US2644442A

US2644442A - Diamond tool assembly

Info

Publication number: US2644442A
Application number: US173751A
Authority: US
Inventors: Jr Joseph Loecy
Original assignee: Individual
Current assignee: Individual
Priority date: 1950-07-14
Filing date: 1950-07-14
Publication date: 1953-07-07
Anticipated expiration: 1970-07-07

Description

July 7, 1953 J. LOECY, JR

DIAMOND TOOL ASSEMBLY Filed July 14, 1950 FIG 4 I INVENTOR." 1

J-OJEPH Loscx J? Arraqmsys Patented July 7, 1 953 ICE DIAMOND TOOLVASSEMBLY Joseph Loecy, Jr., Euclid, Ohio Application July 14, 1950, Serial N 0. 173,751

4 5 Claims. (01.125 11) The present invention relates to the art of diamond tools for dressing grinding wheels and is an improvement upon-the device disclosed in my co-pending application Serial No. 62,449, filed November 29, 1948,-as well as that disclosed in my co-pending application Serial No.134,964, filedDecember 24, 1949. p f

According to the regular practice, as more fully explained in the above-noted applications,

a diamond tool is adapted to be moved at intervals into position for operative engagement with a grinding wheelfor dressing the same; and, in order toalways present a new sharp point and to prevent the diamond from wearing unevenly, the workman has heretofore been depended upon to turn the diamond tool. But experience has shown that the workman can not be depended upon always to make these adjustments when required and to theproper degree.

Therefore, in the present application as in those above noted, the object is to devise an'assembly in which the diamond tool may be turned slightly by combined hydraulic and mechanical means so as to always present a new sharp point of the diamond to the wheel and thus prevent uneven wear of the diamond. a

A more specific object is to provide such a device with means for producing the. desired degree of rotary adjustment of the diamond point with a'comparatively small longitudinal clearance of the adjusting means therefor.

Another specific object of my present form of invention is to provide an improved and positive form of means for ensuring adjustment of the diamond tool in onlylone directionrotatably about thelongitudinal axis thereof.

Other objects will appearfrom the following description when considered together 'withrthe Y accompanying drawing and claims.

Fig. 1 is an elevation of a complete unit which embodies my present invention;

Fig. 2 is a longitudinal sectional forward end portion thereof; 1

Fig. 3 is a sectionaliview taken 'on line 3-3 view of the of Fig. 2; and r Fig. 4 is a sectional view taken on line 4--4 of Fig.2. i

It is to beunderstood that the present'form of disclosure is merely for the purpose of illustration and that theremight be various modifications thereof without departing from the spirit of my invention as herein-set forth andclaimed. My present assembly may be mounted, upon or attached to any type of grinder; for instance, the spindle-shaft S ..of..the-dresser barrel B-Lof such a machine may have this device mounted thereupon in the manner indicated in Figs. 1 and 2 of the present drawing. My present device is of such design as to be of substantially the same cross sectional diameter and form as the dresser barrel B soas to constitute virtually a continuation thereof in form and appearance. This arrangement has also a decided mechanical advantage with respect to the positioning of the tubular ducts for the hydraulic fluid, as will be understood.

The turner body I, which is mounted upon the spindle shaft S, has provided within the outer end thereof the plunger 2 which is adapted for limited straight-line movement therewithin, there being suitable space allowed with respect to the fixed end cap 3, and theannular wall of the plunger 2 being provided withsuitable clearance for such movement. The plunger 2 may be so mounted as to have its longitudinal axis .at an angle'to that'of the body I.

Extending radially inwardly from the cylindrical wall of the recess at the forwardend of the body I, there is provided the fixed pin 4 which has co-operative engagement within the inclined slot 5 in the outer surface of the plunger 2; in fact, the outer surface of the plunger 2 may beprovided with a plurality of such slots at as many different anglesso that any one of them may be employed in connection with the pin 4 according to the degree of turning movement of the plunger 2 that is desired for a given longitudinal movement thereof. z

The pin 6, which extends radially inwardly from the inner surface of the plunger 2, has operative engagement within the slot 1 which is provided in the outer surface of the annular transmitting ring 8 and which is inclined in the opposite direction from that of the slot or slots 5 so as to amplify the rotary movement of the ring 8. j

The inner surface of the ring 8 is adapted to have one-way locking. engagement with the enlarged cylindrical rear end portion 9 of the tool holder I0 which has the tool H screwed into. the forward end thereof, with the diamond point !2 at the outer end of the tool II. This locking engagement may consist of the spring-pressed pins I3 which are arranged within the recesses M in the periphery of the enlarged portion 9 and which are adapted to have one-way binding engagement in the wedge-shaped spaces provided between the walls of their notches and-the inner pins l3 are indicated at l3a and are seated in wells in the rear walls of the recesses 14.

