US1850858A - Signaling system - Google Patents

Signaling system Download PDF

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Publication number
US1850858A
US1850858A US291268A US29126828A US1850858A US 1850858 A US1850858 A US 1850858A US 291268 A US291268 A US 291268A US 29126828 A US29126828 A US 29126828A US 1850858 A US1850858 A US 1850858A
Authority
US
United States
Prior art keywords
coil
discharge devices
devices
plates
housing
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
US291268A
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English (en)
Inventor
Irvin R Weir
Lycurgus W Richardson
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.)
General Electric Co
Original Assignee
General Electric Co
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
Priority to NL29397D priority Critical patent/NL29397C/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US291268A priority patent/US1850858A/en
Priority to GB20174/29A priority patent/GB315219A/en
Priority to FR678056D priority patent/FR678056A/fr
Priority to US491990A priority patent/US1854008A/en
Priority to FR40780D priority patent/FR40780E/fr
Application granted granted Critical
Publication of US1850858A publication Critical patent/US1850858A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F1/00—Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements
    • H03F1/08—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements
    • H03F1/14—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of neutralising means
    • H03F1/16—Modifications of amplifiers to reduce detrimental influences of internal impedances of amplifying elements by use of neutralising means in discharge-tube amplifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02—Transmitters
    • H04B1/03—Constructional details, e.g. casings, housings
    • H04B1/036—Cooling arrangements

