US66632A - Improvement in umbrellas - Google Patents

Description

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TO ALL PERSONSITO WHOM THESE PRESENTS SHALL COME:

' Be it-known that I, HORACE T. ROBBINS, of Boston, in the county of Suffolk, and State of Massachusetts, have invented a new and useful Improvement in Umbrella-Frames;'and I do hereby declare that the same is fully described in the following specification and accompanying drawings, letters, figures, and references thereof'. Of the said drawings-1 y 4 Figure 1 represents a side view of, an umbrella-frame having my improvement applied to-it.

-Figure 2 is an inside view of the same, with thehandle cut off on the line A B'.

Y Similar letters refer to like parts in the different drawing-s. C is the handle; D, the ribs; E, the rib jointplate; F, the stretchers; G, thestretcher joint-slide. l

The nature of my inventionV consists in constructing umbrella-frames in such a manner` as to give them suflcient strength to withstand. the pressureof the wind either from the outside or inside. Many times, when an umbrella is the most needed, it is impossible to carry it open, on-account of the liability of the wind to get under and turn it; or if carried against a strong'wind, the ribs are so much bent in by the pressure as to make it. of little service.

-To prevent these difiicul'ties, I use braces A,`figs. 1, 2, to support the ribs D. One end of each of these braces'is attached to the joint-plate b by a wire, which forms the joint c.

Figurev 3 is a top View of the joint-plate b, detached from the handle C. d is a hole to admit the handle.

'c are notches to receive the ends ofthe braces a, which make the joint c.

Figure 4'is a. sectionof iig. 3'on the line II I. This joint-plate is like the joint-plate E, except .it is so much smaller as to let the ribs D shut down over without coming in contact with it when the frame is closed. The joint-plate 6 is fastened to the handle C by passing a Irivet through the plate and handle. The opposite end of each of the braces a is connected to the ribs D by joints e, and they are arranged so as to bring the ribs straight with the handle when closed; also, so as to give the proper form to the ribs outside of the stretcher-sA when open. This arrangement relieves the cloth of the greater part of the strain which is caused by the pressure of the ribs against it in'ordinary umbrellas when open, consequently the cloth will last longer than when cut small enongh'on the edge toA give form to the ribs outside of the stretchers. Again, in ordinary umbrellas, the ribs become bent by usage, rendering the cloth too loose, which at first was too tight. But the use of these braces it is always kept of' a proper tension, and the wind can neither turn 4nor bend in the ribs whichever way they may be-car'ried. The ribs may also be made lighter than those in ordinary umbrellas, so that those made with the braces are not any heavier than those without them, `but are much stronger and more durable. These braces may be applied with great advantage to old umbrellas, whose ribs have lost their elasticity, as well as to new ones.

In constructing my improved umbrella-frames, I arrange all the parts in the usual way, except the stretcliers F. These I split open at the outer end or joint`f, as far up as the shoulder g, forming the slot h. fig. 6, to allow.

the braces a to.'passthrough. V

Figure 5 is a side view of one of the stretchers detached from the frame. is a hole, through which a rivet put to make the jointf. j is a hole, through which passes the wire c to connect it to the stretcher-slide G,

fies. 1, 2.

a Figure 6 `is a bottom view of fig. 5, showing the slot z, through which swing the braces` a, figs. 1, 2, as the frame is opened and closed. v

Figure 7 is a. side view of one ofthe braces a detached from the frame'. lis a hole, through which a rivet is put to form thejoint e, figs. 1, 2. m is a hole through the opposite end, through which n wire passes to conneet it'to the joint-plate b to make the joint c, figs. .1,v 3, 4.

Figure 8 is a bottom `view of` iig. 7. n is a slot, to connect it to the rib D, and forms the joint e, figs. 1, 2. The bottom side of these braces restson the shoulder g in the slot 7L, figs. 1, 2, 6, when the frames are open. These shoulders act as counter-braces, and render thebraccs a much more firm to resist a pressure on the outside ofthe ribs D than they would be if there were nothing to support them between the two ends. The circular form which I give tc the braces a insures the inclination ofthe braces against the shoulder g in case of a pressure on the outside of lthe'ribs D.

1. I claim providing umbrellas with auxiliary braces, as and for the purpose specified. 2. The combina-tion of the runner b, braces a, vandfribs-D, substantially as described. 3. The arrangement of the stretchers F, having slots h, with the braces a, substantially as described.

i HORACE T.' ROBBINS.

- Witnesses:

A. F. BADGER, WILLIAM EASON.

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