baber/WOPTO huggingface dataset:
Patent HU-183695-B (HU)
Inventor: GRONIEWSKY TAMAS
IPC: C02F3/16
Filed: 1981-11-20
Abstract: A találmány résbukóra vonatkozik és szennyvíztisztító telepek levegőztető medencéjének oxigénellátásának szabályozására szolgál. A találmányunk szerinti résbukó azzal jelemezhető, hogy a résbukó átfolyási jelleggörbéje a levegőztető medencéhez rendelt levegőztető berendezés transzponált bemerülés-vízmennyiség jelleggörbéjével azonos, vagy közel azonos. Célszerű, ha a kitüntetett vízszint környezetében clhelyezkedő bukóélen túlmenően az említett bukóéllel párhuzamos tengelyű és üzemi állapotban legalább részben víz alatt elhelyezkedő nyílással vagy nyílásokká, rendelkezik. 183695 Nemzetközi osztályjelzet: (51) NSZOj C 02 F 3/16 r v Szabadalmi Tár. ’   ' JpLAJDONk  2. ábra -1-
Patent HU-186809-B (HU)
Inventor: MARTIN RICHARD
IPC: E01B7/24
Filed: 1983-10-24
Abstract: A váltócsúcssínek fűtéséhez szolgáló berendezés
forró gáz előállítására szolgáló két, fűtőgázzal táplált
3 égőkészülékkel van ellátva, amelyek 6 gyújtószerkezettel
és közös égési levegőt szállító 10 ventillátorral
rendelkeznek és a Z váltócsúcssínek között az S talpfákon,
illetve aljakon egymás mellett helyezkednek el
és 13 lemezfedéllel vannak ellátva. Olyan 1 fűtőcsöveik
vannak, amelyek a 3 égőkészülékektől vezetnek a Z
váltócsúcssínekhez és azok mentén a csúcssínhegy irányába
nyúlnak.
A lemezfedél mindegyik égőkészülékhez külön 13
fémlemezfedélként van kialakítva, amely a Z váltócsúcssín
felé forduló, az S talpfákra, illetve aljakra
szerelt 13" oldalfalakkal rendelkezik. A külső oldalfal
a vágányalátömedékelő szerszámok vagy hasonlók
munkáját lehetővé tevő távolságra vannak a feléjük
forduló Z váltócsücssíntől. Az 1 fűtőcsövek, illetve Γ
fűtöcsővégek a 13 fémlemezfedelek külső 13" oldalfalain
át vannak a Z váltócsúcssinhez vezetve és azon lényegileg
a í3 fémlemezfedeleket hordozó legelső S
talpfa tartományában vannak elhelyezve.
Patent HU-197365-B (HU)
Title: Equipment for direct currant electrochemical treatment of surface of metall band conducted on liquid film
Inventor: BECK IMRE
IPC: C25D19/00
Filed: 1986-08-22
Abstract: The equipment comprises perforated cylinders and half cylinders which guide the metal (prim. aluminium) strip along a wavy path. Electrolyte is passed through the perforations. Electrolyte is contained in a pressurised space enclosed by the perforated half-cylinder. An acid-resistant, perforated metal cover is located above the half-cylinder and provided with an electrical conductor, which is covered by an insulating grid. The electrolyte fills the space between this insulating grid and the metal strip to be treated, and allows friction free transport of the metal strip and the passage of electrical current between the perforated metal cover and the metal strip.
Patent HU-210569-B (HU)
Title: Process for the production of novel acetylcholinesterase inhibitors and pharmaceutical compositions containing the same
Inventor: SCHIRLIN DANIEL
IPC: A61P25/28
Filed: 1990-06-20
Abstract: This invention relates to silylated aromatic fluoro­ketones of the formula (I)
      and the pharmaceutically acceptable salts thereof, wherein each of m and n is zero or one with the proviso that the sum of m and n is less than two. 
X is H, Br, Cl, F, R₄, COR₅, CO₂R₅, CONHR₅ or COR₆; 
R₁, R₂, R₃ and R₄ each are C₁₋₁₀ alkyl, or (CH₂)p aryl, with p being zero, one or two, 
R₅ is H, C₁₋₁₀ alkyl, phenyl, benzyl or phenethyl, 
R₆ is (NHCHR₇C(O)) q R₈ with R₇ being the residue of any natural occurring α-amino acid, q is one to four and R₈ is OR₅ or NHR₅, 
Y is H, OH, C₁₋₆ alkyl, C₁₋₆ alkoxy, hydroxy C₁₋₆ alkyl, amino C₁₋₆ alkyl, NH₂, azido, CN, CO₂R₅, COR₅, -SO₃H, Br, Cl, F or -(CH₂) x SiR₁R₂R₃with x being zero, one or two, possessing acetylcholinesterase properties and to their use in the treatment of Alzheimer's disease and senile dementia.
Patent HU-206685-B (HU)
Title: Process for producing new 4/5/-imidazol derivatives
Inventor: KARJALAINEN ARTO JOHANNES
IPC: C07D233/54
Filed: 1990-03-29
Abstract: Novel imidazole derivatives of the formula <CHEM> wherein R1, R2, R min 1 and R min 2, which can be the same or different, are H, CH3, C2H5, C3H7, OCH3, OH, CH2OH, NO2, NH2, CN, CF3, CHF2, CH2F or halogen; R min  is H or <CHEM> where R3 is H, CH3 or halogen; R4 is H, R5 is H or OH, R6 is H or OH and R7 is H or R4 and R6 together form a bond or R5 and R7 together form a bond; X and Y, which can be the same or different, are a bond, a straight C1-2-alkyl or the corresponding alkenyl and z is 0 to 2 and <CHEM> wherein R1, R2, R min 1, R min 2 and R min  are as defined before, R4 is H or OH and R5 is H or R4 and R5 together form a bond and y is 0 to 4, and their non-toxic salts exhibit aromatase and desmolase inhibiting properties. Very selective aromatase inhibiting compounds are valuable in the treatment of estrogen dependent diseases, e.g. breast cancer.
Patent HU-208762-B (HU)
Title: Method for electrostatic coating inner surface of light source bulbs
Inventor: PALOTAI TAMAS
IPC: H01J9/20
Filed: 1988-09-07
Abstract: Method for coating inner surface of light source covers electrostatically applying anorganic powder and uses venturi effect to lift particles into cover
Patent HU-204907-B (HU)
Inventor: REISCH ROBERT
IPC: E02D31/10
Filed: 1988-10-25
Abstract: A védendő építmény (1) körül, attól-felülnézeti vetületben
tekintve - oldalirányú távközzel (a) a terepszint
(t) alatt alaprajzilag zárt vonalú, alaktartó, vagy lényegében
alaktartó határolófalat (5) készítenek. Ezzel a
határolófal (5) által körülzárt belső földtömeget (6) a
külső földtömeg (7) alábányászás következtében bekövetkezhető
alakváltozásaitól mentesítik, ily módon
a védendő építmény (1) ilyen okból bekövetkezhető
károsodását kiküszöbölik.
Patent HU-201477-B (HU)
Inventor: ELIAS BELA
IPC: A61K39/10
Filed: 1987-12-14
Abstract: Az eljárásszerint liofilezettBordetellabronchiseptica
N-104 (deponálási szám: NCAIM Β (P)
0010204) törzset 36-38 °C-on 24 órán át Westphalagaron
szaporítanak, majd III. fázisú immunsóval
ellenőrzik és ezt követően 7,4 pH értékű folyékony
tápközegbe oltják és a 2.10I0/ml csíraszám értékig
tenyésztik, végül az anyagot liofilezik.
Patent HU-202244-B (HU)
Title: Process for producing new antiviral purine derivatives and pharmaceutical compositions comprising same
Inventor: HARNDEN MICHAEL RAYMOND
IPC: A61K31/665
Filed: 1988-11-30
Abstract: Compounds of formula (I), and pharmaceutically acceptable salts thereof <CHEM>  wherein  R1 is hydroxy, amino, chloro or OR7  wherein R7 is C1-6 alkyl, phenyl or phenyl C1-2 alkyl either of which phenyl moieties may be substituted by one or two substituents selected from halo, C1-4 alkyl or C1-4 alkoxy; R2 is amino or, when R1 is hydroxy or amino, R2 may also be hydrogen;  R3 is hydrogen, hydroxymethyl or acyloxymethyl;  R4 is a group of formula: <CHEM> R5 and R6 are independently selected from hydrogen, C1-6 alkyl and optionally substituted phenyl; or  R3 and R4 together are: <CHEM>  wherein  R6 is as defined above; having antiviral activity, to processes for their preparation and their use as pharmaceuticals.
Patent HU-207030-B (HU)
Title: Process for producing and purifying heat stabilized, disubstituted propanol derivative
Inventor: GODLA IMRE
IPC: C07C31/38
Filed: 1990-10-12
Abstract: 1-(3-tri:fluoro-methyl-phenyl) -1-propanol (flumecinol) is heat stabilised and/or purified with hexa:methylene-tetramine. This flumencinol of novel compsn. is converted to a pharmaceutically active cpd. by distillation or rectification with no decompsn. associated with water elimination. The prod. has higher than 99% purity and finds application as an enzyme-conductors.
Patent IT-1204026-B (IT)
Title: Carving machine output dividing system
Inventor: GIULIANI MARCELLO
IPC: D01G/
Filed: 1986-02-14
Granted: 1989-03-01
Abstract: The suit is made of a piece of material which can cover the body several times and provided with various fastening means which can be joined in many directions
Patent IT-1236089-B (IT)
Title: Method and device for the recovery of tape excess in a paper transformation machine.
Inventor: BIAGIOTTI GUGLIELMO
IPC: B31C/
Filed: 1989-11-29
Granted: 1992-12-22
Abstract: Device for the recovery of a tape (N), of material in continuous feed with the mechanism for the elaboration of the tape self, is comprised of a recovery roller (155), and return rollers (157, 159, 167), which define the trajectory of said tape; in addition electrification mechanisms (161, 169), are provided, capable of generating an electric-static potential difference between the tape (N), and the recovery roller (155), which is electrically insulated. The potential difference determines the adhesion of the tape (N') in excess on the said recovery roller (155), up to the successive recovery of tape excess on the part of tape elaboration mechanisms.
Patent LV-13114-B (LV)
Title: Wet granulation formulation for bisphosphonic acids
Inventor: KATDARE ASHOK V
IPC: A61K9/22
Filed: 2003-10-08
Abstract: The present invention is directed to a method for preparation of a pharmaceutical composition containing biphosphonic acids by wet granulation process. The process employs a mixture of a biphosphonic acid and minimal amounts of other aids without addition of a binder. The pharmaceutical composition is useful in the treatment and prevention of diseases involving disorders of calcium and phosphate metabolism.
Patent LV-14989-B (LV)
Title: Support structure
Inventor: MIRONOVS VIKTORS
IPC: E04B1/38
Filed: 2015-01-14
Abstract: The invention relates to the field of civil engineering and machinery. The offered support structure consists of an annular or tubular casing, which cavity is arranged with reinforcing member and filled with the infill material. The reinforcing element is made of pre-perforated sheets, which are hingedly connected to each other. The connection is achieved by the mutual connection of sheets through the perforation openings. In addition, the perforated sheets can be produced with folded profile to form the closed plane. The sheets without perforation can be placed between perforated sheets as well. The perforated sheets in the support structures may be fixed to the central rod hingedly, for example, with helical spring. The metal rod can be made as a tubular coil. The perforated sheets can be separated with spacers, for example, made of permanent magnets, plastics or ceramics. They may be removed before filling the cavity. Polymers, metallic or ceramic powder (also their mixture), fine-graded concrete can be used as infill material. The specified elements may be used for production both of flat and three-dimensional rod-like constructions.
Patent MX-163982-B (MX)
Inventor: CADIEUX SERGE M
IPC: A61L15/00
Filed: 1986-08-29
Abstract: Dry laid board comprising peat moss is provided and made by harvesting peat moss having a degree of decomposition of H-1 value as measured by the Modified Von Post Scale, individualizing the harvested peat moss, drying the individualized peat moss and entraining the peat moss in a gas stream. The entrained peat moss is then condensed to form a low density peat moss containing board which is subsequently calendered for use in such products as dressings. diapers and sanitary napkins.
Patent MX-165975-B (MX)
Inventor: FALK CHARLES D
IPC: C04B28/26
Filed: 1987-05-21
Abstract: A coating composition for treating solid wastes is described and includes an aqueous silicate solution containing potassium oxide and silicon dioxide, a catalytic amount of an aqueous sodium borate solution and a fixative containing solid calcium oxide. A fumed silica may be added to either the aqueous silicate solution or sodium borate solution.
Patent MX-172460-B (MX)
Inventor: DEMING JOHN MILEY
IPC: A01N/
Filed: 1987-07-08
Abstract: The invention herein relates to dry flowable water-dispersible granular formulations and to a process for the preparation thereof. In particular, the water-dispersible granular formulations of this invention comprise a mixture of aggregates of microcapsules of water-insoluble pesticide, e.g., alachlor, or a plant growth regulant encapsulated within a polymeric shell wall and at least one other pesticide, e.g., atrazine or a salt of glyphosate, which is non-encapsulated. The water-dispersible granular formulations of the invention are prepared by mixing appropriate quantities of an aqueous dispersion of the encapsulated component, the non-encapsulated component and formulation adjuvants to form a slurry of the desired viscosity which can be directly extruded then dried or the slurry in more dilute, less viscous form may be spray dried, or agglomerated in fluid beds or rotating disc agglomerators.
Patent MX-166782-B (MX)
Inventor: DUMAS DAVID HOWARD
IPC: D21H17/21
Filed: 1982-09-14
Abstract: Described are sizing compositions in the form of aqueous dispersions comprising a hydrophobic cellulosereactive sizing agent such as a ketene dimer, fortified rosin and a water-soluble, nitrogen-containing cationic dispersing agent. The compositions are highly efficient internal or surface sizing agents for paper and maximize the advantages of each sizing component while minimizing the disadvantages.
Patent NO-149716-B (NO)
Inventor: SOEE NIELS
IPC: A23N17/02
Filed: 1980-11-28
Abstract: The apparatus comprises a stationary drum (2) having an infeed opening (9) for straw bales at one end of the peripheral drum wall and an oulet (32) for finished fodder mix at the opposite end. Centrally of the drum there rotates a shaft (5) which carries chopping means (18) in the region of the infeed opening (9) and mixing means (19) in a subsequent section. For introducing solid additives there are provided one or more openings (23) at the first mentioned end of the drum. A liquid binding agent can be supplied through the hollow shaft (5) and be sprayed through nozzles (27) secured in the section of the shaft which carries the mixing means. Further liquid constituents may, if desired, be supplied from the opposite shaft end and be sprayed through other nozzles (34) in the shaft. 
<??>The chopping means and/or the mixing means may be shaped so as to create an air stream through the drum from the infeed end towards the outlet in order to support the travel of material towards the outlet.
Patent NO-152675-B (NO)
Title: Anordning ved inhaleringsanordning for pulvermedikament
Inventor: YOUNG DAVID MACKAY
IPC: A61M15/00
Filed: 1981-06-05
Abstract: Inhaleringsanordning for pulverformet medikament i en beholder. Anordningen innbefatter et virvelkammer (10) tilpasset for å motta en medikamentbeholder. Kammeret (10) har luftinnløp (9) og et munnstykke står i kommunikasjon med dette. Et behol-dermottake.lseshulrom (11) står også i kommunikasjon med virvelkammeret (10) . Gjennomhullingsorgan (15) er anordnet for å stikke inn i en medikamentbeholder når denne er i hulrommet (11) og som kan trekkes ut fra den gjennomhullede beholderen, idet-hulrommet (10) er utført med hinder (12) for å forhindre at beholderen går inn igjen i hulrommet (11) etter at den er. blitt gjennomhullet.
Patent NO-160474-B (NO)
Title: Fremgangsmaate og sett for paavisning og bestemmelse av antistoffer mot opploeselige antigener.
Inventor: AALBERSE ROBERTUS CAROLUS
IPC: G01N33/537
Filed: 1982-04-30
Abstract: Fremgangsmåte for prøvning av antistoffer mot oppløselige antigener i en vandig prøve, særlig i kroppsvasker slik som blodserum eller blodplasma,. ved & bringe nevnte serum i kontakt med et antigen in vitro, hvor antistoffer, dersom slike er tilstede, bindes til nevnte antigener. Sett for prøvningen og påvisning av antigen-spesifikke antistoffer.Det anvendes et antigen som er modifisert ved hjelp av en gjenkjennbar gruppe, og nevnte modifiserte antigen er oppløselig i prøven.Den gjensidige påvirkning mellom antigen og antistoff finner sted i homogen oppløsning.
Patent NO-152063-B (NO)
Inventor: MOREAU PIERRE ANDRE
IPC: F42B14/06
Filed: 1983-02-15
Abstract: 1. A process for opening the launch sabot used for propulsion and guidance of a kinetic energy sub-projectile (1) of the Armor Piercing, Fin Stabilized, Discarding Sabot (AP.FS.DS) type with a sabot (4) comprising several components (4a, 4b, 4c), characterized by the fact that the opening takes place in two main phases : a first phase consisting of the sabot aft section opening through the discarding of the components while the fore section is still locked, and a second phase consisting of the fore section opening after full unlocking of the components, the opening of the aft section being followed up by the separation of the sub-projectile (1) from the sabot fore section.
Patent NO-173458-B (NO)
Inventor: LJOKKOI RISTO
IPC: B01D/
Filed: 1988-04-29
Abstract: The present invention relates to a method and apparatus for treating fiber suspension. The method and apparatus are particularly suitable for power screening of fiber suspension flowing to the head box of a paper machine. In the screen apparatuses of the prior art the accept pulp has either been thickened or diluted, the distribution of the pulp fraction has changed and the screen apparatuses have brought about pulses to the accept pulp. To eliminate these problems a new type of a rotor has been developped to be used with a screen cylinder. Bulges 10 - 40 or other projections of different shape have been arranged on the rotor surface on the screen cylinder side, which are used not only to keep the screen cylinder clean but also to effect the axial flow of the fiber suspension.
Patent YU-45680-B (YU)
Title: Postupak za dobijanje kristalnog cefaleksin hidrohlorid monohidrata
Inventor: ENGEL G L
IPC: C07D499/00
Filed: 1984-11-26
Abstract: POSTUPAK ZA DOBIJANJE KRISTALNOG CEFALEKSIN HIDROHLORID MONOHIDRATA, naznačen time, što obuhvata hidrataciju kristalnog cefaleksin hidrohlorid C1-C4 alkanol solvata, pri čemu se solvat izlaže atmosferi koja ima relativnu vlažnost od oko 10 do 0ko 50%. Prijava sadrži još 2 patentna zahteva.
Patent YU-42424-B (YU)
Title: Process for obtaining basic substituted phenylacetonitriles
Inventor: KASTNER G
IPC: A61K38/095
Filed: 1981-09-10
Abstract: A process for the preparation of phenylacetonitriles, carrying basic substituents, of the formula I    <IMAGE>  I  where R1, R2, R3, R4, R5, R6, R7 and R8 have the meanings given in the description, by reacting an aldehyde of the formula II    <IMAGE> II  with an amine of the formula III    <IMAGE> III
Patent RS-51898-B (RS)
Inventor: MIN HOSUNG
IPC: A61K38/08
Filed: 2002-10-11
Abstract: SPECIFIČNI AGENSI KOJI VEZUJU HUMANI ANGIOPOETIN-2. Polipeptid koji sadrži najmanje jednu aminokiselinsku sekvencu odabranu iz grupe koja se sastoji od SEQ ID. NO 2, SEQ ID. NO.: 4 i SEQ ID. NO: 76 do SEQ ID.NO.: 118 zaključno, pri čemu je dati polipeptid sposoban da se veže za Ang-2, i njegovefiziološki prihvatljive soli.Prijava sadrži još 43 patentna zahteva.
Patent ZA-806493-B (ZA)
Title: Thermally stable emulsion explosive composition
Inventor: SUDWEEKS W
IPC: C06B23/00
Filed: 1980-10-22
Abstract: Cap-sensitive water-in-oil emulsion explosive compositions are provided having a discontinuous aqueous oxidizer salt solution phase, a continuous oil or water-immiscible liquid organic phase, an emulsifier, and a density reducing agent. To render the composition thermally stable the salt solution contains at least 20% by weight calcium nitrate based on the total composition.
Patent ZA-811239-B (ZA)
Title: Boiler and method of heating liquid
Inventor: BURROWS R
IPC: F22B31/00
Filed: 1981-02-24
Abstract: In a tube boiler, fuel is burned in a fluidized bed which has a shallower part and a deeper part. The tubes extend only through the shallower part which can be fluidized independently of the deeper part so that the rate of heat transfer from the bed to the tubes can be varied according to demand. Water flows through specially configurated, upwardly oriented tubes by natural convection. There is also a general circulation of particles within the bed.
Patent ZA-876739-B (ZA)
Title: Stable hydrate of penicillin derivative and process for preparing same
IPC: A61K31/43
Filed: 1987-09-09
Abstract: A stable trihydrate of (2S, 5R, 6R)-6-{(2R)-2-[(2R)-2-amino-3-(N-methylcarbamoyl)propionamido]-2-(p-hyd oxyphenyl)acetamido}-3,3-dimethyl-7-oxo-4-thia-1-azabic yclo[3.2.0]heptane-2-carboxylic acid and process for preparing the same are disclosed.
Patent ZA-892171-B (ZA)
Title: 4-aryl-4-piperidine(or pyrrolidine or hexahydroazepine)carbinols and heterocyclic analogs thereof
Inventor: CIGANEK ENGELBERT
IPC: A61K31/4433
Filed: 1989-03-22
Abstract: Known and novel 4-aryl-4-piperidinecarbinols and heterocyclic analogs are useful as analgesics. Also provided are novel pyrrolidinecarbinols and hexahydroazepin carbinols which are useful as analgesics, antidepressants and, in some cases, as anorectic agents.
Patent ZA-896204-B (ZA)
Title: Process and apparatus for the purification of raw gas generated in a solids gasification process
Inventor: DR HEDERER HARTMUT
IPC: B01D46/30
Filed: 1989-08-15
Abstract: In a process and apparatus for purifying raw gas from solids gasification, containing granular and dusty solids particles, a solution is to be found, by means of which solids particles of any size are largely removed from the raw gas before entry to downstream cooling devices. This is achieved when the raw gas is passed in a first purification stage from the gasification zone in a straight line in the direction of a gas-holding space, whereby the granular solids particles are precipitated at the bottom of the gas-holding space and then, in a second purification stage, the partially purified raw gas is laterally deflected from the gas-holding space and undergoes a change to a velocity reduced by a factor of at least 3 and, after a further gas deflection, is passed substantially in the vertical direction through a solids filter, where the dusty solids particles are removed from the raw gas. <IMAGE>
Patent ZA-914488-B (ZA)
Title: Moulding and sealing compound
Inventor: BRIDE GABRIELE
IPC: C08L101/10
Filed: 1991-06-12
Abstract: A one-component moulding composition and sealant based on prepolymers containing silyl terminal groups with at least one hydrolysable substituent on the Si atom, organometallic tin compounds as catalyst, and inorganic fillers contains polyvinyl chloride and a thixotropic fatty acid amide in order to reduce the surface tack.
Patent ZA-935351-B (ZA)
Title: Hydroxamic acid derivatives as metalloproteinase inhibitors
Inventor: DICKENS JONATHON PHILIP
IPC: A61P9/00
Filed: 1993-07-23
Abstract: Compounds of formula (V) : <CHEM> wherein R2 represents a group R6-A- wherein A represents a divalent straight or branched, saturated or unsaturated hydrocarbon chain of up to 6 C atoms which may be interrupted by an O or S atom, and R6 represents hydrogen or an optionally substituted phenyl, cycloalkyl or cycloalkenyl group; and the groups R12 and R13 are hydrogen, alkyl, phenyl or substituted phenyl; and activated derivatives thereof are useful as intermediates in the preparation of matrix metalloproteinase inhibitors..
Patent ZA-937679-B (ZA)
Title: Bucket elevator conveyors
Inventor: CHORLTON DEREK CARR
IPC: B65G47/16
Filed: 1993-10-15
Abstract: PCT No. PCT/GB93/02139 Sec. 371 Date May 25, 1995 Sec. 102(e) Date May 25, 1995 PCT Filed Oct. 15, 1993 PCT Pub. No. WO94/10070 PCT Pub. Date May 11, 1994The bucket conveyor system is made up of buckets which are pivotally suspended between two chains and run around an endless circuit. The claims are made up of links being connected by pins in elongated holes. This chain can be compressed to make its length less than when it is under tension. The chain is compressed at the loading station to force the buckets into direct contact with each other and allow continuous 10 loading. At the discharge station the chain is put under tension to space the buckets and allow them to be rotated through 360 DEG  to empty out their contents. Guides are positioned at the areas where the chain is under compression to stop buckling from occurring. The system is driven by a motor and sprockets which also control the compression or tension of the chain.