L. TECHNOLOGY. 425 



L. TECHNOLOGY. 



IMPROVED LOOM. 



According to the Scientific Review, a new invention and 

 improvement in looms, recently patented by Messrs. Young 

 & Thomason, of Radcliffe, is more particularly applicable to 

 the apparatus of those looms in which the pattern to be woven 

 is formed through the medium of the jacquard apparatus, or 

 through that of endless tappets previously arranged upon a 

 barrel or chain, or other equivalent, the disposition of the 

 cards of the jacquard apparatus, or other previously arranged 

 pattern tappet, being designed to act upon and place in posi- 

 tion pendulum hooks, each of which is suspended from a ver- 

 tical bar connecting the top and bottom jacks, giving motion 

 to the healds ; each hook having an independent action, and 

 being actuated so as to rise and fall through the medium of 

 rising and falling knives, one being placed behind and the 

 other in front of the suspended pendulum hooks, the up and 

 down motions of which, and also the motion transmitted to the 

 upper levers for closing the jacks, being obtained by means 

 of a grooved coin, receiving a second motion from the crank 

 shaft. The hooks, when in their nominal position, and not 

 acted upon by the pattern-cards or tappets, are forced out- 

 ward by springs into a position directly over the rising knife 

 actuating the jacks giving motion to the bottom shed; but, 

 previously to the using of this knife, the traversing pattern- 

 cards or tappets have been brought into position, and forced, 

 according to the shed required, such of the suspended pendu- 

 lum hooks out from their nominal position into a position 

 that will admit of their beins: taken or carried down bv the 

 descending knife on the opposite side. The upward and 

 downward motion of the two knives at this time acts upon 

 their respective hooks, and gives, through the medium of the 

 jacks, the necessary rise and fall to the healds for shedding, 

 according to the pattern under manufacture, simultaneously 

 with which the pattern-cards or tappets effect their change 

 for the next shed, the suspended hooks being again brought 

 into their nominal position, and the shed closed by means of 



