US2614674A - Electric control for phonographs - Google Patents

Description

OCL 21, 1952 L. J. ANDRES 2,614,674

ELECTRIC CONTROL FCR PHoNoCRARHs Filed Jan. 1e, 1947 27./ f "y, 7 J3 y?) *Patentedcom21; 1952 'I c 2,614,674; Y. s @ELECTRIC CONTROL lrolt' rHooeRA'Pi-rs' j f* Illinois My present"inventiorrrelates 'in general'to' electi control apparatus .for .automatic 'coin-oper- `ated' phonograph's "'or'smilar devices` and more particularlyto an 'electro-'magnetic selecting sys'- intlfiereior' possessing the'featuresof improveniniherenafter pointed cui.'v

" cieirigseieciingsystems previous i'oihis invention have 'generally 'been subject' to/ unauthorized 'or improper operation in various Ways, 'such 'as by manipulating'thef usual push Vbuttons `in an unintended manner or setting up other conditions VWhiclfi-.would ymake itpos'sible to cause operation of 'the-*device v without insertion of proper or sufcientcoins. `Many attempts have been made" to provide' protective' devicesv invone kor more o f the circuits to overcome these defects,

but the addedfcomplexity involved often resulted `i VVin thev,mechanical failure of the device in Inormal [operation 'f 'Ihe rpresent' invention solves this p'roblemina simple -and'direct manner'and the 'be' cheat-proof 'and' fool-#proof in operation regardlessof the -seq'lenoe or manner inrwhich the Ic introls aremanipulated.'

A piincipai' Qbjectofiiie invention is 'the 'pievi-` selected given -n'mberv of i the controlling electro-v magnetsfmay beenergized upon the deposit of a corresponding number of coins. i

Another object is the prcvision'in siich an a'p- I paratus of means' r*forr applying an 'electric 'puls/e o fffshortduration to said electro-magnets when they arey to lbe energized, controlled by asirnpie 'tijnevdelay relay orlil'iedevice.

`Awful-ther:objectjisthe provision of an electro' magnetic `computing `device whereby the vprede` 'termined value of coins inserted maybe registered ifi; combination with 12.631157 wmf-@byA e 'selected group of'` electro-magnetic devices, corresponding with thevalue of the-coins inserted,

maybe energized.

nother Lobject, which is important from the standpoint ofweconomy and simplicity, .is theprovision", ofvmeansvvhereby a Vgiven number of controlsWtches-will operate a like" given number of electro-magnets with not more than half of .thatnumber'of'conductors running from the said "rsiwitchesto the said electro-magnets'.` Other objectsfand advantages of the invention Will.r be apparent'A from the following'specifioation.

and drawingsjin-:Which:

` KwFig.l l is a..diag'rammatic View of the'circut landits. associated elements; and f in" aia' drawings ilnavesi'itwii, wenn@ @and line V,enclosuregb; y; a conventional` add-'subtract unit; including Vav credit-wheel flfmovable inflone direction, one step'vforfeach, coin depositec1 ,jandv inthe other direction', `one step foreach; record played' 'or 'eachunit of servicefrenderedi The wheel' is urged inthe direction'lshown bythe y arrow by a spring 2, and a -pivotally mounted escap'ement lever' 3 is lpositioned -toalternately vengage the teeth of. said Wheeli- A spring -fholds said escapement lever normally in v itsifrest' posi;- tion shown in thedrawing. Y c

The primary of 'a-transformer Fris connected .to p'ow'er linesl'Ll "and L2 and a low"-voltage secondaryjof said transformer is utilized toisup.- ply the circuit with electric energy through rpower conductors E andrl." t `A conventional? coin' vswitch 8, 9,*. shown 1 in :a

dotted' line 'enclosure a; isl c'i'n'nnected.v to: faecoin ilapp'ara'tusr providedthereby' has been found to y v'sior'r of electro-magnetic means whereby'pnly a.A

" additional teeth corresponding4 to thenumbr'" of magnet IU: by'a conductorrlzZ, 13 and-ftothewline 'l by a conductor 14.1: Said .-magnetis connected by a conductor ll .with thev 1in'e'6. liIt'fvi/illvbe apparent that th'gdeposit of a coinv I5Wil1 mo-k mentarily close the normally open switch 8 r9'and' energizesthe -magnetf 'l0 Lto 'attract :the 'f escapement lever Sand cause the'zwheel l to advance 4onetooth, and thatthed'eposit of vvadditional-coins will cause `said vWheel 'to advance `a number. :of

suchvooinsdeposited.

