Control device having push to turn selector means and method of making the same

• US 5,020,389 A
• Filed: 08/30/1989
• Issued: 06/04/1991
• Est. Priority Date: 08/30/1989
• Status: Expired due to Fees

• Current Assignee: Robertshaw Controls Company 1701 BYRD Avenue Richmond VA
• Original Assignee: Robertshaw Controls Company (Schneider Electric SE)
• Inventors: Sigler, Kent K.
• Primary Examiner(s): Bonck, Rodney H.
• Application Number:
  US07/400,475
• Time in Patent Office: 643 Days
• Field of Search: 74/553, 74/10 R, 74/527, 464/162, 464/169, 403/335, 192/67 P
• US Class Current: 74/553
• CPC Class Codes: F16B 2200/50 Flanged connections
• CPC Class Codes: G05G 1/082 having safety devices, e.g. means for disengaging the control member from the actuated member
• CPC Class Codes: H01H 37/20 by varying the position of the thermal element in relation to switch base or casing
• CPC Class Codes: Y10T 74/20636 Detents
• CPC Class Codes: Y10T 74/2084 Knob or dial

Abstract

A control device having a push to turn selector arrangement and method of making the same are provided, the control device comprising a support unit, a first selector member threadedly carried by the support unit so as to be rotatable and axially movable relative thereto, a second selector member rotatably carried by the support unit and being axially movable relative thereto, a coupling structure coupling the selector members together to cause the first selector member to rotate in unison with the second selector member when the second selector member is axially pushed inwardly and then rotated, and a spring unit disposed between the selector members to tend to maintain the second selector member axially away from the first selector member, the couping unit comprising a drive plate rotatably carried by the suport unit intermediate the selector members and having parts thereof respectively splined to the selector members to transmit rotatable movement of the second selector member to the first selector member while permitting axial movement of the selector members relative to the drive plate.

Claims

1. In a control device having a push to turn selector means and comprising a support means, a first selector member threadedly carried by said support means so as to be rotatable and axially movable relative thereto, a second selector member rotatably carried by said support means and being axially movable relative thereto, coupling means coupling said selector members together to cause said first selector member to rotate in unison with said second selector member when said second selector member is axially pushed inwardly and then rotated, and spring means disposed between said selector members to tend to maintain said second selector member axially away from said first selector member, the improvement wherein said coupling means comprising a drive plate rotatably carried by said support means intermediate said selector members and having means respectively splined to said selector members to transmit rotatable movement of said second selector member to said first selector member while permitting axial movement of said selector members relative to said drive plate, said drive plate comprising a one-piece member with its spline means, said spline means comprising a plurality of tangs bent relative to said drive plate.

2. A control device as set forth in claim 1 wherein said drive plate is rotatably disposed on said first selector member.

3. A control device as set forth in claim 1 wherein said spline means comprise a pair of said tangs splined with said first selector member and a pair of said tangs splined with said second selector member.

4. A control device as set forth in claim 3 wherein said pair of tangs that are splined with said second selector member are disposed radially outward of said spring means.

5. A control device as set forth in claim 1 and comprising control structure carried by said control device and being operatively associated with said drive plate to be operated by the rotational movement of said drive plate.

6. A control device as set forth in claim 5 wherein said control structure comprises a cam member rotatably carried by said support means.

7. A control device as set forth in claim 6 wherein said cam member and said drive plate have means splining the same together so that said cam member rotates in unison with said drive plate.

8. In a control device having a push to turn selector means and comprising a support means, a first selector member threadedly carried by said support means so as to be rotatable and axially movable relative thereto, a second selector member rotatably carried by said support means and being axially movable relative thereto, coupling means coupling said selector members together to cause said first selector member to rotate in unison with said second selector member when said second selector member is axially pushed inwardly and then rotated, and spring means disposed between said selector members to tend to maintain said second selector member axially away from said first selector member, the improvement wherein said coupling means comprises a drive plate rotatably carried by said support means intermediate said selector members and having means respectively splined to said selector members to transmit rotatable movement of said second selector member to said first selector member while permitting axial movement of said selector members relative to said drive plate, said control device comprising control structure carried by said control device and being operatively associated with said drive plate to be operated by the rotational movement of said drive plate, said drive plate having a cam surface that is operatively associated with said control structure to operate the same in relation to the rotational position of said drive plate.