Rif Shabbat 30a

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30a

{Shabbat 65b continues}
on their garments.

MISHNA:
A WOMAN MAY WEIGHT [HER CLOAK] WITH A STONE, NUT, OR COIN, PROVIDING THAT SHE DOES NOT ATTACH THE WEIGHT IN THE FIRST PLACE ON THE SABBATH.

Gemara:
But you say in the first clause, that she may weight it {implying even lechatchila}.
Abaye said: The second clause refers to a coin. {which may not be handled on Shabbat}

That is to say, regarding only the coin, one may not weight it in the first place on Shabbat, but a stone and a nut, she may weight it even in the first place.

Abaye asked: May a woman evade [the Sabbath prohibition] by weighting [her cloak] with a nut in order to carry it out to her infant child on the Sabbath?
And it emerges with a teku {the question is unresolved}, and we have established that any teku which is Biblical we rule stringently, and Rabbinic we rule leniently.

MISHNA:
A STUMP-LEGGED PERSON MAY GO FORTH WITH HIS WOODEN STUMP: THIS IS R. MEIR'S VIEW;

{Shabbat 66a}
WHILE R. JOSE FORBIDS IT.
AND IF IT HAS A RECEPTACLE FOR PADS {upon which the stump rests}, IT IS UNCLEAN {=susceptible to ritual impurity}.
HIS SUPPORTS ARE UNCLEAN THROUGH MIDRAS, AND ONE MAY GO OUT THEREWITH ON THE SABBATH, AND ENTER THE TEMPLE COURT WHILST WEARING THEM.
HIS STOOL AND SUPPORTS ARE UNCLEAN AS MIDRAS, AND ONE MAY NOT GO OUT WITH THEM ON THE SABBATH, AND ONE MAY NOT ENTER THE TEMPLE COURT WITH THEM.
AN ARTIFICIAL ARM [LUKITMIN] IS CLEAN, BUT ONE MAY NOT GO OUT THEREWITH ON THE SABBATH.

Gemara:
"A STUMP-LEGGED PERSON MAY GO FORTH WITH HIS WOODEN STUMP":
And the halacha is like Rabbi Yossi.

{Shabbat 66b}
What is lukitmin? {translated by Soncino as an artificial arm}
Rabbi Abahu said: A pulley for loads. {So Jastrow. Rashi: a wooden donkey's head worn by mummers}
Rafram {our gemara: Rava} bar Papa said: Stilts.
Rabba bar Rav Huna cited Ulla {in our gemara, just Rabba bar Rav Huna}: