Device for centering of optic lenses in a mechanical mounting, i

Details Device for centering of optic lenses in a mechanical mounting, i Device for centering of optic lenses in a mechanical mounting, i

1988-12-23

1990-08-28

Terrell, William

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51162, 51217T, 51217L, 82147, 82151, 82170, 384 1, 384118, B24B 504, B24B 914, B23B 1902, B23B 2304

Patent

active

049514210

ABSTRACT:
To center optic lenses in a mechanical mounting, in particular during edge cutting and bevelling, the invention includes a device with a housing (10), in which a motor drive (M, R) acts through a torque part (50), drive shafts (14, 14') and drive elements (16, 16') onto aligned centering spindles (18, 18'). These are arranged in guide bearings (22, 22') on projecting parts of the C-shaped housing (10) and are constructed as air bearings. In this manner, it is possible to hold the clamping angle (.alpha.) on the lens (L) in the range below 2.times.8.degree., preferably below 2.times.6.degree.. In particular the lower centering spindle (18) is smoothly axially adjustable in the air bearing (22), for which purpose axially parallel and/or partial-ring-shaped grooves (90) are provided at the ends of a thin-wall guide sleeve (76), between which ends peripheral air-cushion fields build up when pressurized air is being supplied. The axial closing of the clamping spindle (18) is done by a clamping device (24) having a crossbar plate (26) and a membrane piston (32).

REFERENCES:
patent: 2508009 (1950-05-01), Bonin
patent: 2660484 (1953-11-01), Gerard et al.
patent: 2663977 (1953-12-01), Gerard et al.
patent: 3143382 (1964-08-01), Ertaud et al.
patent: 3599377 (1971-08-01), Dartnell
patent: 3732757 (1973-05-01), Cottin
patent: 3750344 (1973-08-01), Raphael
patent: 4434581 (1984-03-01), Spriggs
patent: 4612736 (1986-09-01), Massard et al.
patent: 4809466 (1989-03-01), Junker

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