Touch-controlled circuit apparatus for voltage selection

• US 4,494,105 A
• Filed: 03/26/1982
• Issued: 01/15/1985
• Est. Priority Date: 03/26/1982
• Status: Expired due to Term

• Current Assignee: Spectra Symbol Corp. (Zebra Technologies Corporation)
• Original Assignee: Spectra Symbol Corp. (Zebra Technologies Corporation)
• Inventors: House, V. Dean
• Primary Examiner(s): Albritton, C. L.
• Application Number:
  US06/362,475
• Time in Patent Office: 1,026 Days
• Field of Search: 338/69, 338/114, 84/DIG. 7, 84/1.17, 84/1.24
• US Class Current: 338/114
• CPC Class Codes: G06F 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
• CPC Class Codes: H03G 3/04 in untuned amplifiers

Abstract

A touch-controlled apparatus of the type in which two parts of a circuit component are selectively brought into contact, which includes plural circuit components. In one embodiment the two components (at least one of which must be a potentiometer) are co-planar and longitudinally aligned. In another embodiment two co-planar potentiometers are disposed in parallel side-by-side relation so as to be simultaneously actuated by the same touch pressure. In a third embodiment two or more components are disposed in two different stacked layers for simultaneous or sequential operation. An improved sample and hold output circuit includes only a parallel capacitor, or a series resistor and parallel capacitor, connected to one part of a circuit component. The component may be formed as three folded sections of a single sheet-like member, the sections being foldable into a three-tiered stack.

Claims

1. A pressure contact control apparatus comprising:

a first member having a first elongated electrically resistive surface on at least a part of a first side thereof;

a second member having a first elongated electrically conductive surface on a first side thereof;

at least one further surface on said first side of said first member having predetermined electrical conductivity characteristics, said further surface being spaced apart from said first resistive surface;

means for supporting the first and second members such that the first conductive surface is presented in closely spaced proximity with respect to both said first resistive surface and said further surface; and

wherein one of the first and second members is sufficiently flexible to permit electrical contact between a selected one of (a) the first conductive surface and the first resistive surface and (b) the first conductive surface and said further surface in response to application of localized pressure to at least one of the first and second members.

2. A pressure contact control apparatus as defined in claim 1 further comprising:

a third member having a surface of known electrical conductivity characteristics;

a second elongated electrically conductive surface on the other side of said first member, said second electrically conductive surface being at least partially aligned depthwise with at least one of the first resistive surface and said further surface, and said second electrically conductive surface facing away from the first resistive surface;

means for supporting the third member in juxtaposition to said first member such that the second conductive surface is presented in closely spaced proximity with respect to said other side of said first member; and

wherein at least one of said first and third members is sufficiently flexible to permit selective electrical contact between said second conductive surface and the surface of the third member in response to application of localized pressure to at least one of said first and third members.

3. A pressure contact control apparatus as defined in claim 2 wherein the surface of the third member is at least in part electrically resistive.

4. A pressure contact control apparatus as defined in claim 2 wherein said surface of the third member is at least in part electrically conductive.

5. A pressure contact control element as defined in claim 1 further comprising:

a third member having a second electrically conductive surface;

an additional surface having known electrical conductivity characteristics on the other side of said first member, said additional surface being at least partially aligned depthwise with said second conductive surface;

means for supporting the third member in juxtaposition to said first member such that said second conductive surface and said additional surface are in closely spaced proximity; and

wherein at least one of said first and third members is sufficiently flexible to permit selective electrical contact between the second conductive surface and the additional surface in response to application of localized pressure to at least one of said first and third members.

6. A pressure contact control apparatus as defined in claim 5 wherein said additional surface is electrically resistive.

7. A pressure contact control apparatus as defined in claim 5 wherein said additional surface is electrically conductive.

8. A pressure contact control apparatus as defined in claim 1 wherein said further surface is electrically conductive so as to cooperate with said first conductive surface to comprise a switch.

