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US 4,302,078 AGranted
Photographic filter holder with threaded adapter
AssigneeAmbico Inc.
InventorDavid M. Stravitz
Life of this patent
Estimating the term…
Abstract
A filter holder having a plurality of slots therein for receiving filters, photographic effect sheets, or the like, and an adapter which is removably retained in one of said slots for threadably engaging a threaded front portion of a photographic lens. A lens cover element is provided which snapingly engages in the filter holder, and a rotatable filter is engaged in the filter holder and retained by the adapter, the filter being rotatable even in its engaged condition. A lens shade is provided which snapingly and removably engages the filter holder.
Claims9
A filter holder for photographic applications comprising:
- a main plate-like body portion (1) having an opening (2) therein;
- means (3,4) coupled to said body portion (1) and defining at least one channel (5-8) on one side of said body portion (1) and at least one channel (12,13) on the opposite side of said body portion (1);
- a threaded adapter (14) having a flange (15) for being removably received in said at least one channel on said opposite side of said body portion (1);
- said body portion (1) comprising means (17,18) for retaining said adapter in said at least one slot into which it is inserted, said adapter being rotatable within said slot when retained therein;
- a filter means (21) having a flange (23) and being shaped so as to conform to the shape of said opening (2) in said body portion (1);
- said body portion (1) having a recess (19) coextensive with and adjacent said opening (2) for receiving said flange (23) of said filter means when inserted therein, said adapter (14) having surface means overlying said recess (19) for retaining said filter means in said recess (19);
- resilient retaining means (9,10) coupled with said at least one channel (5-8) on said one side of said body portion (1) for retaining a filter or photographic effect sheet or plate inserted into said at least one channel (5-8).
4 more elements
Dependencies are inferred from the claim text.