US3042998A - Slip ring assembly - Google Patents

Slip ring assembly Download PDF

Info

Publication number
US3042998A
US3042998A US732749A US73274958A US3042998A US 3042998 A US3042998 A US 3042998A US 732749 A US732749 A US 732749A US 73274958 A US73274958 A US 73274958A US 3042998 A US3042998 A US 3042998A
Authority
US
United States
Prior art keywords
rings
slip ring
tube
ring assembly
assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US732749A
Inventor
Sweett Henry Charles
Parsley Charles Herbert Arthur
Smith Jack
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sperry Gyroscope Co Ltd
Original Assignee
Sperry Gyroscope Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sperry Gyroscope Co Ltd filed Critical Sperry Gyroscope Co Ltd
Application granted granted Critical
Publication of US3042998A publication Critical patent/US3042998A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/10—Manufacture of slip-rings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine
    • Y10T29/49011—Commutator or slip ring assembly

Definitions

  • the invention relates to multiple slip ring assemblies, the slip rings being of small diameter, and the assembly required to be sized within close limits.
  • the invention consists of a method of making-a slip ring assembly in which a num ber of rings are cut from a single tube which has been formed with one or more internal keys or keyways, and are keyed on to support means of insulating material.
  • the invention consists of a method of making a slip ring assembly in which a number of rings are machined while keyed in to an insulator or insulators supported by a rigid reference member.
  • a further aspect of the invention consists of a method of making a slip ring assembly in which a metal tube supported by a portion of the partially completed assembly is cut into space-d lengths, each of which lengths forms a separate slip ring of the finished assembly in the position it will have in the finished assembly.
  • a fourth aspect of the invention consists of a slip ring assembly consisting of a number of rings keyed on to support means of insulating material, in which the rings are spaced from one another and a Wire lies in each of one or more slots or channels formed in the support means, and each wire is connected to a different one of the rings.
  • Another aspect of the invention consists of a slip ring assembly consisting of a number of rings keyed on to an insulator or insulators supported by a rigid reference member, in which the rings are spaced from one an other, and a wire lies in each of one or more slots or channels formed in or defined by the insulator or insulators, and each wire is connected to a different one of the said rings.
  • FIGURE 1 is a scrap perspective view, partly cut away, of an embodiment of the invention. 7
  • FIGURE 2 is an elevation of the embodiment shown in FIGURE 1.
  • FIGURE 3 shows a cross section taken at the position marked AA (FIG. 2).
  • the slip ring assembly consists of a steel reference rod surrounded by an epoxy-resin sleeve, supporting and insulating from each other, a series of plated brass slip rings.
  • the wire connections of the slip rings are led inside the epoxy-resin sleeve parallel to the axis of the rod, and emerge at one end of the assembly.
  • the slip ring assembly is supported with one end coaxially mounted in the bore of the central pivot of a ball bearing assembly.
  • a steel reference rod 1 having centres at each end has a cylindrical sleeve 2 formed of an epoxy-resin, moulded around it.
  • the sleeved rod is held in a gear cutting machine by the centres, and is machined to form equispaced splines 3 around the cylindrical surface of the epoxyresin sleeve, which splines are cut parallel with the axis of the rod, and are in number equal to the number of nited States Patent p 3,042,998 Patented July '10, 1 962 the tube are truncated so that when the tube is pressfitted over the splined epoxy-resin sleeve, hollow channels 6 are formed between the tips of the truncated splines the sides of the epoxy-resin splines and the spline roots between them.
  • the broach used to cut the splines in the bore of the tube is machined by the same cutter used to machine the splines on the epoxy-resin sleeve.
  • the assembly is again set up between centres and a number of circumferential grooves are machined in the periphery of the brass tube to divide the tube into spaced rings, each coaxial with the reference rod. These rings form the slip rings 4 in the completed assembly.
  • the grooves are cut slightly deeper than the thickness of the tube and a little way into the epoxy-resin sleeve. This helps to throw up burrs which assist in holding the rings against axial movements, while the splines hold the rings against any rotary movement.
  • a wire 7 is passed down each of the hollow channels 6 from one end, and each wire is bent up and soldered to the side of a different one of the rings.
  • the wires are tied down to the bottom of the channels with silk thread so that the wires are held away from contact with the rings except where they are bent up and soldered.
  • An epoxy-resincoating 8 is then moulded round the ringed and resin-coated rod, and fills the gaps between the rings.
  • the outer layers are machined away until the brass rings, which are now held firmly in position and insulated from each other, are exposed, and are of the required outside diameter.
  • One end of the slip ring assembly is machined to be a pushfit into the bore of a pivot 9 (FIG. 2) which is to support the assembly.
  • the slip rings are nickel-plated and then rhodium-plated, and the prepared end of the slip ring assembly thrust into the pivot bore and secured, for example, with an adhesive.
  • Advantages provided by this embodiment are an economy of space, and a rigid reference rod to reduce any tendency to fracture or flex while being machined.
  • a further advantage provided by the embodiment is that no expensive metal rings are required to build up an assembly.
  • a modification of the above described embodiment includes a rigid reference tube instead of the steel reference rod, the connecting wires to the slip rings being passed through holes radially drilled in the tube circumference, and then passed along the length of the tube and incomplete in the path of the brush so that a switching action occurs as the assembly rotates.
  • the discontinuity is readily formed by radially drilling a hole of appropriate diameter, and at the required position, in the tube before the rings are separated from each other. The discontinuity should not extend across the full width of the ring but a narrow neck should be left to help the ring to keep its shape.
  • a method of making a slip ring assembly including the steps of forming a predetermined number parallel longitudinal splines along the outer curved surface of a cylindrical support member, said outer surface comprising electrical insulating material, forming an equal number of truncated parallel longitudinal splines along the inner cylindrical surfiace of a hollow conductive tube for mating with said splines on said support member to form a secure fit, said truncated splines forming hollow channels between the tips of said truncated splines and said support member when said support member and said tube are fitted together, fitting said support member within said tube by mating their respective splines to form said longitudinal hollow channels and to render said support member and said tube coaxial, said fitting also prevents rotation of said tube relative to said support member, cutting said tube into spaced lengths along the longitudinal axis thereof whereby each of said lengths forms a separate slip ring in the position it will have in the finished assembly, inserting a separate wire into each of a number of said hollow longitudinal channels, each wire
  • a method of making a slip ring assembly as claimed in claim 1 including the step of cutting slightly deeper than the thickness of said tube and into said support member to assist in holding the slip rings against movement.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Earth Drilling (AREA)

