=946. The common double-leaf hinge.=
=947. Rising hinge,= to cause the door to lift slightly as it opens, it
will then close of itself without a spring.
=948. Cup and ball hinge.=
[Illustration: 933.-948.]
=949 & 950. Pintle hinges.=
=951 & 952. Parchment or leather hinging= for wood movements.
=953. Dovetail joint,= used on iron bedsteads, &c.; the circular
dovetail is slightly tapered and fitted tight.
=954. Hinge for a door,= required to lay flat against the wall at either
side when open.
=955. Hinge pin= for rocking levers on a knife edge.
=956. Door spring hinge,= to return the door always to its central
position; the cams press against a roller attached to the springs.
=957. Another method,= with tension springs.
=958. Rocking bearing or knife edge,= used for weighing machines, &c.
=959. Knuckle joint,= halved together; the bolt secures the two parts
together.
=960. Door spring hinge= with open springs and toggle movement.
=961. Gate hinges,= with double pintle at bottom to cause the gate to
return to the central position without springs.
=962. Link hinge,= for a grid or trap door, to allow it to lie flat when
opened.
=963. Bayonet joint.= A common device.
=964. Double scarfed and joggled joint,= for pump, rods, &c., with
ferrules and keys to tighten up.
=965. Universal joint.= See Dr. Hooke’s Joint, Nos. 33 and 34.
=966. Knuckle jointed levers.=
[Illustration: 949.-966.]
=967. The common male and female or nipple and socket rod joint.=
=968. Multiple hinges,= with one centre bolt, for long or heavy doors.
=969. Scarfed rod or bar joint.=
=970. Another form of hinge,= to effect the same object as No. 954.
See also Swivel Joints, Nos. 893 and 894. Sections 49, 4, and 48.