baber/WOPTO huggingface dataset:
Patent AT-390179-B (AT)
IPC: A61N1/16
Filed: 1987-09-24
Granted: 1990-03-26
Abstract: A health mattress contains a spring core 2 formed from copper-coated wire. This core can be fixed in a strip- steel frame 1 coated with copper on both sides. A layer of magnetic film 3, preferably fitted with magnetic elements 4, can be fastened to the spring core 2. A jute layer 5 and a foam rubber layer 6 can be inserted between the magnetic film layer 3 and spring core 2, and an additional cushioning layer, such as a non-woven fabric or a layer of wadding, can also be fastened onto the magnetic film layer 3. <IMAGE>
Patent AT-398450-B (AT)
Title: Double-leaf exterior wall
IPC: E04C2/04
Filed: 1988-10-10
Granted: 1994-12-27
Abstract: Double-leaf exterior wall, the inner leaf comprising heat- insulating lightweight concrete blocks, e.g. with the addition of comminuted, cement-bound Styropor parts, and, if appropriate, having inner channels for filling with normal-weight concrete. In order to achieve a high level of strength and heat insulation, it is provided for the inner shell to have, on the side which is directed towards the outer shell, vertical or obliquely running ribs b1 to b12, b1R, b3R, b4R which are either formed integrally with the inner shell or are adhesively bonded thereon, and for the outer shell c1 to c4 to comprise, as is known per se, masonry blocks, one-quarter clinkers, wood or the like. <IMAGE>
Patent DK-166321-B (DK)
Inventor: PADMANATHAN THURAIRAJAH
IPC: C07D245/02
Filed: 1985-03-07
Abstract: This invention provides a process for preparing a 2-hydrazino-1,3-diazacycloalk-2-ene hydrohalide The process comprises reacting a one molar proportion of either tautomeric isomer of a 2-nitroamino-1,3-diazacycloalk-2-ene represented by the following formulas:wherein R<sup>1</sup> is hydrogen, C<sub>1</sub>-C<sub>6</sub> alkyl, C,- C<sub>6</sub> hydroxyalkyl, C,-C<sub>6</sub> alkoxyalkyl, phenyl, substituted phenyl, benzyl, or substituted benzyl, R<sup>2</sup> and R<sup>3</sup> are independently hydrogen, C,- C<sub>6</sub> alkyl, C<sub>1</sub>-C<sub>6</sub> alkoxy, C,-C<sub>s</sub> alkoxyalkyl, hydroxyl, aryl, substituted aryl, aralkyl and substituted aralkyl, and n is an integer from 0 to 3 with about an equimolar proportion of an ammonium halide or hydrazonium halide, and about a 1 to 2 molar proportion of hydrazine hydrate in a composition selected from a C, to C, aliphatic alcohol, water or a mixture thereof, at a temperature from about ambient to the reflux, and isolating the end product as a monohydrohalide.This invention also provides a process for preparing a 2- hydrazino 1. 3-diazacycloalk-2-ene dihydrohalide. The process comprises reacting a compound of the formula:wherein R<sup>1</sup> is hydrogen, C, to C<sub>6</sub> alkyl, or C, to C<sub>6</sub> hydroxyalkyl, R<sup>2</sup> and R<sup>3</sup> are independently hydrogen or C, to C<sub>6</sub> alkyl, n is 0 to 3 and X is a halide ion, with hydrogen halide wherein the halide ion is the same as defined above in a C, to C<sub>4</sub> alkyl alcohol at about 0 to 30C.; and recovering the corresponding 2-hydrazino-1, 3-diazacycloalk-2-ene dihydrohalide.
Patent DK-158950-B (DK)
Inventor: GOLDMANN SIEGFRIED
IPC: C07D307/66
Filed: 1984-02-29
Abstract: Dihydropyridines of the formula   <IMAGE>   in which R1, R2, R5 and R6 can be hydrogen or various halogen or organic radicals, R4 is an optionally substituted hydrocarbon radical, A is a direct bond, a C1-C20-alkylene chain or a C2-C20-alkenylene chain, which chains are optionally interrupted by O or S X is O or S, and Y is a direct bond, O, S, -NH-or-N-alkyl with 1 to 8 C atoms or a pharmaceutically acceptable salt, are useful as cardiotonic agents for improving heart contractility, antihypotonic agents, for lowering the blood sugar level, for detumescing mucous membranes and for influencing the salt and/or liquid balance.
