GB418890A - Improvements in or relating to gramophones - Google Patents
Improvements in or relating to gramophonesInfo
- Publication number
- GB418890A GB418890A GB763434A GB763434A GB418890A GB 418890 A GB418890 A GB 418890A GB 763434 A GB763434 A GB 763434A GB 763434 A GB763434 A GB 763434A GB 418890 A GB418890 A GB 418890A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lever
- cam
- fixed
- pin
- movement
- 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
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/20—Driving; Starting; Stopping; Control thereof
- G11B19/26—Speed-changing arrangements; Reversing arrangements; Drive-transfer means therefor
- G11B19/265—Friction wheel drive
Landscapes
- Transmission Devices (AREA)
Abstract
418,890. Gramophones. VORWERCK, W., 6, Elisabethstrasse, Kothen-Anhalt, Germany. March 10, 1934, No. 7634. [Class 40 (ii).] A mechanism for giving constant tracking- speed comprises a lever 4 linked at 3 to a collar 2 on the tone-arm 1, and slotted at 5 so as to be guided by a fixed pin 6, during movement of the tone-arm. The free end 17 of the lever 4 engages a fixed but adjustable cam 18, whereby a predetermined angular movement of the lever about the pin 6 is effected, this angular movement being utilized to actuate a tappet 8 guided in a fixed slot 9 to control a brake-pad on the governor gear. A spring 7 fixed at one end and attached to the lever 4 at the other end, applies a varying moment about the pin 6 to relieve side pressure of the needle on the record grooves, occasioned by the reactions of the cam. The constant tracking-speed mechanism may be rendered inoperative by a cranked lever 12, pivoted at 11 and linked at 13 to the plate 14 carrying the cam 18, movement of this lever in a clockwise direction causing the cam 18 to be withdrawn from the lever 4, and causing a cam at the end of the part 10 of the lever 12 to position the tappet 8 to give the required constant speed of revolution of the turntable.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB763434A GB418890A (en) | 1934-03-10 | 1934-03-10 | Improvements in or relating to gramophones |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB763434A GB418890A (en) | 1934-03-10 | 1934-03-10 | Improvements in or relating to gramophones |
Publications (1)
Publication Number | Publication Date |
---|---|
GB418890A true GB418890A (en) | 1934-11-01 |
Family
ID=9836866
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB763434A Expired GB418890A (en) | 1934-03-10 | 1934-03-10 | Improvements in or relating to gramophones |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB418890A (en) |
-
1934
- 1934-03-10 GB GB763434A patent/GB418890A/en not_active Expired
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