US3565219A - Flexible mount for a loom letoff brake - Google Patents

Flexible mount for a loom letoff brake Download PDF

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Publication number
US3565219A
US3565219A US789109A US3565219DA US3565219A US 3565219 A US3565219 A US 3565219A US 789109 A US789109 A US 789109A US 3565219D A US3565219D A US 3565219DA US 3565219 A US3565219 A US 3565219A
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US
United States
Prior art keywords
disc
bracket
fastened
caliper
connecting member
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
US789109A
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English (en)
Inventor
John H Nydam
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.)
Draper Corp
Boeing North American Inc
Original Assignee
North American Rockwell Corp
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 North American Rockwell Corp filed Critical North American Rockwell Corp
Application granted granted Critical
Publication of US3565219A publication Critical patent/US3565219A/en
Assigned to DRAPER CORPORATION, reassignment DRAPER CORPORATION, CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE APRIL 1,1982 Assignors: DELTA ACQUISITION CORPORATION,
Assigned to DELTA ACQUISTION CORPORATION reassignment DELTA ACQUISTION CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ROCKWELL INTERNATIONAL CORPORATION
Assigned to CITICORP INDUSTRIAL CREDIT INC. reassignment CITICORP INDUSTRIAL CREDIT INC. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DRAPER CORPORATION F/K/A DELTA ACQUISITION CORPORATION
Assigned to STANCHART BUSINESS CREDIT, A CORP. OF CA. reassignment STANCHART BUSINESS CREDIT, A CORP. OF CA. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DRAPER CORPORATION
Assigned to DRAPER CORPORATION, A CORP. OF GEORGIA reassignment DRAPER CORPORATION, A CORP. OF GEORGIA RELEASED BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: CITICORP INDUSTRIAL CREDIT, INC.
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/04—Control of the tension in warp or cloth
    • D03D49/06—Warp let-off mechanisms
    • D03D49/08—Warp beam brakes

Definitions

  • This invention pertains to the braking mechanism for the let-off of a loom whereby frictional restraint is provided to a yarn beam for maintaining tension on the yarn being unwound. More particularly the invention pertains to a movable support for a caliper-type brake mechanism which shall follow the normal and expected deviations of a rotating disc.
  • a brake found to be highly suitable for this purpose is the caliper type where a disc, mechanically connected with the yarn beam, is frictionally restrained by opposing brake pucks.
  • the housings which contain the brake pucks have been supported by brackets secured to the framework of the loom. There has been no allowance for movement of the housings so that any variations in the plane of rotation which the disc might take have resulted in excess friction or binding between the parts and fluctuations in the yarn tension.
  • the variations between the rotating disc and the fixed brackets are relatively minor, yet the fluctuation in tension readings may be significant and will appear adversely in the woven material.
  • This invention provides a mounting bracket for the brake of a friction let-off which, by means of a flexible member permits the brake pucks or shoes to stay parallel with the rotating control disc at all times.
  • the tension readings on the yarn will remain more nearly constant due to the lack of outside or undesirable friction caused by deviations in the rotating disc.
  • FIG. 1 is an elevation as applied to the side of a loom
  • FIG. 2 is a plan view of that shown in FIG. 1;
  • FIG. 3 is a section taken on line 3-3 in FIG. 1.
  • FIG. 1 a portion of a loomside is shown to orient the invention in relation to any common weaving loom.
  • a friction let-off designated generally as 21, is shown in this disclosure as a caliper-type brake, a known means for letting-off warp yarns under tension.
  • a rotatable disc 22 is secured for rotation with a shaft 23 which may be positively driven in any convenient manner such as gearing (not shown) in mesh with the yarn beam gear (also not shown). Friction let-offs of various types, being well known in the art, will not require illustration here for complete understanding of their function. It is sufficient to say that the disc 22 is in direct con- 'nection with a yarn beam and any frictional restraint or release applied to the disc will similarly affect the beam.
  • Caliper-type disc brakes are commercially available for use in installations of this kind.
  • the one shown in the drawing may be obtained from H-H Products Company Inc. of Milwaukee,
  • Wisconsin It includes opposingly disposed interconnected housings 24 and 25 each containing a brake puck 26 and 27 with at least one puck being movable toward the other and an.
  • Controlled hydraulic or pneumatic pressure is applied to the housing 24, as shown in FIG. 1, by a hose 28.
  • the puck 27 is stationary while the puck 26 is movable toward and away from the disc 22. The whole combination is permitted slight movement along a bolt 29 to compensate for gradual wear upon the brake pucks.
  • the brake 21 is secured by screws 30 and 31 to the upper surface of a bracket 32'which will support the brake 21 in position to act upon the disc 22.
  • the bracket 32 has an upwardly angled finger :33 which is directed toward, but separated from, a rigid arm 34 (FIG. 2).
  • the arm 34 is pivotally supported by a-ball joint end 35 fastened to a lug 36 which is held by screws 37 and'38 into the loomside 20.
  • the finger 33 and arm 34 are maintained in spaced separation by a flexible flat spring 39 which is fastened'to each by pairs of screws 40 and 41 (FIG. 2).
  • an adjusting screw 47 threaded through an angular bracket 48 held by screws 49 .upon theloomside 20.
  • the bracket 32 will be held on the point of the screw 47 and may be raised or lowered to be properly positioned in relation to the disc 22.
  • the bracket 32 may pivot or move laterally upon the screw 47 as it rests loosely thereon.
  • the bracket 22 which supports the brake 21 is flexible and movement may be effected relative to the supported rigid arm 34. Whenever angular pressure is exerted against the brake 21, the spring 39, through a flexing motion, will maintain a continual parallel relationship between the brake 21 and the disc 22.
  • a disc brake assembly comprising a rotatable disc, a caliper embracing a peripheral portion of said disc and selectively operable to clamp said disc to restrain rotation thereof, the improvement comprising:
  • b. means to establish the pivotal position of the caliper relative to the periphery of the disc without restraining the limited lateral movement of the caliper relative to the disc.
  • a caliper-type brake assembly disposed for applying frictional restraining forces upon opposite sides of said disc which includes:
  • a mounting device for supporting said brake assembly in an operative relationship with said rotating disc including a flexible connecting member fastened intermediate the ends of said mounting device;
  • said mounting device further including a supported end and a supportingend and said connecting member permitting relative movement between the supporting and supported ends;
  • the supported end including a rigid arm pivotably secured to the loom and removably fastened to said connecting member;
  • said supporting end including a bracket removably fastened to said connecting member and having said brake assembly fastened upon the upper surface thereof wherein said bracket and said arm are maintained in spaced separation by said connecting member;
  • said connecting member defining a flat spring adapted to be fastened securely to both said bracket and said arm.
  • said mounting device further includes at least two spaced apart reinforcing plates partially overlying and fastened to said