Definitions

  • Our invention relates to high frequency signaling systems and especially to high frequency systems for operation at short wave lengths. Still more particularly our invention relates to amplifiers which are adapted for use in systems for the transmission of lar e amounts of power at short wave lengths and it deals more specifically with the mechanical construction and assembly of the apparatus comprising the amplifier circuit.
  • Our invention relates more particularly to the mechanical structure and arrangement of a power amplifier of the push pull type and it has for one of its purposes to provide an amplifier of the type indicated in which the efiect of stray capacity and inductance is reduced to an extent which is believed not heretofore to have been attained.
  • a further purpose of our invention is to provide an amplifier of the type indicated which is characterized by compactness of the amplifier unit to an extent which in a large measure eliminates connecting leads between the various circuit components.
  • Still a further purpose of our invention is to provide means whereby variations in the constants of certain elements of the circuit will not afiect the constants of other elements.
  • Our invention relates further to the structure of the inductance coil which may be utilized as the input coil for an amplifier of the type indicated and which possesses advantages both within itself and in connection with a system of the type to be described.
  • 1 and 2 represent electron discharge devices which are employed in the amplifier to be described. These devices may be of any suitable construction well-l nown in the art. The lower portion of these devices comprising tne anode, is surrounded by suitable water cooling jackets 3 and 4 respectively. These discharge devices are arranged upon opposite sides of the center of the interior of the conducting housing 6 in w iich our apparatus is enclosed and are arranged symmetrically with respect to the side walls thereof. Located between the discharge devices is an input inductance coil 5 which is supported in suitable manner as from the top of the housing 6 by members 6. Upon opposite sides of the coil 5 are contact members 7 and 8 which are connected to the grids of each of the discharge devices by means of conductors 9 and 10.
  • This inductance coil is of high current carrying capacity and preferably is comprised of water cooled conducting tubing having opposite terminals thereof'connected to the water cooling jackets 3 and 4 of. the discharge devices 1 and 2 through suitable conducting water connections 12 and 13. Since the anodes of the discharge devices 1 and 2 which comprise cylindrical members 16, as shown in Fig. 3 and which are arranged within the water jackets 3, or 4;, are electrically connected to the water jacket, both through the water and at the point 17, it will be seen that these water cooling jackets and the conducting members which are connected thereto, including the coil 11, are all maintained at the potential of the anodes.
  • the water cooling circuit of the coil 11 extends from the input pipe 12 of the jacket 3 through the connections 14 and coil 11 to the output pipe 13 leading from the jacket 4.
  • the water cooling circuit of the discharge devices 1, of which there may be a plurality and which is similar to that of the discharge devices 2 is best shown in Fig. 2.
  • This cooling circuit is shown as extending through the input pipe 12 of the cooling ackets 3 and 4 in series to the output pipe 13. It will, of course, be understood that any suitable cooling system may be employed.
  • the plates 22 of the capacitor 20 are electrically connected by conductor 25 to the grid connection 9 of the electron discharge device 1, and the corresponding plates of the capacitor 21 are connected by means of conductor 26 to the grid connection 10 of the discharge device 2.
  • the purpose of the plates 18, as will later be indicated, is to provide a shield about the neutralizing capacitors which are included therebetween and accordingly the.
  • outer plate 18 is shaped to enclose the capacitor and further is extended about the water coolshafts 28 are adapted for rotation by any suitable means such as worm gears 29 and shaft 30 which are controlled from the front of the panel, which comprises one of the side walls of the housing 6.
  • a suitable source 32- of biasing potential for the grids of the electron discharge devices is connected between the housing 6 and the midpointof the coil 5 through which it is connected to the grids of the electron discharge devices 1' and 2.
  • the neutralizing capacitors 20 and 21 are connected by means including conductors 25 and 26, respectively between the anode of one of the discharge devices 1 and 2, and
  • plates 33 and 3-1 are provided. These plates are supported from, and are conductively connected to, the housing 6 by means of a shaft 35. This shaft is adapted for rotation by means of a shaft 36 which extends through the panel and which is connected by means of worm gears 37 to the shaft 35.
  • These plates have a large conducting surface and may be rotated into proximity with the plates 18, in which case, a large capacity will exist between the plates 18 and the conducting bodies 33 and 34. Likewise these plates may be rotated in the opposite direction until very small capacity exists between the plates 33 and 34 and the plates 18, in which case the length at which the output circuit is tuned to operate.
  • neutralizing capacitors mounted between the discharge devices and the iousing it will of course be understood that they may be mounted upon either side of the discharge devices. It is desirable however that they be mounted directly upon the water jackets and that the shielding plates 18 be utilized for the purpose stated.
  • the plates 18 and the structure enclosed thereby might be eliminated, the plates 33 and 34 then being adjustable between the water jackets of the electron discharge devices and the housing, or if no water jackets are employed then between the anodes or" the discharge devices themselves and he housing.
  • the external capacity existing between the anodes of the discharge devices and the cathodes and the range of frequencies over which the system is adapted to operate may be increased if one of the plates 18 be mounted against the side walls of the water jackets, or discharge devices and the plates 33 and 34 arranged for movement in proximity thereto.
