US970681A - Attachment for emery-wheel dressers. - Google Patents

Description

H. G. BUTCHER. ATTACHMENT FOR EMBBY WHEEL DRESSBRS.

APPLICATION FILED no. 3, was.

970,681 Patented Sept 20, 1910.

' HARRY e. BUTCHER, or URBANA, OHIO.

ATTACHMENT FOR EMERY-WHEEL DRESSERS.

Specification of Letters Patent.

Patented Sept. 20, 1910.

Application filed December 3, 1908. Serial No. 465,778.

To all whom it may concern:

State of Ohio, have invented certain new and useful Improvements in Attachments for Emery-Wheel Dressers, of which the following is a specification, reference being had therein to the accompanying drawings.

*This invention relates to improvements in attachments for emery wheel dressers. These dressers, as their name implies, are used to renew the dressing surfaces of emery wheels when they have become worn, glazed or clogged by gathering particles from the metal they are used to polish and reduce. Their active surfaces are so renewed by these dressers, which by abrasion, being harder than the emery wheels, rub off the old surface and leave a fresh surface. But in addition to so wearing, the emery wheels are found to lose their concentricity and to become untrue or eccentric on their peripheries, due to wearing more in some places than others. This is particularly true with the very small emery wheels used by dentists for polishing and grinding teeth and teeth fillings.

" The object of my invention is to provide an attachment for emery wheel dressers whereby the dressers can be utilized to true or renew the concentricity of the emery wheels.

To this end my invention consists in a bracket slidably mounted on or adjustably connected with the body of the emery wheel dresser and adapted to project beyond the dresser and engage with or fit against an object, fixed with relation to the emery wheel, preferably the shaft, so that the dresser can be steadied or held in one position,as well as advanced, from moment to moment, toward and against the surface of the wheel.

In the accompanying drawings forming a part of this specification, on which like reference figures indicate corresponding parts,

Figure 1 is a View of a dresser with my attachment applied, shown in conjunction with a dentists emery wheel for treating teeth and fillings; Fig. 2, a view of a dresser and my attachment in conjunction with a dentists emery wheel for grinding teeth and plates before application to the mouth;

Fig. 3, an enlarged View of the dresser attachment shown alone in perspective; and

Fig. 4, a view of another type of dresser from that shown in Figs. 1 and 2, with my attachment ap lied thereto.

The numera 1 indicates a dentists emery wheel for use in the mouth, mounted on the usual shaft 2 carriedby the chuck 3 and flexible shaft 4 rotatable at a high speed, and the numeral 5 designates an emery wheel dresser of an approved form now generally on the market, consisting of a tube having a handle at one end and filled interiorly with a composition indicated at 6, constituting the dresser proper, being abrasive and hard enou h to attack the emery wheel, though that 1tse1f is very hard, and dress or renew it as before stated. On such, or any other approved type of dresser I mount my attachment, which comprises a body portion arranged to receive the dresser and having a projection adapted to engage a fixed object near the wheel which is being dressed. \Vhen a dresser of the type above described is employed the body portion is preferably arranged to permit of the longitudinal adjustment of the dresser relatively thereto and is provided with means for holding the same in its adjusted position. I11 the present instance I have shown the attachment as consisting of a tube 7 fitted to slide on the dresser and having a slot 8 extending through the same for a portion of its length to render the tubular body compressible by the action of a clamping-screw 9 screwed into one of the lugs 10 and against the other. This constitutes a clamp for clamping the attachment to the dresser, either positively or with sufficient friction to hold the dresser in position when placed against the wheel to be dressed. The attachment further comprises a head 11 constituting a portion against which to press the hand; and also comprises an arm or projection 12 which extends beyond the dresser and is notched, as shown at 13, or otherwise adapted to embrace or engage with an object fixed with relation to the wheel to be dressed, say the shaft of the Wheel. By this means the attachment will hold the dresser in a fixed position when brought up to the wheel, and as the wheel is dressed off on the high places, the dresser is advanced by overcoming the friction between it and the attachment, or by slacking the clamping-screw, so as to follow up, from time to time, against the wheel until the latter becomes true or concentric.

In Fig. 4 I have shown my attachment appliedto another type of dresser, wherein the dresser proper is made of a black diamond instead of a composition, but otherwise there is no change over what is shown in the other figures.

WVhile my invention is applicable for use 1 in treating emery wheels generally as the same are used in factories and machine shops,

I design it particularly for use by dentists, to enable them to true up theiremery wheels, which are usually miniature or small. Practice demonstrates that these little emery wheels lose their concentricity after different periods of use and become practically useless when not nearly otherwise worn out. At present they are cast aside when in this condition. As these wheels are expensive and wear rapidly, it becomes material to correct their want of trueness and thus extend the period of their usefulness until they are literally worn out and not merely nominally consumed. My invention has demonstrated in use its efliciency for this work. My invention is also intended for use in treating wheels made of carborundum orany other material, and in referring to it as adapted for use with emery Wheels, I

wish it to be understood that my invention is capable of use with any kind of an abrasive wheel.

I have herein shown and described the invention as comprising a tubular body portion adapted to receive a dresser and to be held against longitudinal movement therein by friction, but it will be understood that this form of the invention is shown and described for the purpose of illustration only. I

- .The form of the body portion and the manner of securing it to the dresser are imma- 1 terial, but it is preferable that the connection between the two parts should be such that the .dresser may be moved longitudinally t0 the attachment without removing the arm from the'fixed'object by means of which the dresser is supported in its proper relation to the abrasive wheel. This adjustability may struction shown and described, for obvious modifications will occur to a in the art.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is 1. As an article of manufacture, an attachment for abrasive wheel dressers comprising a hollow body portion adapted to receive a dresser and having means to resist the longitudinal movement of said dresser relatively thereto, said body portion also having a hand cont-act near one end and a projection extending beyondthe other end, arranged substantially parallel with said body portion and adapted to engage a fixed object.

2. As an article of manufacture, an attachment for emery wheel dressers comprising a tubular body or sleeve adapted to receive and grip a dresser, having a hand-contact near one end and a projection at the other having a notch at its extremity to embrace a fixed object. n

3. As an article of manufacture, an attachment for emery wheel dressers comprising a tubular body or sleeve slotted part person skilled way, a clamping-screw, and a projection extending beyond the body portion or sleeve and adapted to engage with a fixed ob ect.

with said lugs.

In testimony whereof, I affix mysignature in presence of two witnesses.

HARRY e. BUTGHER. Witnesses I I E. O. HAGAN, F. W. SoI-I ErnR.

4. As an article of manufacture, an at.-

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