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Braking Arrangements (AREA)
US789109A 1969-01-02 1969-01-02 Flexible mount for a loom letoff brake Expired - Lifetime US3565219A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US78910969A 1969-01-02 1969-01-02

Publications (1)

Publication Number Publication Date
US3565219A true US3565219A (en) 1971-02-23

Family

ID=25146618

Family Applications (1)

Application Number Title Priority Date Filing Date
US789109A Expired - Lifetime US3565219A (en) 1969-01-02 1969-01-02 Flexible mount for a loom letoff brake

Country Status (7)

Country Link
US (1) US3565219A (enrdf_load_stackoverflow)
BE (1) BE743965A (enrdf_load_stackoverflow)
BR (1) BR6915677D0 (enrdf_load_stackoverflow)
CH (1) CH507396A (enrdf_load_stackoverflow)
DE (1) DE1963642A1 (enrdf_load_stackoverflow)
FR (1) FR2027632A1 (enrdf_load_stackoverflow)
GB (1) GB1230337A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4406444A (en) * 1981-06-19 1983-09-27 General Signal Corporation Brake hanger for railway brakes
EP0147880A3 (en) * 1983-12-21 1985-08-07 Sab Nife Ab A block brake actuator for a rail vehicle
US20110108380A1 (en) * 2008-04-18 2011-05-12 Allan Martin James Disc brake colliper support

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108754795A (zh) * 2018-09-12 2018-11-06 太平洋纺织机械（常熟）有限公司 剑杆织机用的纬纱剪刀装置

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3299991A (en) * 1963-10-08 1967-01-24 Renault Disc brakes

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3299991A (en) * 1963-10-08 1967-01-24 Renault Disc brakes

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4406444A (en) * 1981-06-19 1983-09-27 General Signal Corporation Brake hanger for railway brakes
EP0147880A3 (en) * 1983-12-21 1985-08-07 Sab Nife Ab A block brake actuator for a rail vehicle
US20110108380A1 (en) * 2008-04-18 2011-05-12 Allan Martin James Disc brake colliper support

Also Published As

Publication number Publication date
CH507396A (de) 1971-05-15
BR6915677D0 (pt) 1973-01-18
DE1963642A1 (de) 1970-07-23
GB1230337A (enrdf_load_stackoverflow) 1971-04-28
FR2027632A1 (enrdf_load_stackoverflow) 1970-10-02
BE743965A (enrdf_load_stackoverflow) 1970-05-28

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Legal Events

Date Code Title Description
AS Assignment

Owner name: DELTA ACQUISTION CORPORATION; HORNADAY RD., GREENS

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ROCKWELL INTERNATIONAL CORPORATION;REEL/FRAME:004113/0020

Effective date: 19820321

Owner name: DRAPER CORPORATION,

Free format text: CHANGE OF NAME;ASSIGNOR:DELTA ACQUISITION CORPORATION,;REEL/FRAME:004097/0735

Effective date: 19820920

AS Assignment

Owner name: CITICORP INDUSTRIAL CREDIT INC., A CORP. OF DE

Free format text: SECURITY INTEREST;ASSIGNOR:DRAPER CORPORATION A CORP. OF GA F/K/A DELTA ACQUISITION CORPORATION;REEL/FRAME:004070/0533

Effective date: 19821021

AS Assignment

Owner name: STANCHART BUSINESS CREDIT, 200 GALLERIA PARKWAY, N

Free format text: SECURITY INTEREST;ASSIGNOR:DRAPER CORPORATION;REEL/FRAME:004539/0198

Effective date: 19860328

AS Assignment

Owner name: DRAPER CORPORATION, GREENSBORO, NORTH CAROLINA A C

Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:CITICORP INDUSTRIAL CREDIT, INC.;REEL/FRAME:004664/0583

Effective date: 19860331