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EDISON PHONOGRAPH MONTHLY.
NEW STYLE REPEATING ATTACHMENT.
The accompanying cut shows our new style Repeating Attachment applied to the Triumph Phonograph, and illustrates equally well its application to the larger spring motor and electric machines. On the Home Phonograph a slight variation in construction is made, which will be spoken of further on.
The operation of the device is very simple and will be readily understood from the cut and what follows, since we know that to accomplish the result sought it is only necessary to lift the speaker arm at the end of Record and at the same time engage it with some returning means. This returning means is a deep grooved screw S, supported in bearings at the back of the machine body and driven
inner end of L, tending to pull it down, thus bringing the pin down on top of straight edge and lifting the speaker arm; at the outer end of the lever L a latch G is pivoted, so that when L is pushed down, allowing the speaker arm to drop, the feed nut to engage the feed screw and the arm to ride on straight edge as usual, this latch hooks under the edge of plate C, retaining it in that position, the spring tending to pull it in the opposite direction.
To automatically release this latch G at the end of the record, there is an adjustable stop H, mounted on the right hand end of the machine body and as the speaker arrn, advances to the right the latch L comes against this stop and the arm continues until it has unhooked the latch, at which instant the spring draws
by means of sprockets E-E and chain F, running from the main shaft to it. To engage the speaker arm with this screw there is a plate B rigidly fastened to back of arm and projecting out over the return screw. The projecting end of this plate carries a pin P on its under side, of the right diameter and proper position to enter the groove in the return screw when the speaker arm has been lifted sufficiently to disengage the feed nut from the feed screw.
To lift the speaker arm at the close of the record, a plate C is firmly screwed to the forward projection of speaker arm and carries on its inner side a pivoted lever L, which in turn carries on its inner end, a pin J, which projects back over the top of straight edge and serves as lift lever. A spring is also attached to the
the lever down, thus lifting the speaker arm, which disengages feed nut and screw and brings the pin P into slot of the return screw S,. which carries the speaker arm back to the left.
The cut shows it returning. On its way back, the post O engages a swinging pawl K on lever L and resets it, locking the latch L under plate C, leaving the speaker arm free to drop back on the straight edge as soon as foot N of plate C, now riding on top of plate A, drops off at the extreme left of its travel, thus completing one entire operation, which will be automatically duplicated as long as the machine runs.
One great advantage of this attachment is that when the machine is reproducing there is