baber/WOPTO huggingface dataset:
Patent DE-3566840-D1 (DE)
Title: Production of optical cable
Inventor: GILL RONALD YAXLEY
IPC: G02B6/44
Filed: 1985-07-24
Granted: 1989-01-19
Abstract: 57 In the production of an optical fibre cable a core (3) of thermoplastics material is extruded with a plurality of longitudinally-extending grooves (15) in its outer surface around an electrical conductor (1) and is initially cooled: then following the introduction of one or more fibres (11) in at least one of the grooves the core assembly is passed through an induction heating unit (17) in which the conductor is heated to an extent sufficient to soften at least the adjoining region of the core, and the core is twisted to cause the grooves to take up a helical or periodically reversing helical path, and is again cooled to leave the grooves in that condition.
Patent DE-3569330-D1 (DE)
Title: Construction of a supporting arm for dental purposes
Inventor: KIESEL HELMUT
IPC: A61C1/00
Filed: 1985-11-27
Granted: 1989-05-18
Abstract: The present invention is directed to a bracket structure which has one or more tubular members interconnected by elbow members. At least one of the tubular members is connected to an elbow member by a plug-type connection having a socket receiving a pin part with the socket and pin part being constructed so that no twisting will occur between the two parts in the assembled position but the two parts can be disassembled and reassembled with the position of the parts being rotated through at least 180 DEG  relative to each other. This provides the advantage of enabling easy changing of the bracket from being adapted for a floor mounting to a ceiling mounting.
Patent DE-3576682-D1 (DE)
Inventor: PANNHORST WOLFGANG DIPL PHYS
IPC: C03C4/10
Filed: 1985-10-26
Granted: 1990-04-26
Abstract: 1. A transparent, coloured glass-ceramic, containing high temperature quarz solid solution, which appears black in reflection and violet or brown to dark red in transmission, especially for the manufacture of heatable plates, characterized in that a change of the linear thermal expansion co-efficient and of the transmission, due to temperature stresses, is small, that the transmission in the IR region between 800 nm and 2,6 mu m can be variably adjusted, that the glass-ceramic comprises the following composition (in weight percent) : SiO2                  62-68 Al2 O3                19,5-22,5 Li2 O                 3,0-4,0 Na2 O                 0-1,0 K2 O                  0-1,0 BaO                   1,5-3,5 CaO                   0-1,0 MgO                   0-0,5 ZnO                   0,5-2,5 TiO2                  1,5-5,0 ZrO2                  0-3,0 MnO2                  0-0,40 Fe2 O3                0-0,20 CoO                   0-0,30 NiO                   0-0,30 V2 O5                 0-0,80 Cr2 O3                0-0,20 F                     0-0,20 Sb2 O3                0-2,0 As2 O3                0-2,0 SIGMA Na2 O+K2 O      0,5-1,5 SIGMA BaO+CaO         1,5-4,0 SIGMA TiO2 +ZrO2      3,5-5,5 SIGMA Sb2 O3 +As2 O3  0,5-2,5 wherein the coloring is enabled by combination of oxides from the group of V2 O5 , NiO, CoO, MnO2 , Fe2 O3 and Cr2 O3 , and that the glass-ceramic was transformed from this glass-ceramic starting glass by heat treatment between 680 degrees C and 920 degrees C.
Patent DE-3577329-D1 (DE)
Title: Waeschereinigungsmittel.
Inventor: RUPPERT RONALD M
IPC: C11D3/22
Filed: 1985-11-06
Granted: 1990-05-31
Abstract: A laundry detergent composition containing an effective amount of a soil release agent comprising a vinyl caprolactam resin and a standard detergent formulation.
Patent DE-3580230-D1 (DE)
Inventor: PETZOW GUENTER PROF DR
IPC: C22C29/14
Filed: 1985-09-02
Granted: 1990-11-29
Abstract: A process for the preparation of boron carbide/transition metal boride molded articles comprising hot pressing a mixture of from 25 to 75% by weight of boron carbide, from 15 to 40% by weight of boron, from 0 to 8% by weight of silicon, from 10 to 50% by weight of tungsten and/or titanium carbide, and from 0 to 6% by weight of cobalt.
Patent DE-3583266-D1 (DE)
Inventor: CHAO HUNG-YA
IPC: B01J13/16
Filed: 1985-07-29
Granted: 1991-07-25
Abstract: A method of microencapsulation is disclosed whereby two or more organic-in-aqueous emulsions, each containing a reactive component in the organic phase, are mixed together causing the reactive components to react and form polymeric walls around the organic droplets. Either, neither or both emulsions may contain one or more fill materials in their organic phase.
Patent DE-3583276-D1 (DE)
Inventor: GIANTURCO CESARE
IPC: A61M29/00
Filed: 1985-10-01
Granted: 1991-07-25
Abstract: An endovascular stent formed of stainless steel wire of 0.018 inches diameter and arranged in a closed zig-zag pattern. The stent is compressed into a reduced size shape of an outer diameter which is many times smaller than its expanded shape. The stent is positioned in a passageway in the vascular system by means of a sheath while the stent is retained in the compressed reduced size shape. A flat-ended catheter is used through the sheath to hold the stent in place in the passageway while the sheath is withdrawn from the passageway allowing the stent to expand in the passageway into its expanded shape to hold the passageway open and enlarged. Other possibfe applications of the stent are in the respiratory, biliary and urinary tracts to reinforce collapsing structures.
Patent DE-3660483-D1 (DE)
Title: Machine for extending rolled cloth
Inventor: TAGAWA KEIKO
IPC: B65H23/34
Filed: 1986-08-11
Granted: 1988-09-15
Abstract: The present invention relates to a machine for extending rolled cloth, which is used for unrolling rolled cloth, cutting the unrolled cloth into a fixed length and piling the cut cloth. The machine for extending rolled cloth comprises a carriage (10) provided with wheels (12) and a driving source, a rolled cloth-holding stand (20), a cloth-supplying stand (40) provided with a draw-out roller (17), a cutting device (30,31) and an ascending and descending means (4.5,6,7,8). During the cloth-extending operation, the cloth-supplying stand (40) and the cutting device (30,31) are moved up and down against the carriage (10) by the ascending and descending means (4.5.6.7.8) in accordance with the height of piled cloth.
Patent DE-3664012-D1 (DE)
Title: Phase control method for video recorder motors
Inventor: ZIMMERMANN HORST
IPC: G11B15/54
Filed: 1986-07-19
Granted: 1989-07-20
Abstract: 1. Method dor the phase regulation of motors in video recorders during the reproduction of vidéo signals recorded on a magnetic tape, using a phase comparison between a marking signal supplied by at least one mark applied to the head drum periphery and the control pulses recorded on a track of the magnetic tape, the desired phase of the control pulses being adjustable, characterized in that the head drum periphery comprises N marks and is subdivided into N region of equal size which are delimited by the marks and that curing a phase adjustment to a point P in a region n, with 1=< n =<N, the mark lying closest ot the point P' reflected centrally with respect to the head drum axis is used as reference for the phase measurement.
Patent DE-3668889-D1 (DE)
Inventor: BIGGE CHRISTOPHER F
IPC: C07D241/46
Filed: 1986-06-10
Granted: 1990-03-15
Abstract: There is disclosed a compound of Formula (I): 
<CHEM>
 or a pharmaceutically acceptable salt thereof, wherein
 R1 is hydrogen or methyl;
 R2 is oxygen, =N-Y-NR4R5, in which Y is cyclohexyl or a straight or branched alkylene of from one to six carbon atoms optionally substituted with hydroxyl, and in which R4 and R5 are independently hydrogen, or alkyl of from one to four carbon atoms, optionally substituted with hydroxyl, or R2 is =N(CH2)n-W in which n is zero or an integer of from one to four and W is a pyrrolidinyl or piperidinyl ring optionally substituted with alkyl of from one to four carbon atoms which may be further substituted with hydroxyl;
 R3 is hydroxy, alkoxy of from one to four carbon atoms -NH-Y min -NR4 min R5 min , in which Y min  is cyclohexyl or a straight or branched alkylene of from one to six carbon atoms optionally substituted with hydroxyl, and in which R4 min  and R5 min  are independently hydrogen, alkyl of from one to four carbon atoms optionally substituted with hydroxyl, or R3 is -NH(CH2)n min -W min  in which n min  is zero or an integer of from one to four and W min  is a pyrrolidinyl or piperidinyl ring optionally substituted with alkyl of from one to four carbon atoms which may be further substituted with hydroxyl;
 with the proviso that when R1 is hydrogen and R2 is oxygen, R3 may not be hydroxy or alkoxy. 
<??>The compounds are derived from 6-formyl-4,7,9-trihydroxy-1phenazinecarboxylic acid, methyl ester and from 6-formyl-4,7,9-trihydroxy-8-methyl-1phenazine-carboxylic acid; methyl ester and demonstrate anti-microbial and anti-neoplastic activity. 
<??>In addition a purified strain of Streptomyces galanosa, NRRL 15738, is capable of producing 6-formyl-4,7,9-trihydroxy-8-methyl-1 phenazinecarboxylic acid, methyl ester in isolable quantities from a fermentation broth containing assimilable sources of carbon and nitrogen.
Patent DE-3671358-D1 (DE)
Inventor: PANDOLFI ALBERTO
IPC: A47J31/24
Filed: 1986-10-17
Granted: 1990-06-28
Abstract: The present specification discloses an improved type of "Espresso" coffee machine where the means (22) for the production and distribution of hot water and steam are independent from the means (5) used for the production of the espresso coffee itself.In this way the construction of the "espresso" coffee machines is very simplified and is possible to easily assemble various type of machines to meet whatever customer's requirements.
Patent DE-3750818-D1 (DE)
Inventor: TSUTSUI TOSHIYUKI
IPC: C08F4/642
Filed: 1987-09-24
Granted: 1995-01-12
Abstract: Olefins is polymerisation process utilises a catalyst comprising (A) a solid catalyst component contg. transition metal (gp. (IVB) periodic table) cpds. carried on an inorganic carrier, (B) aluminoxane, (C) an organo-aluminium cpd. contg. hydrocarbon gps. excluding n-alkyl gps. The transition metal is pref. of Ti, Zr or Hf, esp. of formula R1kR2lR3mR4nMe (I) where R1 is a cycloalkadienyl gp., R2, R3 and R4 are the same or different and can be cycloalkadienyl, aryl, alkyl, aralkyl, cycloalkyl, halogen atom, H, ORa, SRb, or NRc2; Ra, Rb and Rc are independently alkyl, cycloalkyl, aryl, aralkyl or organosilyl; Me is Zr, Ti or Hf; k is 1, 2, 3 or 4; l, m, n are independently 0, 1, 2 or 3 and k+l+m+n=4. The aluminoxane is pref. of formula (II) or (III). where R is hydrocarbyl gp; X is halogen; a and b are each 0-80, but not both zero.
Patent DE-3767485-D1 (DE)
Inventor: BROCKMEYER W
IPC: B22D41/50
Filed: 1987-11-26
Granted: 1991-02-21
Abstract: A molten metal pouring cup is provided communicating with a transfer means for transferring molten metal from the pouring cup to a casting station. Vent means is provided on the pouring cup at the interface between the pouring cup and the transfer means to permit release of entrapped gas downstream of the pouring cup.
Patent DE-3771100-D1 (DE)
Inventor: GOSS JACK
IPC: A61M1/36
Filed: 1987-02-26
Granted: 1991-08-08
Abstract: There is provided an inexpensive disposable temperature monitoring probe for use in a patient treatment system wherein photoactivatable agents, in contact with patient cells, are irradiated extracorporeally to photoactivate said agents and then returned to the patient.
Patent DE-3771169-D1 (DE)
Inventor: NILSSON KARL-JOHAN
IPC: F22G1/00
Filed: 1987-10-22
Granted: 1991-08-08
Abstract: Power plant for combustion of fuel in a fluidized bed, primarily a PFBC power plant. The plant includes a multistage steam turbine (13) and an intermediate superheater (12) for superheating steam between the turbine stages. The combustion chamber (2) is divided into a first and a second part (2a, 2b) by a wall (4) having one or more openings (42) which take/takes up a minor part of the cross-section in the bed region and makes possible     a limited exchange of bed material. The first part (2a) includes a nest of boiler tubes (11) for generating steam. The second combustion chamber part (2b) includes a nest of boiler tubes (12) for intermediate superheating of steam between the turbine stages. The combustion chamber parts (2a, 2b) are each connected to a fuel supply system (20, 21, 22 and 23, 24, 25, respectively). The control of the superheating takes place by control means (62) which control the bed temperature in the second combustion chamber part (2b) by controlling the fuel supply to said combustion chamber part (2b). (Figure 2)
Patent DE-3772498-D1 (DE)
Inventor: ADLER-MOORE JILL
IPC: A61K9/127
Filed: 1987-08-14
Granted: 1991-10-02
Abstract: Formulations consisting of phospholipid small unilamellar particles encapsulating polyene antifungal antibiotics and methods for using such compositions to treat systemic fungal infections are described. In a preferred embodiment, the particles are in the form of vesicles which comprise a polyene antifungal antibiotic, preferably amphotericin B and/or nystatin, egg phosphatidylcholine and cholesterol, preferably in the molar ratio of about .2 (AMB):2(PL): 1(CHOL). These vesicles may also have an amine modified surface. The vesicles are suspended in a low ionic strength saccharide/tris solution at a pH of from about 6.0 to about 8.0 and may be administered to deliver the antifungal antibiotic to treat systemic fungal infections.
Patent DE-3778826-D1 (DE)
Inventor: DUPINAY PIERRE
IPC: A61K47/00
Filed: 1987-10-20
Granted: 1992-06-11
Abstract: The stable therapeutic composition comprises an active principle based on a hydrophobic vegetable oil, in combination with one or more polyoxyethylene glycols (PEG). It makes possible a very substantial improvement in the availability of the active principle from the pharmaceutical dosage form.
Patent DE-3780618-D1 (DE)
Inventor: ALDERDICE MARC T
IPC: A61K31/505
Filed: 1987-08-10
Granted: 1992-08-27
Abstract: Buspirone and its pharmaceutically acceptable salts are useful in the clinical improvement of short term memory.
Patent DE-3781842-D1 (DE)
Inventor: DIETZ ERWIN DR
IPC: C09K23/00
Filed: 1987-07-07
Granted: 1992-10-29
Abstract: Addn. cpds. and their salts (I) are claimed, and their prodn. by reaction of polyepoxide(s) of formula (II) with amine(s) (H2NR2)pNH2-pR1 (III) and at least one amine (IV) of formula (IV), R3NHR4, H2N-A-R4, or H2N-Aasterisk-NR3-Aq-R4, in amts. such that 1-99% of the epoxy gps. react with (III) and 99-1% with (IV); opt., the prod. is treated with acid. n = 2-10; R, R3 = H or 1-24C alkyl; X = 2,3-epoxypropyl residue; p = 0-2; R1 = opt. unsatd. 8-24C alkyl; R2 = 1-12C alkylene; Rasterisk forms a heterocyclic ring; R4 = 2-22C opt. unsatd. (poly)nuclear carbo- or hetero-cyclic system(s) (with CH2, O, S, CO, SO, SO2, or NH links), opt. substd. with R5, Hal, OR5, NR5R6 COOR5, CONR5R6, NR5COR6, CN, CF3, or NO2 (R5, R6 = H or 1-24C alkyl), or -R7-NR8R9 (R7 = 2-200C alkylene, opt. O-interrupted, and R8, R9 = H or 1-24C alkyl), or ((CHR10)yNR11)m(CHR10)yNR8R9 (IV) or (CHR10)yN((CHR10)yNR8R9)2 (y = 2-6; m = 1-6; R8, R9, R10, R11 = H or 1-24C alkyl), or R12OR13 (R12 = 2-30C alkylene, opt. interrupted by O or NR13; R13 = H or 1-24C alkyl); A = 1-30C alkylene; Aasterisk = 1-12C alkylene; q = 0 or 1.
Patent DE-3783041-D1 (DE)
Inventor: BABANIN BORIS IVANOVICH
IPC: C10B39/02
Filed: 1987-05-21
Granted: 1993-01-21
Abstract: Coke is formed by mixing a milled coal charge with coke at 600-1000 deg. C at a charge:coke wt. ratio of 1.3-2.6:1 in a direct flow regime such that the coke is cooled to 150-250 deg. C and the coal charge is heated to 120-240 deg. C. After the heat exchange the coke and coal charge are sepd. and the  heated coal charge is supplied to the coking operation.
Patent DE-3785145-D1 (DE)
Inventor: BOHN GERHARD DR
IPC: F16C39/06
Filed: 1987-08-08
Granted: 1993-05-06
Abstract: The rail vehicle has profiled track wheels (5) supporting the chassis (1) which has a pneumatic suspension system (3) for the carriage or waggon (2). The weight of the latter is partially compensated by a magnetic system (6,7) to reduce the load on the track wheels. This magnetic system uses an armature rail (6) extending alongside the track (4) cooperating with a pair of permanent magnet poles (7.1) attached to the chassis. An associated ferromagnetic core (8) exhibits a variable magnetic resistance to obtain the required load compensation.
