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US2553069A - Device for transmitting over a distance the position of an operating or indicating member - Google Patents

Device for transmitting over a distance the position of an operating or indicating member Download PDF

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Publication number
US2553069A
US2553069A US666804A US66680446A US2553069A US 2553069 A US2553069 A US 2553069A US 666804 A US666804 A US 666804A US 66680446 A US66680446 A US 66680446A US 2553069 A US2553069 A US 2553069A
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Prior art keywords
primary
disc
contact
brushes
positions
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US666804A
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English (en)
Inventor
Unk Jacob Marinus
Horowitz Alexandre
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Hartford National Bank and Trust Co
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Hartford National Bank and Trust Co
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    • 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
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D3/00—Control of position or direction
    • G05D3/12—Control of position or direction using feedback
    • G05D3/125—Control of position or direction using feedback using discrete position sensor
    • G05D3/127—Control of position or direction using feedback using discrete position sensor with electrical contact

Definitions

  • the invention relates to a device for transmitting the position of a primary operating or indicating member to a remote secondary operating or indicating member and may be utilized inter alia for the remote control of the operating members of a radio transmitter or receiver (tuning, wave-length switching, volume control, adjustment of a directional aerial and the like), for taking measurements from a distance and for transmitting orders (ships telegraph)
  • a radio transmitter or receiver tunneled to the central processing unit
  • the invention is concerned use is made of a plurality of transmission channels for control energy and of a primary and a secondary controlling member, which con trolling members are formed so as to be comple mental-y and are driven simultaneously with the primary and the secondary operating member respectively. According to the position of the primary operating or indicating member'the primary controlling member opens a determined transmission channel.
  • the controlling members may consist of contact discs of conductive material which are scanned by brushes and the scanned surface of which is formed in such manner that only part of this surface may enter into conductive contact with the brushes.
  • Each brush of the primary contact disc is electrically connected to a "ar brush of the secondary contact disc whilst the cancel;- ing lines between similar brushes form the transmission channels above referred to.
  • the two contact discs are electrically connected to one another through the intermediary of a source of voltage and of a device for controlling the drive of the secondary operating or indicating member.
  • the last-mentioned device may be constituted, for example, by a motor which drives the sec-- ondary operating or indicating member or by a relay by which such a motor is put into operation.
  • Fig. 1 represents the prior art
  • Figs. 2, 3, l, 5, 5a and 6'9 represent various embodiments of the invention.
  • this dotted line is located, for example, at a transmitter or receiver which has to be operated from a distance.
  • a primary contact disc 3 of conductive material On the shaft 2 of a primary operating member is mounted a primary contact disc 3 of conductive material whose circumference is scanned by a plurality of brushes 171-126.
  • This disc has a shape such that only the portion 4 of the circumference enters intoconductive contact with. the brushes.
  • the remaining portion 5 of the circumference is preferably covered with insulating material so that cylindrical body is obtained with which all the brushes are in contact.
  • a secondary contact disc l of conductive material On the shaft 6 of the secondary operating member of the transmitter or receiver is mounted a secondary contact disc l of conductive material whose circumference is provided at 3. with. a recess which is preferably filled with insulating material so that the portion 8 of the circumference. cannot enter into contact with the brushes but the remaining portion can.
  • the two contact discs are complementary, that is to say that the portion l of the circumference of the primary contact disc, which'may enter into conductive contact with thebrushes, corresponds to the portion 8 of the ircumierence of the secondary contact disc. which is. insulated with respect to the brushes, and conversely.
  • Corresponding brushes of the two contact discs are electrically connected (b; to b1, 192 to 17's, etc.) through the intermediary of connecting lines K1Kc which form the transmission channels for the control energy above referred to.
  • the contact discs 3 and l are connected to one another via a source of alternating voltage 9, an induction motor l6 and a switch II.
  • the motor iii comprises two windings of which two corresponding ends are directly connected to one another and the other corresponding ends are connected toone another through the intermediary of a condenser, the arrangement being such that, upon connection of the one winding to a source of. voltage, the motor turns in the one direction and, upon connection to the other winding, turns the other direction.
  • the switch 5 it possible to incorporate at will either of the windings into the circuit and thus to choose the di ection of rotation of the motor always in such manner that a new position of the secondary operating member is attained along the shortest .1 possible path.
  • the position of the switch 8 i is made dependent on the direction in which the primary operating member i displaced, in such manner that, when the primary contact disc is driven in clockwise direction the secondary contact disc is likewise driven in clockise direction, and conversely.
  • the transmission channel K2 is opened, that is to say that a current flows from the source of voltage 9 via the motor H), the switch H, the contact disc 3, the brush b2, the connecting line K2, the brush U'z and the contact disc 1' back to the source of voltage 9.
  • the motor Ill is started and displaces the secondary operating member until the insulated portion 8 of the circumference of the contact disc I is opposite the brush bz and, consequently, the channel K2 is closed again by the contact disc 1.
  • the motor circuit is interrupted so that the secondary operating member stops, and this in a position which corresponds, at least approximately, to the new position of the primary operating member.
  • the known device has the drawback that there can only be transmitted a number of positions of the operating member which is equal to the number of transmission channels (with the abovedescribed construction consequently only six positions). If it is desired to transmit more positions, the number of transmission channels has to be increased, which makes the device more expensive and more complicated.
  • the invention has inter alia for its object to provide a device with the aid of which a number of positions can be transmitted which is larger than the number of transmission channels.
  • the controlling members are formed in such manner that within the variation range of the primary operating or indicating member the primary controlling member successively passes through a number of main positions wherein each time another combination of transmission channels is opened.
  • the contact discs are formed, according to the invention, in such manner that within the variation range of the primary operating or indicating member the primary contact disc successively passes through a number of main positions wherein each time another combination of brushes is in conductive contact with the contact disc.
  • the device shown in Fig. 2 comprises 6 transmission channels for control energy.
  • the primary contact disc 3 is constructed in such mannor that upon a complete revolution it passes successively through eighteen main positions in each of which another combination of three brushes is in conductive contact with the contact disc,
  • the primary contact disc 3 In the position shown the primary contact disc 3 is in conductive contact with the brushes bl, b2 and 193. If the disc is rotated in counterclockwise directicn through angle of 20, the brush ha is insulated whereas the brush in comes into conductive contact with the disc. If the disc is rotated through a further angle of 20, the brush 114 is insulated and the brush Z enters into contact with thedisc, and so on.
  • the secondary contact disc In the position shown the secondary contact disc is insulated from the brushes U1, 1): and b'x. If this disc is rotated in counter-clockwise direction through an angle of 20, the brush bs comes into contact with the disc and the brush b'4 is insulated, and so on. Upon a complete revolution of the secondary contact disc eighteen different combinations of three brushes are thus successively insulated and this in the same order in which with the primary contact disc the corresponding combinations enter into conductive contact with the disc.
  • the circumference of the primary contact disc 3 exhibits three portions which may come into contact with the brushes, which portions have the lengths 7S, S and S respectively and are separated from one another by insulating portions each of which has a length of 36, S representing the distance between two successive main positions measured along the circumference of the disc.
  • the mutual distance of the brushes amounts to 33.
  • the secondary contact disc 1 is formed so as to be complementary with respect to the primary contact disc.
  • a current flows from the source of voltage 9 via the motor [8, the switch H, the disc 3, one or more of the brushes b2, b5 and be, one or more of the connecting conductors K2, K5 and K6, one or more of the brushes b': 17's and bs and the disc 7 back to the source of voltage 9.
  • the motor If? is actuated and the secondary operating member is displaced until the secondary contact disc simultaneously closes the channels K2, K5 and K6, 1.
  • Fig. 4 shows how the primary and the secondary aseaoeo contact discs'rna'y be formed in the case wherein the're'areseven transmission channels.
  • Th'e'contr'oliing' members are as a 'ruleso formed that the combinations' or transmission channels which are successively opened upon a rotation-of the primary controlling"'member through an angle of I are cyclically permu'tated upon further "rotation of T'the primary "controlling member (cff the above-describedpractical examples).
  • Thenum berof positions to be transmitted is in this case always a whole'multiple ofK whilst the utilized combinations have to satisfy the condition-that they'must allow of being cyclically permutated K times without return of the same combina tion.
  • the table below indicates the maximum number of positions which when thiscondition is fulfilled, can be transmitted with the aid of a given number V of transmission channels?
  • the 1 secondary operating member comes at'a stop as "soon as the secondary contact disc insulates "the brushes 'b'r and bz, that'is, accordingtoithe direction of the displacement of the J secondary operating member, in one of the main positions wherein theI'blllShBS 7)1, b'z, Us or bi b'z, 17's" are insulated by the secondary contact discJ'fi
  • the position in? which the secondaryoperating member comes at a stop may differ by an amount of 60 from the position of the primary operating member. It is clear that so great a divergence is inadmissible in practice, that is to say that with'the device'-accorcling-to Fig. 2 it is inadmissible to placethe primary operating member in an intermediate position between two main positions.
  • Thesameremarks apply to the device described with reference to Fig.4, which has? transmission channels for the control energy:
  • the steps of the secondary operating member are not completely regular since they depend on the precision of the secondary contact disc and of the brushes of the secondary contact disc as well as on the path covered by the secondary operating member after the motor circuit has been interrupted. If desired, however, the steps of the secondary operating member may be made regular by arresting this member in the main positions with the aid of an arresting device which does not start operating until the motor circuit has been interrupted.
  • this may be achieved by giving the controlling members a shape such that in an intermediate position between two main positions the primary controlling member always opens a combination of (M l) transmission channels, which combination only forms part of those combinations of M transmission channels which are opened in the two adjacent main positions.
  • the combinations of (M 1) channels which are opened in the intermediate positions may be referred to as partial combinations whilst the combinations of M channels which are opened in the main positions are termed, for distinction, sum combinations.
  • Fig. 5 shows how the contact discs may be shaped in the case of '7 transmission channels to satisfy the above requirement.
  • the primary contact disc comprises three portions which may enter into contact with the brushes, which portions have the lengths (8S-a), (28-11.) and (2S-a) respectively and are separated by insu lated portions, each with a length of (3S-l-a).
  • a b if 1) denotes the width of a brush.
  • the secondary contact disc is formed so as to be complementary with respect to the primary contact disc. The mutual distance of the brushes amounts to 3S.
  • the brushes b1, b2, b3 and 115 are in conductive contact with the circumference of the primary contact disc 3. If the disc is rotated through an angle of in the direction of the arrow, the contact of the brush 115 with the disc is interrupted whereas the brush b6 enters into contact with the disc. Since a has been taken larger than b, the contact of the brush Us with the disc is, however, already interrupted for some time before the brush b6 comes into contact with the disc so that in the intermediate position between the two first main positions only the brushes b1, b2 and In, which are common to the combinations formed in the two first main positions, are in conductive contact with the disc.
  • the successively opened sum and partial combinations of channels consist of the channels having the following numbers: 1, 2, 3, 5-1, 2, 3-1, 2, 3, 61, 2, 6-1, 2, 4, 61, 2, 4-1, 2, 4, 7-1, 2, '7 l, 2, 5, 7 1, 5, 7 1, 3, 5, 7-1, 3, 7-1, 3, 6, 7-1, 5, 7-1, 4, 6, 7-4, 6, 7-2, 4, 6, 7-2, 6, 7-2, 5, 6, 7-5, 6, 7-3, 5, 6, 7-3, 5, 61, 3, 5, 61, 5, 6-1, 4, 5, 6-4, 5, 6-2, 4, 5, 6-2, 4, 5-2, 4, 5, 7-4, 5, 7-3, 4, 5, 7-3, 4, 5-1, 3, 4, 5-1, 3, 4-1, 3, 4-1, 3, 4-1, 3, 4-1, 3, 4-1, 3, 4-1, 3, 4-1, 3, 4-1, 3, 4-1, 3, 4-1, 3, 4-1, 3, 4-1, 3, 4-1, 3, 4-1, 3, 4-1, 3, 4-1, 3, 4-1, 3, 4-1, 3, 4-1, 3, 4-1, 3, 4-1,
  • the secondary contact disc is displaced until it has reached a position which corresponds to one of the adjacent main positions, in which position the brushes which pertain to the partial combination of the intermediate position concerned, are insulated with respect to the secondary contact disc.
  • the intermediate region with a length of (a-b) in which only (M-l) channels are opened must naturally be smaller than the distance S between two main positions so that a must always be less than S+b.
  • FIG 5a shows an embodiment of the invention including the circumferential arrangement of the disc scanning surface as shown in Figure 5. It is obvious that with this arrangement the combinations of transmission channels opened for the energy supply to the secondary member in the intermediate positions of the primary member, each of the combinations of transmission channels opened by the primary member is composed of channels which occur in the combinations of channels formed in the two adjacent main positions of the said primary member.
  • the contact discs may be shaped to satisfy the above-mentioned requirements.
  • the primary contact disc comprises here 4 portions which may enter into conductive contact with the brushes, said portions having the lengths (SS-a), (ZS-a), (3S-a) and (28-0.) respectively and being separated by insulated portions which have all of them the length (4S+a). In this case S+b a b whilst the spacing between two brushes amounts to 4.8.
