Kipp's apparatus vs apparatus

Kipp's apparatus and apparatus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Kipp's apparatus	Yes	No	No	No
apparatus	Yes	No	No	No

As nouns, apparatus is a hypernym of Kipp's apparatus; that is, apparatus is a word with a broader meaning than Kipp's apparatus:

Kipp's apparatus: a laboratory apparatus for producing a gas (usually hydrogen sulfide) by the action of a liquid on a solid without heating
apparatus: equipment designed to serve a specific function

Other hypernyms of Kipp's apparatus include setup.

Kipp's apparatus (noun)	apparatus (noun)
a laboratory apparatus for producing a gas (usually hydrogen sulfide) by the action of a liquid on a solid without heating	equipment designed to serve a specific function
	(anatomy) a group of body parts that work together to perform a given function