Description

y 1962 H. c. SWEETT Em 3,0429% SLIP RING ASSEMBLY Filed May 2, 1958 INVENII'ORS JACK My ATTORNEY The invention relates to multiple slip ring assemblies, the slip rings being of small diameter, and the assembly required to be sized within close limits.
.According to one aspect the invention consists of a method of making-a slip ring assembly in which a num ber of rings are cut from a single tube which has been formed with one or more internal keys or keyways, and are keyed on to support means of insulating material.
According to a second aspect the invention consists of a method of making a slip ring assembly in which a number of rings are machined while keyed in to an insulator or insulators supported by a rigid reference member.
A further aspect of the invention consists of a method of making a slip ring assembly in which a metal tube supported by a portion of the partially completed assembly is cut into space-d lengths, each of which lengths forms a separate slip ring of the finished assembly in the position it will have in the finished assembly.
A fourth aspect of the invention consists of a slip ring assembly consisting of a number of rings keyed on to support means of insulating material, in which the rings are spaced from one another and a Wire lies in each of one or more slots or channels formed in the support means, and each wire is connected to a different one of the rings.
Another aspect of the invention consists of a slip ring assembly consisting of a number of rings keyed on to an insulator or insulators supported by a rigid reference member, in which the rings are spaced from one an other, and a wire lies in each of one or more slots or channels formed in or defined by the insulator or insulators, and each wire is connected to a different one of the said rings.
In order that the invention may be clearly understood and readily carried into practice, an embodiment thereof will now be described by way of example only, with reference to the accompanying drawings.
In the drawings:
FIGURE 1 is a scrap perspective view, partly cut away, of an embodiment of the invention. 7
FIGURE 2 is an elevation of the embodiment shown in FIGURE 1. I
FIGURE 3 shows a cross section taken at the position marked AA (FIG. 2).
In one embodiment the slip ring assembly consists of a steel reference rod surrounded by an epoxy-resin sleeve, supporting and insulating from each other, a series of plated brass slip rings. The wire connections of the slip rings are led inside the epoxy-resin sleeve parallel to the axis of the rod, and emerge at one end of the assembly.
The slip ring assembly is supported with one end coaxially mounted in the bore of the central pivot of a ball bearing assembly.
In making one embodiment of the invention (FIG. 1) a steel reference rod 1 having centres at each end has a cylindrical sleeve 2 formed of an epoxy-resin, moulded around it. The sleeved rod is held in a gear cutting machine by the centres, and is machined to form equispaced splines 3 around the cylindrical surface of the epoxyresin sleeve, which splines are cut parallel with the axis of the rod, and are in number equal to the number of nited States Patent p 3,042,998 Patented July '10, 1 962 the tube are truncated so that when the tube is pressfitted over the splined epoxy-resin sleeve, hollow channels 6 are formed between the tips of the truncated splines the sides of the epoxy-resin splines and the spline roots between them. To ensure correct fitting of the splines of the epoxy-resin sleeve with the internal splines on the brass tube, the broach used to cut the splines in the bore of the tube is machined by the same cutter used to machine the splines on the epoxy-resin sleeve.
