US2281468A - Wireless receiver - Google Patents

Wireless receiver Download PDF

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Publication number
US2281468A
US2281468A US285896A US28589639A US2281468A US 2281468 A US2281468 A US 2281468A US 285896 A US285896 A US 285896A US 28589639 A US28589639 A US 28589639A US 2281468 A US2281468 A US 2281468A
Authority
US
United States
Prior art keywords
discs
shaft
disc
diaphragms
tuning
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US285896A
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English (en)
Inventor
Johannes Antonius Van Lammeren
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RCA Corp
Original Assignee
RCA Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by RCA Corp filed Critical RCA Corp
Application granted granted Critical
Publication of US2281468A publication Critical patent/US2281468A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/14—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings operated by auxiliary power
    • H03J5/146—Settings desired by a switch controlled together with the tuning member and which stops the control as soon as a desired position is reached
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J5/00—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner
    • H03J5/02—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings
    • H03J5/14—Discontinuous tuning; Selecting predetermined frequencies; Selecting frequency bands with or without continuous tuning in one or more of the bands, e.g. push-button tuning, turret tuner with variable tuning element having a number of predetermined settings and adjustable to a desired one of these settings operated by auxiliary power
    • H03J5/16—Settings determined by a number of separate positioning means actuated by hand
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2101—Cams
    • Y10T74/2102—Adjustable

Definitions

  • Patented Apr. 28, 1942 2,281,468 A wlRELEss RECEIVER' Johannes Antonius van Lammeren, Eindhoven, Netherlands, assignor, by mesne assignments, to Radio Corporation of America., New York, N. Y., a corporation of Delaware 4 Application July 22, 1939, Serial No. 285,896 In the Netherlands July 23, 1938 3 Claims.
  • Wireless receivers capable of being automatically tuned to a number of predetermined stations by means of a station selector constituted by a dial, a key-board or similar device in which a position disc mounted on a shaft to rotate with friction is provided for each of said stations are known per se.
  • said position disc generally exhibits at its circumference a change in profile by which a member associated with the disc concerned is governed, said member operating the motor which actuates the tuning means, such as the tuning condensers.
  • the stopping time of this motor is thus determined by the position of the said change in prole.
  • This position relatively to the shaft can be altered by rotation of a position-disc relatively to the shaft, which therefore has the result that if by operating a station selector, such as a press-button, tuning toa given station were automatically effected originally, operating the same station-selector after rotation of the position disc on its shaft has the effect of tuning to another transmitter.
  • a station selector such as a press-button
  • tuning toa given station were automatically effected originally, operating the same station-selector after rotation of the position disc on its shaft has the effect of tuning to another transmitter.
  • 'I'he adjustability of the position-discs is important for the user of the set.
  • the adjustment of one of the position-discs should, however, not have the effect of altering the adjustment of the other position-discs since the possibility of correct automatic tuning of the other stations would naturally be imperilled thereby. Unless they are very complicated the constructions already known are not sufhciently proof against this.
  • the arrangement according to the invention allows by simple means to ensure that altering the position of one of the position-discs has not the effect of altering in any way the adjustment of the other position discs relatively to the shaft on which they are mounted.
  • the wireless set according to the invention is characterized in that all of the position-discs are axially forced against a stop by one common spring, the discs of each pair of discs having arranged between them a 4plate which cannot be rotated relatively to the shaft, said plates being capable of transmitting axial pressure between the two adjoining discs. 'I'he axial pressure which is exerted by the common spring brings about between all the plates and intermediate discs a normal pressure which, when normally the shaft on which the plates and discs are mounted rotates, is high enough for all the plates and discs to follow integrally the rotation of the shaft.
  • each of the plates arranged between the position discs is furnished with a key fitting into a key-track on the shaft and this ensures that the various plates cannot be rotated.
  • the discs have arranged between them diaphragms which are resilient axially and which have their central part secured to the shaft.
  • the central parts of these diaphragms are clamped between the end surface of a number of sleeves pushed on the shaft and clamped together.
  • Fig. 1 illustrates an embodiment of the invention using keyed disks
  • Fig. 2 illustrates another embodiment of the invention using clamped resilient disks
  • Fig. 3 is a plan view of one of the disks shown in Fig. 2.
  • Fig. 1 shows one form of construction in which a shaft I carries four position discs 2, 3, 4 and 5. These position discs are engaged by feeders 6, 1, 8
  • a rotatable control shaft In a shaft adjusting instrumentality, a rotatable control shaft. a series of substantially similar sleeve members mounted over said shaft in spaced axial relation, a plurality of control I carries a pinion 24 which engages a gear wheel 25 which in turn is mounted on the rotor shaft 26 of the tuning condenser. v
  • the condenser can be driven manually by coupling, for example, to the motor shaft a gear wheel which is mounted on the shaft of a tuning knob.
  • similar parts are designated by like reference numerals.
  • They have their central part clamped between sleeves 2l and their parts arranged outwardly to a further extent are located between the position-disc III, II, I2 and I3. This also permits of giving one of the position-discs a different position relatively to the shaft I without the other position-discs losing their original position.
  • Fig. 3 is a front elevation of suena diaphragm.
  • clamping means for clamping said sleeve members and said diaphragms to the control shaft whereby said shaft, sleeve members, and diaphragms rotate as a unit upon rotation of said shaft.
  • said diaphragms being extended radially so as toact as spacers between adjacent cam'discs, and resilient means for resiliently clamping together said spacing diaphragms and cam discs.
  • cam discs comprise I-section discs whereby each of said cam discs comprises, in effect, a disc provided with two opposltely extending flanges, each disc having a thickness along that portion which includes its two flanges which is substantially the same as the lengthof the sleeve member associated therewith ,whereby said cam discs are in contact with the associated diaphragms only in the vicinity of the periphery thereof.
  • each of said diaphragms is formed as a thin disc having a plurality of substantially coaxial slits for increasing the axial resilience of the diaphragms.