v`YA?pivotally mounted restoring'r leve'r 4I 6; having a pawl H pivotally attached tooneend thereof in''oper'ativ'erelati'on to thefteeth of the whel I, is normally held` out? of engagement lwith said teeth by. aspring 18,1y With 'a" tail part oflthe'fpawl resting a'gainst'a fixed'stop I9'. An electromagnet or solenoid.v 2B havinga core 2 I'to whichthelever I6 lis pivotally attached will move the'leve'r IB in'a downward "direction when 'saidfmagretfis energized and` the pull thereof overcomes y'ftlfe i -action of the spring I 8; causing the pawl""|1`='to y engage an adjacent tooth von the Wheel When the magnet zu ieee-energized, the sprin'gf ifs-will 'return the lever` I6 c ausingthepawl VIfllto move the wheel fi a dist'ar'icev equal to one tooth'in the direction; `,Opposite that Y indicated? by thearrcw. The escapement means on thelever 3 Willreta'in the wheel 'inf the restored position.

A switch 22,v 23 is positioned io be heifidpeii-by said lever` I6 when it is in its normal re'stfposition and to automatically close whenffsa'idlever is loWered as Ajust'described.y i "Vf if 1A rela'ycompifising electro-magnetsiill' an "25, disposed a)at right angles tofeachother",l and'-'1ntei" iocking-z armatures ireland-:f 21; is' piviuafrr controlling the magnet 20. Said armatures are retained in their normal inoperative position, shown in Fig. 1, by springs 28 and 29, respectively, and a normally open switch 36, 3i is so positioned withrespect to the armature 21 that it will be closed when the magnet 24 is energized and attracts the armature 26, thereby releasing `said armature`21 from the armature 26 and permitting it to be moved under the influence of its spring 29 to switch-closing position;

A plurality of electro-magnets, shown in two groups, marked, respectively,` 32 and 33,repre sent the controlling elements in the Adevice to be operated, as, for example, selector mechanism of an automatic phonograph, and are shown within a dotted line enclosure c.

A plurality of push button-operated singlepole, double-throw switches arranged in two groups, the switches of one group each comprising elements 34, 35, 36 and those of the other `group' eachcomprising elements 31,38,v 39, are

`shown in a' dotted line enclosure d, these ytwo groups of-Aswitches corresponding, respectively, to the twogroups of Amagnets 32 and 33. The central poles, 35 and 38,-respectively, of these switches are operated by individual push butvtonsrepresented in the drawings merely by arrows.

f Al bar 4Ull,which isoperated by depression of any one of the push-buttons of the first group 'ofv'switches serves to'close a switch 4 I, 42, thereby energizing an electro-magnet 43 of a switch- 'ingirelay whichfincludes 'a two-position armature'switch 44, `45, 46.1 Blades 44 and 460i said Iswitch are n'ormallyheldVv in contact by a spring 41.

A master switch 48, 49 is positioned adjacent the credit wheel Iand is controlled by a pin 59 :on said wheel. .The .bladesY of 'said switch'are biased toward closed position and the pin 5i) vliold'slrthe switch blade 49 out of contact with blade 48 when .the wheel is in its initial position.

A.ztime-de1aywrelay. comprising an electrom'agne't 51I-and apair' of switch blades 52, 53,

which are normally held open by a springv 54, is .connected to/operate' the electro-magnet 25 of the above-described interlockingl relayv in manner tov be hereinafter explained..

' Theimaster switch 48," 49 is in the power. line 6 and the latter runs to switch blades 3.I, 53 and 42 and tothe blade 35 of the rst of the push button switches 34, 35, 36.

r Blade 45 of the switch 44, 45, 46 is connected to.v one 'terminal of each ofA the'magnets 32 bya l'conductor 56 and blade 46 of said switchis connected to one terminal of eachof the magnets 33 by a conductor 51.

