Drive mechanism for a sub-mechanism of a weaving machine
AssigneeSulzer Brothers Limited
InventorErwin Pfarrwaller
Life of this patent
Estimating the term…
Abstract
The drive mechanism for a reciprocating sub-mechanism on a weaving machine, e.g. for a cam for raising a projectile into the picking line, comprises a dead-center type crank drive. The drive is pivoted to and fro continually through 180.degree.. The connecting rod, which drives the projectile raise cam, is kept practically completely in the standstill position in the two crank standstill positions. This rod is mounted on an eccentric section of the crank pin so that small reciprocating movements of the crank in the dead-center positions due to play in the parts driving them cannot be transmitted to the connecting rod and projectile raise cam. The eccentric section of the crank pin can also be adjusted.
Claims17
In combination,
- a reciprocable sub-mechanism for movement between a pair of end positions;
- a main drive;
- and
- a transmission connected between said main drive and said sub-mechanism for driving of said sub-mechanism from said main drive;
- said transmission including a crank drive having a crank shaft drivingly connected to said main drive for oscillation thereby with at least one reversal point of the oscillation movement of said crank shaft in the region of a dead-center position of said crank drive.
A drive mechanism comprising
- a crank shaft having an axis located in a given base plane and being oscillable between two reversal points;
- a pair of crank webs mounted on said crank shaft, each said web having a bore therein on an axis spaced perpendicularly from said base plane with said crank shaft at either of said reversal points;
- a crank pin mounted in said webs in each respective bore thereof, said pin having an eccentric section with an axis disposed substantially in said base plane with said crank at one of said reversal points;
- and
- a connecting rod articulated on said crank pin between said webs.
Dependencies are inferred from the claim text.