Landscapes

  • Mechanical Operated Clutches (AREA)
  • Selective Calling Equipment (AREA)
  • Push-Button Switches (AREA)
  • Mechanical Control Devices (AREA)
US285896A 1938-07-23 1939-07-22 Wireless receiver Expired - Lifetime US2281468A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL52543T 1938-07-23

Publications (1)

Publication Number Publication Date
US2281468A true US2281468A (en) 1942-04-28

Family

ID=19778896

Family Applications (1)

Application Number Title Priority Date Filing Date
US285896A Expired - Lifetime US2281468A (en) 1938-07-23 1939-07-22 Wireless receiver

Country Status (8)

Country Link
US (1) US2281468A (enrdf_load_stackoverflow)
BE (1) BE435603A (enrdf_load_stackoverflow)
CH (1) CH212537A (enrdf_load_stackoverflow)
DE (1) DE741790C (enrdf_load_stackoverflow)
DK (1) DK58206C (enrdf_load_stackoverflow)
FR (1) FR858202A (enrdf_load_stackoverflow)
GB (1) GB531405A (enrdf_load_stackoverflow)
NL (1) NL52543C (enrdf_load_stackoverflow)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455876A (en) * 1944-05-26 1948-12-07 Niles Bement Pond Co Machine tool
US2496453A (en) * 1943-12-16 1950-02-07 Harold F Elliott Control apparatus
US2544089A (en) * 1945-01-09 1951-03-06 Horgan William Francis Means for operating control elecments, such as electric switches, in a selected manner
US2771250A (en) * 1953-06-09 1956-11-20 Collins Radio Co Corrector unit for a coil winding machine
US2872839A (en) * 1955-05-19 1959-02-10 Gorden W Valentine Anti-freeze washer which is readily separable by cutting to relieve a threaded joint
US3170330A (en) * 1960-01-19 1965-02-23 Febco Inc Timing controller
US3251242A (en) * 1962-09-05 1966-05-17 Borletti Spa Cams and supports thereof
US5109727A (en) * 1991-02-28 1992-05-05 Eaton Corporation Rotary adjustment cam

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2044607A (en) * 1931-06-25 1936-06-16 Rca Corp Selector mechanism for automatic tuning

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496453A (en) * 1943-12-16 1950-02-07 Harold F Elliott Control apparatus
US2455876A (en) * 1944-05-26 1948-12-07 Niles Bement Pond Co Machine tool
US2544089A (en) * 1945-01-09 1951-03-06 Horgan William Francis Means for operating control elecments, such as electric switches, in a selected manner
US2771250A (en) * 1953-06-09 1956-11-20 Collins Radio Co Corrector unit for a coil winding machine
US2872839A (en) * 1955-05-19 1959-02-10 Gorden W Valentine Anti-freeze washer which is readily separable by cutting to relieve a threaded joint
US3170330A (en) * 1960-01-19 1965-02-23 Febco Inc Timing controller
US3251242A (en) * 1962-09-05 1966-05-17 Borletti Spa Cams and supports thereof
US5109727A (en) * 1991-02-28 1992-05-05 Eaton Corporation Rotary adjustment cam

Also Published As

Publication number Publication date
BE435603A (enrdf_load_stackoverflow)
CH212537A (de) 1940-11-30
GB531405A (en) 1941-01-03
NL52543C (enrdf_load_stackoverflow) 1941-05-05
DE741790C (de) 1943-11-17
DK58206C (da) 1940-12-02
FR858202A (fr) 1940-11-20

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