| 摘要 |
1,017,383. Cycle frames; collapsible cycles. MOULTON CONSULTANTS Ltd. Nov. 21, 1962 [Dec. 1, 1961], No. 43068/61. Heading B7E. A bicycle frame comprises a longitudinal backbone member 1, a tapered front tube 2 for mounting a steering column 8, a tapered seat tube 3, a crank axle housing 20, and a bracing member 30 extending rearwardly from a point on the upper side of the backbone 1 to join the seat tube 3 below its midpoint. The backbone 1 is formed by a single flat-sided oval or elliptical tube, or by two or more tubes clustered together or arranged one above another. The bracing member 30 may comprise twin tubes arranged side by side on a single tube which passes through the seat tube 3 and extends rearwardly as shown to support a luggage platform or for mounting a tyre pump, a prop stand, or a rear light on its rearmost extremity. The rearwardly extending portion of the bracing member 30 may be supported by a stay depending from the upper end of the seat tube 3 or rising from the rear end of the backbone 1. The crank axle housing 20 is secured by brazing or by adhesive cement within a concave depression formed in the underside of the backbone 1 immediately below the seat tube 3 and is additionally supported by a bracket brazed to the housing and to the backbone 1. The frame tubes are connected together by means of ears 17, 31 which are positioned by spot welds or pop rivets and secured by brazing or adhesive cement. In order that the bicycle may be collapsible or able to be hinged for storage or tranportation the backbone 1 may be in two parts connected by sleeve means (Fig. 4, not shown) comprising members 41, 42 secured within one part 1b and which are inserted into the other part la and expanded by means of a screw 45. The frame is mounted upon a front wheel 11 by means of a telescopic rubber spring, and upon a rear wheel 13 by means of a pivoted arm 12 and a rubber spring. |