The assembly is again set up between centres and a number of circumferential grooves are machined in the periphery of the brass tube to divide the tube into spaced rings, each coaxial with the reference rod. These rings form the slip rings 4 in the completed assembly. The grooves are cut slightly deeper than the thickness of the tube and a little way into the epoxy-resin sleeve. This helps to throw up burrs which assist in holding the rings against axial movements, while the splines hold the rings against any rotary movement. A wire 7 is passed down each of the hollow channels 6 from one end, and each wire is bent up and soldered to the side of a different one of the rings. Between certain adjacent rings the wires are tied down to the bottom of the channels with silk thread so that the wires are held away from contact with the rings except where they are bent up and soldered. An epoxy-resincoating 8 is then moulded round the ringed and resin-coated rod, and fills the gaps between the rings. After the resin has set, the outer layers are machined away until the brass rings, which are now held firmly in position and insulated from each other, are exposed, and are of the required outside diameter. One end of the slip ring assembly is machined to be a pushfit into the bore of a pivot 9 (FIG. 2) which is to support the assembly. The slip rings are nickel-plated and then rhodium-plated, and the prepared end of the slip ring assembly thrust into the pivot bore and secured, for example, with an adhesive.
Advantages provided by this embodiment are an economy of space, and a rigid reference rod to reduce any tendency to fracture or flex while being machined.
A further advantage provided by the embodiment is that no expensive metal rings are required to build up an assembly.
A modification of the above described embodiment includes a rigid reference tube instead of the steel reference rod, the connecting wires to the slip rings being passed through holes radially drilled in the tube circumference, and then passed along the length of the tube and incomplete in the path of the brush so that a switching action occurs as the assembly rotates. The discontinuity is readily formed by radially drilling a hole of appropriate diameter, and at the required position, in the tube before the rings are separated from each other. The discontinuity should not extend across the full width of the ring but a narrow neck should be left to help the ring to keep its shape.
What is claimed is:
1. A method of making a slip ring assembly including the steps of forming a predetermined number parallel longitudinal splines along the outer curved surface of a cylindrical support member, said outer surface comprising electrical insulating material, forming an equal number of truncated parallel longitudinal splines along the inner cylindrical surfiace of a hollow conductive tube for mating with said splines on said support member to form a secure fit, said truncated splines forming hollow channels between the tips of said truncated splines and said support member when said support member and said tube are fitted together, fitting said support member within said tube by mating their respective splines to form said longitudinal hollow channels and to render said support member and said tube coaxial, said fitting also prevents rotation of said tube relative to said support member, cutting said tube into spaced lengths along the longitudinal axis thereof whereby each of said lengths forms a separate slip ring in the position it will have in the finished assembly, inserting a separate wire into each of a number of said hollow longitudinal channels, each wire having a diameter smaller than that of its channel connecting each wire to a diiferent one of said slip rings and filling the spaces between said slip rings with an electrical insulating material.
2. A method of making a slip ring assembly as claimed in claim 1 including the step of cutting slightly deeper than the thickness of said tube and into said support member to assist in holding the slip rings against movement.
References Cited in the file of this patent UNITED STATES PATENTS Ferris Oct. 15, Evans June 11, Hawksley Mar. 10, Stevens J an. 4, Hiensch June 3, Krantz Dec. 9, Moeller Apr. 13, Anderson Mar. 2, Isaacson Apr. 1-, Nippert Apr. 8, Nippert Mar. 9, Pandapas Dec. 7, Frisbie et al. Aug. 30, Austen Mar. 17, Berkelhamer Mar. 31,
axial
US732749A 1957-05-06 1958-05-02 Slip ring assembly Expired - Lifetime US3042998A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3042998X 1957-05-06

Publications (1)

