US1291985A

US1291985A - Phonograph.

Info

Publication number: US1291985A
Application number: US11103316A
Authority: US
Inventors: Donald Milne Manson
Original assignee: Individual
Current assignee: Individual
Priority date: 1916-07-24
Filing date: 1916-07-24
Publication date: 1919-01-21
Anticipated expiration: 1936-01-21

Description

D. M. MANSON;

PHONOGRAPH. APPLlcAn'oN FILED 1uLY 24.1915.

'Patented 1111.211919 FIGJ D.M. MAA/SON.

DONALD MILNE MANSON, OF HAMILTON, ONTARIO, CANADA.

PHON OGRAPH.

v Specification of Letters Patent.

Patented Jan. 21, 1919.

Application led .Tuly 24, 1916. Serial No. 111,033.

To all whom it may concern:

Be it known that I, DO NALD MHJNE MAN- soN, of the city of Hamilton, in the county of Wentworth, in the Province of Ontario, Canada, have invented certain new and useful Improvements in Phonographs, of which the following is the specification.

My linvention relates to improvements in phonographs and the object of the invention is to devise electrical means whereby after a record has been played, the needle may be carried back to the beginning so that the playing of the record may be repeated, and it consists essentially of an arm secured at one end to the sound box crook, magnetic means for drawing down the opposite end of the arm thereby raising the sound box and needle from the record, means counterbalancing the weight of the sound box during its return or downward movement, a circuit for the magnet, a switch for making and breaking the circuit, a downwardly projectin portion carried by the taper tube, an adjustable stop designed to be turned in position to correspond with the startin point of the record, and a spring connected to the taper tube and to the bracket thereof and adapted to turn the taper tube from the center of the record when the needle is out of contact with the record to the starting position, whereby the taper tube is stopped from further turning by the prof jection thereof engaging with the adjustable stop, the parts being arranged as hereinafter more particularly explained in the following specification.

Figure 1 is a perspective view of a fragmental portion of the top of a phonograph showing a portion 0f my repeating means.

Fig. 2 is a section through the rear por-4 tion of a phonograph box showing my repeatingmeans.

Fig. 3 is an enlarged detail of the junction of the sound box crook and the taper tube showing my attachment thereto.

Fig. 4 is a section through Fig. 3 along the line 'a1-fg.

Fig. 5 is an enlarged detail elevation of my spring attachment for turning the taper tu e from the central portion of the record to the outer edge.

Fig. 6 is a longitudinal section through the counter-balancing lever.

secured in a hole in the In the drawings like letters of reference indicate corresponding parts in each figure.

1 indicates the usualcasing of a phonograph. 2 indicates the taper tube or arm turnably mounted in the usual way in the collar 3. 4 indicates the usual bracket secured to the casing l and supporting the pivot 5 in the tapertube 2 in the usual way. 6 indicates the turntable of the phonograph carrying the record 7. 8 indicates the sound box crook turnably mounted in the ordinary fashion at the extending end of the taper tube 2. 9 indicates the sound box carried by the crook 8. 10 indicates the needle carried by the sound box 9. 11 indicates a pivot secured to the crook 8. 12 indicates a drum turnably mounted on the pivot l1. 13 indicates a projection carried by the crook 8. 14 indicates a projection carried by the drum 12 and adapted to engage with the`projection 13. 15 indicates an arm secured at one end to the drum 12 and having at its other end an eye 16. 17 indicates a'standard secured to the bottom of the casing 1 and having a forked bearing 18 at its'upper extremity. 19 indicates a pivot pin carried in the bearing 18, and extending through the block 20y to form a fulcrum. 20 indicates a, lever arm fulcrumed on the pivot pin 19 and comprising a central metal rod havingan eye 21 at one end, an inner glass tube fitting the rod, an outer glass tube spaced from the inner tube, plugs fitting the outer tube and into which the rod and nner tube extend and a charge of mercury contained between the inner and outer glass tubes. 22 indicates a hole in the frame 1. 23 indicates a flexible c ord secured at one end in the eye 16 of the arm 15, passing through the hole 22 and secured at its other end to the lever arm 20. 24 indicates a battery. 25 indicates a magnet in proximity to the end 20x of the arm 20. 26 indicates a switch for making or breaking a circuit from the battery 24 through the ma et 25. 26X indicates a light spring secure to the eye 21 and to the bottom of the casing 1. 27 indicates a coil spring under slight tension so as to have a tendency to unwind. One end of the spring 27 is secured in a hole 28 in the arm 4 and the other end is taperl tube 2. 29 indicates a projection carried by'the taper -battery 24:

tube 2 slightly out of contact with the frame 1. 30 indicates a stop turnably secured by the pin 31.