  • the secondary contact disc is formed so as to be complementary with respect to the primary contact disc.
  • this disc Upon a complete revolution of the primary contact disc in the direction of the arrow, this disc passes through 32 main positions, in which event are formed successively the sum and partial combinations which consist of the channels having the following numbers: 1, 2, 3, 6-1, 2, 6- 1, 2, 4, 6-1, 2, 4-1, 2, 4, 7-1, 2, 7-1, 2, 5, 7- 1, 2, 5-1, 2, 5, 8-1, 5, 8, 1, 3, 5, 8-1, 3, 8-1, 3, 6, 8-1, 6, 8-1, 4, 6, 8-1, 4, 8, and so on (every group of four sum combinations and four partial combinations may be deducted by cyclic permutation from the preceding group).
  • Yul/The maximum number of main positions which can be transmitted in the case .of a continuous displacement of the primary operating or indieating member with the aid of a given number of ch annels, is in general equal to the number of sum combinations of M channels which are to formed from-the available channels and which may begrouped in such manner that every two adjacent sum combinations have in common a partial combination of (M 1) channels which; ffonly forms part of these two sum'combinations.
  • This maximum number of mainpositions is .i.-'smaller'than' the number of main positions given fin" Table lwhichi can be transmitted withcthe Ill/aid of a given number'of channels in the case of step-wise displacement of the primaryoperat- :i-ing or indicating member;
  • the secondary operating or indicating member follows the position of the primary'n em- 3 ber in steps, the position of the secondary memflberalways differs iii-general slightly fromthat oi theprimary member;
  • the secondary contact disc leaves the first main. position as soon as the brush bs enters into contact with the disc, that is tosay after a displacement through a distance equal to Sab 2 then passes through an intermediate region with a length of (a+b) wherein only the brushes b'i, b'z and 13's are insulated with respect to the disc, and attains the second main position as soon as .the brush b's is insulated with respect I out of circuit.
  • the secondary contact disc upon attaining the second'main position, switches the motor After the'motor has been cut out of circuit the secondary contact disc natural- 1y continues torun for a short time; the maximum path which is covered by the secondary contact disc in its continued rotation is denoted by 0. Since the disc must come at a stop within the region of the second main position, C must be smaller than S a-b.
  • the brushes of the primary and the secondary contact discs have the same width b and that the disc completely complementary so that the length a by which the conductive portions of the primary contact disc are shortened, is equal to the length by which the insulating portions of the secondary contact disc are shortened.
  • the primary contact disc is displaced with respect to the position shown through a distance which lies between and 3S 111 by 2 whilst the secondary contact disc comes at a stop in a position wherein the disc has been displaced with respect to the position shown through a distance which lies between
  • the amount of play consequently lies between
  • the length of the intermediate region of the primary contact disc consequently must exceed the length of the intermediate region of the secondary contact disc by at least 20, or in other words, the length of the region wherein the secondary controlling member closes a determined sum combination of m channels, must exceed the length of the region wherein the primary controlling member opens this combination of channels, by an amount which is at least equal to twice the maximum path which is still traversed by the secondary controlling member after the interruption of the transmission of control energy.
  • Fig. 8 shows how the contact discs may be constructed to satisfy this condition. This figure represents to an enlarged scale the same portion of the contact discs according to Fig. Which is also represented in Fig. '2, however, with modiand and
  • a device having 10 transmission channels and main positions affords a very satisfactory transmission over a distance.
  • this may be obtained by utilizing two primary and two secondary controlling members, in which event the two primary and secondary controlling members respectively are coupled with one another in a similar manner as the pointers of a clock, that is to say in such manner that one of the primary or secondary members performs t revolutions during one revolution of the other primary or secondary controlling member.
  • the one primary controlling member opens successively a number of different combinations out of a group of transmission channels, which combinations of transmission channels are closed by the corresponding secondary controlling member in the corresponding main positions.
  • Fig.9 represents an embodiment of such a device. Thatportion of this devicewhich is lomated to the left of line I is present at the point of remote operation whilst the portion located tothe right of line I is present at the place of the secondary operating or indicating member, for example, at the place of a transmitter or receiverwhich has to be operated from a distance.
  • the mechanical portion of the device is represented in dotted lines and the electric portion by full lines.
  • a pinion I5 On the shaft 2 of the primary operating or indicating member is mounted a pinion I5 which .mesheswith a gear wheel as mounted on a shaft I2.
  • a primary contact disc I3 On the shaft I2 is provided a primary contact disc I3 which is consequently driven by the shaft 2 at a reduced speed.
