US1183193A - Plural selective signaling device. - Google Patents

Description

W. E. HAR iNESS.

PLURAL SELECTIVE SIGNALING DEVICE.

APPLlCATION FILED S EPT. I2, [912.

Patented May 16, 1916.

a SHEETS-*SHEET 1.

Fig-

' WITNESSES "(YEA/TOR W. E. HARKNESS.

PLURAL SELECTIVE SIGNALING DEVICE.

'APPUCATION 11151) SEPT. 12. 1912.

3 SHEETS SHEET 2.

F ign 6 A9 ATTORNE w. E. HARKNESSV.

PL'URAL SELECTIVE SIGNALING DEVICE. I

, {APPLICATION- FILED SEPT .-l2, 1 912. 1,1 83,193; r Patented May16,1910

' 3 SH. ETS-SHEET 3.

, WIT/4.58858 V I INVENTOB 2/76. I V

UNITED STATES PATENT GFFIC.

WILLIAM E. HABKNESS, OF EAST ORANGE, NEW JERSEY, ASSIGNOB, BY ASSIGNMENTS, T O HALL SWITCH & SIGNAL COMPANY, A CORPORATION OF MAINE.

PLURAL SELECTIVE SIGNALING DEVICE.

Specification of Letters Patent.

Application filed September 12 1912. Serial No. 719,340.

To all it may concern:

,Be it known that I, WILLIAM E. HARK- mess, residing at East Orange, in, the county of Essex and State of New Jersey, have lilrlines, whereby gignals at various points.

along the. line may be selectively operated without interference of electrical impulses Serial No; 686,798,.fi1ed March as, 1912.

impressed upon the line.

he several selectors on theline arepreferably controlledi by an automatic sender comprisinga movable contact adapted 'to send-"impulses at rapid intervals, said no- I pnlsesbeing of relatively short and relay tlvely long duration, as is common in the art. 3 By. a properly selected series of rela' tively long and short impulses the selector I at any given station may be called without making contact through any'other selector on the line.

The present invention, Willie applicable to various forms of selective signaling devices,

as embodied herein, involves, certain im- 'provements over structures of "the general .ents and "applications of one Edwin R. Gill and particularly his pending application The principal object soughtwt'o be. attained is to improve such structurerwhereby,in its unitary formation, it,may be made adaptable for closing any selected. one of a plurality of signal. circuits in response to a selected series of short and long impulses.

Another object is to improve the construc tion, manner and. arrangement of the contact making parts whereby they are made more positive and whereby a-number of separate contacts maybe mounted and independently controlled from a single control member. a

' Other objects and aims of the invention,-

tions, arrangements ofaalrtsynnd applications of principles constituting the invention, and the scope of protection contemplated therefor will beindicated in'the appended claims. n

- In the accompanying drawings, which are to be taken as a part of this specification, and in which I have illustrated a merely preferred form of embodiment of the invention, Figure 1 is side elevational view of a selector constructed in'accordance with this invention, the protecting hood thereof being removed; Fig. 2 is a View similar to Fig. 1, but being taken from the opposite side of the device;l3ig. 34s a top plan view of the parts shown in Fig. 1; Fig. 4: is a front elevations-l view, the base portion be ing shown in transverse section; Fig. 5 is a transverse, vertical, sectional view taken substantially cntheplane of line 5+5 of Fig. 3 looking 'in the direction of the arrow; Fig. 6 is a longitudinal, vertical, sectional view taken on the plane of line 66 of Fig. 4 looking in the direction of the arrow; Fig, '7 is a side, elevational view, parts being omitted and parts being shown in vertical section substantially on the plane of line 7 or Fig. 4, lookingin the direction of the arrow, the protecting hood being illustrated in position in section; Fig. 8 is a detail, fragmentary, elevational view of the controlling ratchet wheel, which is adapted to he stepped up by electrical impulses; Fig. 9 is a fragmentary, perspective view of the contfi i t'filaking mechanism, and illustrating the application of aslight modification thereto; and'Fig. 10 iseldetail perspective view ofitlie lever pawl forengaging thewheelshown in Fig. 8. A

