US669633A - Buff-wheel attachment. - Google Patents

Description

' No. 669,633.' Patented Mar. 12, IBM.

" J. H. GREEN.

'BUFF WHEEL ATTACHMENT.

(Application filed Dec. 17, 1900.|

2 Sheets-Sheet I.

{N0 IodeL) NVENTOR m HBREEN. BYATFXW \TNESSES No. 669,633. Patented Mar. l2, il90l.

J. H. GREEN.

BUFF' WHEEL ATTACHMENT.

, (Application filed Dec. 17, 1900.; (No l odel.)

2 Sheets-Sheet 2.

N \T NEESES INVENTOR fwmwia F OHN HEREEN BY A'ITY.

tion through the bufi-wheel attachment. Fig.

drawings, to which reference is hereby made,

. JOHN H. GREEN, OF SPRINGFIELD, ILLINOIS.

BUFF-WHEEL' ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 669,633, dated March 12, 1901.

Application filed December 17, 1900. Serial No. 40,170. (No model.)

T0 on whom it may concern:

Be it known that I, JOHN H. GREEN, a citizen of the United States, residing at Springfield, in the county of Sangamon and State of Illinois, have invented certain new and useful Improvements in Buff Wh'eel Attachments, of which the following is such a full, clear, and exact description as will enable others skilled in the art to which it appertains to make and use my said invention.

My invention relates to buif-wheel attachments such as are adapted for use on sewing-machines, dental lathes, or other similar machines having a revolving fly-wheel.

The purposes of my invention are to provide a buff-wheel attachment so constructed and arranged that it will fit on fly-wheels of different sizes without any special adj ustment of the parts of the mechanism, to provide shouldered and curved arms of improved construction adapted to engage with the perimeter 0f the fiy-wheel on which the device is used, to provide a mandrel-bolt of novel and improved form, to provide simple and effective means for retaining the spring-arms in proper relation to each other, and to provide spring-arms and a securing device therefor so constructed and arranged that said arms may be placed and secured parallel to each other so compactly that the entire device may be packed in much smaller space than it would occupy if the arms were stationary.

With these ends in view myinvention consists of the novel features of construction and combinations of parts shown in the annexed and hereinafter particularly described, and finally recited in the claims.

In the drawings I have illustrated my device as applied to a sewing-machine. It may, however, be applied to dental lathes or other similar machines without any change in the construction of the device.

Referring to the drawings, Figure 1 is a perspective view of the complete device in position on the fly-wheel of a sewing-machine. Fig. 2 is an enlarged longitudinal axial sec- 3 is a vertical transverse section on the line 3 3 of Fig. 2. Fig. 4 is atop plan of the device with the arms placed and secured parall lel to each other. Fig. 5 is a side elevation of an alternative form of the device. Fig. 6 is a horizontal longitudinal section on the line 6 6 of Fig. 5. Fig. 7 is a side elevation of a four-armed device, showing the arms placed to lie side by side. Fig. 8 is an enlarged partial longitudinal section showing a square shoulder on the mandrel-bolt.

Similar reference-numerals designate like parts in all of the views.

I have herein designated my device as a buffwheel attachment and in the drawings have shown a buff-wheel in place on the device; but it is obvious that a fan, a saw, or an emery-wheel may be used thereon without any change in the construction of the device.

The bolt 1 has a hexagonal head 1, a cylindrical shoulder 1 a cylindrical screwthreaded part i and a conical or tapering screw-threaded part 1. Nuts 2 and 3 fit on the cylindrical part 1 In one end of the nut 2 is a circular recess 2, in which the shoulder 1 fits loosely. Curved arms 4, of spring-steel or other springy material, are connected with the bolt 1, as hereinafter explained. The bolt 1 serves to connect all of the arms together. It also serves as a mandrel on which a buff-wheel, a grinding-wheel, or other implement may be mounted. This double use of the bolt is of great practical advantage on account of lightness and simplicity of construction, which are very desirable features in devices of this class. Each of the arms 4 has a curved part 4, adapted to clasp the rim of a wheel, as shown in Fig.1, a shoulder 4 which abuts against a face of the bolt-head l when the parts are assembled as shown in Figs. 1 and 3, and a part 4 at a right angle to the part 4 and pierced by a hole in which the shouldered part 1 of the bolt 1 fits. All of the arms 4 are exactly alike, except a slight variation in length, such that when the arms are assembled on the bolt 1, with the parts 4 overlapping, as shown, the free extremities of the arms will all project exactly the same distance beyond the bolt-head 1 When the arms 4 are in place on the bolt 1, as shown in Figs. 2 and 4, the nut 2 presses against the parts 4, so as to clamp all of the arms firmly together, and the bolt-head l,

against the faces of which the shoulders 4 of the arms respectively abut, prevents the arms from turning on the bolt. The nut 3 serves as a jam-nut to prevent the nut 2 from turning. It may also be used to secure a grinding-wheel, a saw, or other implement placed on the bolt 1, between the nuts 2 and 3, as shown in Fig. 5. When the nuts 2 and 3 are unscrewed, the arms 4 may be separately turned on the bolt 1 to lie side by side, and the nuts may then be screwed down to secure the parts in the position shown in Fig. 4. When the parts are in this position, the device occupies much less space than it does when the arms are spread and may therefore be compactly packed in a relatively small package. This feature is obviously of practical advantage on account of the greater convenience in handling and the diminished cost of package and transportation. By reason of the springiness of the arms 4 they readily adapt themselves to Ely-wheels of different sizes without any special adjustment of the mechanism.

In the drawingsl have shown a bolt having a hexagonal head and three independent arms respectively contacting with three faces of said bolt-head; but a bolt having a head of any other suitable polygonal form and any other suitable number of arms contacting with the faces of said bolt-head may be used Without departing from my invention. For example, a square-headed bolt and two arms contacting with opposite faces of said square bolt-head may be used, or a bolt having a square head and fon r independent arms, each contacting with one face of said bolt-head, as shown in Fig. 5, may he used. It is essential only that the arms shall be mounted on a bolt common to all in such manner that the arms may be held firmly on and turn with the bolt and may also be adjusted so that all of them will lie side by side, substantially as set forth.

Instead of using a bolt having a hexagonal head and a cylindrical shoulder and shouldered arms abutting against the faces of the bolt-head, as shown in Figs. 2 and 3, I may, without departing from my invention, use a bolt having a polygonal head and a polygonal shoulder and arms having polygonal holes fitting on the shoulder of said bolt and shoulders fitting against the faces of the bolt-head, substantially as shown in Figs 6 and 8.

In practical use the arms are sprung apart to permit the points of the arms to pass over the perimeter of the wheel, and when in place the springiness of the arms acts to cause the curved extremities of the arms to firmly grip the wheel.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a device of the class described, springy arms each having a shoulder and each having a hole adapted to receive a bolt, in combination with a bolt passing through the holes in said arms and having a head with faces against which the shoulders on said arms respectively abut, and means for securing said arms on said bolt as set forth.

2. In a device of the class described, the

combination of a mandrel-bolt, arms mounted on said mandrelbolt and a securing device securing said arms on said mandrel-bolt, as set forth.

In witness whereof I have hereunto subscribed my name, at Springfield, Illinois, this 10th day of December, 1900.

JOHN H. GREEN.

Witnesses:

FRANK G. LISTER, MAY F. RYAN.

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