US1253515A - Change-making machine. - Google Patents
Change-making machine. Download PDFInfo
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- US1253515A US1253515A US3999115A US3999115A US1253515A US 1253515 A US1253515 A US 1253515A US 3999115 A US3999115 A US 3999115A US 3999115 A US3999115 A US 3999115A US 1253515 A US1253515 A US 1253515A
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- coin
- chute
- lever
- machine
- change
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07D—HANDLING OF COINS OR VALUABLE PAPERS, e.g. TESTING, SORTING BY DENOMINATIONS, COUNTING, DISPENSING, CHANGING OR DEPOSITING
- G07D1/00—Coin dispensers
Definitions
- The'coine ecting mechanism consists of State of Illinois, have inventedcertain new F igl8jis avieiv similar to Fig. 1 showing and u. eful Improvements in Change-Makmechine as provided ivithacoin deliv- 1 ing Machines,,ofwhich the jjollo vinggfis a cry chute adapted particularlyforiiiling specification. pay envelops, orftheilike.
- L i 'lVly invention relates to cliange ma king Fig. 9 is a vieivsimilar to Fig.
- 1Q is a View; ii laerspective, of a coin containing and ejecting means 3v hereby the ejecting'cbute providedivith means tor preoperation of ejecting vthe coins maybe very venting the coin from being only partly rapidly performed ithout danger offinejected from the coin pocketgand r accuracies.
- the inve ntionpz oyides"further Fig. 11 is a similar view of the coin chute 20 a, construction wherebythe machine, byperemployed in the machine illltistra edFin tain simpler substitutions of iparts can be Fig; 9.
- livering change directto a customer or for Referring first to Figsfl to 7 inclusive,
- the lO'iVeif member is prefer of features of construction to,be. hereirrafter ablyformedivith pockets 80 for -ubbefpads described and claimed ivillibe positivein 31.
- the lower casing member is formed 35 its action-andnvilhnot be likely to. get out ⁇ vitha horizontal. web oibase"plate 32Which iof orderievenwhen some vliat'roughly used. doesnot extend to the back edgeo'fthe das- Other advantageous features: ofgconstrncing.
- Theupper casing member'isforined tion will appear from the .follov ing descripwith Webs 33 providing coin "pocketsbii tion. I adapted to receive stacks of coins.
- the lever is formed with an angular projection providing a member or plate 41 which is substantially parallel with the body of the lever.
- the lever 39 is in the form of a bell crank having a short arm 45 which has a rotative and slidable engagement with a lever 46 fulcrumed on a rod l7 which latter is mounted in the casing member 25 below rod 42.
- the lever to is also preferably formed with an angular projection 4:8 similar to the angular projection4l of the lever 39 and serving the same purpose.
- the lever 46 extends around and above the lever 39 and terminatesin a rounded end H) which projects through a slot 50 in the coin ejecting slide-3S.
- the engagement between the short arm of lever 46 is shorter than the thereof.
- the rounded end of the short arm 45 0f the manipulating lever 39 can slide as well as rotate between the lugs 51,' this being necessary in view of the diiferen'ce in radius between the engaging arms.
- the coin ejecting slide 3S is formed with down turned flanges 52 which lie in'slots formed in the base plate 32.
- the base plate is also formed with a slot 54 between slots 53 through whichthe end of lever ⁇ LG-ex-
- the lever 46 is formed with a projection 55 connected to a helical spring 56.
- the other end of the spring is anchored to a rod 57 which is bound against a rib 5S 7 on the under side of the base plate by means of cotter pins 59.
- the several units constructed as above described are arranged side by side with the spacing projection of each lever bearing against the body portion of the adjacent lever.
- the end levers are preferablyheld in proper position by spacingsleeves 60, 61.
- the manipulating levers 39 extend through slots 64 in the front plate 26. 3 The length of these slots is such that the levers 39 cannot be depressed far enough to throw the corresponding slide engaging levers into such position that the latter will not be automatically returned by springs 56 to their normal positions when the pressure ofthe fingers is taken from the keys.
- This chute is made of sheet metal. preferably, and is'reinovably arranged within thelower casing member 25 with its delivery end communicating with an opening (36 in the end wall ie of the casing. In fact, the chute requires no attachment to the casing. It has enough spring to hold it in the proper position; To the outside of the casing is attached a coin delivery chute 6 7 which is preferably formed with a bend toward the sideof themachine opposite to the side on which the keys are arranged.
- the end wall 44 of the casing is formed with slots 68 and the chute with hooks 69 which enter the slots.'
- the engagement is preferably made more firm-bya screw 70 which extends through a .lug:71 on the chute and into the end wall 44:.
- the receiving chute 65 is preferably formed with a lip 72 which overlaps the'delivery chute a trifle.
- the delivery chute is preferably provided with a cross piece 73 which stands far e'nough'above the bottom of the chute so that it intercepts any rolling coin and causes the same" to drop on its side andin that the chute.
- the constructionof the ejectingmechanism is such that the coin is ejectedby'a manner slide the rest of the way through.
- the upper casing member is formed at the pockets with a plurality of notches 74. and the keys 38 are similarly formed on their inner ends war notches 7 5. This permits a pencil or other thin instrument to be inserted under the forward edge of the stack so as to raise it sufliciently to allow the slide to be brought against the lowermost coin or partially ejected coin.
- Fig.8 I have shown a machine, in all other respects like the machine just described, which is provided with a discharge chute 67 intended particularly for deliven ing change to pay envelops, or the like.
- the chute is shown as formed with hooks 69 adapted to engage the end of the casing of the machine through the slots 68, and with a screw 7 O for binding it to the casing.
- the intention is to have the machine furnished with two chutes of thesort above described either one of which can be usedas required.
- Fig. 9 I have shown the same machine with certain parts interchanged so that the coins will be delivered to the side of the ma chine at which the keys are located so that the change may be handled by the operator.
- This is the usual way in which the change ejected by change making machines is handled and while I consider that the immediate delivery of the change to the customer, or into the pay envelop as provided by the constructions previously described, Wlll be orconsiderable advantage, it may happen that under some circumstances it will bemore desirable for the person who operates the machine to collect the coins ejected by the machineand give them to the customer or make such other disposition'of the same. as the circumstance calls for.
- the front plate 26 of the machine as previously described is removed, together with the receiving chute 65, and for the latter a chute 76 (Fig. 11) is substituted.
- the chute 7 6 is provided with a slotted lug 77 adapted for engagement with the screw 29 which holds together the rear edges of the upper and lower casing members 27, 26.
- At the forward end of the chute are slotted brackets 7 8 which hook over the ends of the rod l7 on which the slide engaging levers 46 are fulcrumed.
- a front plate 79 is substituted for the front plate 26. The coins ejected from the stacks fall into the chute 76 and are delivered to the front side of the machine, that is, to the side at which the operating keys are located.
- the slide 38 (Fig. 10) has attached to the inner end thereof a bar 80 formed at its extremity with an upstanding leg 81.
- the bar projects from the slide a distance equal, substantially, to the diameter of the coins of the stack operated upon.
- the bar moves in the slot 54.- of the base plate formed for the accommodation of the end of the slide engaging lever a6. It lies, nor mally, directly under the stack of coins.
- the manipulated lever 39 If the manipulated lever 39 is given its full stroke so that the coin operated upon is completely freed from the stack of coins above it, the coin will readily fall from the bar 80 into the receiving chute. On the other hand, if the manipulated lever is not depressed sufficiently the lug 81 on the bar 80 engages the coin and returns the same to its normal position under the stack when the operating levers are returned to their positions of rest by the spring 56. By this expedient it is impossible, if a coin is partially ejected, through careless operation, for the coins above it to take an oblique position blocking the further operation of the ejecting mechanism.
- Resume 07' operation With the coin pockets filled with coins of the proper denomination, change is made by depressing the manipulated levers corresponding to the different coin stacks.
- the throw of the manipulated levers is relatively short.
- the movement of the ejecting slides 38 is, nevertheless, very rapid because of the compound lever arrangements by which the slides are operated.
- the engagements between the le vers 39 and the corresponding slide engag ing lev rs i6, and between the latter and the slides, are very free so that the apparatus responds to a light touch and the possibility of the parts sticking or clogging is eliminated.
- the coins are ejected directly into the receiving chute. The action is, therefore, simple and positive.
- the machine can be run at a high rate of speed which is particularly important perhaps when it is used for placing change in pay roll envelops.