Publication Number Publication Date
US3042998A true US3042998A (en) 1962-07-10

Family

ID=10920374

Family Applications (1)

Application Number Title Priority Date Filing Date
US732749A Expired - Lifetime US3042998A (en) 1957-05-06 1958-05-02 Slip ring assembly

Country Status (1)

Country Link
US (1) US3042998A (en)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3151384A (en) * 1960-12-19 1964-10-06 Honeywell Regulator Co Method of making electrical collector means
US3178804A (en) * 1962-04-10 1965-04-20 United Aircraft Corp Fabrication of encapsuled solid circuits
US3243866A (en) * 1962-02-20 1966-04-05 Poly Scient Corp Method of making a miniature slip-ring assembly
US3246725A (en) * 1963-09-03 1966-04-19 United Electrodynamics Inc Clutch and/or brake type coupling
US3508097A (en) * 1966-12-30 1970-04-21 Caterpillar Tractor Co Lead retaining slip ring assembly
US3686514A (en) * 1971-07-16 1972-08-22 Ney Co J M Slip ring assembly
US4080540A (en) * 1973-10-08 1978-03-21 Canon Kabushiki Kaisha Low-powdered stepping motor
US4406961A (en) * 1981-05-27 1983-09-27 Robert Bosch Gmbh Slip ring assembly
US4668888A (en) * 1985-07-25 1987-05-26 Mabuchi Motor Co.,Ltd. Commutator arrangement for a miniature motor
US4870311A (en) * 1988-10-11 1989-09-26 Honeywell Inc. Wireless slip ring assembly
US5124608A (en) * 1991-01-25 1992-06-23 Quality Aero Technology, Inc. Low-noise slip ring assembly
US5557975A (en) * 1992-09-15 1996-09-24 Crane Electronics Limited Torque transducers
US5734218A (en) * 1996-05-13 1998-03-31 Litton Systems, Inc. Electrical slip ring and method of manufacturing same
US20020130568A1 (en) * 2001-03-15 2002-09-19 Ludwig Angerpointner Slip ring unit with a printed circuit board
CZ301293B6 (en) * 2000-02-25 2010-01-06 Pantrac Gmbh Slip-rings for electric motors and generators and method of rearranging the slip ring bodies
US20110053386A1 (en) * 2009-09-03 2011-03-03 Shenzhen Futaihong Precision Industry Co., Ltd. Universal connector and electronic device using the same
EP2270919A3 (en) * 2003-02-19 2011-04-06 Moog Inc. Broadband high-frequency slip ring system
US20120080227A1 (en) * 2009-06-02 2012-04-05 National Oilwell Varco, L.P. Wireless transmission system and system for monitoring a drilling rig operation
WO2014072355A1 (en) * 2012-11-07 2014-05-15 Wobben Properties Gmbh Slip ring assembly, slip ring shaft of a slip ring assembly, insulating body of a slip ring assembly and slip ring of a slip ring assembly
US9385495B1 (en) 2014-01-31 2016-07-05 Andrea Angelo Hilbert Weight supporting slip ring
US9546545B2 (en) 2009-06-02 2017-01-17 National Oilwell Varco, L.P. Multi-level wellsite monitoring system and method of using same

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1731892A (en) * 1927-05-31 1929-10-15 Westinghouse Electric & Mfg Co Insulated collector
US2004784A (en) * 1933-12-13 1935-06-11 Gen Electric Bushing
US2033633A (en) * 1934-07-21 1936-03-10 Anaconda Wire & Cable Co Method of assembling antenna members
US2104141A (en) * 1936-09-09 1938-01-04 Jr Brooks Stevens Method of manufacturing commutators
US2244009A (en) * 1938-09-02 1941-06-03 Philips Nv Electrical apparatus
US2265846A (en) * 1940-11-15 1941-12-09 Bell Telephone Labor Inc Swivel connector
US2316652A (en) * 1942-03-23 1943-04-13 Knapp Monarch Co Commutator structure and method of forming the segments thereof
US2436949A (en) * 1943-07-24 1948-03-02 Alf E Anderson Swivel electrical connector with floatable means
US2516880A (en) * 1946-03-27 1950-08-01 Max A Isaacson Commutator and method of making same
US2592172A (en) * 1947-06-13 1952-04-08 Paul W Nippert Method of manufacturing commutators
US2671865A (en) * 1951-04-17 1954-03-09 Nippert Electric Products Comp Electrical collector ring assembly
US2696570A (en) * 1951-05-23 1954-12-07 Electro Tec Corp Element of mechanism for conducting electricity between relatively movable structures
US2716269A (en) * 1945-08-21 1955-08-30 Gilbert Co A C Method of bushing frangible bodies to make fractureproof
US2877540A (en) * 1956-03-22 1959-03-17 Ncr Co Method of making magnetic data storage devices
US2880296A (en) * 1954-09-23 1959-03-31 David T Siegel Electrical resistor and method of making same

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1731892A (en) * 1927-05-31 1929-10-15 Westinghouse Electric & Mfg Co Insulated collector
US2004784A (en) * 1933-12-13 1935-06-11 Gen Electric Bushing
US2033633A (en) * 1934-07-21 1936-03-10 Anaconda Wire & Cable Co Method of assembling antenna members
US2104141A (en) * 1936-09-09 1938-01-04 Jr Brooks Stevens Method of manufacturing commutators
US2244009A (en) * 1938-09-02 1941-06-03 Philips Nv Electrical apparatus
US2265846A (en) * 1940-11-15 1941-12-09 Bell Telephone Labor Inc Swivel connector
US2316652A (en) * 1942-03-23 1943-04-13 Knapp Monarch Co Commutator structure and method of forming the segments thereof
US2436949A (en) * 1943-07-24 1948-03-02 Alf E Anderson Swivel electrical connector with floatable means
US2716269A (en) * 1945-08-21 1955-08-30 Gilbert Co A C Method of bushing frangible bodies to make fractureproof
US2516880A (en) * 1946-03-27 1950-08-01 Max A Isaacson Commutator and method of making same
US2592172A (en) * 1947-06-13 1952-04-08 Paul W Nippert Method of manufacturing commutators
US2671865A (en) * 1951-04-17 1954-03-09 Nippert Electric Products Comp Electrical collector ring assembly
US2696570A (en) * 1951-05-23 1954-12-07 Electro Tec Corp Element of mechanism for conducting electricity between relatively movable structures
US2880296A (en) * 1954-09-23 1959-03-31 David T Siegel Electrical resistor and method of making same
US2877540A (en) * 1956-03-22 1959-03-17 Ncr Co Method of making magnetic data storage devices

Cited By (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3151384A (en) * 1960-12-19 1964-10-06 Honeywell Regulator Co Method of making electrical collector means
US3243866A (en) * 1962-02-20 1966-04-05 Poly Scient Corp Method of making a miniature slip-ring assembly
US3178804A (en) * 1962-04-10 1965-04-20 United Aircraft Corp Fabrication of encapsuled solid circuits
US3246725A (en) * 1963-09-03 1966-04-19 United Electrodynamics Inc Clutch and/or brake type coupling
US3508097A (en) * 1966-12-30 1970-04-21 Caterpillar Tractor Co Lead retaining slip ring assembly
US3686514A (en) * 1971-07-16 1972-08-22 Ney Co J M Slip ring assembly
US4080540A (en) * 1973-10-08 1978-03-21 Canon Kabushiki Kaisha Low-powdered stepping motor
US4406961A (en) * 1981-05-27 1983-09-27 Robert Bosch Gmbh Slip ring assembly
US4668888A (en) * 1985-07-25 1987-05-26 Mabuchi Motor Co.,Ltd. Commutator arrangement for a miniature motor
US4870311A (en) * 1988-10-11 1989-09-26 Honeywell Inc. Wireless slip ring assembly
US5124608A (en) * 1991-01-25 1992-06-23 Quality Aero Technology, Inc. Low-noise slip ring assembly
US5557975A (en) * 1992-09-15 1996-09-24 Crane Electronics Limited Torque transducers
US5734218A (en) * 1996-05-13 1998-03-31 Litton Systems, Inc. Electrical slip ring and method of manufacturing same
CZ301293B6 (en) * 2000-02-25 2010-01-06 Pantrac Gmbh Slip-rings for electric motors and generators and method of rearranging the slip ring bodies
US7002269B2 (en) 2001-03-15 2006-02-21 Ltn Servotechnik Gmbh Slip ring unit with a printed circuit board
US20040164642A1 (en) * 2001-03-15 2004-08-26 Ludwig Angerpointner Slip ring unit with a printed circuit board
US20060003604A1 (en) * 2001-03-15 2006-01-05 Ltn Servotechnik Gmbh: Slip ring unit with a printed circuit board
DE10112895A1 (en) * 2001-03-15 2002-09-19 Ltn Servotechnik Gmbh Slip ring unit with a circuit board
US20020130568A1 (en) * 2001-03-15 2002-09-19 Ludwig Angerpointner Slip ring unit with a printed circuit board
DE10112895B4 (en) * 2001-03-15 2011-09-29 Ltn Servotechnik Gmbh Slip ring unit with a printed circuit board
US6768233B2 (en) 2001-03-15 2004-07-27 Ltn Servotechnik Gmbh Slip ring unit with a printed circuit board
EP2270919A3 (en) * 2003-02-19 2011-04-06 Moog Inc. Broadband high-frequency slip ring system
US9133668B2 (en) * 2009-06-02 2015-09-15 National Oilwell Varco, L.P. Wireless transmission system and system for monitoring a drilling rig operation
US20120080227A1 (en) * 2009-06-02 2012-04-05 National Oilwell Varco, L.P. Wireless transmission system and system for monitoring a drilling rig operation
US9546545B2 (en) 2009-06-02 2017-01-17 National Oilwell Varco, L.P. Multi-level wellsite monitoring system and method of using same
US20110053386A1 (en) * 2009-09-03 2011-03-03 Shenzhen Futaihong Precision Industry Co., Ltd. Universal connector and electronic device using the same
US8070494B2 (en) * 2009-09-03 2011-12-06 Shenzhen Futaihong Precision Industry Co., Ltd. Universal connector and electronic device using the same
WO2014072355A1 (en) * 2012-11-07 2014-05-15 Wobben Properties Gmbh Slip ring assembly, slip ring shaft of a slip ring assembly, insulating body of a slip ring assembly and slip ring of a slip ring assembly
CN104782002A (en) * 2012-11-07 2015-07-15 乌本产权有限公司 Slip ring assembly, slip ring shaft of a slip ring assembly, insulating body of a slip ring assembly and slip ring of a slip ring assembly
AU2013343635B2 (en) * 2012-11-07 2016-08-11 Wobben Properties Gmbh Slip ring transducer
KR20150082551A (en) * 2012-11-07 2015-07-15 보벤 프로퍼티즈 게엠베하 Slip ring assembly, slip ring shaft of a slip ring assembly, insulating body of a slip ring assembly and slip ring of a slip ring assembly
TWI577096B (en) * 2012-11-07 2017-04-01 渥班資產公司 Slip ring assembly
CN104782002B (en) * 2012-11-07 2017-06-23 乌本产权有限公司 The slip ring of slip-ring body, the slip ring axle, the insulator of slip-ring body and slip-ring body of slip-ring body
US9742135B2 (en) 2012-11-07 2017-08-22 Wobben Properties Gmbh Slip ring transducer
RU2641670C2 (en) * 2012-11-07 2018-01-19 Воббен Пропертиз Гмбх Contact ring body, contact ring shaft of contact ring body, insulating body of contact ring body and contact ring of contact ring body
US9385495B1 (en) 2014-01-31 2016-07-05 Andrea Angelo Hilbert Weight supporting slip ring

Similar Documents

Publication Publication Date Title
US3042998A (en) Slip ring assembly
US4689882A (en) Hand tool and method for removing insulation from wire-wound ignition cable
JP3569658B2 (en) Assembly method of coaxial multipolar plug and coaxial multipolar plug
US4559464A (en) Molded commutator and method of manufacture
US4059893A (en) Coaxial cable cutting tool
DE69806179T2 (en) WIRE GUIDE ARRANGEMENT FOR THE ELECTRIC MACHINE ROTOR
EP0077941B1 (en) A method of making a pin member for electrical connectors
WO2015052737A1 (en) Method of manufacturing a coaxial electric resistance and coaxial electric resistance
US2696658A (en) Method of manufacturing electric machine commutators
JPS6412068B2 (en)
US4456846A (en) Commutator assembly
US1883736A (en) Method of making commutators
US1951654A (en) Method of making a cable connecter
US3376443A (en) Commutator and method of making
US2658980A (en) Electric resistance
EP0325353B1 (en) A commutator
US1932391A (en) Mold for making armatures
US2348511A (en) Commutator and process of manufacture
US2477455A (en) Electric commutator
US2836837A (en) Tool for stripping wire and making an insulated wrapped connection
US3103060A (en) Commutator
US2826707A (en) Commutators for dynamo-electric machines
US2845556A (en) Commutator
US3535776A (en) Method of manufacturing a multi-segment commutator
US3485079A (en) Method for forming parallel square and taper-ended flexible shafting