Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
178 words
A loom dobby, for use in a loom having heald shafts, comprising, in combination, plural planetary gearings; a planet carrier; means mounting said planet carrier for oscillatory motion; means connected to said planet carrier and operable to impart oscillatory motion thereto; at least one planet gear shaft secured on said planet carrier; each planetary gearing including a respective planet gear mounted for free rotation on said planet gear shaft, a respective sun gear meshing with the associated planet gear, and a respective ring gear meshing with the associated planet gear; means mounting each sun gear and ring gear for free rotation; respective holding means operatively associated with each sun gear and its associated ring gear and selectively operable to hold one of the associated sun gear and ring gear stationary at least substantially at the same time as the direction of motion of said planet carrier is reversed; and means operatively engaged with each ring gear and operable, responsive to oscillatory motion of the associated ring gear, to impart a substantially reciprocatory motion to a respective heald shaft.
Claim 2
Dependent Claim
178 words
A loom dobby, for use in a loom having heald shafts, comprising, in combination, plural planetary gearings; a planet carrier; means mounting said planet carrier for oscillatory motion; means connected to said planet carrier and operable to impart oscillatory motion thereto; at least one planet gear shaft secured on said planet carrier; each planetary gearing including a respective planet gear mounted for free rotation on said planet gear shaft, a respective sun gear meshing with the associated planet gear, and a respective ring gear meshing with the associated planet gear; means mounting each sun gear and ring gear for free rotation; respective holding means operatively associated with each sun gear and its associated ring gear and selectively operable to hold one of the associated sun gear and ring gear stationary at least substantially at the same time as the direction of motion of said planet carrier is reversed; and means operatively engaged with each ring gear and operable, responsive to oscillatory motion of the associated ring gear, to impart a substantially reciprocatory motion to a respective heald shaft.
Claim 3
Dependent Claim
89 words
A loom dobby, as claimed in claim 1, in which the means for imparting an oscillatory motion to said planet carrier comprises a lever connected to said planet carrier; means operable to drive said lever with an oscillatory motion; each ring gear being formed as a cam disc; said means operable to impart a substantially reciprocatory motion to a respective heald shaft comprising a respective cam follower engaged with each cam disc and operable to impart the substantially oscillatory motion of the cam disc to the respective heald shaft.
Claim 4
Dependent Claim
49 words
A loom dobby, as claimed in claim 1, including a stationary member provided between each sun gear and the associated ring gear; said holding means comprising a locking device mounted in said stationary member and operable to hold either the associated ring gear or the associated sun gear stationary.
Claim 5
Dependent Claim
52 words
A loom dobby, as claimed in claim 3, in which said locking device is a bolt radially slidable in said stationary member and having one end arranged to engage between adjacent teeth of the associated ring gear and the other end arranged to engage between adjacent teeth of the associated sun gear.
Claim 6
Dependent Claim
24 words
A loom dobby, as claimed in claim 4, including fluid pressure means operable to reciprocate each radially slidable bolt between its two locking positions.
Claim 7
Dependent Claim
43 words
A loom dobby, as claimed in claim 2, in which the periphery of each cam disc is formed with a cam track; said cam follower comprising a rocking lever having roller means engaged with said cam track and arranged to rock said lever.