Patent DE-3851769-D1 (DE)
Inventor: BERGER JOEL G
IPC: C07D223/32
Filed: 1988-03-24
Granted: 1994-11-17
Abstract: Disclosed herein are novel 1-substituted-2,3,4,5-tetrahydro-1H-3-benzazepines of the general formula I: <CHEM>  wherein R<1>, R<2>, R<3>, R<4> and R<5> are specified substituents.    R<1> is preferably -X<6>, -CHR<7>R<8>, cycloalkyl, cycloalkenyl, <CHEM> or pyrrolyl where m is 1, R<6> represents =H, phenyl, substituted phenyl, aralkyl, alkyl, cycloalkyl, haloalkyl or alkoxyalkyl, R<7> represents H or alkyl preferably H, R<8> represents cycloalkyl, cycloalkenyl, haloalkyl, alkoxyalkyl, alkenyl or alkynyl and R<9> represents alkyl, alkoxy or alkoxyalkyl.   R<2> preferably represents -H and R<3> -CH3, R<4> is preferably halogen and R<5> is preferably OH, OCO<.>R<9> or -O(CR<7>)2<.>OCO<.>R<1><3> where R<7> represents hydrogen, R<9> is as defined above and R<1><3> represents alkyl. The compounds of the formula I are indicated as being useful in the treatment of psychoses, depression and pain. Also disclosed are process for the preparation of the novel compounds as well as pharmaceutical compositions comprising them.
Patent DE-3860435-D1 (DE)
Inventor: NAEF WERNER
IPC: B08B5/02
Filed: 1988-02-05
Granted: 1990-09-13
Abstract: A method for the repair of the inside of installed conduits comprises the following method steps: drying of the inside of the line by flow-through of pre-dried compressed air, removal of interior coatings by flow-through of a mixture of compressed air and particles of an abrasive medium with a mean exterior diameter of >0.8 mm and a specific weight of >3.0 gxcm-3 in an amount of >1.0 gxm-3, the mixture flowing through the line with a mean speed of >10 mxs-1, relative to normal pressure, and blowing out the line by means of pre-dried compressed air. The adhesive resin utilized for the subsequent coating contains, among others, a solvent-free 2-component resin and at least 5% by weight of finely dispersed inorganic oxidic adhesives.
Patent DE-3867071-D1 (DE)
Inventor: SCHULZ NORBERT
IPC: B05D3/00
Filed: 1988-11-18
Granted: 1992-01-30
Abstract: The solns. or paint-overspray in painting of motor vehicles are treated by adding (A) nonionic surfactant, (B) as coagulating agent, waste metal oxide dust (I) resulting during handling of waste metal and like and/or in prepn. of steel, together with (C) small amt. of P2O5 but without addn. of flocculating agent. Pref.  (I) comprises approx. 85 wt.% ZnO, 8 wt.% Al2O3, 7 wt.% Fe2O3, Approx. 2 pts.wt. P2O5 and 0.2 pt.wt. surfactant are used per 100 pts.wt. (I), process is carried out at pH about 8.5. (I) is converted by addn. of liq. ethylene-propylene oxide into liq. phase then P2O5 is added.
Patent DE-3875901-D1 (DE)
Inventor: ESCARAVAGE BRUNO
IPC: G05D23/19
Filed: 1988-09-28
Granted: 1992-12-17
Abstract: The invention relates to heating by electrical resistors. 
<??>It provides for the use of switching systems, especially thyristors associated with electrical resistors, the functioning of which is to be controlled, for controlling them in the syncopated mode by means of an industrial computer, an industrial automatic programable mechanism or the like performing a set of functions which make it possible to calculate the powers to be dissipated, on the one hand, and to control the switching systems directly so as to dissipate the previously calculated powers, on the other hand. 
<??>The invention is used for controlling industrial furnaces and, more particularly, glass furnaces, especially furnaces for heating glass with a view to tempering and/or swelling the glass. 
<IMAGE>
Patent DE-3877631-D1 (DE)
Inventor: DURCHSCHLAG GERALD
IPC: B61L5/00
Filed: 1988-06-06
Granted: 1993-03-04
Abstract: A rail switch control mechanism including a locking clamp which is shiftable using a path rod. The locking clamp has, on an end facing the switch tonque, a swivel head. The swivel head is swivelably connected with a switch tongue. In use, the locking clamp cooperates with a locking piece. In the locked position of the clamp, a shoulder of the locking clamp contacts a shoulder of the locking piece. The switch tongue rail is linked to the swivel head with the interposition of a pin arranged with an elongated slot extending longitudinally of the tongue rail. The elongated slot is arranged within a connecting member which is rigidly connected to the switch tongue rail, e.g. by being threadedly connected, to the web of the switch tongue rail.
Patent DE-3878173-D1 (DE)
Inventor: HEINRICH RICHARD
IPC: F16J15/3276
Filed: 1988-11-18
Granted: 1993-03-18
Abstract: A radial shaft seal consists of a metallic body, a sealing part and a casing part.  The sealing part has a sealing lip and a dust lip and is made of a rubbery/elastomer; its pressure is exerted by a gaiter sprinq.  The casing is joined to the lip by confluence but consists of different material such as natural or rubber, thermoplastic or thermoelastic material.
Patent DE-3878804-D1 (DE)
Inventor: SOMMER ANDREAS DR
IPC: C09B67/08
Filed: 1988-09-15
Granted: 1993-04-08
Abstract: Pigment formulation contains pigment(s) (I) and colourless or slightly coloured s-triazine cpd(s). of formula (II). Q1-3 independently = -X-A, -OR1, -SR1, halogen -NR2R3 or one of these = 1-15 trivalent s-triazine gps. of formula (IIA) connected through the divalent W gp. to a free valency of the nxt (IIA) gp. the triazine ring of (II), whilst the other free valencies are satisfied by -X-A, -OR1, -SR1, halogen or -NR2R3; branched (II) contains at least one -X-A gp.; A = the radical of an aromatic ring system with 2-6 condensed rings and  at least 9C atoms; or the radical of a gp. of 2-3 bound aromatic ring systems, each with one ring or 2-4 condensed rings, each with 5-7 ring atoms/ring, in which the bound aromatic ring systems are bound by a direct bond or a divalent -O-, -S-, -CO-, -SO2- or 1-12C alkylene gp.;   W = a divalent -NRs-Y-NRt-, -O-Y-O-, -O-Y-NRs-, -S-Y-S-, -O-Y-S- or -NRs-Y-S- gp.; with Y = linear or branched 2-20C alkylene or 2-20C alkylene with -O-, -S-, -NRu- (Ru = H or 1-24C alkyl), -CO-, -SO-, -SO2-, 5-7C cycloalkylene, 5-10C arylene and/or 5-7-membered heterocyclic ring gp(s). in the chain and opt. with substits., or a divalent 1-, 2- or 3-ring satd., unsatd. or aromatic carbocyclic or heterocyclic ring system with 5-14 ring atoms or 2 of the ring systems linked through a direct bond or a 1-6C alkylene, -O-, -S-, -CO-, -SO- or -SO2- gp., in which the ring systems may be substd.; Rs and Rt independently = H, 1-24C alkyl, 1-6C hydroxyalkyl, (1-4C alkoxy)-1-6C alkyl
Patent DE-3883257-D1 (DE)
Inventor: BERG BRUCE
IPC: B66F9/18
Filed: 1988-11-18
Granted: 1993-09-16
Abstract: A drum clamping unit for plastics material drums with peripheral "L'8 chime rings below the drum head is adapted to be mounted on suitable lifting and transporting devices such as lift trucks, overhead cranes, and the like to automatically engage, latch onto, and discharge one or more of the molded plastics material drums without damaging the drums. The unit has a plurality of clamping jaws automatically triggered to clamping positions by the drum heads as the unit is lowered alongside the drums. These clamping jaws are positioned to engage only with the bottom and inner face of the "L" chime ring of each drum and remain clear of the drum head and drum periphery thereby avoiding any damage to the drums especially as they are raised to clamp onto the "L" rings. Then, when the raised clamped drums are conveyed to and lowered on a desired location, the jaws are released, retracted automatically and held in a retracted position until the unit is again lowered to engage a drum head in a subsequent operation. A preferred unit handles up to four upright drums positioned in a ring cluster or nest.