US1373835A

US1373835A - Glass-grinding machine

Info

Publication number: US1373835A
Application number: US305362A
Authority: US
Inventors: Edward A Ryon
Original assignee: FRED W SIEMENS
Current assignee: FRED W SIEMENS
Priority date: 1919-06-19
Filing date: 1919-06-19
Publication date: 1921-04-05
Anticipated expiration: 1938-04-05

Description

E. A. RYON.

GLASS GRINDING MACHINE.

APPLICATION HLED JUNE 19' 1919.

Piatented Apr. 5, 1921..

4 SHEETS-SHEET liii/ 414 m E. RYON. v GLASS'GRINDING MACHINE.

APPLICATION FILED JUNE 19. 1919.

Patented Apr. 5,1921.

4 SHEETS-SHEET Z.

E. A. RYON.

GLASS GRINDING MACHINE.

APPLICATION FILED IUNE I91 I919.

, Patented Apr. 5, 1921.

4 SHEETS-SHEET 3- E. A. RYON.

GLASS GRINDING MACHINE.

APPLICATION man mums, 1919.

Patgnted Apr. 5, 1921.

4 SHEETS-SHEET 5.

. special reference to PATENT crease. I

EDWARD A. RYON,

OF WELLSBORO, IENNSYLVANIA, ASSIGNOR TO FRED W. SIEMENS,

OF WELLSBORO, PENNSYLVANIA.

GLASS-GRINDING MACHINE.

Specification of Letters Patent.

Patented Apr. 5-, 1921.

Application filed June 19, 1919; Serial No. 305,362.

T 0 all who'm't't wmy' concern: I

Be it known that I, EDWARD A.'RYON, a citizen of the United States, and a resident of \Vellsboro, county of Tioga, and State of Pennsylvania, have invented certain new and useful Improvements in Glass-Grinding Machines, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

My invention relates to glass grinding machines which are adapted to produce decorated or cut glass articles and has machines of the general character shown and described in my Patents Nos. 1,251,114 and 1,251,115 of December 25, 1917.

One object of my present invention is to provide a simple, durable and compact machine of the aforesaid character that shall be adapted to operate automatically at a relatively high speed and that shall require only the service of a comparatively unskilled attendant.

Another object is to provide a reliable clamping device that shall be susceptible of ready manipulation and shall hold the tumbler or other glass article on which the work is to be done, securely in position.

Another object of my invention is to provide in a machine of the aforesaid type, simple and improved means for automatically changing the position of the glass between the cuts of the grinding wheel,.which 'shall con'iplete'more than a single design made up of a plurality of cuts, for each rotative movement of the holder about the spindle of the machine as an axis.

Other objects and advantages of my invention will be hereinafter set forth and in order that my invention may be thoroughly understood I will now proceed to describe the same in the following specification, and then point out the novel features thereof in appended claims.

Referring to the drawings: Figure 1 is a front elevation of a machine arranged and constructed in accordance with my invention and constituting an embodiment' thereof.

A partial plan v ew of the grinding wheel including stops which determine the depth of each cut is shown in Fig. 2.

Figs. 3, 4, 5 and 6 are sectional elevations taken respectively on the lines 3-3, 4-4, 5-5 and 6-6 of Fig. 1.

on the bracket 29 having a hub 30 in the arm Figs. 7 and 8 are detail views of the stop mechanism which is adapted to bring the machine to rest when a tumbler or other article is completely decorated.

Fig. 9 is a detail plan view showing the operation of the release rod.

Fig. 10 is a sectional elevation, taken on the line 10-10 of Fig. 1.

Fig. 11 is a sectional detail showing the support for the ratchet lever.

A sectional elevation of the driving shaft and clutch is shown in Fig. 12.

Figs. 13 and 1 1 are sectional elevations on the lines 13-19 and 14.14 of Fig. 12.

Fig. 15 is a sectional elevation showing the work holder or clamp and its actuating mechanism on a larger scale.

Fi 16 is a plan view of the part shown in Fig 15, and

Figs. 17 and 18 are sectional plans taken lines 17-17 and 18-18 of Fig. 15.

F mined/ridcutting wheel.

The frame of the machine comprises a base 20 to which is secured a main bracket or head stock 21, and a wheel bracket 22 011 which a grinding or cutting wheel 23 is supported in adjustable bearing blocks 24.

Mounted on the bracket 22 are a pair of stops 25 which extend close to the cutting edge of the wheel and have their ends squared off into a single plane as indicated at 26, to engage the glass and limit the depth of the out which is niade in the work.

' The wear of the wheel is compensated for by adjusting the bearing blocks 24 which may be accomplished in'any suitable manner as, for, example, by adjusting screws 27 Work holder.

Rotatively mounted in the head stock or bracket 21 is 'a spindle 28 which is adapted to be axially reciprocated as hereinafter explained and extends beyond the/bracket in j the direction of the cutting wheel, its axisv being preferably in the central plane of the wheel. The work holder, as clearly shown in Fig. 15, comprises an L-shaped which is mounted on and secured to'the extension of the spindle. A shaft 31 is rotatably supported 32 of the bracket 29 with its axis perpendicular'to .the axis of the spindle...

A plug 33 is secured to the shaft 31 and is adapted to fit into a tumbler or other article to be decorated on the machine. A clamp 34 which is adapted-to engage the edge of the glass is also mounted on the shaft 31. Furthermore, the glass is held in position by means of a clamping screw 35 which is coaxial with the shaft 31 and is mounted in a pivotal arm 36. This arm is supported by the body of the bracket 29 and may be swung to one side to permit the glass to be' mental jaws have conical surfaces 44 to cooperate witha correspondingly curved surface 45 of the clamping ring. The arrangement of parts is such that a tumbler' or the like may be mounted on the block 33 and extend into the cylindrical opening provided by the jaw segments. By turning the internally threaded ring or nut 41 the jaws are forced radially inward on account of the wedging action of the

cobperating surfaces

44 and 45, and securely clamp the tumbler in position. Since the jaws are symmetrically arranged and are concurrently actuated the glass is clamped in a coaxial position relative to the shaft 31 on which the plug 33 and the block 37 are mounted.

The arm or projection 32 of the L-shaped bracket 29 has a yoke extension 46 which provides spaced bearings 47 for the shaft 31, a ratchet 48 and a pawl carrier 49 being interposed between the spaced bearings. The pawl carrier is pivotally mounted to turn about the shaft 31 as an axis and a pawl 50 is pivoted thereon and is pressed against the notched edge of the ratchet 48 by a spring 51. A ratchet lock 52 is pivoted at 53 on the bottom of the arm 32 adjacent to the pawl carrier 49 so that a single member, as hereinafter explained, is adapted to release the lock and actuate the pawl. The pawl carrier and lock are respectively retracted by

springs

54 and 55.

The ratchet 48 has a downwardly extending pin or lug 56 which is adapted to actuate a trip and stop the machine when the tumbler has turnedthrough a complete revolution about the shaft 31 as an axis.

stock or bracket 21. It has secured to it a collar 59 slotted at 60, a toothed ratchet tending projection {72 which extends through a slot 73 in a yoke 74 of the bracket 21.

Driving shaft and actuating mechanism.

The actuating lever 71 is pivotally secured to an upwardly extending lug 75 of the bottom of the bracket 21 by means of a pivot pin 76. It is formed to provide a pair of side rods or bars which extend on opposite sides of the spindle 28 and are connected by webs 77 and 78. A driving shaft 79 is rotatively mounted in the head stock 21 below the spindle and substantially in parallelism therewith. It extends through the actuating lever 71 between the webs 77 and 78 as clearly shown in Fig. 5, and has an annular cam 80 affixed to it in the plane of the actuating lever. Depending from the web 77 of the actuating lever is a projection 81 which extends into the cam groove of the annular cam 80 so that as the driving shaft 79 is rotated. the actuating lever is oscillated about the pin 76 as an axis. As a result a'longitudinal or axial movement is imparted to the spindle 28.

The driving shaft is provided with a clutch pulley 82 which is so arranged that it may be released to stop the machine. The clutch pulley 82 comprises a driving pulley or sheave 83 having a hub 84 rotatably mounted on the outer end of the driving shaft 7 9. The pulley is held in place by a pair of spaced collars 85 which are inned or otherwise secured to the driving s aft, a cylindrical keyway 86 being cut partly in the shaft and partly in the collars to form bearings for a semi-cylindrical key 87. The inner end of the keg is bent at an angle to the axis of the sha' as shown in Fig. 12, and has a spring 88 connected to it and tendin g to hold it in looking position in Fig. 14. The bore of the sheave hub 84 is provided with a plurality of recesses 89 which are complementary to the key slot in the shaft and are adapted to be engaged by the semi-cylindrical key 87, provided the latter occupies the position shown in Figs. 12 and 13, in which it is held by the spring 88.

@n the other hand, if the outwardly extending arm of the key 87 is engaged by a stop rod 90 for example, and is swung in opposition to the spring 88, the key. will move to such position as to release the pulley from the shaft. The action of the stop rod 90 will be hereinafter explained.

