May one insert the wick into the float, used in oil candles,
on Yom Tov?
involved is making a k’li – makeh b’patish.
One’s initial reaction is that it cannot be makeh
b’patish as one is merely inserting the wick into the
float. It is inserted without force or technical know-how,
so what could be the problem?
find that one may not insert feathers or down into a
pillowslip for the first time because one is making a
Even though it is quite simple to insert down into a slip
and this does not require force or craftsmanship, many
say that it is an issur d’oraisso (a biblical
So is it permitted or not?
previous shiur we learned that on Yom Tov it is permitted to
insert a thread into a needle,
even though one can argue that the two now become a k’li
and it should be ossur. The explanation is that the needle
is merely holding and pulling the thread does not make it a
complete k’li. So too we can say that the float holds
the wick and prevents it from sinking into the oil,
therefore it does not become a k’li.
To me it looks the perfect k’li,
why should it be permitted?
years we were accustomed to threading a wick through a
pipe-like holder on Yom Tov and it was
considered making a k’li. The holder holds the wick
in the center of the oil container and prevents it from
sinking. The floating wick is the same idea only more
sophisticated and its insertion is not ‘making a k’li’.
rabbonim are stringent and say that it does involve makeh
b’patish, and as usual one must ask one’s rav.
What's the issue with playing Lego
items to each other in a sturdy manner involves makeh
b’patish because a complete item is manufactured in the
process. Even if one did not complete the item on Shabbos,
the issur of making a k’li will still have
been violated because it is part of the process. For
example, assembling a baby’s crib on Shabbos with screws,
nuts and bolts is an issur d’oraisso of making
a k’li. It is likewise ossur to assemble half
the crib on Shabbos. Assembling Lego would appear to be the
Shlomo Zalman Auerbach says they are not the same.
Lego can be compared to a baby’s bottle which may be opened
and closed as needed.
What can be wrong with closing a
A baby’s bottle without the teat is useless and one may close
it on Shabbos because it is not a permanent closure. In
order to reuse it, it must be opened again. Lego pieces are
also assembled temporarily and in order to continue playing
one takes the pieces apart. So even though models and
designs are created by assembling pieces together, they are
never seen as a completed, finished product because the
intention is to take them apart for further use.
On the other hand, permanent Lego, such as pieces exhibited
in displays, would be ossur to assemble on Shabbos
because of their permanence.
May one remove clothes tags?
the issue is makeh b’patish, because one might view
the removal of clothes tags as finishing the product.
Shulchan Aruch writes
that one may not remove fringes
left over from the weaving process on account of makeh
b’patish- completing the garment.
difference is that the price tag is not affixed to the
garment as part of the manufacturing process; on the
contrary, it is added after the completion of the garment.
Another major difference is that the tailor or manufacturer
would not sell a garment with the fringes attached to the
garment, because it would be selling an unfinished product.
The price tag is affixed to a finished product and hence its
removal does not complete the product.
Zalman Auerbach explains that one need not be concerned with
tearing either because the tag was never intended to remain
attached to the garment.
May one straighten a bent fork?
often at a simcha that one happens to be landed with
a fork with crooked prongs. Straightening the prongs can
involve an issur of makeh b’patish because one
is completing – mending the product. The Magen Avraham
that one may not straighten a bent needle on Shabbos even
when it is only slightly bent. Accordingly one may not
straighten a bent knife or a spectacle frame handle because
it repairs the k’li.