Referring to. the" drawings by nnmerals,'l indicates a base, of. porcelain or the like, upon which is supported the protecting hood 2, preferably of glass. l Vithin the hood 2, and supported upon the baselgis the frame work 'ofthe selector, generally designated 3; This framework comprises spaced side members 4 and 5 and between. these isjouc naleda horizontal shaft 6 carrying a ratchet control wheel 7. The shaft 6 is im elled in the direction of the arrow (Fig. 6 by the hair spring 8. An electro-magnet 9 acts, through the armature 10, bowed spring 1.1, and connecting rod 12, to operate an impelling lever 13. An impelling pawl 14 is piv" "oted to the free endof the lever 13 and is provided with a short arm 15 against which Patented May 16, 19 16.

bears leaf spring 16 for directing the lower end of the pawl. into the successive teeth of the Wheel 7. p A stop 17 is provided to limit the downwardmovement of'the pawl 14. Energization of the magnet 9 straightens the spring 11 and causes the lever 13 to swingdownward on its pivot at 18, and the impelling pawl it engages thewheel 7 and moves the same one tooth forward. VVhen' .the magnet is denergized the spring 11,

through the rod 12, and lever 13, lifts the pawl 14 back to its normal position. A retaining pawl 20, projecting laterally from a lever arm 21, engages the teeth of the wheel 7 to prevent return of said wheel to normal under.the influence of spring 8.

v The arm 21 is fixed rigidly to an inclined instance, as heretofore,

, teeth are beveled oil" shaft 22 rockably mounted in hearings in the opposite side pieces fr: and 5 ofthe frame,

said'shaft being movable endwise upon elongated journals to facilitatebodily movement of the lever 21 sidewise to disengage the pawl20 from the teeth of the wheel 7. The inclination of the shaft 22 causes the same t'o drop by gravity toward its lower end and thereby causes the return of the pawl 20 into engagement with the teeth of the Wheel as Will be hereinafter explained.

The action of the control wheel and its driving parts maybe described substantially asfo'llows: When the wheel is at normal, and before a call is begun, any rapid impulses impressed upon the line will produce only a back and forth 'motion of said wheel throughthe space of a single tooth, but when a call is begun, a long impulse is given to prepare the wheel for action. Thereafter a selected series of codal impulses will cause the wheel to move forward step by stop until types of teeth are indicated at 23 and 24- in F 1g. 8, 23 designating a lower contact? tooth and24: indicating the upper. contact teeth. There is also provided upon the wheel 7 a tooth 25,. which is beveled, both 1 top and bottom, so that no portion thereof Will present a holding surface to the pawl 20. There is also provided a tooth 26 having its upper portion cut entirely away.

Fig. 6 shows the normal position of the parts, and in. this position the lever 21 is supported in an elevated position so that the pawl 20' is raised out of engagement with the teeth of-the wheel.

only the base portions present a contact teeth.

A} catch 27, on the lever 21, stands above a hook 138 fixed upon arock shaft 29. This hook, byengaging the catch 27, maintains the pawl 20 elevated so that, whileit will form a holding-engagement with upper contact teeth 24, it however cal'i'not hold the lower contact tooth 23, nor can it hold the tooth 26 which, it will be noted, isthe first with which it has to contend. Thus, since 'the pawl l-l.

- operates to rotateth'e wheel only the space of a single tooth at each impulse, and since the pawl 20 cannot engage the tooth 26, it follows-that, so long as the pawl 20 is held elevated by the hook 28 impulses on the line will produce only a back and forth motion of the wheel through the space of a singletooth. Now, in order to cause the wheel to progress through its whole phase,

means are provided whereby an impulse of sullicient duration. with the pawl 14 depressed, will cause the pawl 20 to be dropped in position to engage the base of the tooth 26, and also the bases of any ,lower contact teeth. For this PHI'POSO the following means are enn'iloyedz Upon a rock shaft 30,,at the rear of the find), is fixed a forwardly extending lever 31, to the free end of which is pivot'edfa frame 32 carrying an inertia time wheel'33, the hub 34 of which rests upon an inclined track 35 and is adapted to slide orfoll-thereon. The inclination of the track 35 is adjustablethrough the medium of slot 36 within which the forward end of the track is secured byclamp 37. The