Afiixed to the driving shaft 7 9 is a cam block or eccentric 91, the peripheral surface of which is engaged by a link 92 universally pivoted at 93 as shown in Fig. 11. The link 92 is held against 'the cam surface by a spring 94 and is connected at its outer end to the pawl carrier 65. The parts and. 92 form a toggle joint and the action of the eccentric or cam 91 when the driving shaft is rotated, is such as to oscillate the pawl carrier 65 and advance the ratchet 61 step by step. It is by this means that the spindle 28 is rotatively advanced between cuts while the actuating lever 71 and the annular cam are relied upon to effect the forward and back motion of the spindle which advances the work toward and from the cutting wheel.

The brake band 68'prevents an overrunning or a backward movement of the spindle which might otherwise result from the action of the ratchet pawl 62 which of course intermittently andsuccessively engages the ratchet teeth.

The universal pivot 93 may be constructed in any suitable manner and as shown in Fig. 11, comprises a block 95 having a cylindrical stud projection 96 which is rotatively mounted in the bracket 21 and is held in place by a pin or set screw 97, the inner end of the set screw being arranged to en- "age an annular groove 98 in the 'studpro-- ection. The outer end of the block 95 is slotted to form jaws which receive one end of the link 92, the joint being completed by a pin 99.

Stop mechanism.

A bell crank lever 100'is pivotally mounted on the driving shaft 79 adjacent to the inner section of the head stock. As shown in Figs. 1 and 4. arm 101 of this lever extends upward adjacent tothe spindle 28 and has a laterally extending pm 102 which is in position to engage the outer periphery of the collar 59 and enter the slot 60 when the spindle is at the outer end of its axial stroke and the bell crank lever is released, The other arm 103 of the lever extends downwardly in position to be engaged by a hub 104, of a handle 105.

The handle 105 is secured tothe release rod which is slidably mounted in the bracket 21 being looselyfitted into an opening 106 in the inner branch of the bracket as shown in Fig. 8. The rod is provided with a notch 107 which is adapted to be engaged by a stationary finger 108, which thus serves to hold the rod at the outer extremity of is axial movement in opposition to a spring 109 which tends to movethe rod. to the opposite end of its travel determined by the engagement of a collar 110 with the'outer section of the head stock (see Fig. 1). 1

A spring 111 presses-the rod upwardly so i i,

that it is held in the top .of the opening 106 except when it is released. This is effected I the rod through an' angle suifi cient to turn the slot 107 out of engagement by turning with the finger108. This turning maybe done manually by grasping the handle 105 if desired, or it may be done automatically, as hereinafter explained, by the tripping action'of the pin 56 of the ratchet 48,'upon. ection 112 which is ada lateral arm or pro justably securedto the outer end of the rod 90 by a set screw 113, as shown in Fig. 8.

The hub 104 of the handle 105 is vided with a cam surface 114 in order that the slot 60 as soon as the slot comes into registering position.

A pair of adjustable pins or

projections

115 and 116 are screw-threaded into and extend through the section of the bracket 21 which is adjacent to the cutting wheel. They are symmetrically spaced on opposite sides so i of-the axisof the spindle 28 and extend into the path of movement of the ratchet lock 52 and the pawl carrier 49, the arrangement of parts being such that with each complete revolution of the spindle the-ratchet lock 52 is released and the pawl carrier actuated to advance the .ratchet twice.

Operation.

The operation of the machine is as follows, assuming that the partsoccupy the positions in whlch they are shown in Fig. 1,

if power is applied to the driving pulley 83 the driving shaft will be turned together with the annular cam 80 and the cam or ec- 'centric 91. The cam or eccentric 91 actuates the links 92 and 65 so as to advance the spindle'28 to a predetermined position in.

which it is securely held by the actuating brake-band 68 as already explained. The annular cam now begins to act with the result that the lever 71 is oscillated and passes the spindle 28 toward the cutting wheel.

The cutting wheel is of course driven at a high rate of speed and the glass tumbler which is designated 120 is brought into contact with the cutting edge of the wheel so that a single cut is produced, its depth being positively fixed by the stops 2. 5.

As the rotation-of the driving shaft continues the spindle isretracted and at the same time the cam or eccentric 91 comes into position to again actuate the ratchet and r0- tatively advance the spindle.

Two cuts are thus produced at an angle to each other and the spindle has advanced substantially 180 degrees. The ratchet lock 52 is now released by the engagement of these parts with the adjustable pin projection 115 and immediately thereafter the ratchet is advanced by the movement of the pawl carrier 49 in opposition to the spring 54. The ratchet 48 is thus advanced one or more notches, the shaft 31 being correspondingly turned and the tumbler being rotated through a relatively small arc to a new position in which a second series of cuts is to be produced.