- the machine is preferably provided with the delivery chute 67 (Fig. 8). If the ma chine is to be used for delivering change directly to a customer. in a store or restaurant for example, the chute 67 is removed by loosening screw 78 and uuhooking the chute from slots 68 and the chute 67 is put in its place. This chute delivers the coin toward the side of the machine away from the operator, that is, the side toward the customer, so that the operator does not have to handle the coins at all.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Vending Devices And Auxiliary Devices For Vending Devices (AREA)
Description
F. A. NIEMANN.
CHANGE MAKING MACHINE.
APPLICATION 111:0 JULY 15.1915.
11 ,,%53 51 5 .1 Patented .1 an. 15, 1918..
4 SHEETSSHEET I.
N CNY'OR. mamm' F. A. NIEMANN. CHANGE MAKING MACHINE. APPLICATION FILED my 15. l9l5- Patented Jan. 115, 1918.
4 SHEETSSHEET 2.
26. A my;
F. A. NIEMANN.
CHANGE MAKING MACHINE.
APPLICATION FILED JULY 15.1915.
4 SHEETS-SHEET 3- F. A.-I HEIVH-\NI I..
CHANGE MAKlNG MACHINE.
APPLICATION man JULY 15.1w).
11v V LN TOR. fiflmm A TTORNE YAI Patented Jan. 15,1918.
4 SHEETS-SHEET 4 UNKTED %TATE% PATENT @FFIHOE FREDERICK A. CHICAGO, ILLINQIS, ASSIGNOR TO NIEMANN AND COMP ANY, OF CHICA GOJ QLQINOIS, .A. CORPQB,ATION OF ILLINOIS."
QHANGE-MAKING MACHINE.
, t pecifi e ion L tters Pa 1 Patented Jan 15,1918.
To all whom it mag concern.-
Be it known that I, Ennnnnror: A. MANN, a citizen of the United,fitates jresiding-at Chicago inithe co untyof Cook and fion, the machine in this ;case b eing shown 1 as provided Wltlijt chute adapted part cuejecting Slides.
1 and coin eje Fig. Gis a similar view of one ofthe coin Fig. 7 is a view, in perspective, of the a Liv r inner or coin receivi'n'g chute.
ranged thereon.
The'coine ecting mechanism consists of State of Illinois, have inventedcertain new F igl8jis avieiv similar to Fig. 1 showing and u. eful Improvements in Change-Makmechine as provided ivithacoin deliv- 1 ing Machines,,ofwhich the jjollo vinggfis a cry chute adapted particularlyforiiiling specification. pay envelops, orftheilike. L i 'lVly invention relates to cliange ma king Fig. 9 is a vieivsimilar to Fig. 2 illustrat- 1O machines, and its object is to provide cering the machine-asprovided vitha coin 55 tain improvements in machines o f this sort chute Which delivers thjcoins througlrthe which will be herfiihaiter more fullytie front plate under the operating "keys so scribed and claimed. To briefly enpm'erate that they may be conveniently collected by certain of these impro ge nents the invention the; person operating theinachinei 15 contemplates Ithe construction of the coin Fig. 1Q is a View; ii laerspective, of a coin containing and ejecting means 3v hereby the ejecting'cbute providedivith means tor preoperation of ejecting vthe coins maybe very venting the coin from being only partly rapidly performed ithout danger offinejected from the coin pocketgand r accuracies. The inve ntionpz oyides"further Fig. 11 is a similar view of the coin chute 20 a, construction wherebythe machine, byperemployed in the machine illltistra edFin tain simpler substitutions of iparts can be Fig; 9. adapted for several difierent us es ior eX- V Likecharacters of reference designate like ample, for filling payroll envelops for des parts in the several figures of the drawings. livering change directto a customer or for Referring first to Figsfl to 7 inclusive,
25 delivering the-change to the operator in the the casing of the machine isshown aseonusual manner. sisting of a lower casing member 25 preffurtherobject of the invention is to erably closed in front by a frQnt pliitcQG provide a change; making machine vhicb andan upper casing memberQTL The front will be very simple in its construction, ecoplate 26 is removabiy secured to the loiver e30 nomical of manufacturee(the machine being member 25 by screivs 28. The upper ni'emmade-01 a relatively small number offstanip ber 27 is secured to the lower niember 25 tings andcastings) and one which bec ause by screws 29. The lO'iVeif memberis prefer of features of construction to,be. hereirrafter ablyformedivith pockets 80 for -ubbefpads described and claimed ivillibe positivein 31. The lower casing member is formed 35 its action-andnvilhnot be likely to. get out \vitha horizontal. web oibase"plate 32Which iof orderievenwhen some vliat'roughly used. doesnot extend to the back edgeo'fthe das- Other advantageous features: ofgconstrncing. Theupper casing member'isforined tion will appear from the .follov ing descripwith Webs 33 providing coin "pocketsbii tion. I adapted to receive stacks of coins. Above 1 440 The invention is illustrated in certain prethe coin pockets the Web 35 of the upper .ferred embodiments, in the accompenying casing member issiantcd backvvardly and drawings wherein rec'essedso as toiorm inclinecbchutes 36 Figure 1 is a ,vieiv in perspecti ve, of a Which deliver the coiiisinto the cam-se kers. change making machine [constructed ac- The front portion 37 of the upper "cfi' ing n45 cordance with the principles of myiinv enmember forms a cover for'tlie base plate1232 customer. a ejecting units, one operating iii connection 50 ,Fig. 2 s a iertlcal sect onal view of the ivlth each oi: the "coin pockets,""ivhici are i .machine shown in Fig. '1. f just alike except in the one respect 'to' be "fFigsn3 and, 4l are,sectional vieiv s ta ken on hereinafter notedL. The uiiit iorejecting lines 3-3 and M respectively, of 2. ,fifty cent pieces is shown in Figsffi'and 5 Fig. 5 is a View, inper'sPective,qt one "land it Will be sufficient to describe this'sin; 1 55 .unitr'of the ,ejecting ,mechanifsm. fgle' unit esiselever reteensem d tends.
out of sheet metal and provided with'a' finger. piece or key ll). The lever is formed with an angular projection providing a member or plate 41 which is substantially parallel with the body of the lever. The
lever is mounted .on a rod L2 which is fitted in openings in the end walls 43, ll of the lower casing member. The rod passes through the spacing plate 4:1 as well as through the main portion of the lever. In this manner the lever has a double bearing on the rod which prevents it from wabbling even though it is made of relatively thin metal. The lever 39 is in the form of a bell crank having a short arm 45 which has a rotative and slidable engagement with a lever 46 fulcrumed on a rod l7 which latter is mounted in the casing member 25 below rod 42. The lever to is also preferably formed with an angular projection 4:8 similar to the angular projection4l of the lever 39 and serving the same purpose. The lever 46 extends around and above the lever 39 and terminatesin a rounded end H) which projects through a slot 50 in the coin ejecting slide-3S. The engagement between the short arm of lever 46 is shorter than the thereof. The rounded end of the short arm 45 0f the manipulating lever 39 can slide as well as rotate between the lugs 51,' this being necessary in view of the diiferen'ce in radius between the engaging arms.
The coin ejecting slide 3S is formed with down turned flanges 52 which lie in'slots formed in the base plate 32. The base plate is also formed with a slot 54 between slots 53 through whichthe end of lever {LG-ex- The lever 46 is formed with a projection 55 connected to a helical spring 56. The other end of the spring is anchored to a rod 57 which is bound against a rib 5S 7 on the under side of the base plate by means of cotter pins 59.
. The several units constructed as above described are arranged side by side with the spacing projection of each lever bearing against the body portion of the adjacent lever. The end levers are preferablyheld in proper position by spacingsleeves 60, 61.
'In order that twenty cents in change be ejected by a single operation I haveprovided the machine with two ten;cent coin pockets 34 3t". Thecoin ejecting slide 38, forming a part of a coin ejecting unit, the key 40 of which is marked 10,- is moved, when key 40 is depressed independently of the mechanism that ejects coins from the other ten cent pocket 31".- The .38 ejects a coin'from pocket 34?, andat the same time slide 3S is moved to eject a coin from the pocket 34.
The manipulating levers 39 extend through slots 64 in the front plate 26. 3 The length of these slots is such that the levers 39 cannot be depressed far enough to throw the corresponding slide engaging levers into such position that the latter will not be automatically returned by springs 56 to their normal positions when the pressure ofthe fingers is taken from the keys.
The coins ejected from the coin pockets are pushedoverthe rear marginal edge of base plate 32 and fall into an inclined receiving chute 65. This chute is made of sheet metal. preferably, and is'reinovably arranged within thelower casing member 25 with its delivery end communicating with an opening (36 in the end wall ie of the casing. In fact, the chute requires no attachment to the casing. It has enough spring to hold it in the proper position; To the outside of the casing is attached a coin delivery chute 6 7 which is preferably formed with a bend toward the sideof themachine opposite to the side on which the keys are arranged. The end wall 44 of the casing is formed with slots 68 and the chute with hooks 69 which enter the slots.' The engagement is preferably made more firm-bya screw 70 which extends through a .lug:71 on the chute and into the end wall 44:. The receiving chute 65 is preferably formed with a lip 72 which overlaps the'delivery chute a trifle. The delivery chute is preferably provided with a cross piece 73 which stands far e'nough'above the bottom of the chute so that it intercepts any rolling coin and causes the same" to drop on its side andin that the chute. V V
The constructionof the ejectingmechanism is such that the coin is ejectedby'a manner slide the rest of the way through.
sharp, quick movementof the ejecting slide.
If the machine be properly operated the coins will be ejected-without fail. By a tion preventing the slide when actuated again from reaching the partially ejected coin. In order to straighten the stack the upper casing member is formed at the pockets with a plurality of notches 74. and the keys 38 are similarly formed on their inner ends war notches 7 5. This permits a pencil or other thin instrument to be inserted under the forward edge of the stack so as to raise it sufliciently to allow the slide to be brought against the lowermost coin or partially ejected coin.
In Fig.8 I have shown a machine, in all other respects like the machine just described, which is provided with a discharge chute 67 intended particularly for deliven ing change to pay envelops, or the like. The chute is shown as formed with hooks 69 adapted to engage the end of the casing of the machine through the slots 68, and with a screw 7 O for binding it to the casing. The intention is to have the machine furnished with two chutes of thesort above described either one of which can be usedas required.
In Fig. 9 I have shown the same machine with certain parts interchanged so that the coins will be delivered to the side of the ma chine at which the keys are located so that the change may be handled by the operator. This is the usual way in which the change ejected by change making machines is handled and while I consider that the immediate delivery of the change to the customer, or into the pay envelop as provided by the constructions previously described, Wlll be orconsiderable advantage, it may happen that under some circumstances it will bemore desirable for the person who operates the machine to collect the coins ejected by the machineand give them to the customer or make such other disposition'of the same. as the circumstance calls for. In order to modify the machine in such manner that the ejected coins can be conveniently handled by the person who operates the machine, the front plate 26 of the machine as previously described is removed, together with the receiving chute 65, and for the latter a chute 76 (Fig. 11) is substituted. The chute 7 6 is provided with a slotted lug 77 adapted for engagement with the screw 29 which holds together the rear edges of the upper and lower casing members 27, 26. At the forward end of the chute are slotted brackets 7 8 which hook over the ends of the rod l7 on which the slide engaging levers 46 are fulcrumed. A front plate 79 is substituted for the front plate 26. The coins ejected from the stacks fall into the chute 76 and are delivered to the front side of the machine, that is, to the side at which the operating keys are located.
I have shown in connection with the machine of Fig. 9 a slight modification in the construction of the coin ejecting slides which, however, could be used as well in connection with. the machines previously de-' scribed. The slide 38 (Fig. 10) has attached to the inner end thereof a bar 80 formed at its extremity with an upstanding leg 81. The bar projects from the slide a distance equal, substantially, to the diameter of the coins of the stack operated upon. The bar moves in the slot 54.- of the base plate formed for the accommodation of the end of the slide engaging lever a6. It lies, nor mally, directly under the stack of coins. If the manipulated lever 39 is given its full stroke so that the coin operated upon is completely freed from the stack of coins above it, the coin will readily fall from the bar 80 into the receiving chute. On the other hand, if the manipulated lever is not depressed sufficiently the lug 81 on the bar 80 engages the coin and returns the same to its normal position under the stack when the operating levers are returned to their positions of rest by the spring 56. By this expedient it is impossible, if a coin is partially ejected, through careless operation, for the coins above it to take an oblique position blocking the further operation of the ejecting mechanism.
