IT1212323B - Tennis teaching device attached to handle of racquet - emits electrical or acoustic signals if correct strokes are played using tethered block which runs over contacts on disc - Google Patents
Tennis teaching device attached to handle of racquet - emits electrical or acoustic signals if correct strokes are played using tethered block which runs over contacts on discInfo
- Publication number
- IT1212323B IT1212323B IT1252278A IT1252278A IT1212323B IT 1212323 B IT1212323 B IT 1212323B IT 1252278 A IT1252278 A IT 1252278A IT 1252278 A IT1252278 A IT 1252278A IT 1212323 B IT1212323 B IT 1212323B
- Authority
- IT
- Italy
- Prior art keywords
- disc
- block
- handle
- teaching device
- racquet
- Prior art date
Links
Landscapes
- Golf Clubs (AREA)
Abstract
The tennis teaching device consists of a disc (2) fixed to the handle of the racket (1). The rim of the disc is of triangular cross section and carries a block (3) mounted on rollers so that the block can run around the rim of the disc. A cord (4) has one end attached to the block (3) and its other end attached to a convenient post or fence. When the player makes a stroke with the racket the block (3) runs around the rim of the disc and a spring arm (5) passes over one or more of the contacts (6) projecting from the surface of the disc. These contacts can be arranged to emit an electric signal which switches on a signal lamp or a purely acoustic signal may be emitted. This signal indicates if the player has made the stroke correctly.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT1252278A IT1212323B (en) | 1978-03-20 | 1978-03-20 | Tennis teaching device attached to handle of racquet - emits electrical or acoustic signals if correct strokes are played using tethered block which runs over contacts on disc |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT1252278A IT1212323B (en) | 1978-03-20 | 1978-03-20 | Tennis teaching device attached to handle of racquet - emits electrical or acoustic signals if correct strokes are played using tethered block which runs over contacts on disc |
Publications (2)
Publication Number | Publication Date |
---|---|
IT7812522A0 IT7812522A0 (en) | 1978-03-20 |
IT1212323B true IT1212323B (en) | 1989-11-22 |
Family
ID=11141155
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT1252278A IT1212323B (en) | 1978-03-20 | 1978-03-20 | Tennis teaching device attached to handle of racquet - emits electrical or acoustic signals if correct strokes are played using tethered block which runs over contacts on disc |
Country Status (1)
Country | Link |
---|---|
IT (1) | IT1212323B (en) |
-
1978
- 1978-03-20 IT IT1252278A patent/IT1212323B/en active
Also Published As
Publication number | Publication date |
---|---|
IT7812522A0 (en) | 1978-03-20 |
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