US3724280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manual tuning apparatus for radio receiver
Assignee: Motorola Solutions Inc
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Filing: 1971-05-14
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Granted: 1973-04-03
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Expires: 1991-05-14
Abstract
Abstract Manual tuning apparatus for a pushbutton type radio receiver includes a capstan drive shaft mounted for rotation in response to the manual rotation of the radio tuning knob. A leaf spring coupled to the core carriage of the slug tuned coil assembly of the radio receiver is held in frictional engagement with the drive shaft and moved along a path adjacent the shaft in response to the rotation of the tuning knob, to in turn adjust the setting of the tuning coil assembly. Upon depression of a pushbutton to select a preset radio frequency, the leaf spring is releasable from engagement with the drive shaft to disable momentarily, the manual tuning apparatus.
Inventors
- 👤 E Olah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:41
CPC Classifications
H; H03; H03J; H03J5/00; H03J5/02; H03J5/04; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18888
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
166 words
Manual tuning apparatus for use in a pushbutton type radio receiver for controlling the position of movable tuning elements, said manual tuning apparatus including in combination: rotatable drive shaft means, manually operable selector means coupled to said drive shaft means for rotation thereof in response to the operation of said selector means, a member connectible with said tuning elements, said member extending transverse the axial direction of said drive shaft means and mounted for frictional engagement therewith, whereby upon rotation of said shaft means, said member is moved along a path adjacent said shaft means, thereby to change the position of said tuning elements in accordance therewith, resiliently biased means mounted for engagement with said member and providing sufficient force thereagainst to maintain said member in frictional engagement with said rotatable drive shaft means and declutch means including a member mounted for movement into engagement with said resiliently biased means during the operation of a pushbutton to substantially remove said force against said transversely extending member.
Claim 2
Dependent Claim
166 words
Manual tuning apparatus for use in a pushbutton type radio receiver for controlling the position of movable tuning elements, said manual tuning apparatus including in combination: rotatable drive shaft means, manually operable selector means coupled to said drive shaft means for rotation thereof in response to the operation of said selector means, a member connectible with said tuning elements, said member extending transverse the axial direction of said drive shaft means and mounted for frictional engagement therewith, whereby upon rotation of said shaft means, said member is moved along a path adjacent said shaft means, thereby to change the position of said tuning elements in accordance therewith, resiliently biased means mounted for engagement with said member and providing sufficient force thereagainst to maintain said member in frictional engagement with said rotatable drive shaft means and declutch means including a member mounted for movement into engagement with said resiliently biased means during the operation of a pushbutton to substantially remove said force against said transversely extending member.
Claim 3
Dependent Claim
36 words
Manual tuning apparatus as claimed in claim 1 wherein said resiliently biased means include a freely rotatable roller mounted for rolling engagement with said member and spring means urging said roller into engagement with said member.
Claim 4
Dependent Claim
208 words
Manual tuning apparatus for use in a pushbutton type radio receiver for controlling the position of movable wave signal tuning elements, said manual tuning apparatus including in combination; a manual tuning knob mounted for rotation on a first shaft, said shaft including first gear means, a second rotatable shaft having second gear means mounted thereon in meshing engagement with said first gear means, an elongated member having substantially flat side surfaces connectible with said tuning elements, said member extending transverse the axial direction of said second rotatable shaft with a first flat surface thereof engaging said last-mentioned shaft, roller means mounted for rotation adjacent the opposite flat surface of said member and resilient biasing means urging said roller means into engagement with said member and providing a force thereagainst sufficient to maintain said member in frictional engagement with said second rotatable shaft, whereby upon rotation of said tuning knob, said member is driven by said second rotatable shaft along a path, thereby to change the positioning of said tuning elements, and declutch means including a member mounted for movement into engagement with said resilient biasing means to release the latter during the operation of a pushbutton in said radio to substantially remove said force against said elongated member.
Claim 5
Dependent Claim
208 words
Manual tuning apparatus for use in a pushbutton type radio receiver for controlling the position of movable wave signal tuning elements, said manual tuning apparatus including in combination; a manual tuning knob mounted for rotation on a first shaft, said shaft including first gear means, a second rotatable shaft having second gear means mounted thereon in meshing engagement with said first gear means, an elongated member having substantially flat side surfaces connectible with said tuning elements, said member extending transverse the axial direction of said second rotatable shaft with a first flat surface thereof engaging said last-mentioned shaft, roller means mounted for rotation adjacent the opposite flat surface of said member and resilient biasing means urging said roller means into engagement with said member and providing a force thereagainst sufficient to maintain said member in frictional engagement with said second rotatable shaft, whereby upon rotation of said tuning knob, said member is driven by said second rotatable shaft along a path, thereby to change the positioning of said tuning elements, and declutch means including a member mounted for movement into engagement with said resilient biasing means to release the latter during the operation of a pushbutton in said radio to substantially remove said force against said elongated member.
Claim 6
Dependent Claim
58 words
Manual tuning apparatus as claimed in claim 3 wherein said roller means include a roller mounted for rotation on a pivotal arm and wherein said resilient biasing means include a spring coupled to said arm, providing a force thereagainst to rotate said arm about its pivot point, thereby to move said roller into engagement with said elongated arm.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |