GB645434A - Improvements in and relating to electric switches operated by gramophone tone arms - Google Patents
Improvements in and relating to electric switches operated by gramophone tone armsInfo
- Publication number
- GB645434A GB645434A GB352848A GB352848A GB645434A GB 645434 A GB645434 A GB 645434A GB 352848 A GB352848 A GB 352848A GB 352848 A GB352848 A GB 352848A GB 645434 A GB645434 A GB 645434A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plate
- tone arm
- cam
- spindle
- gramophone
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
- H01H19/60—Angularly-movable actuating part carrying no contacts
- H01H19/62—Contacts actuated by radial cams
Landscapes
- Switches With Compound Operations (AREA)
Abstract
645,434. Switches held set and freed mechanically. CONRAD ELECTRICAL CO., Ltd., and CORY, S. A. Feb. 6. 1948, No. 3528. [Class 38(v)] [Also in Group XXXVIII] A switch controlling the motor driving a gramophone turntable is mounted beneath the support of, and operated by the gramophone tone arm, and comprises a base 1 to which is pivoted at 11 a C-shaped plate 2 carrying a contact 6. On counterclockwise rotation of the tone arm spindle 13 by movement of the arm beyond the edge of the turntable a cam 14 on the spindle engages a flange 4 on the plate 2 to cause the contact 6 to bridge contacts 10, 10a. The switch is held closed by a tongue 16 on the plate 2 engaging a latch 3 pivoted at 7 and connected by a spring 9 to the plate 2. On clockwise rotation of the spindle 13 a step 14a on the cam 14 engages a flange 3a on the latch 3 and the spring 9 moves the plate 2 to open the circuit. A tongue 15 and slotted holes 12 in the base 1 enable the angular position of the switch relative to the tone arm to be adjusted. In the Provisional Specification the cam 14 is replaced by two pins carried by the tone arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB352848A GB645434A (en) | 1948-02-06 | 1948-02-06 | Improvements in and relating to electric switches operated by gramophone tone arms |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB352848A GB645434A (en) | 1948-02-06 | 1948-02-06 | Improvements in and relating to electric switches operated by gramophone tone arms |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB645434A true GB645434A (en) | 1950-11-01 |
Family
ID=9760028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB352848A Expired GB645434A (en) | 1948-02-06 | 1948-02-06 | Improvements in and relating to electric switches operated by gramophone tone arms |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB645434A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1005284B (en) * | 1952-10-16 | 1957-03-28 | Kurt Schroeder | Device for automatic switching on and off of the drive motor in record devices |
-
1948
- 1948-02-06 GB GB352848A patent/GB645434A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1005284B (en) * | 1952-10-16 | 1957-03-28 | Kurt Schroeder | Device for automatic switching on and off of the drive motor in record devices |
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