,whecl 33 held near the upper end of the track by an arm 38, fixed to the impelling lever 13 so that eachtime said lever is depressed the wheel 33 will begin to roll slowly down the track 35 only to be returned quickly when the lever l lrises. If the impellinglever is de n'essed long enough, the wheel 33 will roll down the track 35 sufliciently far to permit the frame 32 to on gage the end of a lever 39 fixed to the rock shaft 29 towhich the hook 29' is secured. This action throwsthe hook 28 rearwardly away from the catch 27 so as to release the pawl 20 and is accomplished only in the event of a long impulse, This being given, the tooth 26 is engaged and the wheel held against return. 1 1

It will be noticed that, in the arrangement orcon bination of forms of teeth present in the control wheel shown, the cut-a way tooth 26 is followed ii'nn'iediately by two upper 14 descends again to step the wheel 7 forward, the first of these teeth will lift the 'catch 27 above the book 28; which meanwhile has returned. to normal position, whereupon the catch", dropping upon the hook will come into holding contactwith the first of the upper;contact teeth, holding the wheel against return. This impulse must be short, else thewheel33 will roll sulli- 'lhereforc, when the pawl ciently far to remove the hook and permit the pawl 20 to ride off the inclined portion of the tooth. One more short impulse, fol lowing the one just described without appreciableintermission, will cause the wheel to be advanced. Since, now, the next tooth,

as 23, to be engaged by the pawl 20 is a' lower contact tooth, then the succeeding impulse must be of relatively long duration so as to permit the pawl'20 to drop into holding enga ement with the flat surface of said tooth. hen the wheel is-again stepped forward, the next succeeding tooth, which is an upper contact tooth .will again lift the pawl so that the catch 27 will be above the hook 28. This impulse being short and being followed by two short impulses. and one long impulse, without appreciable intermission, brings the beveled teeth 25 into position opposite the pawl 20. The last of these impulses must be relatively long for the reason that the parts have now assumed po.

sition to close a contact for operating the electro-magnet signal as will be hereinafter explained. When the pawl 14 returns to normal, the beveled portion of the tooth 25 will push the lever 21 laterally, and the pawl 20 will be entirely disengaged from the teeth of the wheel and allow the latter to return to normal. It should be borne in mind that, with the pawl 20 in contact with the retaining" surface of any :one of the upper con-.

tact teeth as 24, if the time wheel 33 is allowed to complete its travel, then the hook 28 will be removed from beneath the catch 27 so that the pawl 20 will drop, and, upon R the return of the pawl 14 to normal, the

pawl 20 will ride oil the cut-away or inclined portion of such tooth and permit the wheel to return immediately to its original position, The same result will obtain it a short impulse be given while the pawl 20 is opposite a lower contact tooth.

An illustrative object of the device so far described, is to cause the closing of a normally open circuit, and this end is attained as follows: Carried upon the shaft 30 is a spring contact arm 40, which projects up wardly into cooperative relation with an ad justable, relatively stationary, contact 41 carried 'by an insulating block 19 fixed be tween the side pieces 4 and 5 of the frame. Since the shaft 30 is controlled in its.movcments by the movements of the wheel 33 along the inclined track 35, it follows that the end of the contact arm 40 will be permitted to engage the contact 41 only when thewheelfi moves downwardly throughout substantially its entire travel, Short impulses, permitting little or no movement of I the wheel, will therefore not appreciably move the arm 40, while the relatively long impulses will. Fixed to the pivot end of the arm 40, and extendin forwardly, is a rela-' tively rigid arm 42, t e front end of which to engage the annular surface ofthe disk for positively preventing premature engagement of the contacts 40 and 41, such as would occur during any long-impulse either for operating this particular selector or for operating some other selector on the line, at all times except when the recess 44 is beneath the end 45 of the arm. The recess 44 is so positioned as to assume a position beneath the end 45 ofvthe arm coincident with the completion of a selected series of impulses. For instance, its position, in the structure illustrated, is such as to reach the end of the arm at the same time-that the tooth 25 of the control wheel. reaches its position opposite the pawl 20 so that during the time that the impulse, which moved the control wheel into this position, continues, the end 45 of the arm stands in the recess 44 and thus permits suflicient movement to bring the "free end of the arm 40 into engagement with the contact41. In order to permit of a slight move ment between the shaft 30 and the arms 40 and 42 said arms are loose upon the shaft and an arm 46 is fixed to the shaft having a turned end portion extending beneath the arm 42. A similar arm 47- is fixed to the shaft 30 having an end portion turned into by the free end pf thearm 42 for producing ontact between the members,

a more positive 40 and 41 when the end 45 is within the recess 44 of the disk.

Fixed upon the shaft 6 is an iarm 49 which, when the control Wheel 'is returned to normal by the spring 8, will sln ike the inclined forward face of the lever 21 and raise the catch 27 above the hook 28. "An

inclined pin 50 on the wheel 7 also engages the end of theleverand more positively moves the same laterally to a position with the pawlv'20 above the teeth of the wheel. in the structure illustrated, as in the specific application referred t0,-I also provide means whose function it is to return the control wheel to its normal position automatically in case said wheel has not been stepped forward sufficientlyto bring its inclined tooth 25 into action when the impulses cease, as

upon the happening of a break in the line,

or at the end of a predetermined time after,

impulses used for operating other selectors on the line ha e ceased. To this end I have lowest point,

so long; as the impelliug lever and for a given nterval of time thereafter.

Thus, when the nnp'ellmg pawl has been" provided upon the opposite side of the fra me, from that occupied by the timing wheel 33, a second timing wheel as 51 which controls means 'for (lisengagii'ig the pawl 20 from the teeth of the control wheel 7 as follows: An arm is fixed upon a short shaft 53 journaled at the side of the frame piece 5., and to its outer end is pivoted a frame 54. to the lower end of which the wheel 51 isrotatabl y mounted with its shaft or hub engaging, and n'i'ova'ble along an inclined track 56. all of which structure is similar to that alreadydescribed upon the oppositeside of the. machine. The inclination of the track 56, relative to the horizontal, is opposite to that of the track '35 and the wheel 51 is adapted to be slid'up- \vardly along said incline-by means of arm 57 secured to the forward end of the impelling lever 13. Upon each downward movement of said impelling lever the wheel 51 will be n'ioved. backward up its track. When the impclling lever rises, at the end of each impulse, the wheel 51 will. roll slowly down the track,- and if the lever is allowed to remain lifted for a sufficient length of time the wheel will roll to its Upon a suitable bracket 58 fixed to the side frame 5 is a pivotally mounted lever-59 which extends forwardly and is adaptedv to swing in a horizontal plane and has its free end bent inwardly toward the forward. end of thelevez-QI. Extendmg laterally of the lever 59 and movable therewith, with bell crank action, is a second lever ()0 which pro Jects though the trame piece 5 and has its free end bifurcated ilIldSlZl'ilddllIl a cross member 61 on the frame Sl as shownfin Fig. 21. lVhen the frame o l moves forward the lufurcated end of the lever (30 1S correspondingly moved and the bell crank "action imparted to. the lever 59 causes the free end of the latter lever to be moved toward the lever 21. If at this time the lever 21' is lowered, so that the pawlit is in engagement with any one of the teeth, then the lever 59 will force the lever 21 laterally and disengage the pawl 20 and thus allow the control wheel to rcassmue its normal position. The arm 49 and pin carried by the control wheel will raise the lever 21 .so that its forward end will be free of the end of the lever 59. Obviously, each depression of the impelling lever 13, operat-.

ing through the arm 57, will more the lever 59 away from the lever 21 so as not to interfere with the movements of said lever 21 is depressed allowed to rise, and there is no succcedin I downward movement lot a limited period of time'thcn the timing wheel 51 will roll I opposite the pawl drop off the hook 28 when the lever 21 is moved laterally away from the control wheel a cut-away portion 62 is provided, intermediate the end of the catch and its point of connection with the lever 21.

