Reciprocating decoy movement device
A reciprocating decoy movement device which has a swivel arm mounted on a pivot post extending upwardly from a base plate, and a drive bar rotatably mounted on a drive shaft extending upwardly from the base plate, the drive bar having an upwardly extending drive post slidably fitted in a guide channel disposed on the underside of the swivel arm, such that rotation of the drive bar moves the drive pin through a circle while sliding in the guide channel, thereby causing the swivel arm to move reciprocally from side-to-side.
1. A reciprocating decoy movement device comprising:
a base plate having a top face, a front end, and a back end, a pivot post extending upwardly from the top face at the back end thereof,
a drive shaft extending upwardly from the top face of the base plate,
a swivel arm having a front end and an underside, the swivel arm attached to the pivot post and movable about a pivot axis perpendicular to the base plate formed by said pivot post, the underside of the swivel arm having a linear guide channel extending radially from the pivot axis,
a drive bar having a top side, a proximal end and a distal end, the proximal end having a drive shaft opening, the distal end having a drive post opening, the drive shaft received in the drive shaft opening,
a drive post received in the drive post opening of the drive bar, the drive post extending upwardly from the top side of the drive bar and slidably received in the guide channel of the swivel arm, and
a rod holder attached to the front end of the swivel arm for supporting a decoy,
whereby spinning the drive shaft rotates the drive bar, causing the swivel arm to swivel reciprocally about the pivot axis and causing the drive post to travel in the guide channel, so that a decoy supported by the holder is moved reciprocally from side-to-side.
2. The reciprocating decoy movement device of claim 1 further comprising:
a drive shaft aperture disposed in the front end of the base plate,
the drive shaft freely received in the drive shaft aperture, and
a motor connected to the base plate and operatively connected to the motor such that activation of the motor causes the drive shaft to spin.
3. The reciprocating decoy movement device of claim 1 further comprising:
a support rod attached to the holder for supporting a decoy.
4. The reciprocating decoy movement device of claim 1 further comprising:
the support rod extending forward from the holder so that a decoy supported by the support rod is horizontally spaced forward of the front end of the base plate.
5. The reciprocating decoy movement device of claim 1 further comprising:
the swivel arm having a back end including a first pivot post hole, and
a support block having a second pivot post hole, the support block attached to the underside of the swivel arm so that the post holes of the arm and of the support block are concentrically aligned, the pivot post closely received in the post holes so that the arm and support block are moveable about said pivot axis.
6. The reciprocating decoy movement device of claim 1 further comprising:
the rod holder having a rod aperture, the support rod received in the rod aperture.
7. The reciprocating decoy movement device of claim 1 further comprising:
the swivel arm having a top side, and
the rod holder is attached to the top side of the swivel arm.
8. The reciprocating decoy movement device of claim 1 further comprising:
the support rod including an upper part and a lower part connected to the lower part, the upper part rotationally fixed to the lower part, the lower part attached to and rotationally fixed to the rod holder.
9. The reciprocating decoy movement device of claim 8 further comprising:
each end of the lower part having an axially extending planar surface, the planar surface on each end having the same tangential orientation to the axial dimension of the lower part as the other end.
10. The reciprocating decoy movement device of claim 9 wherein:
the lower part is connected to the upper part by a ferrule, the ferrule having a set screw which when tightened engages the planar surface on one end of the lower part.
11. The reciprocating decoy movement device of claim 10 wherein:
the rod holder includes a set screw which when tightened engages the planar surface on the other end of the lower part.
12. The reciprocating decoy movement device of claim 8 further comprising:
the upper part more flexible than the lower part.
13. The reciprocating decoy movement device of claim 1 further comprising:
a motor operatively connected to the drive shaft such that activation of the motor causes the drive shaft to spin.
14. The reciprocating decoy movement device of claim 1 further comprising:
the guide channel having a lower level and an upper level, the lower level adjacent the underside of the swivel arm, the lower level disposed between said underside and the upper level, the upper level having a width greater than that of the lower level for minimizing drag of the drive post while traveling in the guide channel.
15. A reciprocating decoy movement device comprises:
a base plate having a top face, a front end, and a back end, a pivot post extending upwardly from the top face at the back end thereof, and a drive shaft aperture disposed in the front end,
a drive shaft freely received in the drive shaft aperture and extending upwardly from the top face of the base plate,
a swivel arm having a front end and an underside, the swivel arm attached to the pivot post and movable about a pivot axis perpendicular to the base plate formed by said pivot post, the underside of the swivel arm having a linear guide channel extending radially from the pivot axis,
a drive bar having a top side, a proximal end and a distal end, the proximal end having a drive shaft opening, the distal end having a drive post opening, the drive shaft received in the drive shaft opening,
a drive post received in the drive post opening of the drive bar, the drive post extending upwardly from the top side of the drive bar and slidably received in the guide channel of the swivel arm,
a rod holder attached to the front end of the swivel arm, and
a support rod attached to the holder and extending forward of the front end of the base plate for supporting a decoy, the support rod including are upper part and a lower part, the upper part rotationally fixed to the lower part, the lower part attached to and rotationally fixed to the rod holder,
whereby spinning the drive shaft rotates the drive bar, causing the swivel arm to swivel reciprocally about the pivot axis and causing the drive post to travel in the guide channel, so that a decoy supported by the holder is moved reciprocally from side-to-side.