| 摘要 |
431,102. Adjustable chairs. GIBB, G., Carey, Texas, U.S.A. Sept. 14, 1934, No. 26441. [Class 52 (ii)] An adjustable chair comprises a leg structure, an integral seat 2 and back 3, means adapted to be operated to adjust the back and seat to various angular positions, and locking means, independently operated, to retain the seat and back in adjusted position. The seat and back are secured to brackets fixed to a shaft 8 which is supported in bearings fixed to the leg structure ; the shaft 8 is rotated by means of bevel gears from a shaft 10 which is rotated by means of a hand wheel 13. The locking means comprises a collar 16 slidably secured to the shaft 10 and carrying a pin which engages in holes in a fixed plate 14. The collar 16 is normally pressed towards the plate 14 by a spring, but is retracted for adjustment by a yoke 18 secured to a rod 19 operated by a finger-piece 191. A brace 20 comprising a U-shaped rod is mounted in bearings on the back, and may be let down to assist in supporting the chair when the back is in the reclining position.
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