9. A pressure contact control apparatus as defined in claim 8 further comprising:

a third member having a surface of known electrical conductivity characteristics;

a second elongated electrically conductive surface on the other side of said first member, said second electrically conductive surface being at least partially aligned depthwise with at least one of the first resistive surface and said further surface, and said second electrically conductive surface facing away from the first resistive surface;

means for supporting the third member in juxtaposition to said first member such that the second conductive surface is presented in closely spaced proximity with respect said other side of said first member; and

wherein at least one of said first and third members is sufficiently flexible to permit selective electrical contact between said second conductive surface and the surface of the third member in response to application of localized pressure to at least one of said first and third members.

10. A pressure contact control apparatus as defined in claim 8 further comprising:

a third member having a second electrically conductive surface;

an additional surface having known electrical conductivity characteristics on the other side of said first member, said additional surface being at least partially aligned depthwise with said second conductive surface;

means for supporting the third member in juxtaposition to said first member such that said second conductive surface and said additional surface are in closely spaced proximity; and

wherein at least one of said first and third members is sufficiently flexible to permit selective electrical contact between the second conductive surface and the additional surface in response to application of localized pressure to at least one of said first and third members.

11. A pressure contact control apparatus as defined in claim 1 wherein said further surface is electrically resistive so that each of said first resistive surface and said further surface co-operates with said conductive surface to comprise respective potentiometers.

12. A pressure contact control apparatus as defined in claim 11 further comprising:

a third member having a surface of known electrical conductivity characteristics;

a second elongated electrically conductive surface on the other side of said first member, said second electrically conductive surface being at least partially aligned depthwise with at least one of the first resistive surface and said further surface, and said second electrically conductive surface facing away from the first resistive surface;

means for supporting the third member in juxtaposition to said first member such that the second conductive surface is presented in closely spaced proximity with respect to said other side of said first member; and

wherein at least one of said first and third members is sufficiently flexible to permit selective electrical contact between said second conductive surface and the surface of the third member in response to application of localized pressure to at least one of said first and third members.

13. A pressure contact control apparatus as defined in claim 11 further comprising:

a third member having a second electrically conductive surface;

an additional surface having known electrical conductivity characteristics on the other side of said first member, said additional surface being at least partially aligned depthwise with said second conductive surface;

means for supporting the third member in juxtaposition to said first member such that said second conductive surface and said additional surface are in closely spaced proximity; and

wherein at least one of said first and third members is sufficiently flexible to permit selective electrical contact between the second conductive surface and the additional surface in response to application of localized pressure to at least one of said first and third members.

14. A pressure contact control apparatus as defined in claim 11 further comprising an additional conductive surface on the second member in spaced longitudinal alignment with said first resistive surface and said further surface and presented in closely spaced proximity with respect to the first conductive surface to provide a selectively actuable electrical switch which is actuable when said additional and first conductive surfaces are brought into contact by flexure of said one of the first and second members.

15. A pressure contact control apparatus as defined in claim 14 further comprising:

a third member having a surface of known electrical conductivity characteristics;

a second elongated electrically conductive surface on the other side of said first member, said second electrically conductive surface being at least partially aligned depthwise with at least one of the first resistive surface and said further surface, and said second electrically conductive surface facing away from the first resistive surface;

means for supporting the third member in juxtaposition to said first member such that the second conductive surface is presented in closely spaced proximity with respect to said other side of said first member; and

wherein at least one of said first and third members is sufficiently flexible to permit selective electrical contact between said second conductive surface and the surface of the third member in response to application of localized pressure to at least one of said first and third members.

16. A pressure contact control apparatus as defined in claim 14 further comprising:

a third member having a second electrically conductive surface;

an additional surface having known electrical conductivity characteristics on the other side of said first member, said additional surface being at least partially aligned depthwise with said second conductive surface;

means for supporting the third member in juxtaposition to said first member such that said second conductive surface and said additional surface are in closely spaced proximity; and

wherein at least one of said first and third members is sufficiently flexible to permit selective electrical contact between the second conductive surface and the additional surface in response to application of localized pressure to at least one of said first and third members.