So far as. has been already descrioed, the construction and operation of the present selector is, substantially the same as that shown in the particular application above referred to. In order to provide that a single unitary selector may be capable of effecting selective operation of a plurality of signals or the like, I have provided' 'means which-will operate in response to impulse characteristic for placing into operation any one of a plurality of'signal devices without interfering wither operating any of the other signal devices. Here, itimay be pointed out that'the closing of the electric circuit through the contacts 40; and 41 above described, is simply an exemplary illustratlon of one means which may be chosen to be set in signaling position by the devices described. In carrying out this idea, the

' the lever :39 inward. and remove the ';:2t\Vl 2O control member 7 has its teeth so formed as to release the pawl 20 rality of points, determined. bythe position of said pawl in relation to said tooth, and for each point. of release the shaft 6 is provided with one disk 43, each. of said disks being provided with a recess 44 in its periphery. Ergiair of arms 40, 4L2 is provided, upon the shaft 30, for each. of the disks 43, and the recesses 4.4 are spaced circumfercntially apart so that preferably only oneof said a position beneaththe bent end 45 of its corresponding arm $2 at any one time; In the structure illustrated I have shown simply two of the disks 43, with corresponding arms 41-0 and 12 and contacts 41. One of these disks has its recess 44 positioned to at any one of a plu receive the end of the arm 42, when the disk and control wheel have been rotated. through the full'extent of their movements. That is, when the tooth 25 of the control. wheel is 20, as has already been described.

lar starting impulse), two'short impulses followed by a third long impulse (with the pawlQO engaging the tooth 23). three'quick impulses followed immediately by a long This position was -.reache 1-. in' consequence of one long impulse (the regurecesses will assume impulseof a duration correspondingto the hasbeen shown that this hook is automatically removed by the continued downward travel of the wheel 33 with each long impulse, and also that the downward travel of said wheel rocks the shaft and lowers all of the arms e2 on to theperipheries of the disks d3. If a recess 4% ispositioned to stand beneath one of the ends of said arms, coincident with the iving of a long impulse, while one of the hipper contact teeth, intermediate the teeth 23 and 25, is

i signal.

opposite the pawl 20, then said arm will be permitted to lower and bring itscorresponding arm 4:0 into position for operating the Followingthis, immediately the long impulse terminates, the pawl 20,-being then opposite the lower portion of the upper contact tooth, will cam laterally and permit the wheel to reassume its normal po sition. This action would take place in consequence of a long impulse at any time when an upper contact tooth is opposite the pawl 29, provided a disk having a recess 44,

- is arranged to receive the end of a lever proved. selector,:whereby a selected one of a.

42 at the time said long impulse given either before or after the tooth 23 passes.

In the structure shown the recess 24 on the second disk 43*is positioned so as to receive the end 45 of the associated arm 42 at the time of the first impulse after the tooth 23 is passed, thus providing the necessity for a properly placed long impulse (at tooth. 23) in order to operate either of the circuit closers of this particular instrument. The slight modification referred to in Fig. 9 appertains to the arrangement of the arms -16 and dl i or lifting and depressing arms 42. This figure indicates the use of a single arm 63 fixed to the shaft 30 between two arms and having a cross head 64 bifurcated at itsopposite ends to straddle the arms 42. ,The operation of this implurality of signals, is-operated at a selected station is as, follows: Suppos1ng, a group of stations to be provided upon a single line a with one unitary selector at each station,

then the teeth upon the control wheels 7 of the several selectors are cut in such manner that each of said wheels will be stepped forward by a series of codal impulses d fferent from any of the others of said wheels. All of the instruments will be arranged in a well known manner so that their magnets are all energizedsimultaneously by impulses impressed upon the line by automatic send- (i5.

ers, or otherwise. Supposing, now, that the station, in which the selector disclosed here in is placed, is to be exclusively called by one or the other'of its signals: (it may be here noted that the several. signals adapted to be set; in operation by the single unitary selector shown, may comprise, for instance, bells in different parts or departments of an institution, or they may comprise means for designating the particular individuals in tended to be'interested, or they may be applicable for use in various other ways, and for a variety of purposes which will be apparent to those skilled in'the art), the instruments all being in normal position, the operator will first hold the circuit, through all the magnets 9, closed for a sufficient length of time to permit the several timing elements 33 to remove the several books 28 from retaining position beneath the catches 27 so that pawls 20 of all of the selectors will .drop upon the teeth 26 of the wheels '2'.

Three impulses will now be produced, the first two of short duration, but the third sufficiently long to allow the pawl 20 to fall behind the engaging face at the lower por tion of the lower contact tooth 23. For operating one of the signals at this station a single long impulse will now be given. For operating the other of the signals at this station, four impulses will be given; the first three being short and the last long. In the lformer instance, the single long impulse will move the first upper contact tooth 24, after tooth 23, into position opposite the pawl 20, the hook 28 will be removed', and the pawl 20 will fall to the bottom of said tooth and will cam off thereof, immediately the impulse ceases. In the latter instance, the short impulses, following the long impulse at tooth 23, will retain the pawl 20 in its upper position until the long impulse is given at tooth 25, when the pawl will drop and permit return of the wheel to normal upon cessation of the impulse. In each instance, one of the disks 43 will be in position so that its recess 44 is beneath one of the arms'42. It will be apparent that the control wheels 7 of the other instrument on the line will have either returned to normal, or at least will not have one of its disks 43 arranged to permit contact of the circuit closures therein, and that consequently only the instrument in the present station will be operated and the particular signal desired in that instrument only will be operated. The tooth 25, beveled throughout its entire engaging surface, is invariably placed at the end of the series of prepared teeth, and its office is to positively prevent a retaining engagement of the pawl 20 while the impelling pawl 14 is being raised to engage a succeeding tooth. Its cam face removes the pawl entirely from engaging relation with the teeth whether said pawl be in its raised or its lower pos1- 'tion. It will be understood, of course, that the contacts ll are electrically Connected, by wires 65-06, with binding ppsts. (ST and 68' preferably outside of the hood 2,fi\vliilc the opposite pole of the circuit may be grounded in the frame of the device.

From the foregoing it will be apparent that I have improved my'devicc so as tobe able to operate-a. plurality of signals, from 10 a single, selector, in response", .toimpulse characteristic, bemg susceptible, to operation for any number of times without affect ing the operationof' any ofthe others of said signals, and that a great variety of combinationsmay be made for operating a reasonably great number of signals from the single unitary selector, and that the number of combinations of upper and lower contact teeth possible on the control wheels of the several machines, is not lessened by the presence of the plurality of divisions within a given selector.

As inany changes couldbe made in the above construction and many a ')parently' widely-different embodiments of this invention could be made without departing from the scope thereof, it intended that all.

-*ters Patent, is:

shown, in the accompanying drawing shall be interpreted as lllllSlZl'flt1 \'C and not ina hunting sense. It is also to be understood that thelahguage used in the following claims is intended to cover all of the generic in described and all statements of the scope of the invention, which as a matter of language, might be said to fall therebet\veen.-

Having thus described my invention what I claim as new and desire to obtain by Let- 1. In a. device of the class described the combination of a single rotatable COllllLI'Ol member adapted to be rotatedv by a series of impulses and to beselectively rotated into aplurality of distinct operative positions and a plurality 'of circuit closers rotated Q With said control'member and adapted to fbe operated selectively one corresponding 1 to each operat-ive position of said control member. e

matter contained in the above descriptionmr 5 I and specific features of the invention here- 2. In a device of; the class, described, the

combination, ina unitary structure, of a plurality of circuit closers, a; control memher for placing 'all of said circuit closers in position for circuit closing movement and means operated by said control member for preventing all but one of said circuit closers from closing its circuit for each selective position of said control member. 3. In a device of the class described, the

combination of a control member adapted to.

be stepped by a series of impulses, means 'for stepping said member, a plurality of normally open circuit closers, each comprising a movable contact and a fixed contact and means tinder the control of-said control member whereby one, .onl y, of said'circuit closers ismade-operative when said control member has-been tion. 1' Y a 4. In a device of the class described, the combination of a control member adapted to be selectively stepped to a plurality of operative positions by series of impulses, means for steppingsaid-.1nember, a circuit stepped to a selected posicloser 'for each selective position of said member, a single time element for operating said control member for :-permitting onlyone of said contact closers to operate for 1eachselective position of said control memer. a i

G. In a device of the class described, the combination of a. control member adapted tobe selectively stepped to a pluralityof operative positions by series of impfulses,

means for stepping said "member, means opposlng the steppmg'ot' said control member, means, the operation or which 1s -;de-

termined by the length of impulse to render said last named means inoperative,"-means for restoring said opposing means to operatlve condition when the control member has been stepped througli a phase of movement, a plurality of circuit closers, according to the selected position of said control mem 'berand means operable by said control member for preventing all but one of said circuit closers from closinglitscircuit at. gach selective position of said control memel. 1 I 7. In a device of theiclass described, the combination, a unitarystructure, of a single control member operated by a series of impulses, means for operating said member, a plurality of circuit closcrsadaptedto be placed in position for circuit closing movement and means controlled by .said control memberfor preventingiall but one of said circuit closers from moving into circuit-closing position at each selectiveposition of 'sa'id control member. a

8. In a device of the class described, the combination, in a unitary structure, ofa single control member operated by a series of impulses, meansv for operating said member, a plurality'of circuit closersadapted to be placed in position for'circuit closing movement and means movable with sai control member for retaining said circuit closers against circuit closingmovement,said means being adapted to selectively permit movement of said circuit closers into circuit closinlg position, Y

9. n a device of the class described, the combination of acontrol wheel adapted to be rotated into any one of a pluralityof different positions in response to different series offcodal impulses, said-member? a plurality of circuit closers one for each of the positions into which said be thus rotated and means movable with said control wheel for control wheel may maintaining all of said circuit closers open but adapted to permit closing of one only of said circuit closers as said control wheel isselectively moved into said different positions.

r 10. In a device of the class described, the combination of a control wheel adapted to be rotated into any one of a plurality of different positions in response to series of imment adaptedto retain said circuit closers out of cooperative relation with said last named means as some of said positions are passed.

different positions in response means for rotating closers for each of said out member adapted to trol member but adapted to per- 11. In a device of combmation of a control wheel adaptedto be rotated mto any one of a plurality of series of codal impulses, means for rotating said member, 'a plurality one for each of the, positions int said control wheel mayybe thus which tated,

the class described, the f 40 to difierent I of circuit closers means movable with vsaid control wheel for maintaining all of said circuit closers-open but having cut away portions adapted to permit closing ofone only of said circuit os'ition of said wheel and a time element a apted to retain said circuit closers out of cooperative away portions except .a selected one as determined by the'particular'ser ries of codal impulses,

relation with all i 12. In adevice of the classdescribed, the

combination of a single rotatable control be rotated by a series into a plurality of distinct positions, means I a plurality of oir-' cuit closers, means rotatable with said con-f for controlling said circuit of impulses and to be selectively rotated for rotating said member,

closers whereby said circuit closers are adapted to be operated one corresponding. to

each of the positions of said control member one of said circuit closers.

. and means for returning said control memher to normal after the operation ofany In testimony whereof I ailix my signature in the presence of'two witnesses.-

WILLIAM E. HARKNESS. Witnesses: j

' 1 LEO Ersnn'nano',

NATHALEE THOMPSON.

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