Automatic stop apparatus for tape recorder

Claim 2

A tape recorder and automatic stop means which comprises in combination a set of reels to which tape ends are secured and between which tape is driven, a sub-chassie having heads disposed to move toward tape passage and away from tape passage, the subchassie being spring biased away from tape passage, a first Lshaped arm having a first supporting point on the sub-chassie at the arm joinder and a sensing lever provided at an end thereof, a second arm having a second supporting point at a fixed position on a frame and pivotally connected to said first arm at an end opposite the sensing lever, means for locking the position of the sub-classis when said sub-chassis is moved so that said head is urged against the tape and the connecting point of said first and second arms comes on the straight line connecting said first and second supporting points, a set of spaced guide posts on the side opposite to said heads along the tape passage, said sensing lever of said first arm being pressure engaged with the tape portion stretching between said guide posts, said first and second arms being displaced by the sensing lever pushing force accompanied by increase of the tape tension at the terminal end of the tape, said sub-chassis being moved away from the tape passage and simultaneously therewith the mechanism interlocked with said subchassis being mechanically stopped.

Claim 3

A tape recorder and automatic stop means which comprises in combination a set of reels to which tape ends are secured and between which tape is driven, a sub-chassie having heads disposed to move toward tape passage and away from tape passage, the sub-chassie being spring biased away from tape passage, a first L-shaped arm having a first supporting point on the sub-chassie at the arm joinder and a sensing lever provided at an end thereof, a second arm having a second supporting point at a fixed position on a frame and pivotally connected to said first arm at an end opposite the sensing lever, means for locking the position of the sub-classis when said sub-chassis is moved so that said head is urged against the tape and the connecting point of said first and second arms comes on the straight line connecting said first and second supporting points, a set of spaced guide posts on the side opposite to said heads along the tape passage, said sensing lever of said first arm being pressure engaged with the tape portion stretching between said guide posts, said first and second arms being displaced by the sensing lever pushing force accompanied by increase of the tape tension at the terminal end of the tape, said sub-chassis being moved away from the tape passage and simultaneously therewith the mechanism interlocked with said sub-chassis being mechanically stopped.

Claim 4

A tape recorder and automatic stop means which comprises in combination a set of reels to which tape ends are secured and between which tape is driven, a sub-chassie having heads disposed to move toward tape passage and away from tape passage, the sub-chassie being spring biased away from tape passage, a first L-shaped arm having a first supporting point on the sub-chassie at the arm joinder and a sensing lever provided at an end thereof, a second arm having a second supporting point at a fixed position on a frame and pivotally connected to said first arm at an end opposite the sensing lever, means for locking the position of the sub-classis when said sub-chassis is moved so that said head is urged against the tape and the connecting point of said first and second arms comes on the straight line connecting said first and second supporting points, a set of spaced guide posts on the side opposite to said heads along the tape passage, said sensing lever of said first arm being pressure engaged with the tape portion stretching between said guide posts, said first and second arms being displaced by the sensing lever pushing force accompanied by increase of the tape tension at the terminal end of the tape, said sub-chassis being moved away from the tape passage and simultaneously therewith the mechanism interlocked with said sub-chassis being mechanically stopped.

Claim 5

An automatic stop apparatus for a tape recorder according to claim 1, wherein: a stopper for determining the lock position of the arms is provided in the neighborhood of the connecting point of said first and second arms, an elastic member is provided for exerting a displacing force on one of said arms to bring the connecting point of the both arms into abutment with said stopper.

Claim 6

An automatic stop apparatus for a tape recorder according to claim 2, wherein: a stopper for determining the lock position of the arms is attached slidably in the direction to unlock the arms, a stop button is interlocked with the stopper to manually unlock the arms.

Claim 7

An automatic stop apparatus for a tape recorder according to claim 2, wherein: the initial position of said stopper is determined with a predetermined distance Shifted from the straight line connecting said first and second supporting points in the direction of the displacement of the connecting point.

Claim 8

An automatic stop apparatus for a tape recorder according to claim 1, wherein: said lock means is provided with a slider sliding in relation to the push button, said slider is engaged at an end with a movable contact of a normally open switch connected to a source of power for closing said switch when said lock means is operated and opening said switch when said lock means is released.