  • an additional tuning means comprising a substantially circular member 38, such as an annular body, or disk, arranged for rotation within the coil 11, is
  • This member which may be comprised of any suitable conducting material, such as copper, or aluminum, is spaced from the coil 11 and has a diameter somewhat less than the inner diameter of the coil. In efiect it constitutes a short circuited turn mounted within the coil and as such it produces varying effects upon the coil in different positions in rotation. Thus the inductance of the coil may be varied by rotating this member. Of course the tuning effect of this member increases as the inductance of coil 11 decreases. Hence this member is a very desirable means for tuning purposes when the set is operated at short wave lengths as when a portion of each end of the coil is short circuited by the short circuiting switches 75 and 76. These switches are mounted in any suitable manner and are adapted by flexible leads to short circuit any desired portion of the coil. At the longer wave lengths these switches are opened and the necessary tuning within a desired range is effected by the plates 33 and 34.
  • any suitable conducting material such as copper, or aluminum
  • the plates 33 and 3st may be removed and the member 38 may be relied upon for the necessary tuning.
  • the input coil may be of a construction similar to the output coil shown.
  • FIG. a plan view of the apparatus partly in section is illustrated.
  • contacts 7 and 8 on the coil 5, which contacts are connected to the grids of devices 1 and 2 are located upon opposite sides of the coil midway of the length thereof, and also that these contacts are located about midway between the different devices 1 and 2.
  • the devices 1 and 2 are arranged in their water jackets in a manner such that the grid leads 9 and 10 project radi ally toward the contacts 7 and 8, such that these leads are all of about the same length, and, th refore, have about the same distrib uted inductance and capacity.
  • the discharge devices are also in proximity to the coil such that the leads 9 and are very short.
  • the coil 5 is of cylindrical construction having oppositely wound sections 39 and 4-0 extending from a conducting slip ring 41 arranged at the center of the coil. Extending axially within the coil is a shaft 4- having slip rings 43 and er arranged at the en d there of, conducting supports 45 and 46 arranged thereon and within the coil sections 39 and 40 respectively, and a control handle 47 connected to the end thereof, such that this shaft together with the supports and 46 may be rotatedv as desired.
  • the supporting members 45 and 46 are connected to the slip rings 43 and 44 respectively through conductors 48 and 49, these conductors being mounted for. rotation with the shaft and extending through a suitable insulating bushing 50.
  • the bushing 50 comprises a part of the mechanism whereby the shaft 42 is supported for rotation and has about it a. pair of suitable concentric bearing members 51 and 52 which are adapted for rotation with respect to each other.
  • the bearing member 52 is supported by an additional bearing member 53 which in turn is attached to the supporting member 6.
  • the shaft and the bearing members 51 and 52 are each rotatable with respect to the stationary bearing member 53 and the bearing members 51 and 52 are rotatable with respect to each other.
  • the outer end of the section 39 of the coil 5 is supported by means of insulators 54 by the bearing member 52.
  • the opposite end of the coil 5 is supported by means of insulators 55 which are securely attached to a bearing member 56.
  • This bearing member is concentric with the shaft 42 and arranged within a concentric stationary bearing member 57 which is supported from the members 6.
  • the bearing 56 has a handle 58 attached thereto and arranged on the front of the panel 59. By means of this handle the bearing members 56 and 52 may be rotated thereby causing the coil 5 to be rotated about the shaft42.
  • This handle may be retained in a stationary position by means of a suitable locking device such as member 60 which is mounted thereon and which is adapted frictionally to engage the panel 59.
  • each of the conducting supports 45 and 46 Arranged for slidable engagement with each of the conducting supports 45 and 46 are contacts 61 and 62, these contacts being securely attached to the supports and adapted for rotation with the shaft 42. These contacts have pair of prongs which project upon opposite sides and into engagement with one of the turns of the coil, such that as the shaft '42 is revolved the coil remaining stationary, each of the contacts 61 and 62 follows along the turn of the coil with which it is in engagement and is thereby caused to slide longitudinally of the supports 45 and 46. These contacts are spaced equally from the slip ring 41 and hence from the center of the coil, such that as the shaft 42 is revolved these contacts move in opposite directions, thereby producing equal changes in inductance between the center of the coil and the two contacts.
  • a brush 69 (Fig. 1).
  • This brush is connected to the negative side of the source of potential 32 by means of conductors not shown.
  • the handle 47 may be rotated, thereby causing the contacts 61 and 62 to move in'opposite directions along the coil. The handle 47 may then be locked by means of the locking device 7 0 to the handle 58.
  • the coil 5 and the shaft 42 carrying the contacts 61 and 62 may be rotated together, causing the contacts 65 and 66 to move in opposite directions along the coil, thereby to vary in equal amounts the inductance in the two grid circuits, as for tuning purposes without efiecting the'position of contacts 61 and 62 upon the coil.
  • the inductance between the grid contacts, and that between the transmission line contacts may be continuously varied over a broad range and that either of them may be varied independently of the other.
  • this coil comprises a compact unit which may be readily supported between the discharge devices and conveniently controlled from the front of the panel.
  • This coil possesses the further advantage. that variations in the connections thereto do not materially affect the distributed capacity existing between it and surrounding objects.
