Patent US3788647A successfully refreshed from Google Patents.
US3788647A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swing measurement system
Assignee: ATHLETIC SWING MEASUREMENT
•
Filing: 1971-12-06
•
Granted: 1974-01-29
•
Expires: 1991-12-06
Abstract
Abstract A swing measurement system for measuring characteristics of the swing of an athlete''s arm, bat, club or for orthopedic and medical measurements of the movement of an individual''s limbs. A transmitter is utilized for transmitting predetermined frequency to a passive repeater circuit where the received frequency is modulated with signals generated by sensors such as an accelerometer or strain gauge and the modulated frequency retransmitted by the passive repeater to a receiver where it can be displayed for comparison and analysis.
Inventors
- 👤 J Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:43
CPC Classifications
A; A63; A63B; A63B24/00; A61; A61B; A61B5/00; A61B5/0002; A61B5/22; G; G01; G01P; G01P1/00; G01P1/07; Y; Y10; Y10S; Y10S128/00; Y10S128/903
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
142 words
A measuring system comprising in combination: a. transmitting means for transmitting a predetermined frequency; b. an athletic swing member; c. passive repeater means attached to said athletic swing member for receiving said transmitted frequency and retransmission thereof; d. a plurality of sensors attached to said athletic swing member and coupled to said passive repeater means for generating electrical signals analagous to conditions of said athletic swing member, said sensors being adapted to modulate said passive repeater means frequency being received from said transmitter means prior to retransmission thereof; e. receiver means for receiving modulated frequency being retransmitted from said passive receiver and converting and displaying said data whereby predetermined conditions of an athletic swing can be measured; and f. an antenna utilizing said athletic swing member having a center metallic member surrounded by a second metallic member for creating a coaxial antenna.
Claim 2
Dependent Claim
142 words
A measuring system comprising in combination: a. transmitting means for transmitting a predetermined frequency; b. an athletic swing member; c. passive repeater means attached to said athletic swing member for receiving said transmitted frequency and retransmission thereof; d. a plurality of sensors attached to said athletic swing member and coupled to said passive repeater means for generating electrical signals analagous to conditions of said athletic swing member, said sensors being adapted to modulate said passive repeater means frequency being received from said transmitter means prior to retransmission thereof; e. receiver means for receiving modulated frequency being retransmitted from said passive receiver and converting and displaying said data whereby predetermined conditions of an athletic swing can be measured; and f. an antenna utilizing said athletic swing member having a center metallic member surrounded by a second metallic member for creating a coaxial antenna.
Claim 3
Dependent Claim
50 words
The measuring system in accordance with claim 1 in which said passive repeater means includes a single oscillator circuit and said plurality of sensors are connected to a multiplexor circuit which is in turn coupled to said oscillator circuit for transmitting a plurality of sensed measurements over a single frequency.
Claim 4
Dependent Claim
33 words
The apparatus in accordance with claim 1 in which said passive repeater circuit includes three oscillators coupled to three sensors for transmitting said measured data over slightly different frequencies back to the receiver.
Claim 5
Dependent Claim
17 words
The apparatus in accordance with claim 3 in which each said oscillator is a crystal controlled oscillator.
Claim 6
Dependent Claim
23 words
The apparatus in accordance with claim 3 in which said receiver means includes three receivers for receiving the data from three separate sensors.
Claim 7
Dependent Claim
20 words
The apparatus in accordance with claim 1 in which said sensors include at least one accelerometer and one strain gauge.
Claim 8
Dependent Claim
29 words
The apparatus in accordance with claim 1, in which the center metallic member is a golf club handle having insulation wrapped therearound and then surrounded with an aluminum covering.
Claim 9
Dependent Claim
35 words
The apparatus in accordance with claim 1 including a remotely located display unit having a transmitting means and receiving means therein, along with a display means for displaying the data received on a display panel.
Claim 10
Dependent Claim
17 words
The apparatus in accordance with claim 8 in which the display panel is a cathode ray tube.
References Cited (Backward Citations)
US2927995A
Cited
US3072899A
Cited
US3253588A
Cited
US3270564A
Cited
US3371345A
Cited
US3579235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |