US3756191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dial pointer driver assembly for radio receiver
Assignee: Motorola Solutions Inc
•
Filing: 1972-09-25
•
Granted: 1973-09-04
•
Expires: 1992-09-25
Abstract
Abstract A dial pointer assembly for a manually tunable radio receiver includes a slide member carrying a pointer and mounted for movement along a path parallel to a dial scale. Coupled between the slide member and a movable variable frequency tuning core carriage of the radio receiver is a parallelogram linkage including a plurality of pivotally interconnected arms which serve to define portions of first and second parallelograms; the arms of the second of which are shorter in length than those of the first. A point of interconnection of a pair of arms of the second defined parallelogram is coupled operatively to a driver mechanism including a bell crank connected to the core carriage. Movement of the latter by operation of the manual tuning controls of the radio receiver; i.e., pushbutton or manual control knob, drives the pointer mechanism with respect to the dial scale. The movement of the slide member and pointer mechanism is magnified by the ratio of the length of an arm of the first parallelogram with respect to the length of an arm of the second.
Inventors
- 👤 E Olah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 02:19
CPC Classifications
H; H03; H03J; H03J1/00; H03J1/02; H03J1/04; H03J1/045; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18992
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
302 words
In a radio tuner apparatus including manually operated tuner control means and variable frequency tuning means coupled to said manually operated tuner control means for movement thereby along a predetermined path to adjust the frequency setting of said radio tuner, an indicating assembly for displaying visually the frequency setting of said tuning means, including in combination; a dial scale having indicia thereon corresponding to the frequencies to which said variable frequency tuning means can be adjusted, a pointer movable along a path adjacent said dial scale in cooperation therewith and pointer driver means interposed between said variable frequency tuning means and said pointer for movement of the latter in accordance with the movement of the former, said pointer driver means including a parallelogram linkage assembly including first means defining a first parallelogram having arms of a predetermined length, and second means defining a second parallelogram having arms of a second predetermined length, shorter than the arms of said first means, at least one of the arms of said lastmentioned parallelogram being coextensive with one of the arms of said first-mentioned parallelogram and being formed from a portion thereof, said arms of said parallelograms being pivotally interconnected and a first point of connection of a pair of arms defining said second parallelogram providing a driving point, and a point of interconnection of corresponding arms defining said first parallelogram providing a driven point, said pointer being connected to said driven point and said variable frequency tuning means being operatively coupled to said driving point, whereby upon movement of the latter said pointer is moved correspondingly with respect to said dial scale, the movement of said driven point being magnified by the ratio of the length of an arm defining said first parallelogram with respect to the length of an arm defining said second parallelogram.
Claim 2
Dependent Claim
302 words
In a radio tuner apparatus including manually operated tuner control means and variable frequency tuning means coupled to said manually operated tuner control means for movement thereby along a predetermined path to adjust the frequency setting of said radio tuner, an indicating assembly for displaying visually the frequency setting of said tuning means, including in combination; a dial scale having indicia thereon corresponding to the frequencies to which said variable frequency tuning means can be adjusted, a pointer movable along a path adjacent said dial scale in cooperation therewith and pointer driver means interposed between said variable frequency tuning means and said pointer for movement of the latter in accordance with the movement of the former, said pointer driver means including a parallelogram linkage assembly including first means defining a first parallelogram having arms of a predetermined length, and second means defining a second parallelogram having arms of a second predetermined length, shorter than the arms of said first means, at least one of the arms of said lastmentioned parallelogram being coextensive with one of the arms of said first-mentioned parallelogram and being formed from a portion thereof, said arms of said parallelograms being pivotally interconnected and a first point of connection of a pair of arms defining said second parallelogram providing a driving point, and a point of interconnection of corresponding arms defining said first parallelogram providing a driven point, said pointer being connected to said driven point and said variable frequency tuning means being operatively coupled to said driving point, whereby upon movement of the latter said pointer is moved correspondingly with respect to said dial scale, the movement of said driven point being magnified by the ratio of the length of an arm defining said first parallelogram with respect to the length of an arm defining said second parallelogram.
Claim 3
Dependent Claim
57 words
Radio tuner apparatus as claimed in claim 1 wherein said dial scale is elongated and extends in a substantially straight line between opposite sides of said radio tuner and wherein said indicating assembly further includes a member movable along a fixed path substantially parallel to said dial scale, said pointer being mounted for movement on said member.
Claim 4
Dependent Claim
190 words
Radio tuner apparatus as claimed in claim 2 wherein said first means defining said first parallelogram include first and second arms of equal length, first ends of said arms being coupled together pivotally, the second end of a first one of said arms being coupled pivotally to a stationary support and the second end of said second one of said arms being coupled pivotally to said member movable along said fixed path, wherein said second means defining said second parallelogram include an arm coupled pivotally at a first location thereon to said first one of said arms included in said first parallelogram, between first and second ends of the latter nearer the stationary pivotal point thereof, and coupled pivotally at a second location thereon to said driving point, and wherein said parallelogram linkage assembly further includes a support arm coupled pivotally to said arm defining said second parallelogram at the point thereof coupled to said driving point and pivotally to the second arm defining said first parallelogram at a location thereon whereby said support arm is maintained in parallel relation to said first arm defining said parallelogram, at all times.
Claim 5
Dependent Claim
77 words
Radio tuner apparatus as claimed in claim 1 wherein said pointer driver means further includes a bell crank mounted for pivotal movement, a first leg of said bell crank being coupled to said variable frequency tuning means and the second leg thereof being coupled to said parallelogram linkage assembly for operatively moving said driving point in response to the movement of said variable frequency tuning means, thereby to drive said pointer with respect to said dial scale.
Claim 6
Dependent Claim
64 words
Radio tuner apparatus as claimed in claim 4 wherein said variable frequency tuning means includes a bar member movable along a predetermined path having a slot formed therein and wherein the first leg of said bell crank includes a protrusion extending therefrom and received in said slot for sliding and pivotal motion with respect thereto in response to the movement of said core bar.
Claim 7
Dependent Claim
50 words
Radio tuner apparatus as claimed in claim 4 wherein said pointer drive means further includes an arm member interposed between said parallelogram linkage and said bell crank for translating the rotational movement of said bell crank into corresponding movement for driving said pointer along said path adjacent said dial scale.
Claim 8
Dependent Claim
48 words
Radio tuner apparatus as claimed in claim 3 wherein said arm member is of a predetermined length and is connected pivotally at a first end thereof to the driving point of said parallelogram linkage and at the opposite end thereof to said second leg of said bell crank.
Claim 9
Dependent Claim
44 words
Radio tuner apparatus as claimed in claim 5 wherein said arm member comprises a scotch yoke having a first end thereof coupled pivotally to the driving point of said parallel linkage assembly, and being coupled also to the second leg of said bell crAnk.
Claim 10
Dependent Claim
265 words
Pointer driver apparatus for use in a radio receiver including manually operable tuner control means, variable frequency tuning means coupled to said manually operable tuner control means for movement thereby along a predetermined path to adjust the frequency setting thereof, a dial scale and pointer movable along a predetermined path adjacent said dial scale to indicate visually the frequency to which said variable frequency tuning means is set, said pointer driver apparatus including in combination; a parallelogram linkage assembly comprising first means defining a first parallelogram having arms of a predetermined length and second means defining a second parallelogram having arms of a second predetermined length, shorter than the arms of said first parallelogram, at least one of the arms of said second parallelogram being coextensive with an arm of said first parallelogram and being formed from a portion thereof, the arms of said parallelogram linkage assembly being pivotally interconnected, a first point of interconnection of a pair of arms defining said second parallelogram providing a driving point and a second point of interconnection of corresponding arms defining said first parallelogram providing a driven point, the driven point being movable in accordance with the movement of said driving point, said movement being magnified by the ratio of the length of an arm of said first parallelogram with respect to the length of an arm of said second parallelogram, said pointer being connected at said driven point and said variable frequency tuning means being operatively coupled to said driving point, whereby upon movement of the latter said pointer is moved with respect to said dial scale.
Claim 11
Dependent Claim
265 words
Pointer driver apparatus for use in a radio receiver including manually operable tuner control means, variable frequency tuning means coupled to said manually operable tuner control means for movement thereby along a predetermined path to adjust the frequency setting thereof, a dial scale and pointer movable along a predetermined path adjacent said dial scale to indicate visually the frequency to which said variable frequency tuning means is set, said pointer driver apparatus including in combination; a parallelogram linkage assembly comprising first means defining a first parallelogram having arms of a predetermined length and second means defining a second parallelogram having arms of a second predetermined length, shorter than the arms of said first parallelogram, at least one of the arms of said second parallelogram being coextensive with an arm of said first parallelogram and being formed from a portion thereof, the arms of said parallelogram linkage assembly being pivotally interconnected, a first point of interconnection of a pair of arms defining said second parallelogram providing a driving point and a second point of interconnection of corresponding arms defining said first parallelogram providing a driven point, the driven point being movable in accordance with the movement of said driving point, said movement being magnified by the ratio of the length of an arm of said first parallelogram with respect to the length of an arm of said second parallelogram, said pointer being connected at said driven point and said variable frequency tuning means being operatively coupled to said driving point, whereby upon movement of the latter said pointer is moved with respect to said dial scale.
Claim 12
Dependent Claim
72 words
Pointer driver apparatus as claimed in claim 9 further including bell crank means mounted for pivotal movement, a first leg of said bell crank means being coupled to said variable frequency tuning means and the second leg thereof being coupled to said parallelogram linkage for operatively moving said driving point in response to the movement of said variable frequency tuning means, thereby to drive said pointer with respect to said dial scale.
Claim 13
Dependent Claim
45 words
Pointer driver apparatus as claimed in claim 10 further including an arm member interposed between said parallelogram linkage and said bell crank for translating the rotational movement of said bell crank into corresponding movement for driving said pointer along said path adjacent said dial scale.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |