3610584 is referenced by 10 patents and cites 3 patents.

A lowering device mechanism adapted to be utilized for movement of a structure, such as a luminaire or light-carrying apparatus, from a supported position to an accessible position, the mechanism having novel structural features permitting the simplified and efficient lowering or raising of the apparatus, for servicing, repairing, or replacing elements of the apparatus as necessary.

Title
Lowering device mechanism
Application Number
04/798,247
Publication Number
3610584
Application Date
January 21, 1969
Publication Date
October 5, 1971
Inventor
Pfaff Jr Henry C
Assignee
Pfaff and Kendall
IPC
B66d 01/48
B66D 03/18
B66D 03/00
F21V 21/38
F21V 21/36
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