GB120715A - Improvements in Sound Boxes for Sound Recording and Reproducing Machines. - Google Patents

Improvements in Sound Boxes for Sound Recording and Reproducing Machines.

Info

Publication number
GB120715A
GB120715A GB1300918A GB1300918A GB120715A GB 120715 A GB120715 A GB 120715A GB 1300918 A GB1300918 A GB 1300918A GB 1300918 A GB1300918 A GB 1300918A GB 120715 A GB120715 A GB 120715A
Authority
GB
United Kingdom
Prior art keywords
plate
bar
springs
sound
secured
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
GB1300918A
Inventor
Eldridge Reeves Johnson
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB120715A publication Critical patent/GB120715A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B3/00—Recording by mechanical cutting, deforming or pressing, e.g. of grooves or pits; Reproducing by mechanical sensing; Record carriers therefor
    • G11B3/44—Styli, e.g. sapphire, diamond
    • G11B3/46—Constructions or forms ; Dispositions or mountings, e.g. attachment of point to shank

Landscapes

  • Portable Nailing Machines And Staplers (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Toys (AREA)

Abstract

120,715. Johnson, E. R. Nov. 12, 1917, [Convention date]. Tool arms and mountings. -The stylus lever of a gramophone sound-box is kept under tension by means of springs bent or coiled around the pivotal axis and secured to the stylus crossbar and to the fixed case. As shown in Figs. 1 and 4, the cylindrical cross-bar 11 is half cut away at its ends and is grooved to form bearings for knife edges 16 projecting downwardly from a plate 15 secured to the sound-box casing 1. The curved tensioning-springs 21 are each attached at one end of a screw 20 to the crossbar 11 and at the other end are slotted to receive a screw 24 which secures them to the plate 15. The springs 21 are oppositely placed so that the end of one projects forwardly towards the front of the case 1, whilst the other projects towards the back-plate 2. The springs keep the cross-bar 11 pressed on the knife-edges 16. In a modification, shown in Fig. 17, each strip spring 21<1> is coiled into helical form with its extremities extending in opposite radial directions and its centre attached, to the cylindrical cross-bar 30. The extremities are slotted and secured by screws 24 to the plate 15. The cross-bar 30 is pivoted on conically-pointed screws 31 adjustable in lugs 16' on the plate 15.
GB1300918A 1917-11-12 1918-08-10 Improvements in Sound Boxes for Sound Recording and Reproducing Machines. Expired GB120715A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US513096XA 1917-11-12 1917-11-12

Publications (1)

Publication Number Publication Date
GB120715A true GB120715A (en) 1919-03-13

Family

ID=21970489

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1300918A Expired GB120715A (en) 1917-11-12 1918-08-10 Improvements in Sound Boxes for Sound Recording and Reproducing Machines.

Country Status (3)

Country Link
DE (1) DE333547C (en)
FR (1) FR513096A (en)
GB (1) GB120715A (en)

Also Published As

Publication number Publication date
DE333547C (en) 1921-02-28
FR513096A (en) 1921-02-07

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