GB858300A - Phonograph motor change-speed device - Google Patents
Phonograph motor change-speed deviceInfo
- Publication number
- GB858300A GB858300A GB1225458A GB1225458A GB858300A GB 858300 A GB858300 A GB 858300A GB 1225458 A GB1225458 A GB 1225458A GB 1225458 A GB1225458 A GB 1225458A GB 858300 A GB858300 A GB 858300A
- Authority
- GB
- United Kingdom
- Prior art keywords
- idler wheel
- spindle
- motor
- engage
- cam
- 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)
- Gear Transmission (AREA)
Abstract
858,300. Change-speed friction gear. V-M CORPORATION. April 17, 1958, No. 12254/58. Class 80 (2). The rim of a gramophone turntable (not shown) is engaged by the smaller diameter portion 30 of an idler wheel 26 whose larger diameter portion 28 is engaged by various steps A ... D on a motor spindle 24, a parallel link arrangement 12, 16 carrying the motor 20 so that on turning a control spindle 86, a bar 64 is slidden axially and a cam pin 84 carried thereby slides along an inclined cam slot A 1 ... D 1 in a plate 74, 76 fast with the motor, which is accordingly raised or lowered to engage a different step on the motor spindle 24 with the idler wheel to produce a change in velocity ratio, the idler wheel 26 being disengaged from the driving spindle 24 during the ratio shift. The idler wheel 26 rotates on a bracket 36 connected by a pivot pin 38 to an arm 42 in turn connected by a pivot pin 40 to a mounting frame 10, and is biased to engage the motor spindle 24 and the turntable rim by a spring 52. The slide bar 64 is formed with a cam surface A 2 ... D 2 engaged by a follower 72 on a lever 54 tiltable about a pin 56 and engaging at one end 58 with an arm 48 on the idler support bracket 36. The lever 54 is biased by a compression spring 60 to engage the cam follower 72 with the cam surfaces A 2 ... D 2 . When the bar 64, which is guided on the support frame 10 by a pin 66 sliding in a slot 68, is slidden by turning the control spindle 86, the cam surface A 2 ... D 2 on the bar rotates the lever 54 back and forth so that its end 58 acts upon the arm 48 of the idler support bracket 36 which is thereby turned against the bias of its spring 52 to move the idler wheel 26 out of engagement with the motor spindle 24 and then re-engage it therewith, the concomitant vertical movement of the motor spindle 24 from engagement of one step with the idler wheel 26 to engagement of the next step therewith taking place when the idler wheel is in its disengaged position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1225458A GB858300A (en) | 1958-04-17 | 1958-04-17 | Phonograph motor change-speed device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1225458A GB858300A (en) | 1958-04-17 | 1958-04-17 | Phonograph motor change-speed device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB858300A true GB858300A (en) | 1961-01-11 |
Family
ID=10001188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1225458A Expired GB858300A (en) | 1958-04-17 | 1958-04-17 | Phonograph motor change-speed device |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB858300A (en) |
-
1958
- 1958-04-17 GB GB1225458A patent/GB858300A/en not_active Expired
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