US3769933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Replacement control knob
Assignee: Robertshaw Controls Co
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Filing: 1972-08-22
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Granted: 1973-11-06
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Expires: 1992-08-22
Abstract
Abstract A replacement control knob for installation on first and second controls having rotary control stems formed with respective index elements disposed at respective first and second relative rotational positions with respect to respective indicators included on such controls. The knob includes a body formed with a passage for receipt of such stems and including an index key cooperating with the index element to index rotational positioning of the body on such stem. The body is formed with a dial mount and a removable dial is received thereon and is shiftable to first and second clocked positions corresponding with the first and second relative rotational positions of the index elements with respect to the indicators. Retainer means is included on the dial for retaining it on the body in the selected first or second clocked position. Thus, by merely selecting the desired clocked position for the dial as it is mounted on the body, the assembled knob may be utilized interchangeably on either the first or second controls.
Inventors
- 👤 D Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:11
CPC Classifications
F; F24; F24C; F24C7/00; F24C7/08; F24C7/082; F24C3/00; F24C3/12; F24C3/124; G; G05; G05G; G05G1/00; G05G1/08; G05G1/10; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20576; Y10T74/20732; Y10T74/20834; Y10T74/2084
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
231 words
A replacement control knob for use with first and second controls having rotary control stems formed with respective index elements disposed at first and second relative rotational positions with respect to respective indicators included on such controls when said stems are in predetermined set positions, said knob comprising: a body formed with a passage for receipt of the stems; a key in said passage for engaging the index elements to index said body relative to said stems; a dial mount on said body; a dial removably mounted on said mount and including indicia registerable with said indicators and shiftablE to first and second clocked positions on said mount corresponding with the first and second relative rotational positions of the respective index elements with respect to the indicators; retainer means on said dial for removably retaining said dial on said mount in said first and second clocked position whereby said dial may be mounted on said body in said first clocked position to align said indicia with the indicator on said first control when said knob is mounted thereon and said first stem is in said predetermined set position and, alternatively, said dial may be mounted on said body in said second clocked position to align said indicia with the indicator on said second control element when said knob is mounted thereon and said second stem is in said predetermined set position.
Claim 2
Dependent Claim
231 words
A replacement control knob for use with first and second controls having rotary control stems formed with respective index elements disposed at first and second relative rotational positions with respect to respective indicators included on such controls when said stems are in predetermined set positions, said knob comprising: a body formed with a passage for receipt of the stems; a key in said passage for engaging the index elements to index said body relative to said stems; a dial mount on said body; a dial removably mounted on said mount and including indicia registerable with said indicators and shiftablE to first and second clocked positions on said mount corresponding with the first and second relative rotational positions of the respective index elements with respect to the indicators; retainer means on said dial for removably retaining said dial on said mount in said first and second clocked position whereby said dial may be mounted on said body in said first clocked position to align said indicia with the indicator on said first control when said knob is mounted thereon and said first stem is in said predetermined set position and, alternatively, said dial may be mounted on said body in said second clocked position to align said indicia with the indicator on said second control element when said knob is mounted thereon and said second stem is in said predetermined set position.
Claim 3
Dependent Claim
50 words
A replacement control knob as set forth in claim 1 that includes: locator rib means on said knob and first and second locator groove means on said dial for receiving said rib means when said dial is in said respective first and second rotational positions with respect to said key.
Claim 4
Dependent Claim
33 words
A replacement control knob as set forth in claim 1 wherein: said mount is formed with a peripheral flange for surrounding said dial and projecting therebeyond to guard said dial against accidental dislodgement.
Claim 5
Dependent Claim
56 words
A replacement control knob as set forth in claim 1 wherein: said body is formed with a central post having an enlarged in cross section base forming said mount and a through knock-out hole; and said dial overlies said base whereby the underside of said dial is accessible through said hole for removal of said dial.
Claim 6
Dependent Claim
38 words
A replacement control knob as set forth in claim 1 wherein: said body is formed with a peripheral channel; and said retainer includes resilient fingers pro-jecting from said dial for frictional engagement with the wall of said channel.
Claim 7
Dependent Claim
57 words
A replacement control knob as set forth in claim 1 wherein: said body is circular and includes locator rib means; and said dial means is circular and includes locator groove means disposed every 90* thereabout for selective receipt of said rib means whereby said dial may be fitted on said body at relative rotational orientations of 90*.
Claim 8
Dependent Claim
47 words
A replacement control knob as set forth in claim 1 wherein: said body is formed with a frustum conically shaped post and an enlarged-in-diameter base formed with a peripheral flange; and said dial is ring-shaped and closely fits between the base of said post and said flange.
Claim 9
Dependent Claim
37 words
A replacement control knob as set forth in claim 1 wherein: said mount is formed with an annular recess defining a dial support surface; said dial is recessed within said recess to be protected against accidental dislodgement.
Claim 10
Dependent Claim
36 words
A replacement control knob as set forth in claim 1 that includes: a bezel surrounding said knob body and including said indicator thereon; means for removably mounting said bezel on said controls in various angular positions.
Claim 11
Dependent Claim
45 words
A replacement control knob as set forth in claim 2 wherein: said body is formed with a central cylindrically shaped post having said rib means formed on the arcuate wall thereof; and said dial is ring-shaped with said groove means formed in the interior thereof.
Claim 12
Dependent Claim
27 words
A replacement control knob as set forth in claim 5 wherein: said resilient fingers are formed with outwardly dimpled projections for engaging said wall of said groove.
Claim 13
Dependent Claim
49 words
A replacement control knob as set forth in claim 7 that includes: axial locator rib means on said post; first and second internal groove means on the interior of said dial and engageable with said groove means when said dial is in said respective first and second rotational positions.
Claim 14
Dependent Claim
25 words
A replacement control knob as set forth in claim 1 that includes: a second dial including second indicia thereon for selective registration with said indicators.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |