US3842683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Uhf tuner arrangement
Assignee: Sarkes Tarzian Inc
•
Filing: 1973-04-13
•
Granted: 1974-10-22
•
Expires: 1993-04-13
Abstract
Abstract A continuously variable UHF tuner arrangement is provided wherein a single channel selector shaft is provided with a detent position for each of the seventy UHF television stations and a highly accurate detent mechanism is employed to return the channel selector shaft to any one of said detent positions with extreme accuracy. As a result, the tuning elements of the UHF tuner may be accurately aligned to different UHF stations corresponding to said detent positions and a nonambiguous digital dial arrangement is employed to indicate to the operator exactly which UHF station is being received. The touch, detent spacing and location of the channel selector knob and concentric fine tuning knob are comparable with conventional VHF tuners. Also, a stop is provided at each end of travel of the selector shaft which positively prevents the display of channel numbers within the dial viewing area which are not assigned to the UHF television band. Facilities are provided in such a UHF tuning arrangement for disabling an associated AFC control circuit during periods when the selector shaft is moved between said detent positions and during periods when a fine tuning adjustment is being made.
Inventors
- 👤 A Valdettaro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:37
CPC Classifications
H; H03; H03J; H03J1/00; H03J1/06; H03J1/14; H03J1/02; H03J1/04; H03J1/045
Claims Analysis
Total Claims: 49
Claim 1
Independent Claim
181 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all television stations in the UHF television band, a selector shaft, a detent wheel secured to said selector shaft and having ten indentations in the periphery thereof, spring biased detent means adapted to engage the indentations of said wheel as said selector shaft is rotated, thereby to establish ten different equally spaced detent positions for said selector shaft a units dial member mounted on and rotatable with said selector shaft, a tens dial member concentric with said selector shaft, means interconnecting said tens and units dial members so that said tens dial member is changed one tens digit position for each rotation of said units dial member, gear means interconnecting said selector shaft and said main tuning shaft, and means for spring loading said gear means against said detent wheel so that the position of said main tuning shaft is precisely determined by said detent wheel for all of the UHF television stations in the UHF teLevision band.
Claim 2
Dependent Claim
181 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all television stations in the UHF television band, a selector shaft, a detent wheel secured to said selector shaft and having ten indentations in the periphery thereof, spring biased detent means adapted to engage the indentations of said wheel as said selector shaft is rotated, thereby to establish ten different equally spaced detent positions for said selector shaft a units dial member mounted on and rotatable with said selector shaft, a tens dial member concentric with said selector shaft, means interconnecting said tens and units dial members so that said tens dial member is changed one tens digit position for each rotation of said units dial member, gear means interconnecting said selector shaft and said main tuning shaft, and means for spring loading said gear means against said detent wheel so that the position of said main tuning shaft is precisely determined by said detent wheel for all of the UHF television stations in the UHF teLevision band.
Claim 3
Dependent Claim
149 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all television stations in the UHF television band, a selector shaft, a detent wheel secured to said selector shaft and having indentations in the periphery thereof, spring biased detent means adapted to engage the indentations of said wheel as said selector shaft is rotated, thereby to establish a plurality of equally spaced detent positions for said selector shaft, and means including a plurality of gears for connecting said selector shaft to said main tuning shaft, means connected to said main tuning shaft for exerting a biasing torque thereon, said plurality of gears being sufficiently loosely enmeshed and said biasing torque being of sufficient magnitude that the meshed teeth of said gears engage on only one face thereof for all different detent positions of said selector shaft.
Claim 4
Dependent Claim
149 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all television stations in the UHF television band, a selector shaft, a detent wheel secured to said selector shaft and having indentations in the periphery thereof, spring biased detent means adapted to engage the indentations of said wheel as said selector shaft is rotated, thereby to establish a plurality of equally spaced detent positions for said selector shaft, and means including a plurality of gears for connecting said selector shaft to said main tuning shaft, means connected to said main tuning shaft for exerting a biasing torque thereon, said plurality of gears being sufficiently loosely enmeshed and said biasing torque being of sufficient magnitude that the meshed teeth of said gears engage on only one face thereof for all different detent positions of said selector shaft.
Claim 5
Dependent Claim
165 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all television stations in the UHF television band, a selector shaft, a detent wheel secured to said selector shaft and having indentations in the periphery thereof, spring biased detent means adapted to engage the indentations of said wheel as said selector shaft is rotated, thereby to establish a plurality of equally spaced detent positions for said selector shaft, and means including a plurality of gears for connecting said selector shaft to said main tuning shaft, means connected to said main tuning shaft for exerting a biasing torque thereon, said plurality of gears being sufficiently loosely enmeshed and said biasing torque being of sufficient magnitude that said selector shaft may be rotated in either direction to reach different detent positions thereof and the meshed teeth of said gears are engaged on only one face thereof at each detent position of said selector shaft.
Claim 6
Dependent Claim
165 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all television stations in the UHF television band, a selector shaft, a detent wheel secured to said selector shaft and having indentations in the periphery thereof, spring biased detent means adapted to engage the indentations of said wheel as said selector shaft is rotated, thereby to establish a plurality of equally spaced detent positions for said selector shaft, and means including a plurality of gears for connecting said selector shaft to said main tuning shaft, means connected to said main tuning shaft for exerting a biasing torque thereon, said plurality of gears being sufficiently loosely enmeshed and said biasing torque being of sufficient magnitude that said selector shaft may be rotated in either direction to reach different detent positions thereof and the meshed teeth of said gears are engaged on only one face thereof at each detent position of said selector shaft.
Claim 7
Dependent Claim
59 words
The combination of claim 2, wherein said plurality of gears have a substantial step-down ratio between said selector shaft and said main tuning shaft so that the accuracy of positioning of said selector shaft by said detent means is multiplied by said ratio in precisely positioning said main tuning shaft to different television stations in the UHF television band.
Claim 8
Dependent Claim
14 words
The combination of claim 4, wherein said step-down ratio is approximately 14 to 1.
Claim 9
Dependent Claim
69 words
The combination of claim 1, wherein there is provided means defining a viewing area in which one number of each of said tends and units dial members is visible, and means connected to said selector shaft and providing a stop at each end of travel of said selector shaft which positively prevents the display of numbers within said viewing area which are not assigned to the UHF television band.
Claim 10
Dependent Claim
34 words
The combination of claim 2, wherein said detent wheel has ten equally spaced indentations so that said selector shaft is indexed to successive group of 10 different UHF television stations for each revolution thereof.
Claim 11
Dependent Claim
144 words
The combination of, a UHF tuner having a plurality of groups of tuning elements connected to a common rotatable main tuning shaft, a control shaft, gear means interconnecting said control shaft and said main tuning shaft, detent means for said control shaft to establish a stop position of said main tuning shaft for each of the seventy television stations in the UHF band, dial indicator means connected to said control shaft and arranged to provide an exact digital indication of the UHF channel number corresponding to each one of said stop positions of said main tuning shaft, said tuning elements of said UHF tuner being aligned to receive the corresponding UHF station at each of said stop positions of said main tuning shaft with a maximum error of approximately three megacycles, whereby the channel number indicated by said dial indicator means is essentially nonambiguous.
Claim 12
Dependent Claim
144 words
The combination of, a UHF tuner having a plurality of groups of tuning elements connected to a common rotatable main tuning shaft, a control shaft, gear means interconnecting said control shaft and said main tuning shaft, detent means for said control shaft to establish a stop position of said main tuning shaft for each of the seventy television stations in the UHF band, dial indicator means connected to said control shaft and arranged to provide an exact digital indication of the UHF channel number corresponding to each one of said stop positions of said main tuning shaft, said tuning elements of said UHF tuner being aligned to receive the corresponding UHF station at each of said stop positions of said main tuning shaft with a maximum error of approximately three megacycles, whereby the channel number indicated by said dial indicator means is essentially nonambiguous.
Claim 13
Dependent Claim
34 words
The combination of claim 8, wherein said detent means is operative to return said main tuning shaft to any one of said 70 stop positions with a maximum reset error of approximately 200 kilocycles.
Claim 14
Dependent Claim
185 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all stations in the UHF television band, a station selector shaft, gear means interconnecting said selector shaft and said main tuning shaft, detent means for said selector shaft to establish a stop position of said main tuning shaft for each of the 70 television stations in the UHF band, a fine tuning shaft positioned inside of said selector shaft, means connected to said fine tuning shaft for effecting a fine tuning operation on said main tuning shaft at each of said stop positions of said main tuning shaft in response to rotation of said fine tuning shaft, a fine tuning control knob connected to said fine tuning shaft and having a plurality of arcuate openings therein, a channel selector knob positioned concentrically with said fine tuning knob, and means connecting said channel selector knob with said selector shaft through said arcuate openings in said fine tuning knob, thereby to permit limited rotation of said fine tuning shaft relative to said selector shaft.
Claim 15
Dependent Claim
185 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all stations in the UHF television band, a station selector shaft, gear means interconnecting said selector shaft and said main tuning shaft, detent means for said selector shaft to establish a stop position of said main tuning shaft for each of the 70 television stations in the UHF band, a fine tuning shaft positioned inside of said selector shaft, means connected to said fine tuning shaft for effecting a fine tuning operation on said main tuning shaft at each of said stop positions of said main tuning shaft in response to rotation of said fine tuning shaft, a fine tuning control knob connected to said fine tuning shaft and having a plurality of arcuate openings therein, a channel selector knob positioned concentrically with said fine tuning knob, and means connecting said channel selector knob with said selector shaft through said arcuate openings in said fine tuning knob, thereby to permit limited rotation of said fine tuning shaft relative to said selector shaft.
Claim 16
Dependent Claim
29 words
The combination of claim 10, wherein said channel selector knob is connected to said selector shaft by means of a plurality of pins which extend through said arcuate openings.
Claim 17
Dependent Claim
63 words
The combination of claim 10, wherein a member is secured to the end of said channel selector shaft and is provided with a plurality of apertures in alignment with said arcuate openings in said fine tuning knob, and a plurality of connecting members are secured to said channel selector knob and positioned in said apertures, said connecting members extending through said arcuate openings.
Claim 18
Dependent Claim
25 words
The combination of claim 12, wherein said member has a radially outwardly extending portion carrying numbers corresponding to the units digits of different UHF stations.
Claim 19
Dependent Claim
198 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all stations in the UHF television band, a station selector shaft, gear means interconnecting said selector shaft and said main tuning shaft, detent means for said selector shaft to establish a stop position of said main tuning shaft for each of the 70 television stations in the UHF band, a fine tuning shaft positioned inside of said selector shaft, means connected to said fine tuning shaft for effecting a fine tuning operation at each of said stop positions of said main tuning shaft in response to rotation of said fine tuning shaft, said selector shaft having a slot therein extending transversely of the longitudinal axis thereof, a pin connected to said fine tuning shaft and extending through said slot in said selector shaft, and a shaft extension member positioned around said selector shaft and having means interconnecting with said pin so that rotation of said shaft extension member is effective to rotate said fine tuning shaft, rotation of said fine tuning shaft being independent of said selector shaft while said pin moves within said slot.
Claim 20
Dependent Claim
198 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all stations in the UHF television band, a station selector shaft, gear means interconnecting said selector shaft and said main tuning shaft, detent means for said selector shaft to establish a stop position of said main tuning shaft for each of the 70 television stations in the UHF band, a fine tuning shaft positioned inside of said selector shaft, means connected to said fine tuning shaft for effecting a fine tuning operation at each of said stop positions of said main tuning shaft in response to rotation of said fine tuning shaft, said selector shaft having a slot therein extending transversely of the longitudinal axis thereof, a pin connected to said fine tuning shaft and extending through said slot in said selector shaft, and a shaft extension member positioned around said selector shaft and having means interconnecting with said pin so that rotation of said shaft extension member is effective to rotate said fine tuning shaft, rotation of said fine tuning shaft being independent of said selector shaft while said pin moves within said slot.
Claim 21
Dependent Claim
35 words
The combination of claim 14, wherein said shaft extension member is provided with a longitudinally extending slot in one end thereof adapted to receive said pin, whereby said shaft extension member may be readily removed.
Claim 22
Dependent Claim
142 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all stations in the UHF television band, a station selector shaft, a fine tuning shaft positioned inside said selector shaft, a first gear secured to and rotatable with said fine tuning shaft, gear means interconnecting said first gear and said main tuning shaft, clutch means between said selector shaft and said first gear, and detEnt means for said selector shaft to establish a stop position of said main tuning shaft for each of the seventy television stations in the UHF band, said clutch means being effective to transmit motion of said selector shaft to different detent positions to said first gear while permitting slippage between said selector shaft and said first gear when said fine tuning shaft is rotated.
Claim 23
Dependent Claim
142 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all stations in the UHF television band, a station selector shaft, a fine tuning shaft positioned inside said selector shaft, a first gear secured to and rotatable with said fine tuning shaft, gear means interconnecting said first gear and said main tuning shaft, clutch means between said selector shaft and said first gear, and detEnt means for said selector shaft to establish a stop position of said main tuning shaft for each of the seventy television stations in the UHF band, said clutch means being effective to transmit motion of said selector shaft to different detent positions to said first gear while permitting slippage between said selector shaft and said first gear when said fine tuning shaft is rotated.
Claim 24
Dependent Claim
55 words
The combination of claim 16, wherein said clutch means includes a first annular surface integral with said fine tuning shaft, a second annular surface integral with said selector shaft, a friction member positioned between said first and second annular surfaces, and means biasing said annular surfaces into engagement with opposite sides of said friction member.
Claim 25
Dependent Claim
152 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all stations in the UHF television band, a station selector shaft, gear means interconnecting said selector shaft and said main tuning shaft, detent means for said selector shaft to establish a stop position of said main tuning shaft for each of the seventy television stations in the UHF band, a fine tuning shaft positioned inside of said selector shaft, said fine tuning shaft being normally biased to a forward position and being movable to a rear position, and means responsive to rotation of said fine tuning shaft while in said rear position for effecting a fine tuning operation at each of said stop positions of said main tuning shaft, said fine tuning shaft being disengaged from said selector shaft when said fine tuning shaft is in said forward position.
Claim 26
Dependent Claim
152 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all stations in the UHF television band, a station selector shaft, gear means interconnecting said selector shaft and said main tuning shaft, detent means for said selector shaft to establish a stop position of said main tuning shaft for each of the seventy television stations in the UHF band, a fine tuning shaft positioned inside of said selector shaft, said fine tuning shaft being normally biased to a forward position and being movable to a rear position, and means responsive to rotation of said fine tuning shaft while in said rear position for effecting a fine tuning operation at each of said stop positions of said main tuning shaft, said fine tuning shaft being disengaged from said selector shaft when said fine tuning shaft is in said forward position.
Claim 27
Dependent Claim
74 words
The combination of claim 18, wherein there is provided a planetary gear system interconnecting said fine tuning shaft and said gear means, said system comprising a sun gear connected to said fine tuning shaft and a group of planetary gears connected to and rotatable with one of the gears of said gear means, said sun gear being out of engagement with said planetary gears when said fine tuning shaft is in said forward position.
Claim 28
Dependent Claim
198 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all television stations in the UHF television band, a selector shaft, a detent wheel secured to said selector shaft and having 10 indentations in the periphery thereof, spring biased detent means adapted to engage the indentations of said wheel as said selector shaft is rotated, thereby to establish ten different equally spaced detent positions for said selector shaft, a fine tuning shaft positioned inside said selector shaft, a first gear secured to and rotatable with said fine tuning shaft, means including gear means for interconnecting said first gear and said main tuning shaft, clutch means between said selector shaft and said first gear which is effective to transmit motion of said selector shaft to said first gear while permitting slippage between said selector shaft and said first gear when said fine tuning shaft is rotated, said first gear and said gear means providing a sufficiently large step-down ratio between said selector shaft and said main tuning shaft that rotation of said fine tuning shaft produces an acceptable fine tuning speed of said main tuning shaft.
Claim 29
Dependent Claim
198 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all television stations in the UHF television band, a selector shaft, a detent wheel secured to said selector shaft and having 10 indentations in the periphery thereof, spring biased detent means adapted to engage the indentations of said wheel as said selector shaft is rotated, thereby to establish ten different equally spaced detent positions for said selector shaft, a fine tuning shaft positioned inside said selector shaft, a first gear secured to and rotatable with said fine tuning shaft, means including gear means for interconnecting said first gear and said main tuning shaft, clutch means between said selector shaft and said first gear which is effective to transmit motion of said selector shaft to said first gear while permitting slippage between said selector shaft and said first gear when said fine tuning shaft is rotated, said first gear and said gear means providing a sufficiently large step-down ratio between said selector shaft and said main tuning shaft that rotation of said fine tuning shaft produces an acceptable fine tuning speed of said main tuning shaft.
Claim 30
Dependent Claim
14 words
The combination of claim 20, wherein said step-down ratio is approximately 14 to 1.
Claim 31
Dependent Claim
31 words
The combination of claim 20, wherein said step-down ratio is such that said fine tuning shaft moves at a rate at which approximately seven revolutions thereof covers the entire UHF band.
Claim 32
Dependent Claim
73 words
The combination of claim 1, wherein said interconnecting means comprises a rotatably mounted tripper pinion having teeth in engagement with corresponding teeth on said tens dial member so that rotation of said pinion causes a predetermined movement of said tens dial member, and means carried by said selector shaft and adapted to engage said pinion once each revoLution of said selector shaft, thereby to produce said predetermined movement of said tens dial member.
