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US3746018A Expired / Lapsed US ⏱️ 0.0 years remaining

Change making device

Assignee: VENDALL MACHINES Ltd
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Filing: 1971-10-26
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Granted: 1973-07-17
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Expires: 1991-10-26
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Abstract

Abstract A device is disclosed which is adapted to cut off the flow of energization current to a change-making device when it continues to function in the change-making cycle, instead of stopping when it is supposed to. Associated with a motor that operates the device there is a cylinder and piston arrangement. The initial cut-off to stop the device is effected by a cam lobe, associated with a gear driven by the motor, actuating a lever that moves latches, which have ensnared a switch lever arm, to free the switch lever arm. When the switch lever arm becomes jammed or the normally open switch attached to the arm remains in the closed position for any reason, a cam lobe, formed on the cylinder which is moved from an inoperative to an operative position when rotated in unison with the first mentioned cam, wipes the actuating button of a normally closed switch, which is incorporated in the motor energizing circuit in series with the initial actuating switch, to break the circuit and shut the machine off. The cylinder is slidably mounted on a piston which is provided with a cam track that co-acts with a cam follower formed in the cylinder to raise the cylinder from an inoperative to an operative position. In normal operation the cam follower leaves the cam track and the cylinder descends from the operative position before the cam lobe thereon has reached the actuating button of the normally closed switch. The cylinder, however, has a lateral projection and a wire rod engages under this projection to maintain the cylinder in the operative position after the cam follower has left the cam track, if the motor continues to run after it should have been stopped. The wire rod is normally biassed to a position under the projection, it forming the lower part of a pivotally mounted arrangement, the upper part of which is normally spaced from an end of the motor armature. The motor is of the type which has a longitudinally movable armature and the latter moves to hold the wire rod in its normal position when the motor is energized. If the motor is de-energized at the proper time, the wire rod is simply displaced by the projection as the cylinder descends.

Inventors

  • 👤 W Stewart

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 07:53
CPC Classifications
G; G07; G07D; G07D1/00; G07D1/02; G07D1/04