Having describedthe principal parts involved, in my invention, l will brieiiy describe the operation of the same.

After the mechanism of the turntable revolving device has been set ready for use the turntable 6 is started in motion. The taper tube 2 is then turned until the `needle 10 comes into contact with the extreme outer edge of the playing portion of the record 7 at the same time turning the stop 30 on its pivot 31 so that it, the stop, .is in contact with the projection 29 when the needle 10 is in the starting position on the record. The stop may be turned on pivot 31 to suit any size of record.

The record is allowed to revolve until the selection is finished and then if it is desired to repeat it, or if at any intermediate point it is desired to start over the switch 26 1s closed, thus closing the circuit through the and energizing the magnet 25. The end 20X of the arm 20 is thus drawn up to the magnet 25 while the opposite end is lowered to incline downward in the opposite direction allowing the mercury flow to that end, drawing down on the cord 23, and pullin down the extending end of the arm 15. '`he pulling down of the extending end of the arm 15 turns the drum 12 on the pivot 11 and the projection 14 on the drum engaging with the projection 13 on the crook 8 turns the crook so that the sound box 9 is raised and the needle 10 is raised from the record. rlfhe spring 27 is very light and its torque has no effect whatever while the needle 10 is on the record 7, but when the needle is raised from the record by the magnetic means above described the taper tube which is delicately mounted in the collar 3 turns readily due to the unwinding tendency of the spring 27 until stopped by the projection 29 on the taper tube coming in contact with the stop 30. As may readily be seen the needle is now in a position directly above the starting point of the record because the stop 30 and the projection 29 were set in engagement for that position and therefore by opening the switch 26 the circuit through the battery 24 is broken and the needle lowers into position for repeating the playing of the record. Such downward movement of the sound box being counterbalanced by the weight of the mercury charge as the lever arm 20 is lifted to the normal inclined'position. The charge then flows to the opposite end of the outer tube. This arrangement allows the needle to descend with a gradual motion preventing any injury to the needle, or to the surface of the record. The spring 26x serves to keep the projection 13 on the crook and the projection 14: on the drum 12 vthe phonograph charge to in engagement with each other very lightly, thus compensating for the weight of the long end of the lever arm and yet permits the usual undulating movement of the needle over the surface of the record (see Figs. l, 3 and 4.) The connection shown whereby the projections 13 and 14 engage permits the sound box 10 being turned over 1n a vertical direction so asy to rest on the tube 2 without turning down the arm 15 below the surface of frame 1.

By attaching a cord to each of the contacts of the switch 26 a person may be permitted to withdraw to some distance from to better'enjoy the music, and at the completion of a selection if it is v desired to have it repeated it is only necessary to complete the circuit, wait a second or two to give time enough for the needle to travel from the center` of the record to the edge and break the circuit, and the selection may be repeated thus as often as desired.

What l claim as my invention is;

1. In a phonograph, the combination with the sound box, sound box crook, and supporting arm,`of a drum carried by the sound box crook, an arm extending from the drum a hollow lever arm containing a charge of counter-balancing fluid, a connector between the drum arm and lever arm and electrical means for raising the lever arm.-

2. In a phonograph, the combination with the sound box, sound box crook, and supporting arm, of a drum carried by the sound box crook, an arm extending from the drum, a lever arm, and a counter balancing means automatically adjustable longitudinally in relation thereto, a connector between the drum arm and lever arm and f electrical means for raising the lever arm.

3. ln a phonograph having a sound box, means for lifting said box out of contact with a record means for returning said box to an initial position when removed from contact with the record, said lifting means comprising an arm connected'to lift the box, means for operating said arm to lift and lower the box at will, said means including a shiftable weight, so arranged that when the arm is operated to lift the box the weight is shifted to a position to exert its maximum counter balancing of the box, and when operated to lower the box the weight is, by the lowering operation, shifted to a position where it exerts less counter-balancing eect, substantially as described.

4c. ln a phonograph having a sound box, means for lifting said box out of contact with a record, means for returning said box to an initial position when removed from contact with the record, said lifting means comprising an arm connected to lift the box, means for operating said arm to lift and lower the box at will, said means including a, rolling shiftableweightso arranged that position where it exerts less counterbalanowhen the arm is operated to lift the box the lng effect, substantlally as described.

t weight is shifted to a position to exert its DONALD MILNE MAN SON.

maximum counter .balancing of the box, and Witnesses: when operated to lower the box the weight GERTRUDE NICHOLSON, is, by-the lowering operation, shifted to a LAURA BoWRoN.