Reading device for dobby

A reading device for a dobby having a peg cylinder on which pegs for control of a pattern are carried, leading levers being rotatable between two alternative positions by the pegs, engaging hooks having hook levers rotated according to the rotation of the leading levers and a motion transmitting means including rocking hooks which are operable to engage the hook levers of the engaging hooks, said reading device comprising:

• a first bracket which is pivotally disposed on a first fixed shaft at one end thereof and which rotatably supports a shaft of the peg cylinder at the other end thereof, said first bracket having an engagement surface associated therewith,
• a second bracket which is secured on a second shaft at the central portion thereof, said second shaft being turnably supported on a frame,
• abutment means for permitting abutting engagement between said engagement surface associated with said first bracket and said second bracket, and
• turning means connected to the second shaft for turning the second bracket so that the peg cylinder is moved to any of a normal, reversed and leveling positions,
• wherein said turning means comprises:
• a pivotal lever secured to the second shaft,
• an eccentric cam connected with a driving source,
• contact members which are securely provided at both sides of the pivotal lever and which contact therebetween opposing sides of the eccentric cam,
• a disk which is integral with the eccentric cam and in which is formed a first recess for the normal position, a second recess for the reversed position and a third recess for the leveling position, and
• a microswitch having actuators for positioning the disk by entering a particular one of said recesses.

A reading device for a dobby having a peg cylinder rotatable about a first axis, said device comprising:

• a first engagement surface associated with the peg cylinder,
• transfer means for transferring rotational energy to the peg cylinder, the transfer means being rotatable about a second axis to any one of a first position for normal operation of the peg cylinder, a second position for reverse operation of the peg cylinder, and a third position for leveling operation of the peg cylinder,
• a second engagement surface associated with the transfer means,
• the first engagement surface and the second engagement surface being in abutting engagement,
• the first engagement surface and the second engagement surface being mutually configured so that the distance between the first axis and the second axis remains substantially constant as the transfer means is rotated from the first position to the second position,
• wherein the first engagement surface is a cam follower and the second engagement surface is a cam surface and wherein the cam surface further comprises:
• a first cam surface portion having an arc of a first radius,
• a second cam surface portion having an arc of a second radius,
• the first cam surface portion abutting the cam follower during rotation of the transfer means between the first position and the second position, and
• the second cam surface portion abutting the cam follower during rotation of the transfer means between the first position and the third position.