Patent GB-1316487-A (GB)
Title: Umbrellas
IPC: A45B19/06
Filed: 1970-05-13
Abstract: 1316487 Self-opening umbrellas IDEAL K K 13 May 1970 [14 May 1969 (2)] 23292/70 Heading A4P General construction, Fig.1. An umbrella comprises a main shaft having a plurality of ribs pivoted to its top end and a handle 5 at its lower end, said main shaft comprising telescopic inner and outer members, 4 and 1 respectively and a compression spring 6 urging them apart, a first slider 16 having the inner ends of a plurality of struts 17 pivoted to it and a second slider 21 below said first slider, a compression spring 26 urging said sliders apart, respective auxiliary struts 20 pivoted at their ends to said second slider 21 and to said struts 17, said ribs each comprising an inner main rib 12 and an outer rib 15 retractable into said main rib 12, the outer ends of said struts 17 being pivoted to said outer rib members, a locking means to retain the umbrella in a collapsed condition with said shaft tubular members telescoped one within the other and said outer rib members 15 retracted, such that the release of said locking means extends the shaft members and rib members to open the umbrella. Shaft Locking members in the form of beads (9), Fig. 5 (not shown), supported on a U-shaped leafspring internally disposed of the member 4, pass through holes (10) in the shaft member 1 to lock said shaft members in the extended configuration. A similar hole (11) is provided spaced above and in vertical alignment with one of said holes (10) to lock the shaft in a slightly shortened configuration for facilitating the gathering and the placing of the rib tips in the open top 5a of the handle. The spring 6 is internally disposed of the shaft member 1 and has its lower end contacting the top face of a plug (4a) which closes the top end of the shaft member 4, and its upper end abuts the lower face of the crown 2. Telescoping of the shaft without relative rotation of the shaft members is facilitated by an internal longitudinal ridge (8), Fig.6 (not shown), on the member 1 and an external groove 7 on the member 4. Sliders The sliders 16 and 21 are urged apart by the spring 26 which effects self-opening of the umbrella, the spring entering a hollow cylindrical portion 23 of the second slider 21. The strength of the spring 26 is less than that of the spring 6 in order that extending of the shaft may be effected before the opening of the umbrella. A tubular member 18 having a flange 18a is provided internally of the slider 16 and extends upwardly therefrom, the upper end of the member 18 abutting the lower face of the crown 2 when the umbrella is fully opened, effecting a limit on the upward movement of said slider 16. Openings 25 and 25a are provided in the cylindrical portion 24 of the second slider 21 for engagement with said locking means. Handle and Locking Means. The locking means comprises a resilient latch 27 having a projection 27a which engages the opening 25 when the umbrella is folded, and is provided with a button 28 for releasing said latch projection to open the umbrella. In the folded configuration the tips of the ribs are engaged within the open top 5a of the handle 5. Gits. Each git 13 is slidable along a U-section main rib 12 and draws with it the outer rib member 15 which is pivoted to it at its inner end. A stop ring 14 is provided on the main rib 12 to limit the travel of the git 13. Each strut 17 is pivotally connected to a git 13.