Switch bladel 30 is connected to the second terminal of magnet by conductor 58; switch blade 52 is connected to the second terminal of `magnet by conductor 59; switch blade 23 is connected tothe second terminal of magnet 5I `61a and the last of the second series of switches 4 is connected withthe conductor 6I by a conductor B'b.

If the operator depresses blade 38 of the rst switch of the second group to energize the rst magnet of the second group, the series circuit to the remaining switches of the secondr group,

which is normally maintained through the con- I ductors 6l, willi be brokenv and, by :virtue of the normally closed'svvitch 1I, 12, a conductor 55h,

a conductor 55C, and the electro-magnet 24 to the power line I. v

Simultaneously with the energizing of the first magnet 33, the magnet 24 will attract itsi armature 26 and release armature 2'I. which will then close the. switch 30, 3 I This will energize magnet 29 which will then pull arm I6 to itslowermostA position where it willv remain luntilf the magnet 29 is de-energized.r vIn moving to said lowermost position the lever I5, through an arm 'I3 depending therefronn will-depress the Vswitch blade l2, thus opening'the circuit to the magnets 32 and 33 and preventing :any possibility cfa secondone of said magnets being energized until the restoring operation has been completed and the arm I6v has returned toits upper position.

When the push button-operatedblade 38 isereleased, said blade 38 and theblade 39 will complete a circuit through conductors-6l, 6'Ib and 6I and through the then closed switch 22, 23 to energize the time delay relay -magnet 5I thereby closing. the switch 52, 53. .This energizes-the re-V storing'magnet 25 which thereupon returnsithe armature 2l to position .to;.interlock. with. the

armature26 which has previously been released by the magnet 24'as above described. The switch 39, 3I..wi1l .then openand de-energize-the magnetvZ, permitting the spring I8 toA return lever I6 to its normal rest position.. `During thismovement the pawl I 'I willmovethe. wheel Lone step in the direction oppositethat indicated -by the arrow on said wheel. l

When the arm I6 is thus returned to its normalposition thevswitch 22, 23 will beopened, thereby de-energizing magnet 5I and opening switch 52, 53 to deeenergize-"thev restoring magnet 25. Under these circumstances all ofthe apparatus is in the position shown in Fig. 1 except that the switch yIIB, 49 will remain closed `if more than one coinhas been inserted, as the pin. 50 will then be one tooth or more away from contact with the switch-blade 49. j.

If the operator depressesvbladef35 of one of the switches 34, 35, 36 ofthe rst groupthe bar 49 .will be moved and caused to close switch 4I, 42,

magnet 32 corresponding to theswitch whichli'as been operated. Since the magnets 32 arerconnected through conductor 56, switch 45-'44,'con'- ductors 55 and 55a, switch 1I, 'I2 and conductors 5519 and 55e tothe magnet124, and through the latter to the power'line 1, thegmagnetf24 ;will

' previously described.

germer Wliemthe#wheell ret-urns to its initiall position the pin D thereonwillcontact `the blade 49 of the master switch"`48',49"and'break its contactwith the :blade 48; f'thus "completing-1 a cyclelof operation.

While a blade--38gor-.n35fas vthecaserinight be, iS in depressed position the series circuit through the conductors 61 is brokenth'us preventing the"- ne?? 3901 anofmerI switchw Furthermor' th e mees/witch y1|=,`-'12-ssanincident ing operation renders it impossible to maintain a second circuit during such operation by manipulation of push buttons. It therefore will be apparent that an operator can energize only such number of the magnets 32 and 33 as correspond to the number of coins deposited; or, in other words, that it is impossible to effectively energize more than one magnet upon deposit of a coin of Vsingle unit value, regardless of how the push buttons or any other part of the mechanism may be manipulated.

As above indicated it is also an important feature of the invention that only half the number of conductors 64 are required as the number of magnets 32 and 33 to be energized. This is pare ticularly advantageous where the switches 34-36 and 31-39 are located at a distance from the magnets, as is required in the remote control of phonograph mechanisms.

It will also be apparent that, utilizing the alternate means of switching shown in Fig. 2, the relay 43 and its associated switches 4I-42, and

44-45--46 may be eliminated by the use of switches such as that shown at 68, 69, l0, and that, with this arrangement, more than two groups of magnets may be operated fromcorresponding groups of push button switches, provided multiples of the double throw switches 68, 69, 10 are utilized in connection with each group of push button-operated switches. For example, four pluralities of electro-magnets'may be energized from four pluralities of push button switches, utilizing only a single corresponding plurality of connecting conductors.

Ordinarily if the switch 22, 23 were accurately adjusted it could be utilized to directly energize the restoring magnet 25. However, it is possible that the switch blades 30, 3l may not stay closed y for a time suiciently long to permit the magnet 20 tomove the wheel restoring lever I6 its full range. Hence, it has been found that the insertion of the time delay relay which includes magnet5l and switch blades 52, 53 will in all condi- .tions of operation permit the lever I6 to move its full range'. With this simple construction an electric impulse of short duration may be applied to the magnet 32 or 33 to be operated, as by a quick operation of one of the push buttons,

and the magnet 20 will nevertheless remain energized long enough to perform its function.

The foregoing detailed description has been lgiven for clearness of understanding only, and

no. unnecessary limitations should be understood therefrom, but the appended claims should beV mori connections onefrunningfroreach said. and second?plurali-tyA of ele'ctromagiresto-saidl* electricswtich' jme'ans', 'the-remaining' t r'riiinalfo the electron-1'agnets'f"I f s'aidlrstpluralit being c'ir'ir'iecjteel'l' withf-'a *corresponding :remain mg terminarV pfeaciif off they feietremaglnetsffo theseeoiid piuraiity,' each switch/.inthe erst piu spnciig "switchfiffftie'f' second pluraiity of switches, conductors running, respectively, from each electromagnet of said first plurality of electromagnets to the corresponding switch of said rst plurality ofvswitches, and means for connecting the switches of the second plurality to said tric switches corresponding in number and order to said electromagnets, electric switching means responsive to the initial movement of any switch of said first group, one of the terminals of each electromagnet in they first group being connected to a' common conductor leading to one contact of said switching means and one of the terminals of each electromagnet of the other group being connected to a common conductor leading to another contact of said switching means, the remaining terminal of each electromagnet in said first group of electromagnets being connected by a separate independent conductor tothe remaining terminal of each said electromagnet in the said second group, separate conductors, respectively, connecting said electromagnet of said first group with each switch of said first group, branch conductors connecting said last-mentioned conductors, respectively, with successive switches of the second group, thereby connecting each `electromagnet of said Vsecond group with its corresponding switch in the second group, a source of electrical energy, circuit means connecting said electric switches and said switching means and said source of electric energy, and

means whereby the manual selective initial operationlof any of the switches ofthe first group will vfirst operate said switching means to partially complete an electric circuit to said rst group of electromagnets and whereby the further movement of vsaid selected switch will energize, through a portion of said circuit means, an electromagnety corresponding with the said switch, and whereby the selective operation of any switch in said second group switches will establish, through a corresponding separate conductor, a circuit t0 i an electromagnet of the second group corresponding with said switch.

3; In a selecting system for coin-operated phonographs, aseries of electromagnets to be selectively energized, a series of switches selectively operable to energize said magnets, a source of power, an add-subtract coin control unit for connecting said switches and magnets to said source of power so that subsequent operation of selected switches will energize corresponding magnets, actuatingA means and a coin-controlled escapement device for causing entering operations of said add-subtract unit, said switches being electrically interconnected through the operatable element thereof whereby operation ofone-of saidswitcliesy L disconnects the othersfrom said sourceof power, and means controlled by the return movement of the actuated switch 'for Vcausing a restoring op erationgof said add-subtract unit, said last-mentioned` means including an actuator for said unit, a solenoid for controlling the operation of said actuator; Va, switch for controlling the supply of current to. said solenoid, a relay comprising a switchfopening magnet, Va switch-closing magnet and` interlocking armatures controlled thereby, l and a vtime delay relay, including a switch and a y controlling magnet therefor controlledby operation of said selectively-operable switches, for controlling `the supplyv of current to said switchopening magnet to therebycause completion of said'restorng operation even though the electric.

impulse resultingfrom actuation of said switch should be of too brief duration to otherwise coml plete such operation. f

REFERENCES CITED The following references'are of record file of this patent:

McCauley Jan. 24, V1950 LLOYD J. ANDRES'- in the

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