Arukh HaShulchan, Orach Chaim 301:75-84

Sugya Map: The Status of Tashmishai (Accessories)

• Issue: Does an object used as an accessory to a melacha-related item (e.g., a case for glasses or a key ring) inherit the muktzeh status of its primary object?
• Nafka Mina: Carrying muktzeh items on Shabbat; the definition of keli she-melachto le-issur vs. muktzeh machmat gufo.
• Primary Sources: Shabbat 123a; Shulchan Aruch, OC 301; Arukh HaShulchan, OC 301:75–84.

Text Snapshot

"וכל מה שכתבנו... דהכל תלוי בחשיבות הכלי, דהיינו אם עיקרו לתשמיש של איסור או לתשמיש של היתר." (AHS 301:78)

• Leshon Nuance: The AHS shifts the focus from the object’s inherent nature to the subjective utility (chashivut) of the vessel in the user's daily life.

Readings

• Arukh HaShulchan (301:76): Argues that even if an object is technically melachto le-issur, if it lacks intrinsic value or is used interchangeably for heter, it loses its muktzeh rigidity.
• Magen Avraham (301:29): Maintains a stricter taxonomy; if the keli is designated for a primary melacha, the "accessory" remains bound by the status of the primary.

Friction

• Kushya: If the status follows the tashmish (usage), why is a pen (keli she-melachto le-issur) always muktzeh even if used for a mundane purpose?
• Terutz: The AHS (301:79) implies that kviut (fixed usage) governs. If the object is inherently a "tool," the potential for melacha overrides the occasional heter use.

Intertext

• SA, OC 301:2: The Mishnaic baseline for keli she-melachto le-issur.
• Responsa Igrot Moshe (OC 5:21): Extends the AHS logic to modern electronics—if the utility is heter (e.g., as a paperweight), the issur status is mitigated.

Psak/Practice

The AHS suggests a "functionalist" approach. For modern objects, if the primary kviut is heter, don't rush to stringency. However, if the item is definitively a keli for melacha, bittul (nullification) is required to use it for tzorech gufo or mekomo.

Takeaway

Functionality is not just an ontological state; it is a normative one. If the kviut of your tool is for heter, the muktzeh status is effectively nullified.