-the action of the spring 22.1 for shifting the stylus into engagement with the record.v When the stylus reaches the end of the record groove, the cam 49 moves into engagement with the cam surface 30, thereby rocking the control lever 24 and its guide member 27 away from the record holder so as to disengage the stylus from the record. After the stylus has been disengaged from the record, the control lever 24 actuates the arcuate element 25 Jfor restoring the stylus arm 4 to its starting position, whereupon the cam 50 moves into position to rock the brake lever 7 so as tok shift the brake shoe 56 into contact with the governor, thereby 4stopping the driving means.

Although but one specific embodiment of this invention has been herein shown and described, it will be understood that numerous details of the construction shown may be altered or omitted without departing from the spirit of this invention as defined by the following claims.

I claim:

l. A phonograph comprising a support, a record holder rotatably mounted on said support, means for driving said holder, a pivoted styluscarrying arm adapted to rock laterally of said holder to permit the stylus to travel across the record in one direction and being movable toward and away from said holder for shifting the stylus into and out of engagement with the record, said arm being normally urged toward said holder, a control arm pivotally mounted on said support and adapted to coact with said stylus carrying arm for retracting the latter, vsaid control arm being actuated by said driving means, and a restoring element slidably mounted on said support and arranged to coact with said stylus carrying arm for shifting it laterally across said holder in the opposite direction, said restoring element being actuated by said control arm.

2. A phonograph comprising a support, a record holder rotatably mounted on said support, means for driving said holder, a pivoted stylus carrying arm adapted to rock laterally of said holder to permit the stylus to travel across the record in one direction and being movable toward and away from said holder for shifting the stylus into and out of engagement with the record, said arm i being normally urged toward said holder, a control arm pivotally mounted on said support and having a part forming a guide member arranged to limit the lateral movementof said stylus carrying arm and adapted to retract said arm for disengaging the stylus from the record, an arcuate element slidably mounted on said holderand adapted to shift said stylus carrying arm laterally across said holder in the' opposite direction, said arcuate element being adapted to be actuated by said control arm, a spring coacting with said arcuate element for normally urging said element and control arm into position to release said stylus carrying arm, and a cam on said driving means adapted to engage said control arm for actuating said control arm and arcuate element against the action of said spring. l y

3. A phonographcomprising a support, a record holder rotatablymounted on said support, means for driving said Vholder,a

pivoted stylusv carrying arm adapted to rock laterally of said holder to permit the stylusto travel across the recordin one direction and being movable toward and away from said holder for shifting the stylus into j and out of engagement with the record, said arm being normally urged toward said holder, a control arm pivotally mounted on said support and having a part forming a guide member arranged to limit the lateral movement of'said stylus carryingarm and adaptf ed to retract said arm for disengagingy the j stylus from the record, an arcuate element having a pin and slot connection with said support and being actuated by said control arm, a shoulder on said arcuate element adapted to engage said stylus carrying arm for shifting it laterally acrossr said holder in the opposite direction, said control arm andl element being relatively arranged so that said element is actuated only after said control arm has lmoved a predetermineddistance, a spring coacting with said arcuate element for normally urging said element and control arm into position to release said stylus carrying arm, and a cam on said driving means adapted to engage said control arm for actuating said control arm and arcuate element against the action of said spring.

Signed at Chicago this 27 day of November 1923.

EDWIN F. DRIVER.