Display adjustably positionable about swivel and pivot axes

1. An arrangement for variably supporting a display, the arrangement comprising,

(a) an overhead track,

(b) a carriage coupled to said overhead track such that said carriage can be variably positioned along said overhead track,

(c) a first arm coupled to and suspended from said carriage such that said first arm can be variably swiveled about the coupling to said carriage,

(d) a second arm coupled to said first arm such that said second arm can be variably positioned in different inclinations to said first arm and such that said second arm can be variably swiveled relative to said first arm about a first swivel axis, and

(e) a display coupled to said second arm by a subassembly, said subassembly comprising,

(i) a swivel member,

(ii) a mounting member affixed to a housing of said display, and

(iii) an elongate member extending between and connecting together said swivel member and said mounting member,

(iv) wherein,

(A) said swivel member is coupled to said second arm such that said mounting member can be variably swiveled relative to said second arm about a second swivel axis, said second swivel axis generally extending in parallel relation to said first swivel axis,

(B) said elongate member is mounted to,

(I) said swivel member for movement relative to said swivel member about a first pivot axis, and

(II) said mounting member for movement relative to said mounting member about a second pivot axis, said second swivel axis extending through said elongate member, and

(C) said first pivot axis is coplanar with said second swivel axis,

(f) wherein said second arm comprises a pair of parallel elongate members joined to form a four-bar-linkage parallelogram such that said first swivel axis and said second swivel axis remain in parallel relation during movement of said second arm between positions having varying inclinations to said first arm, and

(g) wherein said first pivot axis intersects said second swivel axis.

2. The arrangement of claim 1 , wherein said second swivel axis extends through said display.

3. The arrangement of claim 1 , further comprising an apparatus for receiving a person in a resting position.

4. The arrangement of claim 1 , wherein said apparatus is a dental chair.

5. The arrangement of claim 4 , wherein said dental chair includes a headrest, and wherein said overhead track extends directly over said headrest of said dental chair.

6. The arrangement of claim 4 , wherein said dental chair includes a headrest and wherein said display is adjustably suspended vertically above said headrest of said dental chair, with a display screen of said display disposed in a horizontal orientation, for viewing by a dental patient received in said dental chair.

7. The arrangement of claim 4 , wherein said dental chair includes a headrest and wherein said display is adjustably suspended vertically directly above said headrest of said dental chair, with a display screen of said display disposed in an orientation facing said headrest, for viewing by a dental patient received in said dental chair.

8. An arrangement for variably supporting a display, the arrangement comprising,

(a) a first arm mounted to a support by a coupling such that said first arm can be variably swiveled about the coupling to said support,

(b) a second arm coupled to said first arm such that said second arm can be variably positioned in different inclinations to said first arm and such that said second arm can be variably swiveled relative to said first arm about a first swivel axis, and

(c) a display coupled to said second arm by a subassembly, said subassembly comprising,

(i) a swivel member,

(ii) a mounting member affixed to a housing of said display, and

(iii) an elongate member extending between and connecting together said swivel member and said mounting member,

(iv) wherein,

(A) said swivel member is coupled to said second arm such that said mounting member can be variably swiveled relative to said second arm about a second swivel axis, said second swivel axis generally extending in parallel relation to said first swivel axis,

(B) said elongate member is mounted,

(I) to said swivel member for movement relative to said swivel member about a first pivot axis, and

(II) to said mounting member for movement relative to said mounting member about a second pivot axis, said second swivel axis extending through said elongate member, and

(C) said first pivot axis is coplanar with said second swivel axis,

(d) wherein said second arm comprises a pair of parallel elongate members joined to form a four-bar-linkage parallelogram such that said first swivel axis and said second swivel axis remain in parallel relation during movement of said second arm between positions having varying inclinations to said first arm, and

(e) wherein said first pivot axis intersects said second swivel axis.

9. The arrangement of claim 8 , wherein said first arm is mounted to a wall.

10. The arrangement of claim 8 , wherein said first arm is mounted to a ceiling.

11. The arrangement of claim 8 , wherein said second swivel axis extends through said display.

12. An arrangement for variably supporting a display, the arrangement comprising,

(a) an overhead track,

(b) a carriage coupled to said overhead track such that said carriage can be variably positioned along said overhead track,

(c) a first arm coupled to and suspended from said carriage such that said first arm can be variably swiveled about the coupling to said carriage,

(d) a second arm coupled to said first arm such that said second arm can be variably positioned in different inclinations to said first arm and such that said second arm can be variably swiveled relative to said first arm about a first swivel axis,

(e) a display coupled to said second arm such that a display screen of said display may be disposed in a horizontal orientation, and

(f) a dental chair for receiving a person in a resting position, wherein said dental chair includes a headrest,

(g) wherein said display is adjustably suspended vertically directly above said headrest of said dental chair, with said display screen disposed in an orientation facing said headrest, for viewing by the person received in said dental chair, and wherein said display is coupled to said second arm by a subassembly, said subassembly comprising,

(i) a swivel member,

(ii) a mounting member affixed to a housing of said display, and

(iii) an elongate member extending between and connecting together said swivel member and said mounting member,

(iv) wherein,

(A) said swivel member is coupled to said second arm such that said mounting member can be variably swiveled relative to said second arm about a second swivel axis, said second swivel axis generally extending in parallel relation to said first swivel axis,

(B) said elongate member is mounted,

(I) to said swivel member for movement relative to said swivel member about a first pivot axis, and

(II) to said mounting member for movement relative to said mounting member about a second pivot axis, said second swivel axis extending through said elongate member, and

(C) said first pivot axis intersects said second swivel axis, and

(D) said first pivot axis is coplanar with said second swivel axis.

13. The arrangement of claim 12 , wherein said second arm comprises a pair of parallel elongate members joined to form a four-bar-linkage parallelogram such that said first swivel axis and said second swivel axis remain in parallel relation during movement of said second arm between positions having varying inclinations to said first arm.

14. The arrangement of claim 13 , wherein said overhead track extends directly over said headrest of said dental chair.

15. The arrangement of claim 13 , wherein said display screen of said display is disposed in a horizontal orientation.