Патент USA US2405769код для вставки
Aug„ 1.3, 1946. F, STONER 2,405,769 CONTROLLER Filed May 27, 1944 46 39 BY Patented Aug. 13, 1946 2,405,769 UNITED STATES PATENT OFFICE 2,405,7 69 CONTROLLER Frank Stoner, Lakewood, Ohio, assignor to The Baker-Raulang Company, Cleveland, Ollio, a corporation of Ohio Application May 27, 1944, Serial No. 537,653 3 Claims. (Cl. 172-179) 1 2 This invention relates to a controller and the circuit controlled thereby for a vehicle, more par the movement of the controller from neutral posi tion to first speed position and then to a higher ticularly circuit controlling means applicable to speed position thereof, respectively, the closing a vehicle, such as a tractor or one employed for of the holding circuit by movement of the con troller to the higher speed position being depend ent on a “dwell” thereof at the first speed posi handling loads where operating conditions make it necessary to (a) change the speed of the ve hicle during vehicle travel and (b) make quick reversal of truck travel. Vehicles of this type are commonly referred to as industrial tractors and/or trucks. The trucks are employed for loading and unloading operations, stacking and de-stacking operations and transfer of parts and products from one location to another location. In most instances, of which I have knowledge, for economical reasons, the operative for the tractor . or truck is encouraged to carry out these opera tions and effect truck travel from one location to another as rapidly as possible. In tractor or truck travel the aisles or lanes may be along a circuitous route, due to turns, positioning of ma chines and piled-up materials, so that it becomes customary to speed up the tractor or truck in straight-away sections of the route and quickly slow down at turns. In load pick-up and dis charge operations the truck is often driven for tion. Another object of the invention is to provide an improved controlling means for the circuit of an electric motor arranged to prevent reversal of current to the motor when the latter is running in either direction only by ñrst moving the con troller to neutral position for operating the motor in the opposite direction. Another object of the invention is to provide in an electric motor circuit having a contactor, an improved controlling means for the contactor consisting of a closing circuit and a holding cir cuit connected to the motor circuit at opposite sides of the contactor and a cam operated by the shaft of the controller and arranged t0 substan tially simultaneously close the closing circuit and open the holding circuit, and vice Versa, whereby the operation of the contactor is facilitated. Another object 0f the invention is to provide wardly and rearwardly with short quick impulses an improved controlling means for the circuit of of movement. Under these various operating a variable speed electric motor wherein (a) a conditions the operative attempts to slow up or minimum amount of metal forming the contact stop the traction motor of the tractor or truck portions or conductors of the controller is re by reversing the current thereto, instead of ap 30 quired to complete the circuit to the motor for plying the vehicle brake, so that damage to the each speed thereof and (b) the circuit for con motor and the electrical connections, as well as trolling the motor circuit is simplified to insure undue strain on parts of the truck, resulted. quick action either in initial closing of the motor One object of the invention is to provide in a circuit or subsequent breaking thereof. motor driven vehicle an improved electric circuit Other objects of the invention will be apparent for the motor and a controller therefor wherein to those skilled in the art to which my invention provision is made to break the motor circuit in relates from the following description taken in dependently of the controller upon return move connection with the accompanying drawing, ment; of the latter from any operated position wherein thereof, thereby making it necessary to apply the 40 Fig. 1 is a diagram showing a controller, an vehicle brake in reducing the truck speed and/or electric motor, a circuit for the motor and a con stopping the truck. trol means incorporated therewith embodying my Another object of the invention is to provide invention. an improved controlling means for operating an Fig. 2 is a fragmentary perspective view of th'e electric motor, wherein operation of the motor 45 controller. at high' speed is dependent upon the initial op Figs. 3 and 4 are detail views of parts shown eration of the controller to and dwell thereof at in Fig. 2. a predetermined position. In the drawing, II indicates an electric motor. Another object of the invention is to provide I2 indicates an electrical power supply, prefer in an electric motor circuit having a contactor, ably consisting of a suitable storage battery hav an improved controlling means for the contactor ing leads I3, I4, which through a suitable recep consisting of a closing circuit and a holding cir tacle and plug therefor are connected by leads cuit connected to the motor circuit at opposite I5, I6, respectively, to bus bars on a terminal sides of the contactor and arranged to be alter block Il.» Leads I8, I 9, connect the bus bars with `Vmately closed by and in co-ordinated relation to 55 any other motor (not shown) with which the 2,405,769 É ¿i vehicle may be equipped. Leads 2li, ZI, connect the bus bars with a horn 22, which is controlled iixed to the» adjacent supporting elementl 4I for the controller 23. As shown in Fig. 2, the inter by a push button 22a. mediate portion of the arm 3l" is cut away to 23 indicates as an entirety a controller fixed to a sha t E4 for rotation in one direction to close accommodate a resilient arm 42 carrying a con tact 42d arranged to engage contacts dia', 42a" (see Figs. 3 and Ll) as later set forth. A flipper 43`forrnedof resilient material connects the arms 3l' and 42 together and normally tends to hold them in either of two positions; that is, (a) when the motor circuit, to thereby propel the vehicle forwardly and in the opposite direction to re verse the circuit connection with the motor, whereby the vehicle is propelled rearwardly, the controller and circuits being arranged to provide 10 the arm 3l’ rides fro-n1 the mid-section 31a of three speeds in each direction, but my invention carn 3l' or section 37C into either recess Sib, 31h', is applicable where a lesser or greater number_of vthe iiipper 43 is contracted and effects movement of the arm 42 to the Fig. 3 position to cause en speeds may be provided. The shaft 24 may be operated through suitable >gearing» actuated'fby a lever or wheel (the gearing and lever or wheel gagement of the Contact 42a with the contact Y42d’ >and (h) when the arm 3l’ rides outl of either recess onto either section 37d, Ele, the .flipper ,43 is contracted and forces the outer end not shown). The controller is provided with (a) conductors 23a, 23h, operable to close `the' motor portionsof the arms 3l', 42, apart, whereby the circuit when the motor is driven to _propel the contact 42a engages a contact 42a” (see Figs. 2 vehicle forwardly and (b) conductors 23e, 23d, 2te, operable to close the motor circuit when the 20 and 4). The contacts 42a', 42a”, are carried on the outer ends of resilient arms 42o, 42h', re motor is driven to propelthe vehicle -rearwardly, spectively, »which arms and arm 42 are formed these conductors rbeing arranged to engage con of suitable conducting material, for reasons later tacts «I,-2, 3, ii, 'I, in the manner later set apparent. rThe inner ends of the arms 42, 42h forth. rPhe `motor »circuit consists of the following: 25 andßlilò’ are insulated from each other and rig idly/supported at their inner ends between the in lead 25 connecting one bus bar thro-ugh the mov sulating pads 4%. As will noted in Figs. 3 and 4, able and stationary contacts 25, 25a, respectively, the COntaCtsMâdQfL’lZd", are so spaced that slight onthe supportvfor the contacter indicated as an movement of the arm 42 effects disengagement entirety at 2l, to the armature (indicated atZS) o1" themotor Il, the contact 26 being normally 30 of the »contact 42a `from either thereof and en~ _gagernent with the other-contact and that the disengaged from the contact Eta; leads 29, 30, spring tension of the flipper y43 is arranged to fr‘orn‘the motor armatureto contacts 2, 5, respec operate the arm v¿l2 in either direction-with a tively (the latter lead including «an adjustable snap action, this arrangement and operation be resistor R-B) ; leads 3I,«€?-‘2, connecting lield coils ing advantageous Íto prevent de-energization of 33 of the motor I'Ivwith contacts I, 3, respectively, the coil alla and breaking of the controlling cir -itbeing‘noted that'when contacts 4I Vand 3 are cuit during movement of the contact 4ta from connected through'controller `conductors 23a, 23h, the motor »i l is driveneto propel the vehicle for wardly and -when contacts I »and 3 are connected through'controller conductors-23C, 23e, and a lead _3-4'therebetween, the motor I I is driven to propel the vehicle rearwardly; lead 35 Vconnecting the other-bus bar to contact 'I and having resistors its »engagement with contact 42a’ into engage »ment with contact 42a" due to operation _ofthe controller in either _direction from first speed R-I and -R--2 connected in series therein; Vand ing circuit is‘traced as follows: lead 44 connect ing contact 4 >through a manually operated switch '45;t0 one end of the coil 27a; lead ‘46 >connect ing _the opposite end of the coil Z'l'a 'to the arm 42; contacts 42a, 42a’; arm 4%;‘1ead 4l' connect ing 4arm 42h with that Sectio-n of the lead 25 lead »SB `connecting contact ¿5 tothe remote end . of resistorR-I. The pivotedtcontactêô ispreferably weighted so as tonorrnally be out of engagement with the contactëtìa, but a spring 26a’ is provided to bias it toits normal position, the springfunctioning togive the contact an initial impulse following cle-energization of the coil'Zla. ' ri’he contactor 2l- consists of the switch Ycon tacts ‘26, 26a (already referred to), andan elec tro-magnet the coil-ì-"Ia of which, when energized as ylater set forth, serves to move vthe -movable contact into engagement -withethe contact 26a, vto close thecircuit through the lead 25. 3l indicates a cam (formed of suitable in_su lation material) yiixed to the controller shaft 24 for controlling a circuit indicated as an entirety at The `cam 3l is provided with a mid-sec tion Sla, with which the outer end of -a resilient `position-to second speed position. _The controlling circuit 38 consists of a closing circuit <38a and a holding circuit 38'. The clos which is connected to v,the movable Contact 26; leads ,£6,111 to battery I2; leads I3, I5, andlead 35 to. contact'î. The `holding circuit 'äß’jis .traced `as `follows: leadî44 .connecting contact 4 through theyswitch 4_5'to one end of> the coil'îla; _lead 46 connect ing the opposite endof the coi112la ,to the arm 42; contactsç‘lëâa, 4-2a”; .arm _42b’;'lead 48 con necting arm 142th' Ywith thatsection of the lead _25 which _is connectedto thestationary contact Zta; contacts `2Ela,126, and Yleadyäâ ,to bus-bar; leads I5, I4 to battery i2; leadsiß, ,I5,_,and lead >35 to contact '1. , The switch 45 Yis controlled .byaspring oper arm l3l’ engages whenthe controller -is in “oli” ated pedalpcsitioned vso as to -be cperated'by the or neutral position, recesses S'l’b, 31h', at either side of the mid-section Sla and co-ordinated with the ñrst speed position of the controllerZS when -the latter is rotated in either direction »and a operative when ystanding in vehicle driving po section Slo on which the arm 3l’ rides during movement of the controller in either direction from the first speed position to and from the sec ond and/ or third speed positions back to the ñrst speed position. The inner end of the arm 3l’ is rigidly supported between pads `34 formed of sition. As rthis switch is connected .in the con trolling circuit, preferably îthe lead vwhich is con nected to one end of the coil Ella, itfollows that upon release of'this foot operated pedaLthe ccn~ ,trolling .circuit `is broken, so that Aoperation of the controller `in.either*direction will be «ineffec tive. ' Operation: With the brake released'and pedal switch 45closed, operation of the controller and insulating material and supported on a bracket 44 75 cam '3l ' (clockwise as shown in ~Fig. l) will ef 2,405,769 5 6 feet closing of the circuits 38a, 38', opening of versed, the voltage drop will allow the movable contact 26 to disengage the contact 26a and thus the circuit 38a and engagement of the control-` ler conductors 23a, 23h, with the contacts l to 1, open the motor circuit. Due to the fact that upon opening of the motor circuit the voltage imme diately builds up in the battery, the movable con tact will engage the contact 26a, following which engagement, due to drop in the voltage, the con inclusive, in the following manner: In this move ment of the controller 23, certain of the con tacts l, 2, 3, 4, 5, 6 and 1 will be connected by the controller conductors 23a, 23h, in the first, second and third speed positions thereof indicated tact 26 will immediately disengage the contact 26a. Accordingly, this engagement and disen at a, b, c, respectively. In the reverse movement of the controller 23, certain of the contacts Will be connected by the conductors 23C, 23d, 23e, in the first, second and third speed positions there gagement of the contacts will continue unless or until the operative applies the vehicle brake (thereby opening the controlling circuit through of indicated at a', b', c', respectively. In the ñrst speed position, the arm 31’ will ride into recess 31b, thereby effecting engagement of contact 42a with contact 42a’ to close the closing` circuit 38a through leads 44, 41, and coil 21a. the switch 45) or returns the controller to neutral position. By reason of the fact that in propelling the ve hicle in either direction the controller must be held in its ñrst speed position until the movable If the controller is held or dwells in this position, contact 26 is actuated it becomes impossible to long enough for the ñux to build up in the coil drive the motor in the event the controller is 21a, the switch contact 26 will be moved into en-~ 20 operated to the second and/or third speed posi gagement with contact 26a to close the motor cir~ tion without the dwell at the ñrst speed position; cuit, whereupon the controller may be moved to and since, with the motor running in one direc second and third speed positions; however, if the tion, operation of the controller to reverse the controller is moved to the second speed position4 current to the motor will be ineffective to supply without making the “dwell” above referred to, 25 current thereto, the operative is compelled to the motor circuit will remain open, since the coil apply the vehicle brake to stop the motor whether 21a will not be energized and effect closing of the vehicle is to be brought to a stop or its direc the contacter switch 26-26a. If the “dwell” at tion of movement is to be reversed. The coil 21ov the first speed position is made, operation of the is removable so that it may be changed where the controller to second speed position will, through 30 power supply is increased 0r decreased to insure engagement of conductor 23h with contact 6, con a balanced relation between it and the voltage nect lead 36 in the motor circuit to reduce the in the motor circuit. current through the ñeld coils of the motor. In From the foregoing description it will be ob this operation of the controller, the arm 31’ will served that the operation of the contacter 21 is ride out of the recess 31h onto cam section 31e, controlled by the circuit 38, which is initially thereby moving arm 42 to effect engagement of contact 42a thereon with contact 42a" to close closed and maintained closed or opened by the cam 31, and not through any conductor or con the holding circuit 38' of the controlling circuit:l tact portion on the controller drum, thereby en-38. As will be observed, the closing of the hold-1 abling me to provide a controller for the motor ing circuit maintains the coil 21a energized, so 40 circuit having a minimum quantity of conductor that the motor circuit through contactor switch material (for example, copper) necessary to com2li-26a remains closed. If the controller 23 is moved to the third speed position, controller con ductor 23h engages contact 5 to connect in the adjustable resistor R-3. As will be observed, in the movement of the controller 23 to third speed position and back to second speed position, the arm 31’ rides on the cam section 31o so that the plete the motor circuit for the different speed po sitions in either driving direction. Accordingly, 45 as compared to the form of controller construc~ tion shown in my Letters Patent No. 2,140,564, dated December 20, 1938, a substantial saving in the quantity of metal on the controller results and permits a reduction in the number of con tact carrying arms 23’ (see Fig, 2) and total holding circuit 38’ remains closed; but (a) if the controller 23 is moved back to the ñrst speed pos- 50 length of the controller to facilitate the mounting of other operating equipment on the vehicle sition the arm 31’ rides into the recess 31h and effects engagement of contact 42a with contact frame. 42a’ to break the holding circuit 38’ and close To those skilled in the art to which my inven the closing circuit 38a, whereas movement of the tion relates many changes in construction and controller 23 to neutral position opens the clos widely differing embodiments and applications of lng circuit through coil 21a to de-energize the the invention will suggest themselves without de latter and break the motor circuit through the parting from the spirit and scope thereof. My contacts 26, 26a. disclosures and the description herein are purely In the operation of the controller 23 to propel illustrative and are not intended to be in any sense limiting. the vehicle rearwardly, it and cam 31 are rotated What I claim is: counterclockwise (as viewed in Fig. 1) to the ñrst speed position a’. In such movement, con 1. In controlling means for a motor circuit, the ductors 23e, 23e, engage contacts 1, 3, respective the holding circuit 38' closed if the controller is operated to second speed position b’ in the man combination with a motor, a controller and a source of current supply, of a circuit for the motor connected to lsaid source of supply, and control ling means for said motor circuit comprising a closing circuit, a holding circuit and a contactor ner already described in operating the controller consisting of normally disengaged contacts in one and cam clockwise, provided a “dwell” at the ñrst lead of said motor circuit arranged to close and ly, and arm 31' rides into the recess 31h’ to close. the closing circuit 38a, which is then opened and speed position a’ takes place. 70 open it and an electro-magnet for operating one of said contacts in one direction to engage the The coil 21a of the electro-magnet is balanced with respect to the power supply and resistance other contact, the coil of said electro-magnet value of the resistors R-|, R-Z and R-3 and being in series with said closing and holding cir the motor, so that if the latter is running in one cuits and said closing circuit being connected to direction and the current supply thereto is re 75 said lead at one side of said contactor and said 2,405,769 7 8 holding circuit being connectedto said lead at the 3'. In controlling means. for a motor circuit, the combination with` a’ motor, a> controller and a source of current supply, of a circuit for the motor connected to said source of supply, -and control ling means for said motor circuit comprising av closing circuit, a holding circuit and »a contactor consisting of stationary and movable contacts in other side of saidy contactor, aV device synchronized with the movement of said controller and a switch. operated by said device to close said closing cir cuit and open said holding circuit `when-.the con troller is moved to one operating position and open said closing circuit and close said holding circuit when said controller is moved to another operating position. 2. In controlling means for a motor circuit, the combination with a motor, a contro-ller and a source of current supply, of ay circuit for the ‘motor one» lead of »said motor circuit in normally dis-y engaged relation and- arranged to close and openl it‘and an electro-magnet for` operating said mov able contact in one direction` said'closing andv holding circuits consisting of a lead in whichL the> coil oi’ said magnet is series connected, a lead for said closing circuit connected to said movable connected to said source of supply, and control.'h ling means for said motor circuit comprising a closing circuit, a holding circuit and a contactor 15 contact and a lead' for said holding consisting of stationary and movable contacts in nected to said stationary contact, a one lead of said motor circuit arranged to close mally connected to> said lead for said and open it and an electro-magnet the coil of cuit an'd arranged to be connected which is in series with said closing and holding for‘said closing circuit and' a' device circuit con switch nor# holding cir to the lead iixed to the circuits, said closing circuit being connected to 2.0 shaft for said’ controller operable to disengage said movable contact and arranged to be closed said switch' from the lead for said holding circuit when said controller is moved to its ñrst speed po~ and move it into engagement with the leadl for sition and said holding circuit being connected said closing circuit upon movement of the con to said stationary Contact and arranged to be troller to its ñrst speed position and to disengage closed when said controller is moved to a higher 25 said switch from the lead for said closing circuit speed position, a switch arranged to close» said and move it into engagement with the lead for closing circuit and open said holding circuit when said holding circuit upon movement of said c-on the controller is moved to its first speed position troller to a higher speed position, the operation of and open said closing circuit and close said hold Said electro-magnet to operate said movablecon ing circuit when said controller is` moved to a higher speed position and a cam ñxed to the shaft tact being dependent on the dwell of the con for said controller for controlling the operation of said switch during movement of said controller. troller at the ûrst speed position. FRAl‘llEív STONER.