GB334673A - Improvements in and relating to sound reproducing machines - Google Patents
Improvements in and relating to sound reproducing machinesInfo
- Publication number
- GB334673A GB334673A GB2300829A GB2300829A GB334673A GB 334673 A GB334673 A GB 334673A GB 2300829 A GB2300829 A GB 2300829A GB 2300829 A GB2300829 A GB 2300829A GB 334673 A GB334673 A GB 334673A
- Authority
- GB
- United Kingdom
- Prior art keywords
- arm
- record
- disc
- turntable
- pin
- 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
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
Landscapes
- Holding Or Fastening Of Disk On Rotational Shaft (AREA)
Abstract
334,673. Continuous Gramophones, Ltd.., (Oyston, W. R.). July 26, 1929. Multiple machines; returning sound-box to starting point.-A gramophone with a vertical turntable d is provided with means for positioning a record disc upon the turntable, comprising a centering pin g raised automatically in correct relation to the other stages of the operation of the machine and substantially vertically along a diameter of the record disc until it reaches and engages the central aperture o in the latter, whereupon the pin after moving forwardly through the disc continues its vertical movement until it reaches and engages the central aperture d<1> in the turntable. The records are stored in a magazine b and each record is adapted to be rolled by a transfer arm c into a position in front of the turntable d where it is supported on a pair of pads e, e<1>. The central aperture o, o<1> will then be disposed a distance below the central aperture d<1> in the turntable depending upon the diameter of the record. The pin g is carried by a vertical arm f which is pivoted to a horizontal lever h adapted to be rocked on a pivot h<1> by a cam i on the main shaft j of the machine. The vertical arm f is acted upon by a spring k fixed to the lever, h, and its pivotal movement is regulated by stops f<2>, f<3>. When the disc has rolled into place on the pads e, e<1>, the shaft j causes the pin g to contact with the record disc and to move upwardly, engaging the aperture o in the disc in its movement, and finally engaging the aperture d' in the turntable. In this position, a roller l on the cam i engages a cam m pivoted at f<1> on the horizontal lever h. A spring n is connected between the arm f and cam m, and a balancing spring p may be provided between the lever h and shaft j. The shaft j operates after the playing of a record to lower the arm f and disc. The cam i may be formed on a plate i<1> mounted by a screw and slot connection j<2> on a lever jl on the shaft j. The pin g, which may have a frustoconical end with a rounded point, is held in a socket g<1> by a set-screw g<5> which engages a circumferential groove in the pin. The socket g<1> is pivoted at g<2> between the flanges of the channel-shaped arm f, and its pivotal movement is regulated by set-screws g<3>, g<4>. At the conclusion of playing a record, the tone-arm and sound-box are returned by a spring &c. to a position depending on the size of record next to be played and as determined by a stop adjusted by a spindle r which carries two arms s, s<1>, engaging respectively above and below a rail t fitted with adjustable screws t<1> for determining the exact position of the spindle and stop. A thrust rod v is pivoted to a crank u on the spindle r. The upper end v<1> of the rod v is clear of the incoming edge of a record a of smaller size, but is engaged by the edge of a larger disc a<3> so that its lower end v<2> is rocked to engage the side of the arm f. When the arm f moves upwardly, a projection f<4> thereon engages the end v<2>, and the crank u rotates the spindle r to effect adjustment of the stop for the tone-arm and sound-box. At the conclusion of playing the tone-arm moves back to the position for engaging the outermost groove of a smaller size record. Specification 304,070 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2300829A GB334673A (en) | 1929-07-26 | 1929-07-26 | Improvements in and relating to sound reproducing machines |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2300829A GB334673A (en) | 1929-07-26 | 1929-07-26 | Improvements in and relating to sound reproducing machines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB334673A true GB334673A (en) | 1930-09-11 |
Family
ID=10188605
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2300829A Expired GB334673A (en) | 1929-07-26 | 1929-07-26 | Improvements in and relating to sound reproducing machines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB334673A (en) |
-
1929
- 1929-07-26 GB GB2300829A patent/GB334673A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2371362A (en) | Record changing mechanism for phonographs | |
US2394539A (en) | Phonograph record changer | |
US1377027A (en) | Phonograph | |
US2643129A (en) | Record changing device | |
GB334673A (en) | Improvements in and relating to sound reproducing machines | |
US2031449A (en) | Automatic gramophone | |
GB764490A (en) | Improvements in automatic or magazine gramophone apparatus | |
US2334649A (en) | Phonograph | |
US1673235A (en) | Repeating attachment for phonographs | |
GB459155A (en) | Improvements in and relating to automatic record-changing talking machines | |
GB689765A (en) | Improvements in or relating to talking machines with disc changing devices | |
US3007704A (en) | Phonographic record changers | |
US1342872A (en) | Device for forming grooves in sound-records | |
GB406354A (en) | Improvements in talking machines | |
US3838861A (en) | Disc search unit | |
US2384682A (en) | Automatic record changing apparatus | |
SU60362A1 (en) | Automatic brake for gramophone | |
US2374570A (en) | Phonograph pickup arm control mechanism | |
US406573A (en) | edison | |
GB853991A (en) | Improvements in or relating to gramophone record playing apparatus | |
US1951668A (en) | Phonograph | |
GB778979A (en) | Improvements in devices for placing the pick-up arm needle in the correct initial playing position on a phonograph record | |
US1519695A (en) | Repeating mechanism for phonographs | |
US1401658A (en) | Automatic stop for phonographs | |
GB812532A (en) | A device for positioning and driving records for multiple selection electric record players |