1. A mining machine comprising:
a cutting drum with a plurality of bits mounted on the drum;
a cutting drum turning mechanism including
a power source,
a cutter motor,
a switch, and
a variable frequency drive,
wherein the switch has a first and a second state, the first state electrically coupling the power source and the cutter motor to operate the cutting drum at a cutting speed and the second state electrically coupling the variable frequency drive and the cutter motor to operate the cutting drum at a maintenance speed less than the cutting speed.
2. The mining machine of claim 1, wherein in the second state, the power source is electrically coupled to the variable frequency drive.
3. The mining machine of claim 2, wherein the power source provides alternating current.
4. The mining machine of claim 1, further comprising a secondary power source electrically coupled to the variable frequency drive.
5. The mining machine of claim 4, wherein the secondary power source provides alternating current.
6. The mining machine of claim 1, wherein when the switch is in the second state, the cutter motor is electrically decoupled from the power source.
7. The mining machine of claim 1, wherein the variable frequency drive includes a braking feature configured to stop the cutting drum at a user-specified position.
8. The mining machine of claim 1, wherein the switch includes a double throw switch.
9. The mining machine of claim 1, wherein the maintenance speed is approximately 3 rotations per minutes.
10. The mining machine of claim 1, further comprising a controller configured to receive input signals from an operator and transmit control signals to the cutting drum turning mechanism based on the input signals.
11. The mining machine of claim 10, wherein the controller is configured to receive the input signals from a remote control operated by the operator.
12. The mining machine of claim 10, wherein the control signals include a first signal to change the switch from the first state to the second state.
13. The mining machine of claim 12, wherein the control signals include a second signal to stop movement of the cutting drum when the cutting drum is being operated at the maintenance speed.
14. The mining machine of claim 12, wherein the controls signals include a second signal to change the switch from the second state to the first state.
15. The mining machine of claim 10, wherein the control signals include a first signal to change the switch from the first state to the second state and move the cutting drum a predetermined amount.
16. The mining machine of claim 15, wherein the predetermined amount is approximately \xbc of a rotation of the cutting drum.
17. The mining machine of claim 15, wherein the predetermined amount is approximately \u2153 of a rotation of the cutting drum.
18. The mining machine of claim 1, wherein the variable frequency drive is deactivated when the switch is in the first state.
19. A cutting drum turning mechanism comprising:
a power source,
a cutter motor,
a switch, and
a variable frequency drive,
wherein the switch has a first and a second state, the first state electrically decoupling the cutter motor and the variable frequency drive to operate the cutting drum at a cutting speed and the second state electrically coupling the variable frequency drive and the cutter motor to operate a cutting drum included in a mining machine at a maintenance speed less than the cutting speed.
20. Non-transitory computer-readable medium including executable instructions for moving a cutting drum of a mining machine at a maintenance speed, the medium comprising instructions for:
receiving, at a controller, input signals from an operator interface, the input signals including a signal to initiate turning of the cutting drum at the maintenance speed; and
transmitting, in response to the input signals, control signals from the controller to a cutting drum turning mechanism including the mining machine, the control signals instructing a switch included in the cutting drum turning mechanism to electrically couple a cutter motor and a variable frequency drive.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A fishing lure comprising:
a rotatable lure body having an exterior surface, wherein the exterior surface includes one or more spaced helical grooves configured to effect rotation of the rotatable lure body during retrieval through water; and
a hook coupled to the rotatable lure body, wherein the rotatable lure is configured to rotate independently of the hook;
wherein the fishing lure is a topwater fishing lure.
2. The fishing lure of claim 1, wherein the rotatable lure body is elongated in shape.
3. The fishing lure of claim 1, wherein the rotatable lure body is buoyant such that the fishing lure is configured to float on surface when the fishing lure is at rest in still water.
4. The fishing lure of claim 1, wherein helical surfaces are disposed between the spaced helical grooves, and wherein the spaced helical grooves and helical surfaces extend at least 80% of the length of the rotatable lure body.
5. The fishing lure of claim 4, wherein the spaced helical grooves have a width that is at least twice a width of the helical surfaces.
6. The fishing lure of claim 4, wherein the helical surfaces and the helical grooves have contrasting colors andor designs.
7. The fishing lure of claim 1, further comprising a wire, wherein the wire is at least partially disposed in a longitudinal channel extending through the rotatable lure body, such that the rotatable lure body rotates about the wire.
8. The fishing lure of claim 7, wherein the wire comprise a forward ring.
9. The fishing lure of claim 7, wherein a distal end of the wire comprises a swivel coupled to the hook.
10. The fishing lure of claim 1, wherein the fishing lure comprises wings disposed at a distal end of the rotatable lure body.
11. The fishing lure of claim 1, wherein the hook comprises a treble hook.
12. The fishing lure of claim 1, wherein the rotatable lure body comprises a ring at a proximal end and another ring at a distal end.
13. The fishing lure of claim 1, wherein the rotatable lure body comprises a lure core and removable sleeve configured for placement of the lure core, wherein the removable sleeve has the exterior surface with the one or more spaced helical grooves.
14. The fishing lure of claim 1, wherein the rotatable lure body comprises a body portion and a head portion, wherein the head portion is threadedly coupled to the body portion.
15. The fishing lure of claim 1, wherein the hook comprises a skirt.
16. A topwater fishing lure comprising:
a rotatable lure body having an exterior surface, wherein the exterior surface includes one or more spaced helical grooves configured to effect rotation of the rotatable lure body during retrieval through water;
a wire at least partially disposed in a longitudinal channel extending through the rotatable lure body, such that the rotatable lure body rotates about the wire, the wire comprising a forward ring at a proximal end of the wire;
a swivel coupled to a distal end of the wire;
a hook coupled to the swivel such that the rotatable lure body is configured to rotate independently of the hook; and
wings disposed between the rotatable lure body and the swivel;
wherein the rotatable lure body is buoyant such that the fishing lure is configured to float on surface when the fishing lure is at rest in still water.
17. The topwater fishing lure of claim 16, wherein the hook comprises a skirt.
18. The topwater fishing lure of claim 16, wherein helical surfaces are disposed between the spaced helical grooves, and wherein the spaced helical grooves and helical surfaces extend at least 80% of the length of the rotatable lure body.
19. The topwater fishing lure of claim 18, wherein the spaced helical grooves have a width that is at least twice a width of the helical surfaces.
20. The topwater fishing lure of claim 16, wherein the rotatable lure body comprises a lure core and removable sleeve configured for placement of the lure core, wherein the removable sleeve has the exterior surface with the one or more spaced helical grooves.