Rotary movement of the plunger 2 and the ring member 8 in one direction will, by virtue of the one-way clutch means, carry the tool-holder l therewith as part of the unitary assembly; but, when the plunger 2 and ring member 8 have rotary movement in the opposite direction, the clutch means will not be effective and the plunger and ring member 8 will turn alone and without turning the tool holder [0. In the present form of illustration, forward movement of the plunger 2 and ring member 8 will result in rotary movement of the same and also of the tool holder H], but the plunger 2 and ring member 8 in their rearward movement will not cause any turning movement of the tool holder 10. As a result, the tool holder and its diamond point will be turned in only one direction and there will always be ensured a fresh portion of the diamond point for the dressing operation.

Within the chamber provided within the main plunger 2, there is provided what may be termed a back-stop I5 which has a circular disk portion of less diameter than that of the chamber therefor and which has a stem portion l5a extending rearwardly out through the rear wall of the main plunger 2. Suitable sealing means l5?) surrounds the stem 5a, and suitable sealing means are provided also about the tool holder l8 and about the main plunger 2, as indicated by reference numerals la and 2a, respectively.

Hydraulic fluid may-be supplied to the rear end of the main plunger 2 through the tube or duct [6 provided within the turner body I and extending through the dresser barrel B; and likewise, the hydraulic fluid may be supplied to the forward end of the main plunger 2 through the tubular passage l'l in the turner body and extending through the dresser barrel B. Cooling fluid may be supplied through tube l8 to the point of dressing. The tubes l8 and H are connected to a suitable control valve like that shown in the above-noted co-pending application Serial No. 134,964, to which reference may be had for a fuller understanding with respect to this feature. Suffice to say, when the valve is set in one position, the hydraulic fluid may be applied to the rear end .of the main plunger 2 through the duct 16 so as to move the plunger forwardly while the fluid fills the space at the rear thereof and while the fluid at the forward end of the main plunger is forced out through the tubular passage l1 and through the valve to the reservoir for the hydraulic fluid in the same manner as more fully explained in the above-noted co-pending applications. Then, when the valve is set in its other position, the reverse flow of the hydraulic fluid will take place; that is, it will be applied through duct H to the front end of the main plunger 2 so as to force the same rearwardly and, at the same time, the fluid at the rear of the main plunger will be forced out through the tubular passage i6 and the valve to the reservoir. vIt might be explained that there is sufiicient clearance between the inner surface of the main plunger 2 and the outer surface of the ring 8 to permit the hydraulic fluid to pass therebetween, during rearward movement of the main plunger, and to flll thespace within the main plunger to the rear of the disk portion iii of the back-stop which remains stationary during the movements of the main plunger; and the pressure: of the hydraulic fluid within this space will serve to ensure that the member l5 wil1 be maintained 4 in the position indicated in Fig. 2 of the drawing so as to hold the enlarged portion 9 against the fixed end cap 3, as seen in Fig. 2. Here it might be pointed out that the ring 8 and tool holder l0 have only turning movement about the longitudinal axis and do not have longitudinal movement therealong. Slight clearance may be provided at the forward end of ring 8 so as to ensure against the same sticking. My present improved device may be mounted for movement laterally into and out of engagement with the work.