  • a gear wheel 25 which engages a pinion 24 mounted on a shaft 22.
  • a second primary contact disc 23 which is driven by the shaft 2 at an increased speed.
  • the ratios of transmission are so chosen that the contact disc 23 performs approximately revolutions during one revolution of the contact disc I3 (26:15).
  • the contact discs I3 and H are each scanned by '7 brushes of which only one (bu and bn respectively) is shown in the figure.
  • the circumferences of these discs are divided into portions which can enter and cannot enter into conductive contact with the brushes (this is not shown in the figure) in such manner that in one revolution the primary contact disc I3 passes successively through 21 main positions wherein each time another combination of four brushes is in contact with the disc. In the corresponding positions the corresponding 4 brushes are insulated with respect to the secondary contact disc I1.
  • Corresponding brushes of the contact discs I3 and I? are connected to one another through the intermediary of conductors of which only one (K11) is shown in the figure.
  • the contact discs 23 and 21 are each scanned by 10 brushes of which only one (1)21 and b'21) These discs are conthe primary contact disc 23 passes successively through 100 main positions wherein each time I an induction motor 30.
  • the primary contact disc I3 is connected to its secondary contactdisc I'ithrough the series- .connection of a source of voltage 9, a reversing drive theshaftc of the secondary operating or indicating member through the intermediary of a differential 2i so that the speed of the shaft 6 is always equal to thesum of the speeds of the
  • the motors 2B .and' 36 may also be given the same number of revolutions .and the differential may be constructed in such manner that it reduces the speed of the motor as in the required measure.
  • the reversing switch H is controlled in dependence of the direction,
  • the maximum amount of play which may occur between the positions of the primary contact disc l3 and the secondary contact disc IT is equal to In order to prevent the secondary operating or indicating member from coming at a stop in an incorrect position, this amount of play must be smaller than the path which is traversed by the primary contact disc l3 during one revolution of the primary contact disc 23 (N1 representing the number of main positions of the disc 13). If, for example, the maximum amount of play amounts to /4S,
  • the ratio of transmission must always be smaller than the number of main positions of the controlling member which has the smallest speed, namely so much smaller that the maximum amount of play between the positions of the two contact discs running at a low speed is smaller than l/t times the circumference of these discs.
  • the remote operation for example, of a radio receiver, may also be efiected in such manner that the operating member concerned is driven with the aid of a motor which is switched into circuit at the place of remote operation whilst with the aid of a device according to the invention the position of the operating member concerned is indicated at the place of remote operation.
  • That member of the receiver which is to be operated constitutes in this case the primary operating or indicating member in the spirit of the invention whilst the secondary indicating member is formed by a scale which is provided at the place of remote operation and on which the position of the member to be operated is read off.
  • control energy is electrically transmitted.
  • the invention may, however, also be applied to devices which operate, for example, pneumatically or hydraulically.
  • the connecting conductors k1 etc. are replaced by gas or liquid conduits and the contact discs 3 and 1 (l3, I1, 23 and 2'! respectively) by similarly shaped cam discs which control valves for opening or closing the gas or liquid conduits.
  • a device for transmitting over a number of transmission channels the position of a primary controlling member to a remote secondary member which is driven by driving means which comprises a source of energy, a driving means, a plurality of transmission channels of control energy, a primary member having means for connecting with a first predetermined number of said plurality of said transmission channels in each of a plurality of main positions and with a second predetermined number of said plurality of said transmission channels in each of a plurality of intermediate positions between two of said main positions, said second predetermined number being one less than said first predetermined number, a secondary member connected to the said primary member, through said channels, said source of energy, and said driving means, said secondary member having means for disconnecting from said first predetermined number of said plurality of said transmission channels in each of a plurality of.
  • said disconnecting main positions of said secondary member being complementary to the connecting positions of the said primary member whereby the said secondary member interrupts said energy supply from the said channels to the said driving means when the said secondary member has been driven by said driving means to the position at least approximately corresponding to the position of the said primary member, the said primary and secondary members being further characterized in that they are shaped such that in the said intermediate positions of the said primary member each of the said combinations of said transmission channels connected by the said primary member is composed of channels which occur in the combination of channels forming in the two adjacent main positions.
