DOI Seite / Zitierlink:
https://doi.org/10.11588/diglit.62828#0583
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clotted line at q, it follows that the upright cog wheel N
muft be turned to the right-hand ; and if this be turned
to the right-hand, then muft alfo the quadrant cog-wheel
Q on the left turn to the right with it : and, becaufe the
axis A is fixed fail: in the wheel Q, and the crooked levers e e
into A, confequently the rollers L L, fixed by the rod o to thefe
levers, will defcribe a quadrant of a circle, as denoted by the
dotted line and the roller 9; becaufe the connecting cog-rod 5
makes Q move in the fame curve as N does. Again, if N, the
upper part of the upright cog-wheel, move to the right, then
muft M, the lower part of it, move to the left; and, being con-
nected with the cog-rod 6, and it again to the right-hand qua-
drant cog-wheel Q, it follows, as before, that the levers f /, and
the roller L, will defcribe a quadrant of a circle to the left-hand,
as at 8. The reader muft eafily fee now, that when the winch c
is turned by the fly-bracket, that every part of the machinery
will be put in motion, and that the levers and rollers, in ap-
proaching gradually to 8 and 9, muft neceflarily raife up the
till. But it muft alfo be obferved, that the motion of the levers
ff and ee is greatly promoted by the power of the common
fteel-fprings S S; for, when the till is down, thefe are always
charged; that is, the tides of the fprings are nearly clofe to each
other, and thefe being connected with what may be termed the
auxiliary, or afliftant cog-rods, 4 and 7, and confequently preff-
ing againft their ends, the quadrant cog-wheels Q Q are there-
by made to revolve, and the levers and rollers are raifed almoft
as
clotted line at q, it follows that the upright cog wheel N
muft be turned to the right-hand ; and if this be turned
to the right-hand, then muft alfo the quadrant cog-wheel
Q on the left turn to the right with it : and, becaufe the
axis A is fixed fail: in the wheel Q, and the crooked levers e e
into A, confequently the rollers L L, fixed by the rod o to thefe
levers, will defcribe a quadrant of a circle, as denoted by the
dotted line and the roller 9; becaufe the connecting cog-rod 5
makes Q move in the fame curve as N does. Again, if N, the
upper part of the upright cog-wheel, move to the right, then
muft M, the lower part of it, move to the left; and, being con-
nected with the cog-rod 6, and it again to the right-hand qua-
drant cog-wheel Q, it follows, as before, that the levers f /, and
the roller L, will defcribe a quadrant of a circle to the left-hand,
as at 8. The reader muft eafily fee now, that when the winch c
is turned by the fly-bracket, that every part of the machinery
will be put in motion, and that the levers and rollers, in ap-
proaching gradually to 8 and 9, muft neceflarily raife up the
till. But it muft alfo be obferved, that the motion of the levers
ff and ee is greatly promoted by the power of the common
fteel-fprings S S; for, when the till is down, thefe are always
charged; that is, the tides of the fprings are nearly clofe to each
other, and thefe being connected with what may be termed the
auxiliary, or afliftant cog-rods, 4 and 7, and confequently preff-
ing againft their ends, the quadrant cog-wheels Q Q are there-
by made to revolve, and the levers and rollers are raifed almoft
as