US4817490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Percussion instrument
Assignee: Individual
•
Filing: 1987-11-20
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Granted: 1989-04-04
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Expires: 2007-11-20
Abstract
Abstract A pedal operated cam mechanism for use in a "hi-hat" cymbal instrument. A complete down and up cycle of the pedal causes the cam to oscillate so that a follower rod is attached to one of the cymbals and bearing on the cam is reciprocated a multiple number of times, thereby producing a multiple beat of the cymbals each cycle.
Inventors
- 👤 Brian F. Cahill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:19
CPC Classifications
G; G10; G10D; G10D13/00; G10D13/01; G10D13/06; G10D13/063; G10D13/065
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
309 words
A foot pedal operated hi-hat cymbals musical instrument for producing a double beat with each complete cycle of pedal movement, comprising: a frame having a support stand and an upright tube; a rod slidably extending through said tube; a pair of cymbals, the upper one mounted on said rod, and the lower one mounted on said tube; a cam axle pivotably mounted on and extending horizontally across said stand below said tube and rod; a lobe cam fixed to said cam axle with its cam surface engaging the lower end of said rod, the lobe part of said cam surface when engaging said rod raising said upper cymbal apart from said lower cymbal, and the regular part of said cam surface on each side of said lobe part when engaging said rod dropping said upper cymbal against said lower cymbal; a foot pedal pivotably mounted on said stand with its free end above its pivoted end and disposed below said cam and cam axle; a flexible strap having one end connected to and partially wrapped around said cam axle, and having its other end connected to said free end of said pedal; a lever arm mounted on and extending out from said cam axle; a spring attached to said stand and to the extended end of said lever arm, resiliently urging said free end of said pedal to an undepressed upper position wherein said regular part of said cam surface on one side of said lobe part places the cymbals in closed position, whereby when said free end of said pedal is partially depressed said lobe part of said cam surface places the cymbals in open position, and when said free end of said pedal is fully depressed said regular part of said cam surface on the other side of said lobe part places the cymbals in closed position.
Claim 2
Dependent Claim
309 words
A foot pedal operated hi-hat cymbals musical instrument for producing a double beat with each complete cycle of pedal movement, comprising: a frame having a support stand and an upright tube; a rod slidably extending through said tube; a pair of cymbals, the upper one mounted on said rod, and the lower one mounted on said tube; a cam axle pivotably mounted on and extending horizontally across said stand below said tube and rod; a lobe cam fixed to said cam axle with its cam surface engaging the lower end of said rod, the lobe part of said cam surface when engaging said rod raising said upper cymbal apart from said lower cymbal, and the regular part of said cam surface on each side of said lobe part when engaging said rod dropping said upper cymbal against said lower cymbal; a foot pedal pivotably mounted on said stand with its free end above its pivoted end and disposed below said cam and cam axle; a flexible strap having one end connected to and partially wrapped around said cam axle, and having its other end connected to said free end of said pedal; a lever arm mounted on and extending out from said cam axle; a spring attached to said stand and to the extended end of said lever arm, resiliently urging said free end of said pedal to an undepressed upper position wherein said regular part of said cam surface on one side of said lobe part places the cymbals in closed position, whereby when said free end of said pedal is partially depressed said lobe part of said cam surface places the cymbals in open position, and when said free end of said pedal is fully depressed said regular part of said cam surface on the other side of said lobe part places the cymbals in closed position.
Claim 3
Dependent Claim
197 words
A foot pedal operated hi-hat cymbals musical instrument for producing a double beat with each complete cycle of pedal movement, comprising: a frame having a support stand and an upright tube; a rod slidably extending through said tube; a pair of cymbals, the upper one mounted on said rod, and the lower one mounted on said tube; a cam axle pivotably mounted on and extending horizontally across said stand below said tube and rod; a lobe cam fixed to said cam axle centrally thereof with its cam surface engaging the lower end of said rod; a foot pedal pivotably mounted on said stand with its free end above its pivoted end and disposed below said cam and cam axle; and a linkage means connecting said free end of said pedal to said stand through said cam axle resiliently urging said cam to its starting position and said pedal to its undepressed starting position for controlling said cam and rod to raise and drop said upper cymbal whereby said cymbals are closed together when said pedal is undepressed, are spaced apart when said pedal is partially depressed, and are again closed together when said pedal is fully depressed.
Claim 4
Dependent Claim
197 words
A foot pedal operated hi-hat cymbals musical instrument for producing a double beat with each complete cycle of pedal movement, comprising: a frame having a support stand and an upright tube; a rod slidably extending through said tube; a pair of cymbals, the upper one mounted on said rod, and the lower one mounted on said tube; a cam axle pivotably mounted on and extending horizontally across said stand below said tube and rod; a lobe cam fixed to said cam axle centrally thereof with its cam surface engaging the lower end of said rod; a foot pedal pivotably mounted on said stand with its free end above its pivoted end and disposed below said cam and cam axle; and a linkage means connecting said free end of said pedal to said stand through said cam axle resiliently urging said cam to its starting position and said pedal to its undepressed starting position for controlling said cam and rod to raise and drop said upper cymbal whereby said cymbals are closed together when said pedal is undepressed, are spaced apart when said pedal is partially depressed, and are again closed together when said pedal is fully depressed.
Claim 5
Dependent Claim
32 words
The instrument set forth in claim 2 wherein said linkage means includes: strap means connected to and wrapped on said cam axle; and resilient means connecting said cam axle and said frame.
Claim 6
Dependent Claim
29 words
The instrument set forth in claim 3 wherein said resilient means includes a lever extending out from said cam axle and a spring connecting said lever to said frame.
References Cited (Backward Citations)
US3618441A
Cited
US4262576A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-03 | 1992-10-03 | 1993-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-03 | 1996-10-03 | 1997-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-03 | 2000-10-03 | 2001-04-04 | $7700.00 | Window Closed / Lapsed |