Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
  • B29C65/66—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined
  • B29C65/68—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by liberation of internal stresses, e.g. shrinking of one of the parts to be joined using auxiliary shrinkable elements
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/01—General aspects dealing with the joint area or with the area to be joined
  • B29C66/05—Particular design of joint configurations
  • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
  • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
  • B29C66/114—Single butt joints
  • B29C66/1142—Single butt to butt joints
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/01—General aspects dealing with the joint area or with the area to be joined
  • B29C66/05—Particular design of joint configurations
  • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
  • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
  • B29C66/128—Stepped joint cross-sections
  • B29C66/1282—Stepped joint cross-sections comprising at least one overlap joint-segment
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/01—General aspects dealing with the joint area or with the area to be joined
  • B29C66/05—Particular design of joint configurations
  • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
  • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
  • B29C66/128—Stepped joint cross-sections
  • B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
  • B29C66/12841—Stepped joint cross-sections comprising at least one butt joint-segment comprising at least two butt joint-segments
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
  • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
  • B29C66/00—General aspects of processes or apparatus for joining preformed parts
  • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
  • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
  • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
  • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
  • F16B3/00—Key-type connections; Keys
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01C—RESISTORS
  • H01C1/00—Details
  • H01C1/01—Mounting; Supporting
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01C—RESISTORS
  • H01C10/00—Adjustable resistors
  • H01C10/16—Adjustable resistors including plural resistive elements
  • H01C10/20—Contact structure or movable resistive elements being ganged
• • 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
  • Y10T403/00—Joints and connections
  • Y10T403/48—Shrunk fit
• • 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
  • Y10T403/00—Joints and connections
  • Y10T403/57—Distinct end coupler
• • 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
  • Y10T403/00—Joints and connections
  • Y10T403/66—Interfitted members with external bridging piece

Definitions

• the invention relates to a device for connecting housing parts of potentiometers which are placed alongside one another on a contact surface, in which case, more preferably
• Potentiometer shaft of all potentiometers which gives output zero.
• the potentiometer resistors are located in flat, circular housing parts that are placed on top of one another and rotated against each other for adjustment.
• the potentiometer shaft with all grinders extends through all these housing parts. In the adjusted position, the housing parts are then tightened by the tensioning straps.
• the radially protruding clamps are disturbing in this type of connection.
• the tightening of the straps is also labor intensive. It must be done with great care to avoid misalignment during the tightening process.
• the clamps with clamps are also relatively expensive.
• shrink sleeves are known. They consist of a material that contracts continuously when heated. Such shrink sleeves are used, for example, to secure solder joints: A piece of shrink sleeve is also pushed over the solder joint and then heated. It then contracts tightly and adapts to the shape of the enclosed parts. In this way, the solder joint is covered watertight and relieved of strain. Materials of this type are described in US-A-2 027 962 and US-A-3 086 242. It is also known to connect parts to one another by means of a material which contracts strongly during heating.
• DE-B-1 024 838 shows a pipe connection for sewer pipes, in which a sleeve bridging the pipe joint consists of a plastic that contracts after application to the pipe end to be enclosed when heat is applied.
• the shrink fit also lies on the outer surface of the pipe ends.
• an outwardly projecting flange or a bead is provided at each pipe end, the shrink tube reaching around these flanges or beads.
• the connection is either frictional in the axial direction or has flanges or the like protruding outwards over the pipe surface. on.
• the angular position of the pipe ends in relation to the pipe axis is not critical.
• US Pat. No. 3,513,429 discloses actuators which respond to heat and which have a part which is elongated in a longitudinal direction and can be shrunk by heat and which accommodates two contact members. When exposed to heat, this changes bare part its length and thereby causes the contact members to be moved towards each other.
• the heat-shrinkable part can also be rotated in the circumferential direction, so that it causes a relative rotary movement of the contact members under the action of heat.
• the invention has for its object to construct a device of the type mentioned with simple means so that no radially projecting clamps or the like. occur.
• the parts to be connected to one another each have a recess on their outer surfaces along the contact surfaces and at a distance from these contact surfaces, so that a collar is formed between the two recesses,
• the lateral surface of the collar has a reduced diameter compared to the outer surfaces of the housing parts to be connected
• the tensioned band is also formed by a shrink fit which, when shrunk, engages in the punctures and around the collar.
• the punctures form a collar in between, which faces the outside surface of the housing parts is set back inwards.
• the shrink sleeve reaches into the punctures and around the two-part waistband.
• the housing parts are held together positively in the axial direction. There are no parts that protrude beyond the lateral surfaces of the housing parts.
• the lateral surface of the collar is expediently provided with knurling.
• FIG. 1 shows, in perspective, in section a partial view of a device for connecting rotating parts such as potentiometer levels with a shrink tube before the shrinking process.
• Fig. 2. shows a partial view corresponding to Fig.! after the shrinking process.
• Two potentiometer levels with flat, circular housing parts 10 and 12 are to be connected to one another.
• the two housing parts 10 and 12 in Fig.! and 2 cylindrike and cut through in the middle, Fig.l and 2 show only a section on one side and in the area of the contact surfaces 14,16.
• the two housing parts 10 and 12 are rotating bodies and can be rotated relative to one another about their axis (not shown).
• the contact surfaces 14 and 16 are complementary to each other so that the two housing parts 10 and 12 are centered on each other.
• the outer surfaces 18 and 20 of the two housing parts 10 and 12 are cylindrical and have the same diameter.
• potentiometer windings are located in the housing parts 10 and 12 coaxially to the axis of the housing parts, which are now rotatable with the housing parts for adjustment purposes relative to the potentiometer shaft with the wipers.
• the housing parts 10 and 12 have a recess 22 and 24 on their outer surface 18 and 20 along the contact surfaces 14 and 16 and at a distance from these contact surfaces Edges 26 and 28 form a collar 30.
• the outer surface 32 of the collar 30 has a reduced diameter compared to the outer surfaces 18, 20.
• the outer surface 32 of the collar 30 is provided with a knurling 34.
• the knurling 34 is formed by axial notches distributed uniformly over the lateral surface 32.
• the two housing parts 10 and 12 are connected by a shrink fit 36, which is shown in FIG. is shown in the unshrunk state.
• the distance between the mutually facing, radially projecting outer side surfaces 38 and 40 of the one and the other recess 22 and 24, respectively, is equal to the width of the unshrunk shrink fit 36.
• the housing parts 10 and 12 described are, as described above, adjusted to each other.
• a shrink wrap 36 is then also slipped over the housing parts 10 and 12.
• the inside diameter of the shrink sleeve 36 is chosen to be slightly smaller than the diameter of the outer surfaces 18 and 20.
• the shrink sleeve 36 is therefore expanded elastically when slipped over and then engages between the side surfaces 38 and 40.
• the shrink fit also then sits on the collar 30 and is held at its edges between the side surfaces 38 and 40.
• the shrink tube 36 is thus held and guided radially and laterally, so that the shrinking process cannot take place in an undefined manner.
• the shrink sleeve 36 is then also heated by means of a ring of hot air nozzles and the shrinkage process is thus initiated.
• the shrink tube 36 fits tightly against the collar 30 in the manner shown in FIG.
• the shrink sleeve 36 also engages in the recesses 22 and 24 and lies closely against the side surfaces 42 and 44 of the collar 30.
• the shrink tube 36 also adapts closely to the shape of the knurling 34.
• the material pulls out of the shrink fit 36 into the notches of the knurling 34.
• This anti-rotation device is form-fitting and not only friction-locking as in the known device with tensioning straps. The above parts are omitted.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Microelectronics & Electronic Packaging (AREA)
• General Engineering & Computer Science (AREA)
• Lining Or Joining Of Plastics Or The Like (AREA)
• Adjustable Resistors (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=6293324

Family Applications (1)

Country Status (4)

Families Citing this family (9)

Family Cites Families (14)

• 1986
  • 1986-01-31 DE DE19863603370 patent/DE3603370A1/de active Granted
• 1987
  • 1987-01-17 WO PCT/EP1987/000023 patent/WO1987004849A1/de not_active Application Discontinuation
  • 1987-01-17 EP EP87901041A patent/EP0256068A1/de not_active Withdrawn
  • 1987-01-17 US US07/116,076 patent/US4844647A/en not_active Expired - Fee Related

Non-Patent Citations (1)

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