Method and training device to assure sportsmen a proper grip with membrane switch
US5439216A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 17, 1994 |
| Grant date | Aug 8, 1995 |
| Priority date | — |
| Expiry date | May 17, 2014 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B2220/56
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The training device assuring a proper grip utilizes a thin sheet wrap sized to wrap around an outside grip surface of a racket handle. A non-domed membrane switch is retained by the thin sheet wrap. A releasable element is utilized to secure the wrap on the racket handle. This releasable element can be a releasable adherent. A portable power source is electrically coupled to an audible alarm, both of which are in turn electrically connected to the switch. When the switch closes, the alarm sounds. Other than a switch, piezoelectric pressure sensors can be utilized. The method includes removably mounting at least one membrane switch with a wrap about a racket handle, mounting a portable power supply in an audible alarm on the racket, electrically connecting together the power supply, alarm and switch, compressibly closing the switch with a proper hand grip over a distance which does not exceed the thickness of the wrap, and audibly announcing the closure of the switch by activation of the alarm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.