BRAKING SHUTTLE BOX

• US 3,696,844 A
• Filed: 11/04/1969
• Issued: 10/10/1972
• Est. Priority Date: 11/05/1968
• Status: Expired due to Term

• Current Assignee: Adolf Oswald Bernatschek
• Original Assignee: Adolf Oswald Bernatschek
• Inventors: Bernatschek, Adolf Oswald
• Primary Examiner(s): Kee Chi, James
• Application Number:
  US04/873,995
• Time in Patent Office: 1,071 Days
• Field of Search: 139/185-187
• US Class Current: 139/186
• CPC Class Codes: D03D 49/52 Shuttle boxes change-boxes D03D43/00
• CPC Class Codes: H01H 63/20 using stepping magnet and ratchet

Abstract

A braking shuttle box has a fixed brake wall and a leaf spring opposite the brake wall forming with the same a brake channel for a shuttle. First energy absorbing means having high mass and inertia and second energy absorbing means having low mass and inertia are provided on the outer side of the leaf spring and urge the same toward and into the brake channel so that a shuttle entering the brake channel and engaging the leaf spring transfers energy to the mass of the first energy absorbing means while the leaf spring is biassed into sliding engagement with the shuttle by the second energy absorbing means so that the shuttle is braked in the brake channel.

Claims

1. Braking shuttle box comprising a supporting body including a brake wall;

leaf spring means located opposite said brake wall and forming with the same a brake channel having an inlet for a shuttle;

mounting means mounting the ends of said leaf spring means in said supporting body so that said leaf spring means is curved and convex toward said brake wall;

first and second energy absorbing means mounted in said supporting body on the side of said leaf spring means remote from said brake channel, said first energy absorbing means being closer to said inlet than said second energy absorbing means, said first energy absorbing means including first movable body means having greAt mass and inertia, and first spring means biasing said first movable body means into engagement with said leaf spring means for urging the same into said brake channel, and said second energy absorbing means including second movable body means having small mass and inertia, and second spring means mounted in said supporting body and biasing said second movable body means into engagement with said leaf spring means so that a shuttle entering said brake channel through said inlet transfers kinetic energy through said leaf spring means to said first movable body means so that the same is thrown away from said leaf spring means and compresses said first spring means which absorbs energy, whereupon kinetic energy remaining in said shuttle is transmitted through said leaf spring means and said second movable body means to said second spring means and absorbed by the same.

2. Braking shuttle box as claimed in claim 1 including means for fixedly securing one end of said leaf spring means to said supporting body, and adjusting means connected with the other end of said leaf spring means for adjusting the distance of the central part of said leaf spring means from said brake wall and thereby the width of said channel.

3. Braking shuttle box as claimed in claim 2 wherein said adjusting means include a loading spring engaging said other end of said leaf spring means and biasing said other end toward said one end so that said leaf spring means has a convex shape toward said brake channel, and manually operable means for adjusting the pressure of said loading spring supported on said supporting body and projecting outward from the same.

4. Braking shuttle box as claimed in claim 1 wherein said second energy absorbing means includes an adjusting member having a manually operable part projecting out of said supporting body and being adjustable for varying the resilient pressure exerted by said second spring means on said leaf spring means.

5. Braking shuttle box as claimed in claim 1 wherein said brake channel has said inlet for the shuttle at one end;

wherein one end of said leaf spring means is fixedly secured to said supporting body adjacent said inlet, and the other end of said leaf spring means is movably supported on said supporting body adjacent the other end of said brake channel.

6. Braking shuttle as claimed in claim 1 wherein said first movable body means include two movable bodies having great mass and inertia and being mounted on said supporting body for pivotal movement toward and away from said leaf spring means, and wherein said first spring means include two springs abutting said supporting body and said movable bodies for urging the latter against two portions of said leaf spring means spaced in the direction of said brake channel.

7. Braking shuttle box as claimed in claim 6, wherein said two movable bodies have thin end portions pivotally supported on said supporting body, and thick end portions located adjacent each other and abutting said portions of said leaf spring means, respectively;

and wherein said two springs abut said thick portions of said movable bodies, respectively.

8. Braking shuttle box as claimed in claim 6 wherein said supporting body has a guideway transverse to said leaf spring means;

wherein said second movable body means includes a light abutment member abutting said leaf spring means and guided in said guideway, and wherein said second spring means includes a coil spring located in said guideway and biasing said abutment member toward said leaf spring means; and

means for adjusting said coil spring.

9. Braking shuttle as claimed in claim 1 wherein mounting means include adjustable spring exerting variable longitudinal force on said leaf spring means.