US2017753A - Umbrella - Google Patents

Description

Oct. 15, 1935.

H. GOLDMAN UMBRELLA Filed June 12, 1935 Patented a. 15 1935:

UNITED STAT-ES 2,017,753 UMBRELLA Harry Goldman, Chicago,

A Application June 12,

1 6 Claims.

This application is a continuation in part of my applicaiton Serial No. 10,503, filed March 11, 1935. The present invention is directed to an umbrella having a covering of chemicalized silk of extreme thinness and fineness, which is semitransparent, smooth, tough, glossyand water-repellent. In the use of such material for umbrellas, it is necessary to make provision for the reinforcement of the material at the points where it is secured to the caps, which are fitted to the ends of the umbrella ribs in order to prevent fraying or tearing of the material and to reinforce against wear by contact with the rib surfaces at these points. The invention, therefore,

also relates to the special means provided for af- Fig. 5 is a sectional elevation of the same; and

Fig. 6 is a further enlarged cross sectional view on line 6-6 of Fig. 4.

- The covering for the umbrella is cut in the usual form of triangular'sections H], which are connected at their meeting edges along the seam II and provided along the outer margin with a marginal seam |2.

The umbrella frame comprises the usual stick I3, the tubular slide or runner l4 and the radiating'braces 5, which connect with the ribs l6. Each of the ribs is provided at its end with a cap 'I'I preferably of composition material, which is provided with a bore I8 which receives the reduced cylindrical end IQ of the ribs l6, each rib, according to usual practice, being of channel formation except at its outer end, with the open edges of the channel presented inwardly, and the arched end of the channel presented outwardly for contact with the fabric. The cap I! is also provided beyond the bore with a transverse aperture 20 which receives the winding thread 2|.

At each point of connection for the cover is located a reinforcing patch 22, which as shown tapers to a point 23, which contacts with the marginal seam |2at the terminus of the seam The tip points 23 of the patches are united with the marginal seam l2, turning back the latter, together with the tip of the patch, from the position shown in Fig 2 to the position shown 1935, Serial No. 26,104 (Cl. -36) in Fig. 3, after which the winding thread 2| is applied in the manner shown in Fig. 6. 1

The turns of this winding thread 2| are stitched through the material of the covering and through the tip of the patch, as in= Fig. 4, and the turning. in of the marginal seem at the point contiguous to its connection with the cap affords a ridge or hump 24 behind which the'turns of the winding thread lie, so that'there is no possibility for the escape of these threads-beyond 10 the margin of the fabric, which also securely unites the tip or point of the patch into the stitching. The patch is further secured by a medial line v of stitching 25 along the seam leaving the side edges or wings 26 of the free or unconnected.

, The winding thread 2| is passed back and. forth through the aperture 20 in the form'of reverse turns resembling a figure 8, as shown in Fig. 6, which affords a firm, permanent and rein- 20 forced union atthe points of connection for the fabric. After the caps have been united in the manner described, they are fitted on to'the ends of the ribs, which draws the fabric taut and completes the construction of the umbrella.

The above method of reinforcing the fabric at the points of connection is designed to permit the use of chemicalized silk of exceedingly fine quality which is made from Japanese raw silk, dyed to the desired color and subjected to a 30 chemical treatment in a bath of cellulose compound which impregnates the fibers of the fabric and renders it semi-transparent and smooth, tough, glossy and water-resistant, and acts as a preservative against deterioration of the silk fibers.

The material is slightly elastic, and possesses a rubbery surface texture which does not readily crack or' crinkle and is not brittle, but by reason of its extreme fineness and thinness must 40 be reinforced at the tips of the ribs to prevent tearing. The cellulose coating, however, preserves the originalstrengthof the silk and prevents it from becoming brittle, so that it is possible, when reinforced in the manner described, 45

to employ much finer and thinner silk than could be employed if the silk were utilized in itsnatural condition. The cellulose coating serves to cement the fibers together so that its elasticity is reduced and the tendency of the material to become stretched, warped or distorted is practically eliminated, with the result that as the umbrella of the present invention, when properly fitted and stitched and reinforced in the patch 15 manner described, will be drawn out smoothly and evenly upon the frame when the umbrella is opened, and will maintain its taut condition throughout a long period of use.

The impregnation of the fabric renders the texture practically undiscernible save on very close inspection, and renders the material impervious to the passage of water, and presents a continuous unbroken surface as distinguished from the discontinuous surface presented by an ordinary untreated woven fabric.-

Furthermore, the material, being very thin and smooth, may be rolled very tightly and into a small compass when the umbrella isclosed, and the lightness and delicate characterand semi-transparent quality of the covering render the umbrella highly desirable as a sun-shade as well as a protection against rain.

Water will not adhere to the fabric, so that, in the event the umbrella becomes wet, the surface water can be readily shaken off when the umbrella is closed, which, of course, prevents dripping from the-umbrella when closed and prevents rotting of the fabric occasioned by the retention of moisture.

The patches are preferably formed of the same material, and although the patch arrangement has peculiar advantage when used with the particular fabric employed in the present invention,

the method of forming and uniting the patches thin or delicate nature-where reinforcement is desirable in order to prevent tearing.

1. An umbrella covering secured to umbrella ribs, and a reinforcing-patch fch' each point of connection interposedbetween the covering and the contiguous rib and secured to the covering along'an intermediate radial line of stitching extending to the margin of the covering, the side portions of the patch being unsecured and free to overlap the, sides of the rib.

2. An umbrella covering secured to umbrella ribs, and a reinforcing patch for each point of connection interposed between the covering and the contiguous rib and secured to-the covering along an intermediate radial line of stitching extending to tne margin of the covering, the side portions of the patch being unsecured and freetion for thepatch and serving to. maintain connection between the covering, patch and the rib.

'3.-An umbrella covering secured to umbrella ribs,andacapfittedtotbe tipof-eachofthe ribs, apatch interposed between the covering adjacent to its margin and each of the ribs and secured to the covering by radial stitching along the line of contact of the rib and havingits side portions unsecured, 'and a winding thread. entered through the margin of the covering and patch and wound around the exterior of the cap and a contiguous portion of the margin of the covering and patch.

4. An umbrella covering secured to umbrella ribs, and a cap fitted to the tip of each of the 10 ribs and provided with a transverse aperture, a patch interposed between the covering adjacent to its margin and each of the ribs and secured to the covering by radial stitching along the line of contact of the rib and having its side por- 15 tions unsecured, and a winding thread entered through the margin of the covering and patch and through the aperture in the cap and wound around the exterior of the cap and a contiguous portion of the margin of the. covering and patch. 20

5. In an umbrella, including a stick and ribs and a covering for the ribs, said covering being composed of segmental sections united along their meeting edges by radial lines of stitching affording. radial seams and the covering having 25 a reinforced margin, and a cap fitted upon the tip ofeach rib, a reinforcing patch interposed bet'weeii'each riband cap and the covering at its margin and underlying an adjacent radial seam in the covering and stitched thereto along Id its medial line'and unattached along its edges. to afford free wing portions, and a winding entered through the margin. of the covering and wound around the cap to secure the covering to the cap and maintain the contiguous patch in interposed relation between'the covering and the underlying rib and cap.

6. In an umbrella, including a stick and ribs and a covering for the ribs, said covering being composed of segmental sections united along their meeting edges by radial lines of stitching affording radial seams and the covering having a reinforced margin, and a cap'fltted upon the tip of each rib and having a transverse aperture therethrough, a reinforcing patch interposed be-. tween each rib and cap and the coveringat its margin and underlying an adjacent radial seam in the covering and stitched thereto alon'gits medial line and unattached along its edgesto afford free wing portions, and a winding thread entered through the-margin otthe covering through the transverse aperture in the cap and, wound around the cap to secure the covering to the cap and maintain the contiguous patch-in interposed relation between the covering and the iii underlying rib and cap. i

Images