Patent DK-163150-B (DK)
Title: Apparatus for counting and sorting coins belonging to a set of coins
Inventor: ZIMMERMANN GERT
IPC: G07D3/16
Filed: 1985-12-30
Abstract: PCT No. PCT/DE85/00171 Sec. 371 Date Jan. 21, 1986 Sec. 102(e) Date Jan. 21, 1986 PCT Filed May 17, 1985 PCT Pub. No. WO85/05478 PCT Pub. Date Dec. 5, 1985.A device for counting and sorting coins belonging to a set of coins with a guideway 8 tangentially connected to a horizontal coin plate 3 is to be developed for separating foreign coins 11' through a sort-out opening 16. To this end, and behind a coin identifying device 14 and immediately in front of the sort-out opening 16, a diversion element 18 is movably arranged for the coins 11' identified as foreign or counterfeit coins by the coin identification device 14, with its front edge 35 arranged at a distance of at least the width of guide rail 17 from the guiding edge 9, with the diversion element 18 able to be triggered by the coin identification device 14. The diversion element 18, which in its active position is brought into the path of movement of coins 11, 11', diverts the coins from guiding edge 9 by at least a distance that is equal to or greater than the width of guide rail 17. In this manner, the foreign coins 11' to be separated out can drop through the sort-out opening 16. To improve the identification quality, the coin identifying device 14 comprises in addition to an optical fiber bar 31 for identifying diameters, also inductive heads 32, 33 to identification of the alloy of coins 11, 11' and/or for determining the thickness of coins 11, 11'. In addition, further components to identify the milled edge of the coins and their surface structure are arranged downstream.
Patent DK-163351-B (DK)
Inventor: BRIAND JEAN-PATRICK
IPC: B29K105/04
Filed: 1987-12-03
Abstract: The said article, solid or hollow, comprises a core 1 and an outer sheath 2 which surrounds at least once the said core and firmly adheres thereto. The process consists: in conforming at least one strip of flexible material around a stationary hollow element 20 to form the sheath 2; in continuously driving the sheath 2 thus formed towards the end of the stationary hollow element; and in continuously dispensing from a tank 25, 27, where it is fluid or pasty, the material forming the core 1 into the stationary hollow element, from one end of the latter towards the said free end, in order that, on exiting the hollow element, the said material is received into the mould which the sheath 2 constitutes and spreads out therein on cooling and on adhering to the sheath on exiting the hollow element. The composite article obtained is applicable in the packaging, civil engineering, agricultural and insulation industries. <IMAGE>
Patent FI-70499-B (FI)
Inventor: GOMBERT JEAN-MARIE
IPC: A01G9/00
Filed: 1983-04-13
Granted: 1986-06-06
Abstract: Device for the permanent nutrition of pot plants and containing a granulated slow-release fertilizer comprising at least one fertilizing element selected from nitrogen, phosphorus and potassium, consisting of a flat support, on the upper surface of which adhere the granules, and a water-permeable sheet covering the flat support so as to enclose the granules.
Patent FI-89807-B (FI)
Inventor: SEXTON DIANE
IPC: H05K1/03
Filed: 1986-07-31
Granted: 1993-08-13
Abstract: An epoxy resin composition having exceptional stability which is useful in the preparation of electrical laminates comprises an epoxy resin such as the diglycidyl ether of bisphenol A, an organic solvent, a polyhydric phenolic hardener and an acid having a pk. at 25°C of less than 2.5 or an ester or anhydride of such acid. The epoxy resin composition can also contain a bisphenol or bisphenol derivative such as bisphenol A. In addition, an accelerator such as an alkyl substituted imidazole can also be added to the composition prior to its use as in the preparation of electrical laminates.
Patent FI-85727-B (FI)
Inventor: LEHMANN KLAUS
IPC: D21C5/02
Filed: 1988-02-01
Granted: 1992-02-14
Abstract: A procedure wherein printed waste paper is treated in a pulper under alkaline pH conditions by means of an alkali metal silicate, oxidising bleaching agents, higher fatty and/or resin acids and dispersants and the released particles of printing ink are separated from the suspension of fibres by flotation, where the fatty and/or resin acids are used in the form of their alkaline earth metal salts finely distributed together with dispersants in an oil-in-water dispersion which is liquid at room temperature.
Patent FI-90053-B (FI)
Inventor: MUELLER KARL-HANS
IPC: E04G21/04
Filed: 1988-03-17
Granted: 1993-09-15
Abstract: To apply a layer of spray concrete to a surface, a pumpable and sprayable spray concrete mix is made up from cement, aggregates, if appropriate additives, and water. A preset mass flow of the spray concrete mix is sprayed by means of a concrete delivery pump through a concrete transfer line to a spray gun with a device for introducing propellant air under a delivery pressure of several bar. The propellant air is laden with synthetic silica having a BET surface area of at least 25 m<3>/g. With the propellant air, the synthetic silica is introduced into the mass flow of the spray concrete mix in such a quantity that the applied spray concrete undergoes a spontaneous temperature increase by a few degrees Kelvin immediately after the application. A spray gun for the process is also described.
Patent FI-80095-B (FI)
Title: To facilitate the replacement of endless press felt or a corresponding cover intended appliance for a paper or cartonboard machine
Inventor: HIRSIMAEKI LAIJO
IPC: D21F1/24
Filed: 1988-08-23
Granted: 1989-12-29
Abstract: In order to facilitate the replacement of an endless press felt or a corresponding cover, the intended appliance for a paper or cartonboard machine comprises a swing arm (3) stored around a support point (2'), moveable with the help of an influencing device (4), showing a fixed body (5) set up to support the cylinder (1) in a way that the cylinder can be fixed near the arm with its longitudinal axis immovable in relation to the arm (3). The fixed body (5) has a cavity, and the body for locking the cylinder in the cavity comprises a fixing device (11a, 11b) that at least partially covers the mouth of the cavity, and that is arranged to be turned from the height of the bottom of the cavity in the direction transverse to the cylinder's (1) longitudinal axis to a position where it at least partially covers the mouth of the cavity.<IMAGE>
Patent FI-79756-B (FI)
Title: Device for displacing a target board
Inventor: RAETY MATTI
IPC: F41J9/02
Filed: 1988-10-13
Granted: 1989-10-31
Abstract: Device for displacing a target board (1) on a shooting range transverse to the shooting line at a required distance from the marksman. The device comprises a displacement track (3), on whose target board (1) are arranged: two break wheels (4, 5) which are arranged at a distance from one another; an endless line (6), which is arranged to run around the break wheel (4, 5); an electric motor (7), which is joined to one of the break wheels (4). On both sides of the target board (1) is a projection (10, 10a, 10b), which shows notches (11, 11a, 11b), where the breadth of the notch opening (12) is the same size as or larger than the thickness of the endless line (6). On the endless line (6) is an extension, the cross measurement is greater than the width of the notch opening (12). The target board (1) is displaced on the displacement track (3) using the line (6) and the extension (13) and the notch (11). At each end (3a, 3b) of the displacement track (3) is a deflection unit (14; 14a, 14b), with the help of which the one notch (11a) and the target board (1) are released from the transport by the line (6) and the extension (13) on this at the same time as the line (6) continuing to run through the other notch (11b), and the extension (13), when it has run around the break wheel (4, 5), takes the target board (1) with it to the other notch (11b) on this and begins to transport it along.<IMAGE>
Patent FI-91474-B (FI)
Inventor: MORRISON DAVID GEOFFREY
IPC: H04N21/242
Filed: 1989-05-22
Granted: 1994-03-15
Abstract: A coder assembles bursts of blocks of image data (eg transform coded coefficients) and associated overhead data into a sequence of data which are then transmitted. Both the transform coded coefficients and the overhead data are initially stored in separate FIFO memory stores (21)(22). The blocks of transform coded coefficients have a 'last coefficient' flag accompanying the last coefficient, and the overhead information contains a unique word SWITCH, after the header information but before the 'end-of-block' flag. The 'last coefficient' flag and the SWITCH word are recognised by a toggle controller (29) which controls the reading of the stores so that the coefficient data and overhead data are selectively passed to a buffer (30) in a desired sequence. The buffer (30) is followed by a variable length coder (31) which supplies the output of the coder at a constant bit rate. Provision (34-38) is made to calculate the quantity of output data represented at any time by the contents of the buffer and the result is used to control the rate of generation of image data.
Patent FI-92756-B (FI)
Inventor: LAAKSONEN PAAVO
IPC: B29C69/00
Filed: 1991-09-03
Granted: 1994-09-15
Abstract: The invention relates to a method of protecting a pipe end. According to the invention, a film (2) covering the pipe end is attached to the end surface of the pipe (6) by welding or other similar sealing method. <IMAGE>
Patent FI-110937-B (FI)
Inventor: GUISELIN OLIVIER
IPC: E06B5/00
Filed: 1994-08-11
Granted: 2003-04-30
Abstract: Transparent substrate (1), especially of glass, with thin multilayers, on which the following are deposited in succession:     - a first coating of dielectric material (2), - a first layer (3) with properties of reflection in the infrared, especially metal-based,   - a second coating of dielectric material (5), - a second layer (6) with properties of reflection in the infrared, especially metal-based, - a third coating of dielectric material (8), characterised in that the thickness of the first layer with properties of reflection in the infrared (3) corresponds to approximately 50 to 80 %, especially 55 to 75 % and preferably 60 to 70 %, of that of the second layer with properties of reflection in the infrared (6).   <IMAGE>
Patent FI-111748-B (FI)
Inventor: NUNUPAROV MARTYN SERGEEVICH
IPC: E05B47/06
Filed: 1995-11-10
Granted: 2003-09-15
Abstract: The invention provides an electronic lock, in which body 14 there is mounted a bar 1, a bar shifting mechanism including riegel 2 (bolt), a control lever 3 and a blocking mechanism. The latter is made in form of an electromechanical catch which moving plate 11 is coupled to a limiter 8 blocking the bar shifting mechanism. In the present aspect of the electronic lock a power consumption is reduced significantly. <MATH>
Patent FI-100670-B (FI)
Inventor: SILENIUS PETRI
IPC: D21H17/28
Filed: 1996-02-20
Granted: 1998-01-30
Abstract: The invention relates to a procedure for adding a filler into a pulp based on cellulose fibres, in which the pulp is fluidized and the filler is added into it. Preferably the pulp is stirred in the fluidized state while the filler is being added. The pulp is preferably at a medium consistency when the filler is being added. Preferably the filler added into the pulp is calcium hydroxide and the calcium carbonate is precipitated with carbon dioxide.
Patent FI-117829-B (FI)
Inventor: DI LORETO OSWALDO
IPC: F27D1/00
Filed: 1996-09-24
Granted: 2007-03-15
Abstract: PCT No. PCT/BE95/00012 Sec. 371 Date Sep. 10, 1996 Sec. 102(e) Date Sep. 10, 1996 PCT Filed Feb. 10, 1995 PCT Pub. No. WO95/26324 PCT Pub. Date Oct. 5, 1995A powdered mixture of chemicals for forming a refractory composition, including a filler consisting of refractory particles, metal particles and metal peroxide containing particles, wherein the metal peroxide containing particles have a calcium peroxide content of at most 75 wt %, a magnesium peroxide content of at most 30 wt %, a barium peroxide content of at most 92 wt %, and/or a strontium peroxide content of at most 90 wt %. A refractory composition prepared from said mixture, a method for forming said composition and a method for using same are also disclosed.
Patent FI-119430-B (FI)
Inventor: VAN BEEK JOHANNUS ANTONIUS MAR
IPC: C08F10/00
Filed: 1997-04-29
Granted: 2008-11-14
Abstract: The invention relates to a new catalyst composition which is suitable for the polymerization of an olefin and which comprises a reduced transition metal complex and a co-catalyst. The invention is characterized in that the transition metal complex consists of a reduced transition metal, chosen from groups 4-6 of the Periodic Table of the Elements, with a multidentate monoanionic ligand and with two monoanionic ligands. In particular the reduced transition metal is titanium (Ti).
Patent HU-196050-B (HU)
Inventor: DUKAI JOZSEF
IPC: C07C49/16
Filed: 1984-04-20
Abstract: Szakaszos üzemben a;· aceton t 30 és +25°C
közötti hőmérsékleten úgy klórozzák, hogy a klórgáz
adagolási sebességét a kezdeti 0,4 0,8
mól (CL)
mól/ace’on/óra
értékről az aceton legalább 55 tömeg%-ának átalakulásáig
legalább másfélszereiére emelik, majd a kezdeti
klór betáplálást sebesség kétharmadára csökkentik és
a klórfelesleg megjelenése után legalább 3 óráig állni
hagyják. A reakcióban keletkezett sósavat levegővel
kifuvatják és adott esetben az aszimmetrikus dildór-
-acetont desztillációva! kinyerik.
A folyamatos eljárás során az acetont -15 és
-5°C közötti hőmérsékleten a számított mennyiségű
klórgáznál legalább 5 tömeg%;kal többel klórozzák
és a továbbiakban a szakaszos eljárásban megadottak
szerint járnak el.
Patent HU-191683-B (HU)
Title: Process for production of cefem compounds
Inventor: SCHWAB WILFRIED
IPC: C07D501/06
Filed: 1984-05-02
Abstract: Verfahren zur Herstellung von Cephemverbindungen der Formel
Patent HU-207754-B (HU)
Title: Castable and porcelain-coatable niccel-based tooth-metal alloy
Inventor: SZIPKA KAROLY
IPC: C22C19/00
Filed: 1990-04-04
Abstract: The components are melted and deoxidised with a CaSiMnZr complex before casting into a form. The alloy comprises (%w/w): max. 0.1 C, 0.2-0.8 Mn, 0.5-2.5 Si, 19-29 Cr, 4-10 Mo, max. 2 Fe, 0.15-3 Ga, 0.1-1 Zr, 0.02-0.5 Ce, 0.01-0.1 Al, 0.00001-0.00004 Ca, made up to 100 with Ni
Patent HU-195602-B (HU)
Inventor: HAVASI SANDOR
IPC: H04B5/04
Filed: 1986-05-23
Abstract: A találmány tárgya személyhívó berendezés, előnyösen nővérhívó, melynek hívójel adói /Al — AN/, azokkal kapcsolatban álló liívójel vevői /Vl — VN/ és jelfeldolgozó, vezérlő központi egysége /KE/ van, amelynek lényege, hogy minden hívójel vevővel /Vl — VN/ a hívóhelyen telepített legalább egy hívójel adó /Al — AN/ áll közelzónát hasznosító átviteli kapcsolatban, továbbá a hívójel vevők /V1 - VN/ a központi egységgel /KE/ és egymással vezetékes kapcsolatban állnak, ahol a hívójel vevők /Vl -- VN/ vezérlő bemenetére közvetlenül vagy az előző hívójel vevőn /VN - 1/ keresztül csatlakozik a központ; egység /KE/ vezérlő kimenete, míg a hívójel vevők /Vl — VN/ azonosító hívójel kimenete rendre a következő hívójel vcvő./Vl - VN/ hívójel bemenetére, az utolsó hívójel vevő /VN/ hívójel kimenete pedig a központi egy•ség /KE/ hívójel bemenetére csatlakozik. A1 O -- A2 O ΑΝ O--- A1 O--- A2 O---- AN O--- Al O--- A2 O-AN O-----  I I I I Α1 O-A2 O- ΑΝ O----- LL VN JL-L KE T E -1-
Patent HU-198902-B (HU)
Title: Process for production of derivatives of gamma-allenilgamma-amino butyric acid and medical compositions containing them
Inventor: KRANTZ ALEXANDER
IPC: C07D207/26
Filed: 1984-07-06
Abstract: This invention is for  gamma -allenlyl- gamma -aminobutyric acid derivatives which are  gamma -aminobutyric acid transaminase inhibitors.
Patent HU-183709-B (HU)
Inventor: NAGY ISTVAN
IPC: E02D27/38
Filed: 1981-11-27
Abstract: A találmány alapozási szerkezet folyadéktároló medencékhez, úszómedencékhez és hasonlókhoz, amely szerkezetnek bordázatához erősített lemezek által alkotott oldalfalai és fenéklemeze van, amely alapozási szerkezet a medencefalak alátámasztására szolgáló szilárd alaptesttel, például vasbeton sávalapokkal, vagyis alaplemezzel rendelkezik. A találmány lényege, hogy a medence-oldalfalak álló helyzetű bordái alsó végük tartományában oldalirányú elmozdulást meggátló, de függőleges elmozdulást és/vagy szögelfordulást lehetővé tevő kapcsolatai vannak alaptesthez csatlakoztatva, felső végük tartományában pedig húzó- és nyíróerők felvételére alkalmas, szögelfordulást megengedő kapcsolattal csatlakoznak valamely rögzített helyzetű testhez. A találmány tárgyát képező másik megoldásnál a medenceoldalfalak álló helyzetű bordáihoz kifelé és lefelé irányuló, a bordák felső vége tartományából kiinduló ferde támasztórudak vannak csatlakoztatva. Az álló helyzetű bordák és a ferde támasztórudak alsó vége tartományában az álló helyzetű bordák függőleges elmozdulását és/vagy szögelfordulását lehetővé tevő kapcsolatok vannak. A találmány előnye, hogy az alapozási szerkezet igen egyszerű, gazdaságos, a folyadéktárolók mozgásait jól követi, úgyhogy e mozgások nem vezethetnek az alaptest károsodásához. A találmány szerinti szerkezet tetszőleges anyagú (fém, műanyag stb.) és tetszőleges alakú (alaprajzú) folyadéktárolók, medencék, tartályok, úszómedencék stb. alapozására alkalmas.  -1-
Patent HU-206546-B (HU)
Inventor: HAKLIK LAJOS
IPC: G01N21/59
Filed: 1989-07-19
Abstract: A találmány célfotométer vizek, elsősorban ipari technológiai és szennyvizek, valamint természetes és kommunális vizek foszfáttartalmának meghatározására, amely fényforrást és fényérzékelőt, továbbá a fényforrás és a fényérzékelő között elhelyezett folyadéktárolót, valamint a fényérzékelőhöz csatlakoztatott feldolgozó elektronikát és tápfeszültség foreást tartalmaz. A folyadéktároló referencia küvetta tartóval és mérendő küvetta tartóval rendelkezik. A fényfomás és a referencia küvetta tartó közé féligáteresztő tükör van beépítve. A féligáteresztő tükör és a mérendő küvetta tartó között derékszögű prizma van. A fényérzékelő referencia fényérzékelő és mérő fényérzékelő alkotja, a mérő fényérzékelő pedig a feldolgozó elektronika bemenetéhez van kötve. Jellegzetessége, hogy a mérő fényérzékelő (72) a mérendő küvetta tartó (62) mö- HU 206 546 B A leírás terjedelme: 6 oldal (ezen belül 1 lap ábra)
Patent HU-206684-B (HU)
Title: Process for producing substituted 1h-imidazols and pharmaceutical compositions containing them as active component
Inventor: COSSEMENT ERIC
IPC: C07D233/64
Filed: 1987-11-04
Abstract: New substituted 1H-imidazoles and their salts, processes for the preparation thereof and pharmaceutical compositions. These compounds have the formula   <IMAGE>   wherein R1, R2, R3 and R5=hydrogen or C1-C4-alkyl; R4=hydrogen, C1-C4-alkyl or C1-C4-alkoxy; Y1=hydrogen and Y2=OZ2 or the reverse; Z1=Z2=hydrogen or C1-C4-alkyl or Z1 and Z2=-CH2- or -C(CH3)2-. These compounds are prepared either by reducing a corresponding imidazole compound having a hydroxyl or alkoxy group on the methyl bridge between the imidazole and phenyl rings, or by hydrolyzing a 4-[[2,2-dimethyl-4H-1,3-benzodioxin-6(or 8)-yl]methyl]-1H-imidazole, or yet by reducing an alkyl 3-[(1H-imidazol-4-yl)methyl]-2-hydroxybenzoate. These compounds have cardiac, cerebral and tissular anti-ischemic activities.
Patent IT-1207392-B (IT)
Title: Naturally scented personal hygiene prods.
IPC: A61K/
Filed: 1979-04-24
Granted: 1989-05-17
Abstract: The speed of mobile (10) in communication with a base (14) is determined by monitoring Rayleigh fading of the signal strength received from base in order to adjust a threshold level so that the threshold increases with decrease in mobile speed. If the median of the signal strength received at mobile (10) from another base (16) or (18) exceeds that received from base by more than the threshold level, a handoff request is issued. Rayleigh fading is monitored by detecting the rate at which the instantaneous signal strength received at mobile (10) from base (14) crosses the short-term median level of that signal, that rate being dependent on the maximum doppler frequency which increases with mobile speed. The median measuring time period may increase with decrease in the maximum doppler frequency.