Drive means for effecting pivotal vertical movement of a transducer head into operative position

Claim 2

In record transport apparatus which includes chassis support structure and supply means for supplying record medium to a fixed transducer position and past a drive capstan to a record take-up means, operational control apparatus comprising: control bar means disposed across said support structure adjacent to said fixed transducer position and having pivot arms pivotally secured to said support structure and being vertically arcuately movable about a horizontal pivotal axis and capstan idler means on line 16 after ''''means'''' insert; record transducing means secured on said control bar means; mechanical drive means for effecting vertical arcuate movement of said control bar means including a cam follower mounted on one of said control bar means pivot arms and spaced from the point of pivotal securing, and cam means having an outside diameter and inner diameter which is rotatably supported by said support structure in contact with said cam follower such that contact of said cam follower at the outside diameter of said cam means positions the control bar means and transducer head in operative position at said fixed position, and contact of said cam follower with said cam means at said inner diameter positions said control bar means and transducer means removed from said fixed position; and actuation means for providing rotational input to said cam means, said means being selectively actuable thereby to effect said vertical arcuate movement of said control bar means and transducer means into and out of operative engagement with said record medium at said fixed position to enable a selected mode of operation.

Claim 3

Control apparatus as set forth in claim 1 which is further characterized to include: a capstan idler assembly secured on said control bar means in disposition to urge said record medium against the drive capstan when the control bar means and transducer means are in operative engagement at said fixed position.

Claim 4

Control apparatus as set forth in claim 1 wherein said octuation means for providing rotational input comprises: an electrical source; an electric motor providing rotational output upon being energized by said electric source; and speed converter means receiving said rotational output from said electric motor and providing rotational output of reduced speed for input to said cam means.

Claim 5

Control apparatus as set forth in claim 3 wherein said speed converter means comprises: gear train means receiving said rotational input from said electrical motor and providing output rotation reduced by a ratio of approximately 60:1.

Claim 6

Control apparatus as set forth in claim 3 which is further characterized to include: switch means mounted on said transport support structure and actuated upon movement of said control bar means and transducer head into operative engagement to remove said electrical source from energizing connection with said electric motor.

Claim 7

Control apparatus as set forth in cLaim 3 which is further characterized to include: a capstan idler assembly secured on said control bar means in disposition to urge said record medium against the drive capstan when the control bar means and transducer means are in operative into engagement at said fixed position.

Claim 8

Control apparatus as set forth in claim 3 which is further characterized to include: first switch means having first and second terminals connected to said electric motor which is mounted on said transport support structure and is actuated by said control bar means and transducer head at said position out of operative engagement to alternate connection of said first and second terminals thereof to said electric motor; and second switch means secured to said transport support structure which is selectively actuatable between first and second positions, each of which positions will provide connection from said electrical source to the respective first and second terminals for connection to said electric motor through said first switch means.

Claim 9

Control apparatus as set forth in claim 3 wherein said speed converter means comprises: gear housing structure; a first drive spur gear connected to receive rotational output from said electric motor and disposed rotatable within said gear housing; first large diameter spur gear rotatably retained within said gear housing in mesh with said drive spur gear and having first small diameter spur gear secured for synchronous rotation therewith; second large diameter spur gear rotatably retained within said gear housing in mesh with said drive spur gear and having second small diameter spur gear secured for synchronous rotation therewith; and a third large diameter spur gear rotatably retained within said gear housing in mesh with said second small diameter spur gear, said third large diameter spur gear being connected to an output shaft providing rotational output to said mechanical drive means.

Claim 10

Control apparatus as set forth in claim 3 which is further characterized to include: switch means connected between said electrical source and said electric motor to energize said electric motor, and which is selectively actuatable to connect a short circuit across said electric motor in order to provide dynamic braking.

