US407982A

US407982A - wilmot

Info

Publication number: US407982A
Authority: US
Publication date: 1889-07-30
Anticipated expiration: 1906-07-30

Description

(-No Model.)

METHOD OF ATTAU'HING PLATES TO TUBES. No. 407,982. Patented July 30, 1889.

Ill #755555 N vnzns. homume m c.

UNITED STATES PATENT OFFICE.

SAMUEL R. \VILMOT, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THE IVILHOT & HOBBS MANUFACTURING COMPANY, OF SAME PLACE.

METHOD OF ATTACHING PLATES TO TUBES.

SPECIFICATION forming part of Letters Patent No. 407,982, dated July 30, 1889.

Application filed January 28, 1889. Serial No. 297,760. (No model.) I

To all whom it may concern: drawing the tube from the original disk to Be it known that I, SAMUEL It. WILMOT, a anneal and pickle the blank a number of citizen of theUnited States, residing at Bridgetimes, the operation as a whole requiring export, in the county of Fairfield and State of pensive machinery and skilled labor, thereby,

Connecticut, have invented an Improved as so many operations are required, greatly Method of Attaching Plates to Tubes; and I increasing the costof production.

do hereby declare the following to be a full, By the use of my novel method, which I clear, and exact description of the invention, have developed by a series of experiments, I

such as will enable others skilled in the art to am enabled to take ordinary tubes rolled from To which it appertains to make and use-thesame. sheets of metal and plates as they are re- My invention has for its object to devise a ceived from the punches and attach them tonovel method of attaching plates to tubes, in gether at a single operation in such amanner which the plate shall be closed inward upon that the seam in the tube is closed firmly tothe tube instead of the tube being opened gether and retained thereagainst the possi- 15 outward to engage the plate. This is of esbility of opening in ordinary use. I thuspropecial importance where the tube is rolled duce a combined plate and tube as solid as if from a sheet of metal, the result of my novel drawn from a disk of metal, which overcomes method being to close the scam in the tube the objection of separated parts, while at the firmly together and to prevent the possibility same time I avoid the various operations of 20 of its being opened in use, the tube and plate drawing, annealing, pickling, &c., which being for all practical purposes the same as if makes the integral plates and tubes so exdrawn integral. pensive to produce.

It will of course be understood that my in- In the drawings forming part of this specivention is applicable in all places where it fication, Figure 1 is a View, partly in eleva- 2 5 maybe required to attach a plate to a tube tion and partly in section, which fully illusas, for example, in caster plates and tubes, trates the means by which my novel method which I have selected as ameans of illustrat may be carried into'effect; Fig. 2, an elevaing my present invention. Heretofore the tion of the tube detached, showing the mantubes and plates of furniture-casters of this ner in which it is formed and the way the top 30 class have been made in two ways. In one is closed; Fig. 3, a View of theplate detached, form the tube and plate are formed sepaand Fig. 4E is an elevation of the combined rately,and are shipped to the furniture-nianutube and plate as secured together by my facturer in this condition, the parts being asnovel method. sembled at the time the casters are placed in 1 denotes a caster-tube formed in any suit- 3 5 the articles of furniture in which they are to able manner, ordinarily by rolling up a sheet be used. This form is open to the objection or strip of metal. This tube is usually proof there being so many different parts and vided with a bead 2, which is formed in the the necessity for handling and assembling sheet in the operation of rolling, or after the these different parts by the furniture-manurolling, if preferred, that being wholly imma- 40 facturer when they are used, itbeing of course terial so far as my present invention is con- 0 understood that it is always preferable that cerned. I the parts of manufactured articles should be 3 is the ordinary spring-tongue, by which assembled by the original manufacturer and the caster-shank is held in place, and 4 a disk that the user of the completed article should of metal closed in at the top of the tube, so

45. having nothing to do but to attach it in place. as to form a solid head. 9 5 Another form which avoids the objection 5 is a caster-plate, which is struck out and specified has been to draw both plate and formed to the shape shown by a single operatube from a single disk of metal. This form tion. The outer edge is ordinarily depressed is open to the objection of the great expense and notched, as shown in Fig. 2, so that when 50 of production, it being of course necessary in inverted it may be readily driven into the IOC be understood that'these details of construction have nothing whatever to do with the principle of my invention. I have merely referred to these details in order to illustrate the principle of my invention and to explain its application. The parts are assembled by passing the closed end of the tube through the opening in the plate, bead 2 resting on the depressed portion in the center of the plate when the parts are inverted, as in Fig. 1. The plate and tube are then locked firmly together by closing the depressed portion of the plate against the tube. bly accomplished by suitable dies, as illustrated in Fig. 1.

7 denotes the lower die, which is provided with a central opening 8, which just receives the tube, and is countersunk at the top to receive the depressed portion of the plate.

9 denotes the upper die, theunder side of which inclines outward slightly toward the center, and is provided with a central hub 10, which passes freely within the tube, but does not expand it in the slightest.

Fig.1 shows the exact position the tube and plate assume when placed in the lower die. It will be seen that both parts rest entirely upon the depressed portion at the center of the plate. The upper portion is shown in the.

act of descending at just the position in which This is preferathe operation of closing the plate inward upon he tube commences. It will be seen that as the upper die descends the outwardly-curved portion of the plate will be pressed down into contact with the lower die, while at the same time the tube will be forced downward. The tube, however, will be prevented from expanding in the slightest by its engagement with the sides of opening 8, so that the compression can only be exerted upon the de pressed portion of the plate. This depressed portion is closed upward and inward tightly against the tube, so that when the upper die is raised and the article removed from the lower die the plate and tube will be found to be rigidly and firmly attached together, the attachment being as solid for all practical purposes as if they were made in a single piece. Having thus described my invention, I claim The method of attaching plates to tubes, which consists in forming a bead at the end of a tube and a central opening in a plate, the metal around said opening being depressed,

. substantially as shown and described, then passing the tube through theopening in the plate until the bead rests upon the depressed portion thereof, and then closingthe metal of said depressed portion inward upon the tube, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

SAMUEL R. WILMOT. Witnesses:

A. M. WoosTER, ETTA F. PETTI'I.