As above explained, the forward movement of the main plunger 2 by the hydraulic fluid is converted into a turning movement thereof by virtue of the pin and slot mechanism, with the result that the main plunger 2 has a spiral movement about the'longitudinal axis of the device. Such movement of the main plunger will, by virtue of the pin and slot connection with the ring 8, cause an amplified turning movement thereof; and, with this arrangement, there may be obtained the desired degree of turning movement of the ring 8 with a comparatively short longitudinal movement of the main plunger. As also explained above, the'turning of the ring 8 will effect locking engagement thereof with the tool holder and these two parts will turn together as a unit so as to adjust rotatably the position of the tool holder'and the diamond point carried thereby. When-the tool holder has been rotatably adjusted in the'manner explained, it will be eflectively held in suchposition by the pressure of the hydraulic fluid which will hold the enlarged portion 9 of the tool holder against the end cap 3. To repeat, such turning'of the tool holder takes place-only duringthe. movement of .the main plunger 2 in one direction-thereof, in the forward direction according to the present form of illustration, by virtue oftheparticular arrangement of the oneway "clutch engaging means between the ring 8 andxthe 13001 holder. I8. Whereas such engagement iseffective during movement of the main plunger 2 its'one direction, there will be free relative movement between the tool holder I0 and the ring 8 during the movement of the main plunger-:2 in the opposite direction.

Notable among the practical advantages of the presentiformzof device is the positive and dependablecharacterof the automatically effected operation of themeans for producing the turning movement of the tool holder in only one direction, that is during the movement of the main plunger in only one direction, and with a relativelyishort'extent of such longitudinal movement of the main plunger. Furthermore, the entire mechanism is of comparatively simple and compact rorm andis capable of operationin an efficient and dependable manner as has already been demonstrated by actual use of this device in the trade.

What'L claim is:

1. In a device of the class described, the combination ofa cylindeig aplunger within said cylinder and reciprocatable therewithin, means including hydraulic means connected to said cylinder for effecting such reciprocatable movement or saidrplunger:pin andinclined slot means operatively :arranged between said cylinder and plunger for converting the'forward and rearward movement of said'plunger into rotary movement there'of,-an annular-ring within'said plunger and havingpin and inclined slot means of connection withsaid plungerfor amplifying the rotary movement orsaid annular .ringbysaid plunger, a tool holder within said annular ring, and one-way means of clutch connection between said annular ring and said tool holder for transmitting tov said tool holder said amplified rotary movement of said ring in only one direction thereof.

2. In a device of the class described, the combination of a cylinder with an inwardly extending "front end cap portion, a plunger within said cylinder and reciprocatable therewithin, a tool holder extending through said inwardly extending forward end cap portion and having an enlarged rear end portion located within said plunger with lateral clearance between said tool holder and said plunger, the enlarged rear end of said tool holder being spaced from the rear wall of said plunger and having its front end adapted for engagement 7 with-the said cap portion, means connected to said cylinder for moving said plunger forwardly or rearwardly, means of operative connection between said cylinder and plunger for automatically converting the forward and rearward movement of said plunger into rotary movement thereof, and

means of operative connection between said plunger and tool holderfor transmitting to said tool holder the rotary movement of said plunger in only one direction.

3. In a device of the class described, the combination of a cylinder, a plunger reciprocatable' within said cylinder, operating means for said plunger including hydraulic pressure means connected to said cylinder for effecting straight-line movement of said' plunger and including also means of operative connection between said plunger and cylinder for converting the straightline movement of said plunger into rotary movement of said plunger, a tool holder, and means of operative connection between said plunger and tool holder including means for transmitting to said tool holder an amplified turning movement in only one direction thereofi 4. In a device of the class described, the combination of a cylinder, a plunger within said cylinder and reciprocatable therewithin, hydraulic means connected to said cylinder for moving said plunger forwardly and rearwardly, means of operative connection between said cylinder and plunger for automatically converting the forward and rearward movements of said plunger into rotary movement of said plunger, a tool holder, and means of operative connection between said plunger and tool holder including means for transmitting from said plunger to said tool holder an amplified turning movement in only one direction thereof.

5. In a device of the class described, the combination of a cylinder, a plunger within said cylinder and reciprocatable therewithin, hydraulic means connected to said cylinder for moving said plunger forwardly and rearwardly, means of op- I erative connection between said cylinder and plunger for automatically converting the forward direction thereof.

JOSEPH LOECY, JR.

References Cited in the file of thispatent UNITED STATES PATENTS Number Name Date 140,637 Nutting July 8, 1873 416,147 Edgerton Nov. 26, 1889 886,407 Rice May 5, 1908 1,3532? 5 Scheider Sept. 21, 1920 1,588,406 Gilman June 15, 1926 1,946,309 Cofiman Feb. 6, 1934