Claim 11

Control apparatus as set forth in claim 3 which is further characterized to include: first switch means actuated by said control bar means at said position out of operative engagement to alternate connection of normal open and normal closed switch terminals thereof to said electric motor; second switch means selectively actuatable between first, second and third contacts, said first contact connecting the electrical source to said first switch at the normal open terminal, and said second and third contacts connecting said first switch normal open terminal to the return to said electric motor; and third switch means selectively actuatable between fourth, fifth and sixth contacts, said sixth contact connecting the electrical source to said first switch normal closed terminal, and said fourth and fifth contacts connecting said first switch normal closed terminal to the return to said electric motor, said second and third switch means being linked for ganged actuation to enable dynamic braking of said electric motor.

Claim 12

Control apparatus as set forth in claim 3 which is further characterized to include: first switch means mounted on said transport support structure and actuated by movement of said control bar means to said position out of operative engagement, said switch means having normal open and closed contacts with a common contact connected to said electric motor, said first switch means when actuated connecting the normal open contact with said common contact; second switch means selectively operable to connect said electrical source to said normal open contact of said first switch means; and third switch means selectively operable eXclusive to operation of said second switch means to connect said electrical source to the normal closed contact of said first switch means.

Claim 13

Control apparatus as set forth in claim 11 which is further characterized in that: said second switch means and said third switch means are mechanically connected for ganged switching operability.

Claim 14

In record transport apparatus of the type which utilizes cassette-type magnetic tape, a chassis support structure having operatively associated therewith tape supply drive means and tape take-up drive means for coacting with a tape cassette to supply record tape from a supply spool past a fixed transducer position to a drive capstan and then to a cassette tape take-up spool, a transducer and capstan idler control apparatus comprising: an electric power source; control bar means disposed across said support structure in parallel spaced relationship thereto and being vertically arcuately movable about a horizontal pivotal axis, said control bar means having right-angle extended pivot arms pivotally secured to said support structure; record transducing means and capstan idler means secured on said control bar means adjacent to said fixed position; mechanical drive means for effecting vertical arcuate movement of said control bar means including a cam follower mounted on one of said control bar means pivot arms and spaced from the point of pivotal securing, and cam means having an inner and outer diameter and being rotatably supported by said support structure in contact with said cam follower such that contact of the cam follower at the outside diameter of the cam means positions the control bar means and transducer head into the fixed position in operative engagement with said tape, and contact of said cam follower with the cam means at the inner diameter positions said control bar means and transducer head out of the fixed position and disengaged from said tape; and electrical drive means energized by said electric power source for providing rotational input to said mechanical drive means, said electrical drive means being selectively energizable to effect said vertical arcuate movement of said control bar means to position said record transducing means in operative engagement and disengagement with the tape at said fixed transducer position to enable a selective mode of operation.

Claim 15

In record transport apparatus of the type which utilizes cassette-type magnetic tape, a chassis support structure having operatively associated therewith tape supply drive means and tape take-up drive means for coacting with a tape cassette to supply record tape from a supply spool past a fixed transducer position to a drive capstan and then to a cassette tape take-up spool, a transducer and capstan idler control apparatus comprising: an electric power source; control bar means disposed across said support structure in parallel spaced relationship thereto and being vertically arcuately movable about a horizontal pivotal axis, said control bar means having right-angle extended pivot arms pivotally secured to said support structure; record transducing means and capstan idler means secured on said control bar means adjacent to said fixed position; mechanical drive means for effecting vertical arcuate movement of said control bar means including a cam follower mounted on one of said control bar means pivot arms and spaced from the point of pivotal securing, and cam means having an inner and outer diameter and being rotatably supported by said support structure in contact with said cam follower such that contact of the cam follower at the outside diameter of the cam means positions the control bar means and transducer head into the fixed position in operative engagement with said tape, and contact of said cam follower with the cam means at the inner diameter positions said control bar means and transducer head out of the fixed position and disengaged from said tape; and electrical drive means energized by said electric power source for providing rotational input to said mechanical drive means, said electrical drive means being selectively energizable to effect said vertical arcuate movement of said control bar means to position said record transducing means in operative engagement and disengagement with the tape at said fixed transducer position to enable a selective mode of operation.