US1466493A - Gramophone tone arm - Google Patents

Gramophone tone arm Download PDF

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Publication number
US1466493A
US1466493A US593494A US59349422A US1466493A US 1466493 A US1466493 A US 1466493A US 593494 A US593494 A US 593494A US 59349422 A US59349422 A US 59349422A US 1466493 A US1466493 A US 1466493A
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Prior art keywords
tone arm
socket
gramophone
tone
record
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US593494A
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Tootill Sidney
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Individual
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    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/02Arrangements of heads

Definitions

  • This invention relates to gramophones and like talking machines of the portable type, the characteristic feature of which is to provide means for allowing the tone arm to be iowered from its working position. By lowering the said tone arm from the working position, the height of the cabinet in which the instrument is placed can be reduced without impairing the tonal effect of the instrument when in operation.
  • the invention consists in supporting the tone arm, with its accompanying sound box and stylus in a flanged cylindrical socket, the flange of such socket being secured by screws to the motor board.
  • The'cylindrical part of such socket is provided with oppositely disposed angular and horizontal slots or grooves with which the projecting ends of a rod engage, such rod passing through the ball shaped enlarged end of the tone arm, or short studs could be used in place of the said rod.
  • FIG. 1 Figure 2-show View of the tone arm in [tone arm having its larger end portion its lower position in the socket.
  • a designates the motor board of the machine to which is secured the mechanism (not shown) for rotating a turntable, adapted to support a disc record as I is well understood.
  • the tone arm 5 is pivotally secured at its enlarged end in a. flanged socket 0 attached to the motor board a, the
  • said arm having at its outer end a slotted tubular'socket for securing the sound box andstylus of the usual type.
  • The'larger-end of the tone arm 6 1s surrounded by a collar of sphericalcontour externally forming a loose fitin the flanged socket 0.
  • a rod cl passes diametrically through the end 5 of said tone arm'and the collar 5 the grooves on the face of the record by means oi the stylus engaging said grooves thereon in the known manner.
  • the tone arm with its sound box and stylus is lifted up and moved in a'horizontal direction clear of the record and turntable, a suitable soft pad being provided. upon which the stylus can be deposited where it remains until the stylus is again placedupon a new record and the reproduce tion of another record efl'ected.
  • a horizontal supporting board In a soundreproducing machine, a horizontal supporting board, a tubular socket secured in the said board and providedwith slots having horizontal upper portions and downwardly inclined lower portions, and a mounted loosely in the said sleeve andprovided with lateral projections which engage with the said slotsand enable the tone ar to be raised and lowered with relation to the said board. 7 V

Description

Aug. 28, 1923.
S. TOOTILL GRAMOPHONE TONE ARM Filed 001x10 1922 Patented Aug. 23, 1923.
7 trainearner @FFEQE- SIDNEY TOOTILL, OE LOI'ZTDGN, ENGLAND.
GRAIVIOPHONE TONE ABLE.
Application filed. October 10, 1922. Serial No. 593,494.
2" all whom it may concern Be it known that I, SIDNEY ToorILL, subject of the King-of Great Britain, residing at in Tottenham Court Road, London, V. 1, in the county of London, England, have invented certain new and useful Improvements in Gramophone Tone Arms, of which the following is a specification.
This invention relates to gramophones and like talking machines of the portable type, the characteristic feature of which is to provide means for allowing the tone arm to be iowered from its working position. By lowering the said tone arm from the working position, the height of the cabinet in which the instrument is placed can be reduced without impairing the tonal effect of the instrument when in operation.
The invention consists in supporting the tone arm, with its accompanying sound box and stylus in a flanged cylindrical socket, the flange of such socket being secured by screws to the motor board. The'cylindrical part of such socket is provided with oppositely disposed angular and horizontal slots or grooves with which the projecting ends of a rod engage, such rod passing through the ball shaped enlarged end of the tone arm, or short studs could be used in place of the said rod.
To enable this 'inventionto be clearly understood reference is made to the drawings in which 'Figure 1 shows a side elevation of the tone arm in its-elevated or working position in the socket.
Figure 2-show View of the tone arm in [tone arm having its larger end portion its lower position in the socket.
In the drawings a designates the motor board of the machine to which is secured the mechanism (not shown) for rotating a turntable, adapted to support a disc record as I is well understood. 7 The tone arm 5 is pivotally secured at its enlarged end in a. flanged socket 0 attached to the motor board a, the
said arm having at its outer end a slotted tubular'socket for securing the sound box andstylus of the usual type. The'larger-end of the tone arm 6 1s surrounded by a collar of sphericalcontour externally forming a loose fitin the flanged socket 0. A rod cl passes diametrically through the end 5 of said tone arm'and the collar 5 the grooves on the face of the record by means oi the stylus engaging said grooves thereon in the known manner.
In operation when it is desired to change record and place a new record upon the turntable the tone arm with its sound box and stylus is lifted up and moved in a'horizontal direction clear of the record and turntable, a suitable soft pad being provided. upon which the stylus can be deposited where it remains until the stylus is again placedupon a new record and the reproduce tion of another record efl'ected.
The method of carrying my invention into efl ect is capable of variation without departing from the construction shown and described.
In a soundreproducing machine, a horizontal supporting board, a tubular socket secured in the said board and providedwith slots having horizontal upper portions and downwardly inclined lower portions, and a mounted loosely in the said sleeve andprovided with lateral projections which engage with the said slotsand enable the tone ar to be raised and lowered with relation to the said board. 7 V
V In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses; r SIDNEY TOOTILL.
lVitnesses: r j
J. GLovER',
CHAS. J. FALCONER.
US593494A 1922-10-10 1922-10-10 Gramophone tone arm Expired - Lifetime US1466493A (en)

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