  • a device for transmitting over a number of transmission channels the position of a primary controlling member to a remote secondary member which is driven by driving means which comprises a source of electrical energy, an electric motor driving means, a plurality of transmission channels of control energy comprising electrical conductors, a primary disc-shaped member having means for connecting with a first predetermined number of said plurality of said trans mission channels in each of a plurality of main positions and with a secondpredetermined number of said plurality of said transmission channels in each of a plurality of intermediate positions between two of said main positions, said second predetermined number being one less than said first predetermined number, ondary disc-shaped member connected to the said primary member, through said channels, said source of energy, and said electric motor driving means, said secondary member having means for disconnecting from said first predetermined number of said plurality of said transmission channels in each of a plurality of main positions and from said second predetermined number of said transmission channels in each of a plurality of intermediate positions, said second predetermined number being one less than said first predetermined number, said disconnecting main positions
  • a device for transmitting over a number of transmission channels the position of a primary controlling member to a remote secondary member which is driven by driving means which comprises a source of electrical energy, an electric motor driving means, a plurality of transmission channels comprising electrical conductors each having a brush at either end thereof, a primary member having means for connecting with a first predetermined number of said brushes in a plurality of main positions and with a second predetermined number of said brushes in each of a plurality of intermediate positions between two of said main positions, said second predetermined number being one less than said first predetermined number, a secondary member connected to the said primary member, through said brushes, said channels, said source of energy, and said driving means, said secondary member having means for disconnecting from said first same predetermined number of said brushes in each of a plurality of main positions and from said second predetermined number of said brushes in each of a plurality of intermediate positions, said second predetermined number being one less than said first predetermined number, said disconnecting main positions of said secondary member being complementary to the connecting positions of the said primary member whereby
  • a device for transmitting over a number of transmission channels the position of a primary controlling member to a remote secondary member which is driven by driving means which comprises a source of electrical energy, an electric motor driving means, a plurality of electric conductors, a brush at either end of each of said plurality of electric conductors, a primary member having means for connecting with a first predetermined number of said plurality of said brushes in each of a plurality of main positions and with a second predetermined number of said plurality of said brushes in each of a plurality of intermediate positions between two of said main positions, said second predetermined number being one less than said first predetermined number, a secondary member connected to the said primary member, through said brushes, said channels, said source of energy, and said electric motor driving said secondary member having means for disconnecting from said first same predetermined number of said plurality of said transmission channels in each of a plurality of main positions and from said second predetermined number of said transmission channels in each of a plurality of intermediate positions, said second predetermined number being one less than said first predetermined number, said

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  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
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US666804A 1941-06-27 1946-05-02 Device for transmitting over a distance the position of an operating or indicating member Expired - Lifetime US2553069A (en)

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NL2553069X 1941-06-27
NL229997X 1941-06-27
NL609267X 1941-06-27
NL910557X 1941-06-27

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2662998A (en) * 1951-01-05 1953-12-15 Collins Radio Co Electric motor control for shaft positioning systems
US2721967A (en) * 1953-04-17 1955-10-25 Honeywell Regulator Co Electric motor follow-up system
US2726359A (en) * 1951-07-06 1955-12-06 Gen Controls Co Directional multiposition motor control
US2758270A (en) * 1953-04-17 1956-08-07 Honeywell Regulator Co Shaft positioning apparatus
US2783429A (en) * 1954-11-30 1957-02-26 Robert W Tauber Remote position control system

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AT77063B (de) * 1915-05-26 1919-07-10 Herman Axel Ing Schepeler Vorrichtung zur Übertragung von Zeichen oder Stellungen.
US1992945A (en) * 1930-11-26 1935-03-05 Teleregister Corp Limit order device
FR842116A (fr) * 1938-02-04 1939-06-06 Dispositif de transmission à distance de la position d'un organe mécanique mobile
US2406848A (en) * 1944-10-07 1946-09-03 Gen Electric Remote-control system

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US1992945A (en) * 1930-11-26 1935-03-05 Teleregister Corp Limit order device
FR842116A (fr) * 1938-02-04 1939-06-06 Dispositif de transmission à distance de la position d'un organe mécanique mobile
US2406848A (en) * 1944-10-07 1946-09-03 Gen Electric Remote-control system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2662998A (en) * 1951-01-05 1953-12-15 Collins Radio Co Electric motor control for shaft positioning systems
US2726359A (en) * 1951-07-06 1955-12-06 Gen Controls Co Directional multiposition motor control
US2721967A (en) * 1953-04-17 1955-10-25 Honeywell Regulator Co Electric motor follow-up system
US2758270A (en) * 1953-04-17 1956-08-07 Honeywell Regulator Co Shaft positioning apparatus
US2783429A (en) * 1954-11-30 1957-02-26 Robert W Tauber Remote position control system

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