Claim 33
Dependent Claim
189 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all television stations in the UHF television band, a selector shaft, a detent wheel secured to said selector shaft and having ten indentations in the periphery thereof, spring biased detent means adapted to engage the indentations of said wheel as said selector shaft is rotated, thereby to establish ten different equally spaced detent positions for said selector shaft, gear means interconnecting said selector shaft and said main tuning shaft, means for spring loading said gear means against said detent wheel so that the position of said main tuning shaft is precisely determined by said detent wheel for all of the UHF television stations in the UHF television band, a toothed member concentric with said selector shaft, a tripper pinion having teeth in engagement with said toothed member, and means carried by said selector shaft and adapted to engage and move said pinion once each revolution of said selector shaft so that said toothed member is rotated a predetermined increment once each revolution of said selector shaft.
Claim 34
Dependent Claim
189 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all television stations in the UHF television band, a selector shaft, a detent wheel secured to said selector shaft and having ten indentations in the periphery thereof, spring biased detent means adapted to engage the indentations of said wheel as said selector shaft is rotated, thereby to establish ten different equally spaced detent positions for said selector shaft, gear means interconnecting said selector shaft and said main tuning shaft, means for spring loading said gear means against said detent wheel so that the position of said main tuning shaft is precisely determined by said detent wheel for all of the UHF television stations in the UHF television band, a toothed member concentric with said selector shaft, a tripper pinion having teeth in engagement with said toothed member, and means carried by said selector shaft and adapted to engage and move said pinion once each revolution of said selector shaft so that said toothed member is rotated a predetermined increment once each revolution of said selector shaft.
Claim 35
Dependent Claim
23 words
The combination of claim 24, wherein said tripper pinion is mounted on a shaft positioned parallel to said selector shaft and offset therefrom.
Claim 36
Dependent Claim
18 words
The combination of claim 25, wherein said shaft is fixed, and said tripper pinion is rotatably mounted thereon.
Claim 37
Dependent Claim
208 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all television stations in the UHF television band, a selector shaft, a detent wheel secured to said selector shaft and having ten indentations in the periphery thereof, spring biased detent means adapted to engage the indentations of said wheel as said selector shaft is rotated, thereby to establish ten different equally spaced detent positions for said selector shaft, a fine tuning shaft positioned inside said selector shaft, a first gear secured to and rotatable with said fine tuning shaft, means including gear means for interconnecting said first gear and said main tuning shaft, slip clutch means interconnecting said selector shaft and said first gear, a member concentric with said selector shaft, means connected to said selector shaft for rotating said member a predetermined increment for each revolution of said selector shaft, whereby said selector shaft may be utilized to drive a units dial having ten equally spaced units digit positions and said member may be utilized to drive a tens dial having tens digit positions spaced apart by said predetermined increments and corresponding to the tens digits of television channels in said UHF television band.
Claim 38
Dependent Claim
208 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all television stations in the UHF television band, a selector shaft, a detent wheel secured to said selector shaft and having ten indentations in the periphery thereof, spring biased detent means adapted to engage the indentations of said wheel as said selector shaft is rotated, thereby to establish ten different equally spaced detent positions for said selector shaft, a fine tuning shaft positioned inside said selector shaft, a first gear secured to and rotatable with said fine tuning shaft, means including gear means for interconnecting said first gear and said main tuning shaft, slip clutch means interconnecting said selector shaft and said first gear, a member concentric with said selector shaft, means connected to said selector shaft for rotating said member a predetermined increment for each revolution of said selector shaft, whereby said selector shaft may be utilized to drive a units dial having ten equally spaced units digit positions and said member may be utilized to drive a tens dial having tens digit positions spaced apart by said predetermined increments and corresponding to the tens digits of television channels in said UHF television band.
Claim 39
Dependent Claim
42 words
The combination of claim 2, wherein said biasing means comprises a multi-turn coil spring coaxial with said main tuning shaft, one end of said spring being connected to a fixed point and the other end being connected to said main tuning shaft
Claim 40
Dependent Claim
25 words
The combination of claim 28, which includes means for adjusting the number of effective turns of said coil spring, thereby to adjust said biasing torque.
Claim 41
Dependent Claim
49 words
The combination of claim 28, which includes means for spacing the turns of said coil spring away from the axis of said main tuning shaft by an amount sufficient to avoid undesired side thrust on said main tuning shaft as said selector shaft is rotated throughout the UHF band.
Claim 42
Dependent Claim
194 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all television stations In the UHF television band, a selector shaft, a detent wheel secured to said selector shaft and having indentations in the periphery thereof, spring biased detent means adapted to engage the indentations of said wheel as said selector shaft is rotated, thereBy to establish different equally spaced detent positions for said selector shaft, a dial indicator driveshaft positioned perpendicular to said selector shaft, cooperating gear means on said selector shaft and said driveshaft for rotating said driveshaft in response to rotation of said selector shaft, dial indicator means connected to said driveshaft and arranged to provide an exact digital indication of the UHF channel number corresponding to each of the 70 stations in the UHF band, gear means interconnecting said selector shaft and said main tuning shaft, and means for spring loading said last-named gear means against said detent wheel so that the position of said main tuning shaft is precisely determined by said detent wheel for all of the UHF television stations in the UHF television band.
Claim 43
Dependent Claim
194 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all television stations In the UHF television band, a selector shaft, a detent wheel secured to said selector shaft and having indentations in the periphery thereof, spring biased detent means adapted to engage the indentations of said wheel as said selector shaft is rotated, thereBy to establish different equally spaced detent positions for said selector shaft, a dial indicator driveshaft positioned perpendicular to said selector shaft, cooperating gear means on said selector shaft and said driveshaft for rotating said driveshaft in response to rotation of said selector shaft, dial indicator means connected to said driveshaft and arranged to provide an exact digital indication of the UHF channel number corresponding to each of the 70 stations in the UHF band, gear means interconnecting said selector shaft and said main tuning shaft, and means for spring loading said last-named gear means against said detent wheel so that the position of said main tuning shaft is precisely determined by said detent wheel for all of the UHF television stations in the UHF television band.
Claim 44
Dependent Claim
54 words
The combination of claim 31, which includes a units dial member connected to said driveshaft, a tens dial member rotatably mounted concentrically with said driveshaft, and trip pinion means interconnecting said tens and units dial members so that said tens dial member is moved one tens digit increment for each rotation of said driveshaft.
Claim 45
Dependent Claim
52 words
The combination of claim 32, wherein said last named means includes a trip pinion having teeth in engagement with corresponding teeth on said tens dial member, and means on said driveshaft and adapted to engage said trip pinion once each revolution, thereby to move said tens dial member said tens digit increment.
Claim 46
Dependent Claim
172 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all stations in the UHF television band, a station selector shaft, gear means interconnecting said selector shaft and said main tuning shaft, detent means for said selector shaft to establish a stop position of said main tuning shaft for each of the seventy television stations in the UHF band, a fine tuning shaft positioned inside of said selector shaft, means connected to said fine tuning shaft for effecting a fine tuning operation at each of said stop positions of said main tuning shaft in response to rotation of said fine tuning shaft, a fine tuning shaft extension member positioned around the outer end portion of said selector shaft, and means interconnecting said fine tuning shaft extension member and said fine tuning shaft so that rotation of said shaft extension member is effective to rotate said fine tuning shaft over a limited sector of rotation independently of said selector shaft.
Claim 47
Dependent Claim
172 words
The combination of, a UHF tuner having a continuously variable main tuning shaft rotation of which is effective selectively to receive signals from all stations in the UHF television band, a station selector shaft, gear means interconnecting said selector shaft and said main tuning shaft, detent means for said selector shaft to establish a stop position of said main tuning shaft for each of the seventy television stations in the UHF band, a fine tuning shaft positioned inside of said selector shaft, means connected to said fine tuning shaft for effecting a fine tuning operation at each of said stop positions of said main tuning shaft in response to rotation of said fine tuning shaft, a fine tuning shaft extension member positioned around the outer end portion of said selector shaft, and means interconnecting said fine tuning shaft extension member and said fine tuning shaft so that rotation of said shaft extension member is effective to rotate said fine tuning shaft over a limited sector of rotation independently of said selector shaft.
Claim 48
Dependent Claim
40 words
The combination of claim 34, wherein said outer end portion of said selector shaft is of reduced diameter and said fine tuning shaft extension member includes a portion closely surrounding said end portion of reduced diameter of said selector shaft.
Claim 49
Dependent Claim
47 words
The combination of claim 34, wherein said interconnecting means includes interfitting means on said fine tuning shaft and said fine tuning shaft extension member arranged so that said shaft extension member may be readily removed by moving the same outwardly along the axis of said selector shaft.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |