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It delivers a repeatable, precise energization of solenoid 30 for improved performance of game It will be appreciated that the present invention can take many forms and embodiments.
The true essence and spirit of this invention are defined in the appended claims, and it is not intended that the embodiment of the invention presented herein should limit the scope thereof. Variations obvious to one skilled in the art will be included within the invention defined by the claims. For example, FIG. Microcomputer can control other functions of game 10 but pertinent lines for control of claw gripping force are illustrated by referring also to FIG.
Connector JP6 connects the output of solenoid driver to solenoid The L works as a transconductance amplifier, supplying an output current directly proportional to an input voltage level.
The operator uses these switches to set the solenoid current. Switch increases it. Switch decreases it.
Only one switch might be used if the set value wraps around. It should be understood that these switches may be part of the player controls or they can be game owner controls used by the game owner when configuring the product. Microcomputer can be programmed, such as is within the skill of those skilled in the art, to perform the operations discussed above. What is claimed is: 1. A crane game comprising:. The game of claim 1 further comprising a housing, a coin or credit mechanism, a claw XYZ positioner, and a main controller.
The game of claim 1 further comprising a chamber in the housing which can contain items to be gripped by the claw. The game of claim 1 wherein the solenoid comprises an electro-magnet and a ferromagnetic shuttle which moves in response to energization of the electro-magnet. The game of claim 1 wherein the solenoid driver comprises a transconductance amplifier which converts a voltage input to a current output.
The game of claim 1 wherein the solenoid driver further comprises a feedback circuit. The game of claim 1 further comprising an input device connected electrically to the solenoid driver and providing the solenoid driver a pre-determined input signal proportional to gripping force for the claw. The game of claim 7 wherein the input signal comprises a voltage. The game of claim 7 wherein the input device comprises a digital to analog converter. The game of claim 7 further comprising a microprocessor connected to the input device.
The game of claim 10 wherein the microprocessor includes a memory for storing a digital value proportional to gripping force of the claw. The game of claim 7 wherein the input device comprises a microprocessor with a pre-programmed input value proportional to claw gripping force. The game of claim 7 wherein the input device comprises a selector having a plurality of selectable positions each having a value proportional to a different claw gripping force.
The game of claim 13 wherein the selector is connected to the microprocessor and the microprocessor is connected to a digital to analog converter. The game of claim 13 wherein the input device comprises a potentiometer which is infinitely variable adjustable over a range of current values.
The game of claim 14 further comprising an analog digital converter connected to the potentiometer for reading the current through the potentiometer and converting it to a digital value.
The game of claim 15 further comprising a microprocessor connected to the analog digital converter. The game of claim 16 wherein the microprocessor includes a control line connected to the solenoid driver for enabling the solenoid driver.
The game of claim 16 wherein the microprocessor includes a control line connected to the solenoid driver for driving the solenoid driver to a maximum. A game apparatus comprising:.
The apparatus of claim 20 further comprising a feedback circuit between the electrical actuator and the actuator driver. The apparatus of claim 20 further comprising a microprocessor connected to a digital to analog converter for producing a voltage signal to the actuator driver which converts the voltage signal to a current.
A method of controlling a solenoid which controls gripping strength of a claw in a crane game machine to avoid problems caused by voltage surges, electrical noise, or voltage loads comprising:.
The method of claim 23 further comprising feeding back actual current level at the solenoid during the gripping period and adjusting the current to the solenoid based on the feedback. The game of claim 25 further comprises a device to monitor electrical energization of the solenoid and use that measurement to control current to the solenoid.
The game of claim 26 wherein the device is a feedback circuit. The game of claim 26 wherein the device is a compensation device which monitors current to the solenoid arid maintains the current substantially constant despite changes in resistance or voltage.
The game of claim 26 wherein the energizing force to the solenoid is variable to provide for a plurality of gripping forces. The game of claim 29 wherein the current is maintained proportional to a selected gripping force. The apparatus of claim 31 further comprising a circuit to monitor current to the actuator to maintain the current to the actuator substantially constant for a desired claw gripping strength.
The apparatus of claim 31 further comprising a feedback circuit in the driver to receive and feedback the current to the actuator and control the current to the actuator. The apparatus of claim 31 wherein the current is adjustable to present a plurality of gripping strengths. The apparatus of claim 34 wherein the current is issued and maintained substantially constant and proportional to a selected gripping strength from the plurality of gripping strengths.
A method of controlling a solenoid which controls gripping strength of a claw in a crane game machine comprising:. The method of claim 36 further comprising monitoring the current to the solenoid.
The method of claim 37 further comprising feeding back the current to the actuator and controlling the current to the actuator. The apparatus of claim 36 wherein the current is adjustable to present a plurality of gripping stengths. The apparatus of claim 39 wherein the current is issued and maintained substantially constant and proportional to a selected gripping strength from the plurality of gripping strength.
A method of controlling gripping strength of a claw in a crane game comprising:. The method of claim 41 further comprising monitoring the current to the solenoid. The method of claim 42 further comprising feeding back the current to the actuator and controlling the current to the actuator. The apparatus of claim 41 wherein the current is adjustable to present a plurality of gripping strengths.
The apparatus of claim 44 wherein the current is issued and maintained substantially constant and proportional to a selected gripping strength from the plurality of gripping strengths.
The method of claim 46 further comprising maintaining the gripping strength by maintaining the electrical current level. The apparatus of claim 46 wherein the step of maintaining comprises monitoring the electrical current level and maintaining it. Follow us. Register Log in. My Profile points. Log out. New Games Most Popular Games. Support for the Flash plugin has moved to the Y8 Browser. Adjust game screen size.
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