Jewelry concepts and technology, Oppy Untracht

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EWELRY CONCEPTS AND TECHNOLOGY

OPPI UNTRAJCHT

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~ HIN GE TYPE S

. . _ flop s 19 10 A lypical hinge wh,ch con s1s h o f r 1. {I ves or b ear ers); cheni ers o 0

k~uck les; and o pin . This is a thre e-k nuckle hing e , lhe top ond t bottom knucld es ottach ed to th e lef i flop , ond the cen ter on e to th e righ hown s flop . The pin heod hos b een lo roised ob ove th e top knuckl e on ly top illus trate its po si tion . In foct, bolh ond bottom heod s would be formed lik e rivet heods , do se upon the knuck les, b ui with just enough space so os noi to freeze th e hinge oction . lf this occurs, inject some tr ipoli o nd work the flop bock and forth slowly till il moves freely . ed 2. A permon ent pin hinge with flotten

heods. 3. A remova ble p in hinge, which ollows diseng ogem en t of the lug s. 4. Remo voble pin wi th soldere d -on ring eye and atfo ched gucrd ch c in to , preven t loss; e pin with o forged eye one piece. 5. A remova ble split p in hinge . 6. A perman ent splil pin hing e wi th soldere d.i n retoin ing crossba r. 7. Remov able screw pin in inlerno lly thread ed knuckl es. 8. So lt materi ai hinge wilh U.flaps having holes to allow fo r riv e ts or screws. 9. Hook ond eye hinge with topere d in pins to allow them to be cemen te d piace in soft materio ls. or lO. Wire ring hinge, eoch unii riveted screwe d in piace. e bl si invi l, interna 11. Doveta il hinge with riveted p in.

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