CA2080749A1 - Stop apparatus for collet end - Google Patents

Abstract

SUBSTITUTE
REMPLACEMENT
SECTION is not Present Cette Section est Absente

Description

20807 ~9 Backqround of the Invention Present lnvention relates to a mechanlsm generally known as "Stop".
Purpose of this apparatus is to allow to establish a reference point against which work pieces and all~e in situations as machining, marking, measuring etc can be performed at a consistent accuracy and considerable ease. This type of apparatus is generally used at the back end of collet or at the end of machine spindle.
Prior Art Normally this reference point is established by securing a threaded body at the end of collet or machine spindle. This method is not always possible without much trouble since all spindles and collets do not have threaded ends. In this case some other method must be utilized. Subject invention just accomplishes that. Method by which this subject invention accomplishes the intended purpose is also not limited to only round tubular shaped collets and spindles.
Examination of the attached drawings, preferred embodiment, claims and other information disclosed in this subject invention to those skilled in the art will be apparent that shape of the collet or spindle does not re~uire one to depart from the scope of this sub~ect inventlon.

208~7~9 Summary of the Invention Apparatus in the sub~ect invention consists of few simple mechanical parts assembled such as shown in Fig. 1 of the attached drawings.
Subject apparatus has a sleeve ~1) having outside machined to shape and reasonably close to the size o~ the spindle (6) bore and having a shoulder to seat at the spindle end. Then there is a mating part (2) to fit inside that conical sleeve(1) and this part has internal threads. Then there is a threaded and hollow sleeve(3) to fit inside the threaded portion of part(2). This sleeve also has a threaded hole perpendicular to axis to allow a screw(4) to be inserted into. Through this sleeve passes another member(5) which is slideable to the desired position and held down by screw( 4 ) ~

20~7~

Brief Descri~tion of Drawinqs Scope and object of subject apparatus will become more apparant to those skilled in the art in light of the accompanying drawings and study of the preferred embodiment attached.
Fig. 1 Shows first preferred embodiment of the apparatus.
Fig. 5 Shows second preferred embodiment of the apparatus.
Fig. 2 Shows expandable sleeve as will be used in the first embodiment as shown in figure(l).
Fig. 6 Shows expandable sleeve for use on square shaped hollow tube but is also not limited to exclude rectangualr oval or polygon shaped tubes.
Fig. 3 Shows mating part to sleeve(l) of fig(l) and Fig(2) and Fig(6) expandable sleeve.
Further to above:
Fig. 1 Shows assembled apparatus consisting of expandable conical bored sleevetl), mating conical nut(2), mating threaded hollow sleeve(3), slideable member(5) securing screw(4) and(7) being threaded hole in sleeve(3).
Fig. 2 Showing sleeve(l) in detail as lA being shoulder, lD as conical bore, lC a slit parallel to axis of said sleeve.
Fig. 3 Showing conical nut(2) and 2C being conical surface and 2A
being head of the nut, 2B being flats for the purpose of adjusting and 2D as internal threads.
Fig. 4 Showing hollow threaded sleeve(3) and 3A being head of the sleeve, 3C hole through the axis, 3D being threads to mate 2D of Fig. 3 of the sleeve and- 3B being flats for adjusting purpose and 7 is a threaded hole for inserting screw (4) of Fig. 1.
Fig. 5 Showing alternate embodiment by constructing the subject apparatus inverted to as described in the first embodiment.
Fig. 6 Showing alternate shape of sleevetl) of Fig. 1 for other alternate shaped spindles or collets.

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208~749~

Description of the Preferred ~bodiment Referring now to the drawing, Fig.(l) showing the first preferred embodiment of the subject invention and Fig(5) sho~s alternate embodiment of the apparatus.
As shown on the drawings, first preferred embodiment consists of part (2), (3), (5) made of hexagon material for ease of manufacturing but the scope i5 not limited to such practice.
Sleeve (l) in Fig. 1 is made of expandable materlal such as plastic, polymer, nylon, delrin, etc but i5 not limited to and can be of brass, aluminum or treated steels, alloys, etc. Part(4) in Fig. 1 is a screw of commercial type.
Part(l) also shown in Fig(2) is expandable sleeve with conical bore through the axis, have a shoulder(lA) and a slit cut parallel to conical bore as (lC) Fig(2) to allow expansion. Said sleeve is inserted into the end of the hollow tubular spindle (6) of Fig(l) of machine or collet. Then inserted is a mating threaded part (2) of Fig(l) and pushed as far as possible. Then there is a threaded hollow sleeve(3) of Fig(l) which is threaded substantially all the len~th into part(2) of Fig(1) now holding the part(3) of Fig.1 unscrewing action is exerted on part (2) of Fig l. This action causes the sleeves(l) of Fig. 1 to expand further through push of conical surface 2C of Fig(3) and secure tightly in sleeve(6) of Fig(1), then part 5 of Fig(l) is inserted into part 3 of Figl and slided to the desired position and secured by screw(9) of Fig(l).

The subject invention thus provides an apparatus that can be installed at the end of hollow tubular member regardless of this member being internally threaded, plain, or irre~ularly shaped.
While salient features of the invention have been illustrated and described it should be readily apparent to those skilled in the art that many changes and modifications can be made to the invention presented without departing from the spirit and true scope of the invention. Accordingly, present invention should be considered as uncompassing all such changes and modifications of the inventions that fall within the broad scope of the invention as defined by the appended claims.

Claims (3)

1) A mechanism generally referred to as "Stop" in the art of manufacturing for the purpose of establishing a reference point for the purpose of machining, marking, measuring, etc as disclosed in the subject invention, consists of a expandable member to be able to slide into tubular spindles or collets, having an internal conical bore parallel to axis. Said sleeve to have one or more slits parallel to axis to allow expansion and or compression of the said sleeve.

2) Then there is mating part to the expandable sleeve of claim(1) have external conical surface capable of being inserted into the said conical sleeve and have internal or external threads.

3) Then there is another member which will be threaded to the conical member of claim (2) capable to be threaded to the said conical member by means of external or internal threads.
Purpose of these threads is to increase engagement of the conical surface of part of claim (2) into the expandable sleeve of claim(1).