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 302 words
A change-making device comprising a frame, a plate member secured to said frame and defining a passageway for a coin of a pre-selected denomination therebetween, coin tube means mounted on said frame for storing coins of smaller denomination, a dispensing means for dispensing coins from said tube means, a motor mounted on said frame, driving means connecting said motor and said dispensing means, a circuit including said motor, a first switch in said circuit being arranged to be closed by a coin passing through said passageway and thereby connecting said motor to a source of energy, holding means for maintaining said first switch closed until said motor has driven said dispensing means through a complete cycle to dispense a pre-selected number of coins from said tube means, a second switch in said circuit in series with said first switch, said second switch being normally closed, a second switch acutator member movable between a first position and a second position, said actuator member being moved to said second position by said motor when it is running but being normally biased to said first position, said second switch being actuated by said actuator member in its second position to stop the motor if said motor continues to run after completion of a said complete cycle, said actuator member for said second switch comprising a cylinder adapted to slide on a piston secured to said frame, cam means formed on one of said piston and cylinder adapted to coact with a cam follower on the other of said piston and cylinder when said cylinder is rotated, to raise said cylinder from an inoperative position to an operative position, and a cam lobe formed on the exterior of said cylinder adapted to actuate said second switch when the first mentioned switch fails to open said circuit.
Claim 2
Dependent Claim 302 words
A change-making device comprising a frame, a plate member secured to said frame and defining a passageway for a coin of a pre-selected denomination therebetween, coin tube means mounted on said frame for storing coins of smaller denomination, a dispensing means for dispensing coins from said tube means, a motor mounted on said frame, driving means connecting said motor and said dispensing means, a circuit including said motor, a first switch in said circuit being arranged to be closed by a coin passing through said passageway and thereby connecting said motor to a source of energy, holding means for maintaining said first switch closed until said motor has driven said dispensing means through a complete cycle to dispense a pre-selected number of coins from said tube means, a second switch in said circuit in series with said first switch, said second switch being normally closed, a second switch acutator member movable between a first position and a second position, said actuator member being moved to said second position by said motor when it is running but being normally biased to said first position, said second switch being actuated by said actuator member in its second position to stop the motor if said motor continues to run after completion of a said complete cycle, said actuator member for said second switch comprising a cylinder adapted to slide on a piston secured to said frame, cam means formed on one of said piston and cylinder adapted to coact with a cam follower on the other of said piston and cylinder when said cylinder is rotated, to raise said cylinder from an inoperative position to an operative position, and a cam lobe formed on the exterior of said cylinder adapted to actuate said second switch when the first mentioned switch fails to open said circuit.
Claim 3
Dependent Claim 61 words
A change-making device as defined in claim 1, wherein said first switch has a switching arm extending into said passageway, said switching arm being normally biased to a first position in which said first switch is open, said switching arm being arranged to be moved by a coin passing through said passageway to a second position for closing said first switch.
Claim 4
Dependent Claim 98 words
A change-making device as defined in claim 1, wherein said first switch has a switching arm extending into said passageway, said switching arm being normally biased to a first position in which said first switch is open, said switching arm being arranged to be moved to a second position for closing said switch by a coin passing through said passageway, and wherein said holding means includes a latch arranged to hold said switching arm in its second position, and means driven by said motor for releasing said switching arm from said latch at the end of said cycle.
Claim 5
Dependent Claim 90 words
A change-making device as defined in claim 3, wherein said latch is pivotally attached to said frame and is biased to a first position, and wherein a recess is provided in said latch for receiving and holding said switching arm when said latch is in its first pOsition, said latch being arranged to be pivoted from its first position by said switching arm as said switching arm is moved by said coin to the second position of the switching arm to permit said switching arm to move into said recess.
Claim 6
Dependent Claim 119 words
A change-making device as defined in claim 4, wherein the switching arm releasing means includes a disc cam mounted on a shaft, said shaft being geared to said driving means so as to revolve once during each dispensing cycle, a lever pivotally connected to said frame, said lever being arranged to be engaged and disengaged by a lobe on said cam as said cam revolves, the engagement and disengagement causing said lever to rock from an initial position and then to return to the initial position, repectively, and means enabling said lever to act on said latch, whereby said rocking of said lever from its initial position moves said latch from said first position to release said switching arm.
Claim 7
Dependent Claim 142 words
A change-making device as defined in claim 5, wherein said holding means further comprises a second latch, said second latch being pivotally attached to said frame and normally resting in a first position, said second latch having a recess arranged to receive and hold said switching arm in its second position when said second latch is moved from its first position to a second position, and wherein said lever engages said second latch and moves it to its second position as said lever is engaged by the lobe of said disc cam, whereby said second latch receives and holds said switching arm in said second positions as said first latch moves from its first position, said second latch being arranged to return to its first position when said lobe disenagaes said lever, whereby said switching arm is released by said second latch.
Claim 8
Dependent Claim 32 words
A change-making device as claimed in claim 1, including holding means adapted to hold said cylinder in said operative position when said motor continues to run after completion of a said cycle.
Claim 9
Dependent Claim 91 words
A change-making device as claimed in claim 7, wherein said motor has an armature which is displaced longitudinally from a first position to a second position when said motor is energized, said cylinder has a lateral projection thereon and said holding means has a member which normally occupies a position underlying said projection as the end of a said cycle, said member being displaceable from said position by said projection when the motor has ceased to run but being held in said position by said armature as the motor is running.
Claim 10
Dependent Claim 48 words
A change-making device as claimed in claim 8, wherein said holding means comprises a rocker arrangement pivotally mounted on said frame and having an upper part aligned with said armature, said member being in the form of a horizontal arm at the lower end of said rocker arrangement.

References Cited (Backward Citations)

US2581502A Cited
US2585718A Cited
US3244185A Cited
US3550742A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1976-07-16 1977-01-15 1977-07-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1980-07-16 1981-01-15 1981-07-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1984-07-16 1985-01-15 1985-07-17 $7700.00 Window Closed / Lapsed

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