  • Vhile for tuning purposes additional capacity may be connected between contacts 7 and 8 at the higher frequencies the inductance coil may be made to resonate with the internal capacity of the discharge devices in the manner well-known in the art.
  • a high frequency transmitting system having a housing, a pair of electron discharge devices symmetrically arranged in space relation with reference to the side walls of said housing, means connecting said discharge devices in push-pull relation, a connection between the cathodes of said devices and this housing, and means for varying the frequency at which said system is adapted to operate comprising conducting bodies connected to the housing and movable in space between said discharge devices and the housing.
  • a high frequency transmitting system having a housing, a pair of electron discharge devices symmetrically arranged in space relation with reference to the side; walls of said housing, means connecting said discharge devices in push-pull relation including an output inductance coil having opposite points thereon connected to the anodes of said discharge devices, and means for varying the frequency at which said system is adapted to operate comprising a conducting body located between each of said devices and adjacent sidewalls of the housing and means connecting said conducting bodies whereby they are equally movable in space to provide equal changes in capacity between said devices and said bodies, said bodies being conductively connected to the housing.
  • the combination in a high frequency transmitting system, comprising a pair of electron discharge devices spaced apart and having substantially equal capacity between each device and surrounding objects, means connecting said devices in push-pull relation including an output inductance coil arranged between said devices, a pair of conducting bodies located on opposite sides of said discharge devices from said coil and arranged for equal movement with respect thereto thereby to vary the capacity in shunt with said coil, said bodies being connected to the cathodes of said devices, switching means for short circuiting a portion of said coil and a conducting member arranged for rotation within said coil to vary the inductance thereof.
  • the combination in a high frequency transmitting system, having a housing, a pair of electron discharge devices, symmetrically arranged in space relation with reference to the side walls of said housing, means connecting said discharge devices in push-pull relation including an output inductance coil having opposite points thereon connected to the anodes of said discharge devices, neutralizing capacitors mounted upon the sides of said discharge devices, conducting shields surrounding said capacitors and conductively connected to the anodes of said devices and conducting plates connected to said housing and movable into proximity to said conducting shields whereby the frequency at which said system is adapted to operate may be varied.
  • said coils having opposite points connected to thegrids of said devices and the other coil having opposite points connected to the anodes of said devices, means for supplying potential with respect to that of said housing to grids and anodes of said devices, and conducting bodies connected to the housing, arranged on opposite sides of said discharge devices and movable between said housing and said discharge devices thereby to vary the frequency at which said system is adapted to operate.
  • a pair of electron discharge devices each 7 of said devices having an anode, a cathode and a grid
  • means connecting said coils in push-pull relation comprising a cylindrical coil arranged between said devices, said coil having oppositely wound sections extending from .the midpoint thereof, a conducting member extending longitudinally of each section, each member being connected to the grid of one'of the discharge devices, contacts arranged for sliding engagement with said coil and said members and arranged forlongitudinal movement with respect to said member as the coil is revolved, an additional contact arranged within each section of said coil and adapted for movement both longitudinally and circumferentially thereof, a second coil arranged between said discharge devices and having opposite points connected to the anodes of said devices, and means in addition to said coils for varying the frequency at which said system is adapted to operate.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Particle Accelerators (AREA)
US291268A 1928-07-09 1928-07-09 Signaling system Expired - Lifetime US1850858A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL29397D NL29397C (enrdf_load_stackoverflow) 1928-07-09
US291268A US1850858A (en) 1928-07-09 1928-07-09 Signaling system
GB20174/29A GB315219A (en) 1928-07-09 1929-07-01 Improvements in amplifying systems employing thermionic valves
FR678056D FR678056A (fr) 1928-07-09 1929-07-09 Perfectionnements aux amplificateurs à faible longueur d'onde
US491990A US1854008A (en) 1928-07-09 1930-10-29 Inductance coupling device
FR40780D FR40780E (fr) 1928-07-09 1931-08-18 Perfectionnements aux amplificateurs à faible longueur d'onde

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US291268A US1850858A (en) 1928-07-09 1928-07-09 Signaling system

Publications (1)

Publication Number Publication Date
US1850858A true US1850858A (en) 1932-03-22

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ID=23119622

Family Applications (1)

Application Number Title Priority Date Filing Date
US291268A Expired - Lifetime US1850858A (en) 1928-07-09 1928-07-09 Signaling system

Country Status (4)

Country Link
US (1) US1850858A (enrdf_load_stackoverflow)
FR (2) FR678056A (enrdf_load_stackoverflow)
GB (1) GB315219A (enrdf_load_stackoverflow)
NL (1) NL29397C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2453433A (en) * 1946-06-11 1948-11-09 Jefferson Standard Broadcastin Heat dissipation for electronic tube apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2487460A (en) * 1946-08-06 1949-11-08 Electrical Engineering And Mfg Starter-generator for internalcombustion engines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2453433A (en) * 1946-06-11 1948-11-09 Jefferson Standard Broadcastin Heat dissipation for electronic tube apparatus

Also Published As

Publication number Publication date
NL29397C (enrdf_load_stackoverflow)
FR40780E (fr) 1932-08-23
GB315219A (en) 1930-10-01
FR678056A (fr) 1930-03-18

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