Патент USA US2411754код для вставки
Nov. 26, 1946. M. J. PIFER ET AL 2,411,754 SEQUENCE TUNER Filed July 4, 1945 70 3 Sheets-Sheet 1 I‘ I Z, 40 43 , 72‘ 7/ . 76. 73 > 75175§ ,5- ' 75 .742 75a :20 202 341 25 4-7 33 5/ .92 73 412" - 4320 65 44 1 , I 242077 72 LI 7 93555 73a Q? 225 3 ‘ .750. 755 20a 25’ 3. ' 77 2/ BY (P. Q‘ ATTORNEY‘ 69 Nov. 26, 1946. 2,411,754 M. J. PIFER ET AL ISEQUENCE TUNER Filed July 4, 1945 3 Sheets-Sheet 2 42 :39 353754 40 Z5’ ‘ 44h ‘ V . Twig‘ 4 3a @ Q2 22a 2 1| 204 i @ 565 ' O 77 7 O a '. w 67¢ , .615 i159 5- \ |67 Z570 Q| ' 672 1%‘! ‘ 58 15a" , 5% 565 ~ ' 65 641 7" 546 54 .55 56 ‘57 I BYCiQM ATTORNEY Nov. 26, 1946. M. J. PIFER E-TAL, 2,411,754 SEQUENCE TUNER _ Filed July 4, 1945 1713. 7. 73 49 $797!?- 25 36 3 Sheets-Sheet 3 i6 59m 742d a 74‘, 74b BY 0. Q 39c 5 68 20 Patented Nov. 26, 1946 2,411,754 UNITED ‘STATES PATENT ‘OFFICE ~ 2,411,754 SEQUENCE TUNER Marion J. Pifer, Williamsville, Carl F. Carlzen, Buffalo, and Harold J. McGarvey, Eggertsville, N. Y., assignors to Colonial Radio Corporation, Application July 4, 1945, Serial No. 603,130 11' Claims. (01. 74-10) 2 This invention relates to a tuning unit for radio receivers, and more particularly to what is known as a “sequence tuner”; that is, one in which the apparatus may be pre-set or adjusted to operate, in response to the pushing of a single accuracy of settings or cause button, to tune successively, in a predetermined order, each station of a previously-selected group 01 stations. Such tuners are particularly useful, in automo bile radios where the tuning may be‘ controlled 10 vention itself, however, both as to its fundamen tal principles and as to its particular embodi ments, will best'be understood by reference to the unit for installation in the receiver. view, improper tuning of pre-set stations. The features of novelty which we believe to be characteristic of our invention‘ are set forth with particularity in the appended claims. Our in speci?cation and accompanying drawings, in which by a single push button mounted on the steering Fig. 1 is a top plan view of the sequence tuner column or by a foot switch mounted on the ?oor. vin accordance with our invention, Each closure of the switch operates the tuning Fig, 2 is a vertical section on lines 2-2 of Fig. mechanism to change frohr'one station to the 1 with the tuner in normal position, next, in the order for which the apparatus has 15 Fig. 3 is a section on lines 3--3 of Fig. 2, been previously pre-set. When the last sta Fig. 4 is a front elevation of the tuner, tion of the group has been tuned in, the next Fig. 5 is a rear elevation with part of the hous operation of the switch causes the mechanism to ing broken away to show internal construction, tune in the ?rst station, and the station tuning .Fig. 6 is a detail view showing the solenoid, its cycle begins again. 20 core, and the bail which is operated thereby, Among the objects of our invention may be Fig. 7 is similar to Fig. 2, but showing the mentioned: mechanism in the position it takes when the tur To provide a tuning unit in which the mechan ret has just finished the forward half of its stroke ical parts, the electrical components, and the and tuned a new station, with the latching part dial indicator may be built complete as a single 25 ‘M distorted 90° about shaft i511 to bring it into - Fig. 8 is similar to Fig. 5, but showing the To provide such a mechanism capable of easy pre~setting or calibration to receive any one of a number of selected stations. To provide such aunit including a manual tun mechanism in the same position as the parts in Fig. 7, 30 Fig. 9 is a plan view of turret l3 similar to Fig. 3, showing the notched rocker bar it, ing knob, the operation of which. is not interfered ’ Fig. 10 is a section on lines iil—i@ of Fig. 9, with by the sequence tuning mechanism and Figs. 11, 12, and 13 are horizontal sections on which requires no preliminary operation, such line H-l l of Fig. 8, as pushing in the knob, indexing to especial setting, pushing a special button, or the like, in 35. Fig. 141s a horizontal section through the rock er bar bearings showing clutching mechanism order to tune manually. , , . taken on line ill—i 4 of Fig. 7, and To provide such a unit having a dial pointer Fig. 15 ‘is a section on lines l5-l5 of Fig. 14, formed as a part of the tuning unit.v To provide such a tuning unit which may be showing shape of bearings. the mechanical parts. of the tuning instrumentality is preferably lin easily pro-set or adjusted to select desired sta 40 The following brief summary of the construc tion and operatlonof our tuner, it is believed, tions without the use of tools of any kind, and will facilitate an understanding of the more de which can be set up by anyone. tailed description appearing later. To provide a unit which is relatively small, compact, light in weight, and of high mechanical 45 In accordance with our invention, signal selec tion is accomplished preferably by what is known efilciency. To provide such a unit with interlock as permeability tuning; that is, the movement of ing safety features preventing the possibility of iron cores In (Fig. 2) into and out of coils ll of damage to the parts through incorrect operation. the tuning circuits; but it will be understood that To provide such a unit which will unfailingly other tuning instrumentalities may be employed, tune closely to desired stations, without requir 50 such, for instance, as the movement of copper ing excessive and unusually small tolerances in slugs into and out of the coils. The movement ’ r - To provide a unit of such design and construc ear, and‘such linear movement is derived from tion that it is substantially free from backlash, rotary movement of tilt or rocker bar ii. and in which normal wear does not destroy the 55 The angular position to which tilt or rocker 2,411,754. 4 bar I2 is set determines the position of the variable tuning instrumentality and, therefore, the frequency of the tuned circuits and the sta tion to be received. The tilt or rocker bar is . and may project through an opening in o?set ' lip 200. on the front of the housing. At its rear end it may rest in bushing i5c carried by the rear face of housing 20. Adjacent to its front end, inside the housing, this shaft may carry operated by selector turret l3 (Figs. 2, 3) mounted tubular gear i1 pinned thereto. for both axial and rotary movement, and carry Shaft i5a' is biased to the forward extremity ing a number of adjustable selector screws Ma, of its movement by means such as spring iibe Mb, 14c, Md, and He arranged with their axes surrounding shaft I51: and con?ned between off parallel to the axisbf rotation of the turret. When the turret moves axially, driven, for ex 10 set face 20a of the housing and pin led extend ing through the shaft. The forward extremity of ample, by a solenoid energized by closure of the its motion is reached when the forward end of sequence tuning switch, one of these selector tubular gear i'i ‘abuts against the inside face of screws engages one rod i2a oi’ the tilt bar,- and offset shoulder 20a. ' the other rod 92b of the tilt bar is engaged by Gear ll is at all times in‘ mesh with gear 2i. hub 08a of turret it, adjusting the tilt bar, and 15 Gear 2!, having sleeve 2M. secured thereto, is by it, the tuner, to the position corresponding to mounted for rotation on carrier rod 22, which the pre-set station. Rotation oi’ turret it to extends through housing 2t, and is secured in bring di?erent selector screws ida, Mb, iélc, Md, position by nuts 22a and >221: engaging the and Me into position to engage the tilt bar pro vides for selection of di?erent stations. ‘ 20 threaded ends thereof. Spring washer 23 may be interposed between gear 2i and the forward Turret it is normally out of engagement with face of the housing, and the position of gear 29 tilt bar it, during which time the manual tuning lengthwise of shaft 22 may be determined by knob i5 is clutched to the tilt bar. When the collar Ztmounted on carrier rod 22 and secured turret moves forward to change the station tun ' ing, the manual knob is de-clutched from the 25 thereto as by pin 26. G'ollar or tube Zlb of resilient friction material tilt bar, which is thereby left free to rotate to such as rubber may surround sleeve Zia. This the position determined by turret i3; and when collar 2ib, secured on sleeve Zia, serves to drive the turret reaches the end of its forward stroke, ' tilt bar it upon manual tuning through sector tilt bar it has been moved to the position corre sponding to the new station, and that station is 30 shaped plate 25 having a knurled face and car ried by bracket 2e secured to end plate 2i of the tuned. > tilt bar assembly. Immediately afterward, turret l2 executes its Tilt bar it is preferably formed by two end return or indexing stroke and near the end there-. plates El and 28, joined by the two contact rods . of is given one step of- rotation’, preparing it to tune the next station in sequence. At the ‘same 35 i212 and i227. These rods are not symmetrically placed with respect to the center of rotation of ' time the manual knob is re-clutched to tilt bar tilt bcI~ l2, rod l2a being somewhat larger in it so that'manual tuning may be accomplished diameter and placed further from the center of without any preliminary operations, such as rotation‘ of tilt bar i2 than rod Mb. The entire pushing in, the knob, pushing a‘ manual button. 40 tilt bar assembly is mounted for rotation on bear or the like. ~ 1 ings 29 and vtil (Fig. 3). Bearing 29 may be Calibrating or pro-setting the apparatus for adjustably screw threaded into housing 269 and desired stations is accomplished by means of secured in adjusted position by nut 2am. . V type gears ltd, 8th, the, ltd, and the, one of which, bearings are preferably used in the end plates in the forward position of the turret, meshes 2i and 23 with springs 2M and 28a to hold the with gear it mounted on manual tuning shaft bearing studs in the V's. This eliminates any the. These gears are normally disengaged, but possible play in bearings. may be engaged in the forward position of the . turret by pushing in the manual tuning knob against its spring bias. Turning the manual tun= the knob under such conditions tunes in the de» sired station and pre-sets the selector, by adjust ‘ ing the selector screw to the proper position to tune the station. Mechanical interlock id is provided to prevent depression of the manual tuning knob except when the turret is in forward position where it can be adjustedto set up stations. This inter The lower end of end plate 28 of tilt bar 02 ' may extend below manual tuning shaft leg and be connected by link ti to slider 212v carrying permeability cores it. From this it will be seen that as tilt bar i2 rocks in its hearing, it carries with it slider 82, moving cores it into and out of their respective coils to vary the receiver tuning. The upper end of end plate 26 may project beyond housing 26 through opening 88 and car ries pin 86 carrying ball to engaged by double link 86. The opposite end of link 23o may engage second ball 37! carried by pin 38 secured to bell crank tuning switch, if that switch is mounted on the receiver chassis, and it may be arranged to hold 60 leegver 3b pivoted on the top of the housing, as at the manual knob out of pre-setting position so The other end ill of bell crank lever 89 may be long as the sequence switch is not energized. and pivoted to an intermediate point of fork £32, the also to hold‘ switch engaged while knob is ole ‘ fork portion of which is arranged to slide in a pressed for station set-up. ' Turning now to the more detailed description 65 groove on stud £353 mounted at the rear side of housing 263. , $ecured to the forward end of fork I of the construction and operation of our tuner, 62 there may be provided pointer 636,; which co the mechanism is housed within a suitable cas operates with a dial indicated in dotted lines. ‘ ing 2d, preferably of metal, generally rectangular A clutching engagement between sleeve 2M and in shape, and of approximately the dimensions indicated on the drawings, which are actual size. 70 ‘sector it is normally provided by means of a piv~= oted pressure bracket [3b (Fig. ii, Fig. 12) pivotally Extending through the housing we provide mounted on stud lit for a slight rotary movement manual tuning shaft the, the outer extremity of in the plane of the paper except when the sole which carries manual tuning knob it. ' lock it may be mechanically tied to the sequence This shaft is preferably mounted so as to be - rotatable and also slidable anially. and at its front noid is operating the tuning. Pressure plate 48 is maintained in the position shown in Fig. 3 by 2,411,715 4 means of pin 46, which normally presses on the outer extremity of pressure plate 45, holding sec tor 25 against rubber tubing 2 la. For the purpose Of‘DI‘OVidiIig the small amount of motion necessary to permit clutching and de clutching of sector 25 to collar Zia, the sector may be secured to tilt bar end plate 21 by means lector screw Ha, Mb, I40, lld, He, each pin riding in its respective slot. To limit the backward adjustment of each screw. we may provide a circumferential groove 92 at the rear end of the turret in which we may place spring retaining ring 93. To remove any’ screw, ring 83 is removed, after which rotation of of the small spring plate 49. When the solenoid ’ the adjusting nut works the screw out of the holes operates, pin 46 is moved forward, coming oppo in flanges 50 and 5|. site depressed portion 50 of pressure arm 45. 10 It will be observed by reference to Fig. '7 that Pressure is no longer applied to sector 25, and the contact rod lid of the tilt bar engages the bot-v latter, moving slightly counter-clockwise, springs tom selector screw, whereas upper bar l2b does out of contact with sleeve Zia, permitting the not engage any selector screw, but always engages tuning of the receiver without driving gear 2| and the front or hub l3a of the turret. To prevent manual tuning shaft I5a. 15 contact between the two top selecting screws and At the same time, the constant clutching en the top of rod 621), which might otherwise occur gagement between sector 25 and sleeve tic, ex if the selecting screws projected out too far, rod cept when the solenoid is being operated, permits t?b may have notches formed in it to prevent manual tuning at any time without the necessity contact and jamming, as shown in Figs. 9 and 10. of performing a special operation on the tuning Mechanical power for the sequence tuning op shaft. or pressing a manual button as has hereto eration may be supplied by solenoid 54, having fore been necessary in all such apparatus with slidable core 56a. When the solenoid is energized, which we are familiar, nor does manual tuning core 5%, normally in the full line position of interfere with the sequence tuning operation, be Fig. 6, is drawn intothe dotted line position. cause, no matter what the initial position of the apparatus may be, operation of the turret to se lect a particular pre-set station will always set the apparatus to tune to that station. The core may have a slot out near its end as at be control‘ed by its particular adjusting gear nut 59a extending inwardly from the top of the hells ing and engaging corresponding key slots 68a, 66b, Bile, 66d, and tile in the rim of‘ ?anges 5i} 541) for engaging cross member 55 of ball 58, piv oted as at 56c and 581) on housing 2!], spring biased to full line position as by means of springs The structure by which this is accomplished 51 and 58. will now be described. Mounted on carrier rod 30 As will be observed from Figs. 2 and 5, the turret 22 for both endwise sliding movement and rota may have a groove 59 formed near its rear end tion, we provide turret l3. This turret has cen and cross member 55 of bail 56, which is slightly tral hub iiia and surrounding it with their axes offset at one end, passes through this groove. parallel to carrier rod 22 we have provided a When the solenoid is energized and its core moves . number of selector screws l4a, 14b, i4c, “ti/and to the dotted position shown in Fig, 6, bail 5% l4e, spaced equiangularly around turret iii. In is carried to the dotted position shown in Fig. 6, the embodiment shown there are five of these se and the engagement of cross member 55, lying lector screws whereby the tuner may be pre-set in groove 59 in the turret, carries the turret to or calibrated for five different stations. the forward position shown in Fig. ‘7, whereby It will be understood, however, that if desired, 40 the tilt bar is swung to the position determined a larger or smaller number of selector screws by the adjustment of the adjusting screw in may be provided‘. to accommodate a larger or contact with contact rod iZa of the tilt bar. smaller number of stations. In order to prevent possible mistuning or jam Each of the screws passes through a suitable ming of the apparatus, which would result if the opening in ?anges 50 and 5| of turret l3, and turret moved forward while out of position with the longitudinal adjustment of each screw may respect to its rotation, we prefer to provide key 16a, I62), I60, ltd, and We, internally threaded to engage the threads of its respective screw, and ' positioned at an intermediate point on its re 50 and 5i. It was previously stated‘ that on the return spective screw, held against accidental disturb= half of the turret stroke the turret is given one ance by means of anti-friction washers 53a, 53b, 53c, 53d. and 836. step of rotation to index it to the nextstation. The outer surfaces of gears‘ 52a, 52b, 52c, 52d, In this particular embodiment, with provision and 52a have teeth of the pitch to engage with Mi for ?ve stations, the amount of rotation intro duced on each stroke will be 72°, but in any case tubular gear ll when the turret is in the for it will. be equal to 360° divided by the number of ward extremity of its position and manual shaft 15a is pushed inwardly. When this occurs, rota~ ‘ stations which the apparatus can handle. The structure by which this rotation is accom tion of shaft i511 rotates adjusting nut ita, i622, iBc, iSd, or Hie, as the case may be, and thereby W plished will now be described. Referring partic moves the particular screw forward or backward in the turret. ularly to Figs. 5 and 8, it will be observed that there are five pins, tic, Gib, tile, did, and tie, projecting rearwardly from the rear face of the To facilitate assembly and adjustment or", the screws Mia, Mb, M0, M42. and its, each of the as turret, these being spaced at the same radial dis tance from the center and spaced apart by equi holes in ?anges 5d and 5t are preferably reamed angular distances, in this case 72°. out, and the screws themselves are preferably Positioning pawl 62 is mounted for oscillation ground to provide an accurate, smooth fit and on bushing the on the rear face of the housing. prevent undue backlash or play of the screws in This is provided with pressure face 64 turned the turret. To prevent rotation of the screws 70 over in position to be engaged by actuating screw when the adjusting nut is turned, we prefer to 85 carried by ball 56. The pawl 62 terminates provide a series of longitudinal slots We, 96b, 90c, at its outer extremity in a wedge-shaped nose 90d, and Bile (Figs. 2, 8) extending from the rear portion 61 adapted to ?t between any two adja of the turret to ?ange 50, and a corresponding cent pins such as 6 lo and 6 Id. This pawl is spring key pin 98a, 9lb, Slc, Sid. and Me. in each se 75 biased counter-clockwise by means of spring 68, 2,411,704 7 having one end secured to the. housing and the provement, or combination which we claim as other end secured to some part of the free end. It will be observed that there is a slight clear our invention or discovery. P . ' While we have shown and described certain ‘ preferred embodiments 01' our invention, it will . ance provided between adjusting screw 65 and be understood that. modi?cations and changes may be made without departing from the spirit pressure plate 64. This is provided so that as ball 58 swings, the turretwill ?rst be moved forwardly to clear pins 6 lo and 8ld from pawl 62 before the and scope thereof, as will be clear to those‘skilled latter is swung clockwise by the engagement of ' screw 65 with pressure plate 64. As the bail con , in the art.‘ ’ _ We claim: 1 “ ' r tinues to swing under the pull of the solenoid, 10. - 1. In a sequence tuner, in combination, a po sitionable element, a tilt bar connected thereto pawl 62 rotates clockwise to ‘the position shown for actuation thereof, a turret, mounted for. ro in Fig. 8 and is latched in this position by spring tation and axial translation, engaging said tilt latch 89, the head of which may project inwardly bar on opposite sides of the tilt bar axis of rota through opening 10 in the housing. Latch '69 is normally held in the position shown 15 tion and setting‘ it to one of a predetermined series of angular positions, and means for im in Fig. 11 by engagement of one of the pins Gla, parting a work. and indexing stroke to'said tur Gib, 6lc, Sid, and Me against its latch‘ end, but ’ ret, said .work stroke being an axial translatory as the turret moves forward the-latch end moves movement, and said indexing stroke being a pre in; and when lever 62 clears it, the latch takes the position shown in Fig.- 11, holding lever 82 20 determined increment of rotation. ‘ 2.--The combination claimed in claim 1, in in the position shown in Fig. 8 until the turret which said turret carries 'a number 01' adjustable again returns. When this occurs, the latch spring elements for engaging one side of said tilt bar, is pushed backwardly as in Fig. 12, and it will and a non-adjustable portion engaging the other be noted that when the latch ?nally releases lever 82, its nose 69a is now in position to engage 25 the next pin of sequence Bla, Gib. Bic, Sid, and side of said tilt bar. - Y ' 3. The combination claimed in claim 1, in which said turret carries a number of adjustable elements adjacent its periphery for engaging one When the latch ?nally releases lever 62, the side of said tilt bar, and a non-adjustable Portion pressure of spring 68 restores lever 62 tolthe posi to the center of rotation of said turret for tion shown in Fig. 5, rotating the turret through 80 closer engaging the other side of said tilt bar‘. 72°. Thus, if the apparatus started in the po 4. The combination claimed in claim ,1, in sition shown in Fig. 5 with pin Bid at the bot which the tilt has two engageable portions‘ at tom, in the last portion of the return stroke lever diiierent distances from the center of rotation 82 will rotate turret one step counter-clockwise, of the tilt bar, and in which said turret carries’ as seen in this ?gure,and Blb will now be at the 35 a number of adjustable elements vifor engaging ’ bottom. Each successive operation of the sole one side of said tilt bar, and a non-adjustable noid will thus cause tuning to the station next portion for engaging the other side oi’ said tilt bar. on the tuning cycle and on the return stroke of 5. The combination claimed in claim 1, in which the turret it is rotated by the amount necessary 40 saidturret carries a number of adjustable ele- ' to index for the following station. mentsfor engaging said tilt bar, said elements . All that now remains ‘to be described is‘ the being longitudinally adjustable, but ?xed against Ble. ~ I action of the interlock, which prevents pushing the manual tuning shaft into calibrating posi 6. The combination claimed in claim 1, in‘which tion except when the solenoid is energized. For 45 said turret carries a number of adjustable ele this purpose the sequence switch indicated diaa . ments for engaging said tilt bar, said elements grammatically as 10 may have operating plunger being longitudinally adjustable, but ?xed against rotation. ‘ll provided with knob or button 12. Plunger,“ may extend through the switch and project from . the rear thereof, where it may be pivoted to bell crank lever 13 pivotally secured to any suitable mounting bracket. ,. ' > The free end 14 oi.’ bell crank lever 13 may normally abut against manual tuning shaft-alto, _ g a . . . rotation, and each provided with an adjusting nut intermediate its ends arranged for rotation ‘ ~to eifect longitudinal adjustment of its element. _ 7. The combination claimed in claim 1, in which . said turretcarries a number of adjustable ele ments for engaging said tilt bar. said elements being longitudinally adjustable, but ?xed against . and the latter may be provided with collar ‘I5 se rotation, and each provided with-an adjusting cured thereto, which ordinarily engages end '14 '55 nut intermediate its ends arranged 'for rotation of bell crank lever 13, and prevents inward dis to effect longitudinal adjustment of its element, _ placement-oi the manual tuning knob. said adjusting nuts being provided with external When, however, the operator depresses knob gear teeth, a manual tuning shaft carrying a driv 12 to closeswitch 10, ball crank lever 13 is ro 60 ing gear, one of said adjusting nuts meshing with tated clockwise by an amount sumcient to clear . said driving gear when the turret is at the end collar 15, and manual tuning shaft Ilia may now of its work stroke. ' be pushed inwardly to engage tubular gear ll ' 8. The combination claimed in claim 1, in which with any one of the adjusting nuts. Upon re lease of the manual tuning knob and of the se quence switch knob, bell crank lever 13 and tun ing shaft l5a return to the position shown in Fig. 1, locking the tuning shaft against inward ‘ said turret carries a number of adjustable ele 65 ments for engaging said tilt bar, said elements being longitudinally adjustable, but ?xed against rotation, and each provided with an adjusting nut intermediate its ends arranged for rotation , y In the speci?cation we have explained the 70 to e?ect longitudinal adjustment of its element, said adjusting nuts being provided with external principles of our invention and the best mode gear teeth, a manual tuning shaft carrying a drivi in which we have contemplated applying those ing gear, one of said adjusting nuts meshing with ‘principles, so as to distinguish our invention said driving gear when the turret is at the end from other inventions; and we have particularly pointed out and distinctly claimed the part, im 75 or its work stroke, and said manual tuning shaft displacement. 2,411,754 being axially movable to mesh said driving gear‘ and one of said adjusting nuts. 9. The combination claimed in claim 1 with a a manual shaft normally clutched to said tilt bar, and means for declutching said shaft when said turret is performing a work stroke. 10. The combination claimed in claim 1 with a manual shaft normally clutched to said tilt bar, 10 11. The combination claimed in claim 1 in which the means for imparting an indexing stroke to said turret includes a spring-biased pawl en gaging the turret, means for shifting said pawl after predetermined axial movement of said tur ret, means for latching said pawl in shifted po- > sition, and means for releasing said pawl as the turret returns to starting position to permit said a switch for-controlling the work stroke of said pawl to rotate said turret to a new position. turret, and an interlock preventing axial move 10 MARION J. PEER. ment of said shaft except when said switch is ‘in CARL F. CARLZEN. position to impart a work stroke to said turret. HAROLD J. McGARVEY.