GB144203A - Improvements in or relating to gramophones and the like - Google Patents

Improvements in or relating to gramophones and the like

Info

Publication number
GB144203A
GB144203A GB3105619A GB3105619A GB144203A GB 144203 A GB144203 A GB 144203A GB 3105619 A GB3105619 A GB 3105619A GB 3105619 A GB3105619 A GB 3105619A GB 144203 A GB144203 A GB 144203A
Authority
GB
United Kingdom
Prior art keywords
sound
arm
box
magnet
tone
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3105619A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ARTHUR FREDERICK RICHMOND COTT
SIDNEY HOWARD COTTON
Original Assignee
ARTHUR FREDERICK RICHMOND COTT
SIDNEY HOWARD COTTON
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ARTHUR FREDERICK RICHMOND COTT, SIDNEY HOWARD COTTON filed Critical ARTHUR FREDERICK RICHMOND COTT
Priority to GB3105619A priority Critical patent/GB144203A/en
Publication of GB144203A publication Critical patent/GB144203A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G11B3/08Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers
    • G11B3/095Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers for repeating a part of the record; for beginning or stopping at a desired point of the record
    • G11B3/0952Raising, lowering, traversing otherwise than for transducing, arresting, or holding-up heads against record carriers for repeating a part of the record; for beginning or stopping at a desired point of the record using automatic means

Landscapes

  • Toys (AREA)

Abstract

144,203. Cotton, A. F. R., and Cotton, S. H. Dec. 11, 1919. Sound-boxes, raising, positioning, and lowering; returning sound-box to starting-point.-Electrical apparatus for automatically raising the sound-box and returning the tone-arm to enable records to be repeated comprises two switch members adjustably supported on an horizontal bar so as to be operated by the tone-arm at each end of its travel, the switch at the finishing point being combined with a hold-on electro-magnet, so that the magnet for lifting the sound-box is maintained energized, whilst the tone-arm is returned by a spring or weight. Bells, buzzers, or the like may be sounded during the return movement of the tone-arm. The machine may be arrested by sliding one of the switches into such a position that the sound-box needle falls clear of the record on to a brake-lever. A bar e<1> arranged axially of and beneath the tone-arm e moves between two stops f, g adjustable along a bar d and held frictionally in position by springs. The stop f carries a switch arm f<1> which is arranged to open a battery circuit against the action of a spring when the bar e strikes a pin f<2>. The stop g carries a switch arm g<1> which is arranged to close the battery circuit against the action of a spring when the bar e<1> strikes a pin g<2>. The battery circuit includes in series the switch f<1>, bar d, switch g<2>, hold-on magnet i, and an electro-magnet l for raising the sound-box. During the playing of a record, the circuit is open at the contact g<1>. When the tonearm reaches the desired point for repetition, the switch g<1> is closed by the arm e<1> and is held closed by the magnet i, and the sound-box is raised by the magnet l. The tone-arm is then returned to the starting position by a spring, a weight n, or other means. When the bar e<1> strikes the pin f<2>, the circuit is opened, and the sound-box descends on to the record for another reproduction, cushioning being effected by the residual magnetism of the magnet l or by a dash-pot. The magnet l for raising the sound-box preferably has a centre pole l' and two lateral pole-pieces l<2>, and is carried, on an arm m pivoted at m<1> to a bracket e<2> clamped on the tone-arm e. An armature k<2> is secured to the sound-box rim, and the gap is adjustable by a screw m<3>. Alternatively, the magnet l may be mounted on a bracket on the tone-arm socket, and its armature may be connected to the sound-box by a cord or lever. During the interval in which the sound-box is elevated, bells or buzzers may be sounded in time with the record music. For this purpose, an electrical buzzer q<1> may be connected in circuit with a battery B<1> and a commutator r on a shaft of the spring motor t. The circuit also includes a switch controlled by the circuit of the magnet l, or by the raising of the. sound-box. A succession of bells, buzzers, or other instruments may be similarly operated. The commutator r may be rotated by an electric or other motor, and its speed may be adjusted preferably by a rheostat connected to the governor of the spring motor t. When it is desired to stop the machine, the adjustable stop f is moved out. wards so as to allow the tone-arm, in its return movement, to pass beyond the turntable rim. When the stop is engaged, the sound-box falls until the needle rests on a rubber pad on one end of a lever, the other end of which applies a brake to the turntable rim.
GB3105619A 1919-12-11 1919-12-11 Improvements in or relating to gramophones and the like Expired GB144203A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3105619A GB144203A (en) 1919-12-11 1919-12-11 Improvements in or relating to gramophones and the like

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3105619A GB144203A (en) 1919-12-11 1919-12-11 Improvements in or relating to gramophones and the like

Publications (1)

Publication Number Publication Date
GB144203A true GB144203A (en) 1920-06-10

Family

ID=10317296

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3105619A Expired GB144203A (en) 1919-12-11 1919-12-11 Improvements in or relating to gramophones and the like

Country Status (1)

Country Link
GB (1) GB144203A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426241A (en) * 1943-02-11 1947-08-26 Columbia Recording Corp Phonograph recording and reproducing system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2426241A (en) * 1943-02-11 1947-08-26 Columbia Recording Corp Phonograph recording and reproducing system

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