17. A pressure contact control apparatus as defined in claim 1 further comprising means for storing a signal representative of the most recent point of contact between said first conductive surface and said first resistive and further surfaces.

18. A pressure contact control apparatus as defined in claim 17 wherein the storing means comprises a sample and hold circuit including a capcitance connected between said first conductive surface and a reference point.

19. A pressure contact control apparatus as defined in claim 17 wherein the storing means comprises a sample and hold circuit including a resistance and a capacitance, said resistance being connected between said first conductive surface and said capacitance, said capacitance being connected between said resistance and a reference point.

20. A pressure contact control apparatus as defined in claim 1 wherein the first and second members are respective sections of a common structure in which said first member section is folded over said second member section along a fold line extending parallel to the longitudinal dimension of the first resistive surface, and wherein the supporting means includes spacer means disposed between the first and second member sections for maintaining the first conductive surface spaced from the resistive and further surfaces.

21. A pressure contact control apparatus comprising:

a first member comprising first and second surfaces having predetermined electrical conductivity characteristics on one side thereof, said second surface being substantially co-planar with the first surface;

a second member comprising a first electrically conductive surface;

means for supporting the first and second members such that said first conductive surface is presented in closely spaced proximity with respect to both the first and second surfaces of said first member; and

wherein one of the first and second members is sufficiently flexible to permit electrical contact between the first conductive surface of said second member and a selected one of the first and second surfaces of said first member in response to application of localized pressure to at least one of the first and second members.

22. A pressure contact control apparatus as defined in claim 21 further comprising:

a third member comprising a third surface of known electrical conductivity characteristics;

a second electrically conductive surface on the other side of said first member, said second electrically conductive surface being at least partially aligned depthwise with said third surface and facing said third surface;

means for supporting said third member in juxtaposition to said first member in closely spaced proximity thereto; and

wherein at least one of said first and third members is sufficiently flexible to permit selective electrical contact between said second conductive surface and said third surface in response to application of localized pressure to at least one of said first and third members.

23. A pressure contact control apparatus as defined in claim 22 wherein said third surface of the third member is electrically resistive.

24. A pressure contact control apparatus as defined in claim 22 wherein said third surface of the third member is electrically conductive.

25. A pressure contact control apparatus as defined in claim 21 further comprising:

a third member having a second electrically conductive surface;

an additional surface having known electrical conductivity characteristics on the other side of said first member, said additional surface being at least partially aligned depthwise with said second conductive surface and facing said second conductive surface;

means for supporting the third member in juxtaposition to said first member such that said second conductive surface and said additional surface are in closely spaced proximity; and

wherein at least one of said first and third members is sufficiently flexible to permit selective electrical contact between the second conductive surface and the additional surface in response to application of localized pressure to at least one of said first and third members.

26. A pressure contact control apparatus as defined in claim 25 wherein said additional surface is electrically resistive.

27. A pressure contact control apparatus as defined in claim 25 wherein said additional surface is electrically conductive.

28. A pressure contact control apparatus as defined in claim 21 further comprising means for storing a signal representative of the most recent point of contact between said first conductive surface and said first resistive and further surfaces.

29. A pressure contact control apparatus as defined in claim 28 further comprising a sample and hold circuit including a capacitance connected between the first conductive surface and a reference point.

30. A pressure contact control apparatus as defined in claim 28 further comprising a sample and hold circuit including a resistance and a capacitance, said resistance being connected between the first conductive surface and the capacitance, and said capacitance being connected between the resistance and a reference point.

31. A pressure contact control apparatus as defined in claim 21 wherein the first and second members are respective sections of a common structure in which the first member section is folded over the second member section along a fold line extending parallel to the longitudinal dimension of the first resistive surface, and wherein the supporting means includes spacer means between the first and second member sections for maintaining the first conductive surface spaced from the resistive and further surfaces.

32. A pressure contact control apparatus comprising:

a first member, having a first surface of a first predetermined electrical conductivity characteristic;

a second member having a second surface of a second predetermined electrical conductive characteristic;

a third member having first and second oppositely facing sides;

a third surface disposed on the first side of the third member and having a third predetermined electrical conductivity characteristic;

a fourth surface of said third member disposed on the second side of the third member and having a fourth predetermined electrical conductivity characteristic;

means supporting the first, second, and third members in a stack with the third member disposed between said first and second members, with the first and third surfaces mutually presented in closely spaced proximity, and with the second and fourth surfaces mutually presented in closely spaced proximity; and

wherein at least two of the members are sufficiently flexible to permit selectively galvanic contact between the first and third surfaces and between the second and fourth surfaces in response to application of localized pressure to said members.

33. A pressure contact control apparatus as defined in claim 32 wherein the first surface is electrically conductive and is elongated, wherein the third surface is electrically resistive and is elongated in substantial alignment with the first surface, and wherein the second and fourth surfaces are electrically conductive.

34. A pressure contact control apparatus as defined in claim 32 wherein the first and third surfaces comprise a potentiometer, and wherein the second and fourth surfaces comprise an electrical switch.

35. A pressure contact control apparatus as defined in claim 34, wherein the first surface is electrically conductive and is elongated, wherein the third surface is electrically resistive and is elongated in substantial alignment with the first surface, and wherein the second and fourth surfaces are electrically conductive.

36. A pressure contact control apparatus as defined in claim 32 further comprising means for storing a signal representative of the most recent point of contact between the conductive surface and the resistive and further surfaces.

37. A pressure contact control apparatus as defined in claim 36 wherein the storing means comprises a sample and hold circuit including a capacitance connected between one of said surfaces and a reference point.

38. A pressure contact control apparatus as defined in claim 36 further comprising a sample and hold circuit including a resistance and a capacitance connected in series between one of said surfaces and a reference point, there being a junction between the resistance and capacitance serving as an output terminal for the apparatus.

39. A pressure contact control apparatus as defined in claim 32 further comprising a fifth surface of the third member, spaced from the third surface, and presented in close proximity to the first surface, said fifth surface having a fifth predetermined electrical conductivity characteristic.

40. A pressure contact control apparatus as defined in claim 32 further comprising:

a fifth surface of the first member, said fifth surface having a fifth predetermined electrical conductivity characteristic; and

a sixth surface of the first side of the third member presented in closely spaced proximity to the fifth surface, said sixth surface having a sixth predetermined electrical conductive characteristic.

41. A pressure contact control apparatus as defined in claim 40 wherein the first and fifth surfaces are elongated and longitudinally aligned, and wherein the fifth and sixth surfaces are elongated and longitudinally aligned.

42. A pressure contact control apparatus as defined in claim 40 wherein the fifth surface and the first surface are substantially parallel, and wherein the third surface and the sixth surface are substantially parallel.

43. A pressure contact control apparatus as defined in claim 39 further comprising:

a seventh surface of the second member, said seventh surface having a seventh predetermined electrical conductivity characteristic; and

an eighth surface of the second side of the third member presented in closely spaced proximity to the seventh surface, said eighth surface having an eighth predetermined electrical conductivity characteristic.

44. A pressure contact control apparatus as defined in claim 40 wherein the first and third surfaces are elongated and substantially co-extensive, and wherein the fifth and sixth surfaces are spaced from the first and third surfaces, respectively.

45. A pressure contact control apparatus as defined in claim 44 wherein the first and fifth surfaces are elongated and longitudinally aligned, and wherein the fifth and sixth surfaces are elongated and longitudinally aligned.

46. A pressure contact control apparatus as defined in claim 44 wherein the fifth surface and the first surface are substantially parallel, and wherein the third surface and the sixth surface are substantially parallel.

47. A pressure contact control apparatus as defined in claim 43 wherein the fifth and sixth surfaces are elongated and substantially co-extensive.

48. A pressure contact control apparatus as defined in claim 47 wherein the first and fifth surfaces are elongated and longitudinally aligned, and wherein the fifth and sixth surfaces are elongated and longitudinally aligned.

49. A pressure contact control apparatus as defined in claim 47 wherein the fifth surface and the first surface are substantially parallel, and wherein the third surface and the sixth surface are substantially parallel.