Resume 07' operation. With the coin pockets filled with coins of the proper denomination, change is made by depressing the manipulated levers corresponding to the different coin stacks. The throw of the manipulated levers is relatively short. The movement of the ejecting slides 38 is, nevertheless, very rapid because of the compound lever arrangements by which the slides are operated. The engagements between the le vers 39 and the corresponding slide engag ing lev rs i6, and between the latter and the slides, are very free so that the apparatus responds to a light touch and the possibility of the parts sticking or clogging is eliminated. The coins are ejected directly into the receiving chute. The action is, therefore, simple and positive. There is no danger if the machine is properly operated that the proper coin will not be ejected at every depression of the key. The machine can be run at a high rate of speed which is particularly important perhaps when it is used for placing change in pay roll envelops. lWhen the machine is used in this connection it is preferably provided with the delivery chute 67 (Fig. 8). If the ma chine is to be used for delivering change directly to a customer. in a store or restaurant for example, the chute 67 is removed by loosening screw 78 and uuhooking the chute from slots 68 and the chute 67 is put in its place. This chute delivers the coin toward the side of the machine away from the operator, that is, the side toward the customer, so that the operator does not have to handle the coins at all.
If through careless operation a coin should not be fully; ejected, with the result that thecoins in the stack above take an oblique position blocking the further opera tion of the ejecting apparatus, this may be remedied by placing a pencil through the notch 7% in the casing and the corresponding notch 75 in the end of the slide and raising the forward'cdge oi the stack su'fliciently to allow the slide to pass and come into contact with the partially ejected coin. If the slides are constructed as shown in Fig. 10, the tilting of the stack cannot occur under such circumstances, but the provision of the slides with the projections 80 makes the ejecting action a trifle slower so that, where the highest rate of operation is desired, I prefer not to employ this feature. When it is desired to have the operator handle the change the inner or receiving chute 66 is removed, together with the'front plate 26', and a chute 7 6 (Fig. 9) which deliversthe coins to the front of the machine, under the front plate 79, is put in place of the otherchute.
While I have described my invention in certain preferred embodiments, it will b understood that further modifications might be made without departure from the principles of the invention. Therefore I do not Wish to be understood as limiting the invention to the particulars described and shown except so far as certain of the claims are specific thereon.
I claim: I
1. In a change making machine, the combination of a coin ejecting slide formed with a slot, a lever, one end of which is rounded and projects into said slot, a manipulated lever, and means providmg a connection whereby lost motion is prevented between I armprovided with a finger' key. 7
prising a rounded end on one of said levers and a socket to. receive the sameformed on the other lever in which sa d rounded end.
may have movement botho1 rotation and translation; the arm of the slide engaging lever thus connected with the other lever being longer than the connected. r r j 1 3. In a change making machine, the comarm-to which it is bination of a coin ejecting slide formed with a slot, a lever having a longer arm terminatmg in rounded end engag ng said slide through the slot, and a short arm formed with a laterally extending pair of lugs pro viding a socket, a lever fulcrumed above said first named lever havingian arm terminating in a rounded element the periphery of which projects between and bears against the-lugs of the first named lever," and. an
4. Ina change making machine, the combination of a casing provided with a coin pocket, an ejecting slide provided with a hooked extens on on ts e ecting end which is narrow relative to the diameter .of the coin operated upon and in length, is substantially thesame as the diameter of said coin.
FREDERICK A. NIEMANN. l 'Witnessesp v V r j H LQA FALKENBEltG, G Y'. SKINNER,
Copies of this patent may be obtained for five cents each, by addressing the Commissioner oI'Pateiats,
' Washington, D. (1. i
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US3999115A US1253515A (en) | 1915-07-15 | 1915-07-15 | Change-making machine. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US3999115A US1253515A (en) | 1915-07-15 | 1915-07-15 | Change-making machine. |
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US1253515A true US1253515A (en) | 1918-01-15 |
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US3999115A Expired - Lifetime US1253515A (en) | 1915-07-15 | 1915-07-15 | Change-making machine. |
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1915
- 1915-07-15 US US3999115A patent/US1253515A/en not_active Expired - Lifetime
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