Angle adjusting device

• US 4,614,452 A
• Filed: 02/28/1984
• Issued: 09/30/1986
• Est. Priority Date: 02/28/1984
• Status: Expired due to Fees

• Current Assignee: Cheng H. Wang
• Original Assignee: Cheng H. Wang
• Inventors: Wang, Cheng H.
• Primary Examiner(s): Kundrat, Andrew V.
• Application Number:
  US06/584,444
• Time in Patent Office: 945 Days
• Field of Search: 403/97, 403/27, 403/146
• US Class Current: 403/27
• CPC Class Codes: F16B 7/04 Clamping or clipping connections friction-grip releasable fastenings in general F16B2/00
• CPC Class Codes: F16C 11/10 Arrangements for locking
• CPC Class Codes: F16M 11/2014 around a vertical axis F16M11/2035 takes precedence
• CPC Class Codes: F16M 11/2021 around a horizontal axis F16M11/2035 takes precedence
• CPC Class Codes: F16M 2200/024 by positive interaction, e.g. male-female connections
• CPC Class Codes: G01B 3/002 Details
• CPC Class Codes: G10G 5/00 Supports for musical instruments cellopins or components therefor G10D3/01
• CPC Class Codes: Y10T 403/20 with indicator or inspection means
• CPC Class Codes: Y10T 403/32368 including radial interengaging tongue and slot or serrations
• CPC Class Codes: Y10T 403/32827 Interposed spring means coaxial with pivot

Abstract

An angle adjusting device for adjusting the relative positions of musical instruments, such as a bass drum and jazz tomtom. The angle adjusting device has two rods for holding the musical instruments separately. Each rod has a head which includes an annular inclined toothed portion. A wing nut mounted on one end of the axle and a lever having a cam surface for abutting against the wall of either one of the heads, through which full engagement, partial engagement and disengagement can be accurately set. Thus, rotation of one head relative to the other to adjust the angle of two rod can be implemented simply by singlehanded actuation of the lever.

Claims

1. An angle adjusting device comprising:

a first rod having a first head, said first head having a first annular toothed portion, and a first through hole coaxial with said first annular toothed portion;

a second rod having a second head, said second head having a second annular toothed portion for meshing said first annular toothed portion, and a second through hole coaxial with said second annular toothed portion;

a first spring member disposed between said first head and said second head for biasing said second annular toothed portion from said first annular toothed portion;

an axle having a first end and a second end;

a fastening member mounted on said first end of said axle to hinder said first head from slipping off said axle;

a lever pivoted with said second end including a cam surface abutting said second head for varying the axial position of said axle relative to said second head, whereby through cooperation with said fastening member, a variation of the relative position of said axle to said second head will drive said second annular toothed portion to engage or disengage said first annular toothed portion, wherein the teeth of said first annular toothed portion and said second annular toothed portion are inclined in one direction and said cam surface includes a segment to abut said second end for driving said first annular inclined toothed portion to partly engage with said second annular inclined toothed portion, and further comprising a second spring member disposed to slightly bias said first annular toothed portion toward said second annular toothed portion when said first and second annular toothed portion are partially engaged so as to permit uni-directional adjustment of angle between said first rod and said second rod.

2. An angle adjusting device comprising:

a first rod having a first head, said first head having a first annular toothed portion, and a first through hole coaxial with said first annular toothed portion;

a second rod having a second head, said second head having a second annular toothed portion for meshing said first annular toothed portion, and a second through hole coaxial with said second annular toothed portion;

a first spring member disposed between said first head and said second head for biasing said second annular toothed portion from said first annular toothed portion;

an axle having a threaded first end and a second end;

a fastening member constituted by a nut member screw threaded on said first end of said axle to hinder said first head from slipping off said axle; and

a lever pivoted with said second end including a cam surface abutting said second head for varying the axial position of said axle relative to said second head, whereby through cooperation with said fastening member, a variation of the relative position of said axle to said second head will drive said second annular toothed portion to engage or disengage said first annular toothed portion; and

wherein said axle has an axial key way and said nut member includes a third annular toothed portion disposed transversely to the threaded surface of said nut member, and further comprising a restricting member having a fourth annular toothed portion to mesh with said third annular toothed portion;

a through hole coaxial to said fourth annular toothed portion; and

a key axially disposed on the inner surface of said through hole for being received in said key way, whereby at the moment the nut member is screwed down to drive said first annular toothed portion to engage said second annular toothed portion, said third annular toothed portion will engage said fourth annular toothed portion and bring said axle as well as said lever to rotate relative to said first and second head so that the operation of said lever will not affect the original set position of said nut member relative to said axle.

3. An angle adjusting device comprising:

a first rod having a first head, said first head having a first annular toothed portion, and a first through hole coaxial with said first annular toothed portion;

a second rod having a second head, said second head having a second annular toothed portion for meshing said first annular toothed portion, and a second through hole coaxial with said second annular toothed portion;

a first spring member disposed between said first head and said second head for biasing said second annular toothed portion from said first annular toothed portion;

an axle having a first end and a second end;

a fastening member mounted on said first end of said axle to hinder said first head from slipping off said axle;

a lever pivoted with said second end including a cam surface abutting said second head for varying the axial position of said axle relative to said second head, whereby through cooperation with said fastening member, a variation of the relative position of said axle to said second head will drive said second annular toothed portion to engage or disengage said first annular toothed portion, wherein the teeth of said first annular toothed portion and said second annular toothed portion are inclined in one direction and said cam surface includes a segment to abut said second end for driving said first annular inclined toothed portion to partly engage with said second annular inclined toothed portion, and further comprising a second spring member disposed to slightly bias said first annular toothed portion toward said second annular toothed portion when said first and second annular toothed portion are partially engaged so as to permit uni-directional adjustment of angle between said first rod and said second rod, the outer wall of said second head having an annular recess coaxial with said second through hole, and said second spring being disposed between asid annular recess and said cam surface of said lever for biasing said lever from said second head.