By the repeated action of the annular cam and the spindle ratchet, another set of cuts is produced. The glass and the work holder have now turned through substantially a complete revolution and the ratchet lock and thepawl carrier are actuated by coming into contact with the other stationary pin,

projection 116.

This action is repeateduntil the tumbler or work has been turned to a completerevolution which is determined by the pin, projection 56 of the ratchet 48.

the completion of the revolution of the shaft 31, moves in a path which is intercepted by the adjustable arm 112 of the stop rod and as soon as the spindle is turned'the stop pin- 56 actuates the arm 112, turns the rod 90 so that it is released from the stationary fin-' ger 108 and is 'thrown backwardly by the spring 109.

The hub 104 is now out of engagement with the arm 103 of the bell crank lever 100 which is thusreleased and the lateral pin 102 is forced into engagement with the collar 59 in a position to engage theslot 60 thereof, as soon as the slot moves into register with the pin. The engagement of the'pin with the slot 60 positively locks the spindle and prevents its continued rotation. Fur.- thermore, the stop rod 90 when released, moves outwardly until its outer extremity is in the path of movement of the outwardly extending branch of the key 87 As soon as the key engages the stop rod it 1s turned in opposition to the spring 88 and releases and replaced by a new blank.

To start the machine: the rod 90 is moved b means of the handle 105 so as to be reset.

- his action releases the clutch key which is This pin in a predetermlned posltion corresponding to immediately set by the spring 88 and since the hub 104 of the release handle has a cam pends upon the shape of the cams, the annular cam 80, for example, being arranged double so that the spindle is advanced and retracted twice in each half revolution.

The design may be altered however, and more cuts made if desired, by modifying the cam and changing the ratchet 61.

Various structural modifications may be effected within the spirit and scope of my invention, and I intend that only such limitations be imposed as are indicated in the appended claims.

What I claim is:

1. A glass grinding machine comprising a grinding wheel, a drivin shaft, a pulley thereon, a clutch for coupling the pulley to the shaft, a spindle, a ratchet and pawl connection between the shaft and the spindle for rotatively advancing the spindle step by,

step, an annular cam on the driving shaft, and a rocking lever actuated by the annular cam to move the spindle toward and from the cutting wheel.

2. A glass grinding machine comprising a grinding wheel, a driving shaft, a pulley thereon, a clutch for coupling the pulley to the shaft, a spindle, a ratchet and pawl connection between the shaft and the spindle for rotatively advancing the spindle step by step, an annular cam on the driving shaft, a rocking lever actuated by the annular cam to'move the spindle toward and from the cutting wheel, a work holder afiixed to the spindle near one end, and means dependent upon the com letion of a predetermined movement of t e work on the work holder to move the spindle toward and from the.

cutting wheel, a work holder comprising ashaft at an angle to the spindle, means de--.

pendent upon the rotation of the work holderabout the spindle axis for advancing the work on said shaft step by step, and means dependent upon the completion of a predetermined rotative movement of the work holder shaft for releasing the clutch bracket secured to the spindle near one end,-

a shaft rotatively mounted in the bracket and extending at ri ht angles. to the axis of the spindle, a ratchet secured to the work holder shaft, a pawl carrier rotatable on said shaft, a pawl on the pawl carrier cooperating with the ratchet and a plurality of relatively stationary projections in the path of the pawl carrier adapted to actuate the pawl and ratchet and rotate the work holder shaft step bystep as the spindle is rotated.

5. A glass grinding machine comprising a rotatable work holder having a work holder shaft at right angles to its axis of rotation, a slidable stop rod, a spring tending to hold the rod in one position, a latch adapted to hold the rod in another position inopposition to the spring, and means dependent upon the rotative adjustment of the work holder shaft for releasing the rod.

6.A glass rinding machine comprising a driving sha a clutch pulley, a clutch releasing key, a spring tending to set the clutch, a stop wrod adapted to' actuate the clutch key in opposition to the spring in one position, means tending to throw the stop rod into said position, a latch for holding the rod in opposition to said means, and means dependent upon the position of the work for releasing the rod.

7. A glass grinding machine comprising a a driving shaft, a clutch pulley, aclutch releasing key, a, spring tending to set the clutch, a stop rod adapted to actuate the clutch key in opposition to the spring in one position, means tending tothrow-the stop rod into said position, a latch for holding the rod in opposition to said means, and means dependent upon the work for rotating the rod, the stop rod being adapted to be released from the latch when rotated.

8. A glass grinding machine comprising a supporting bracket, a spindle rotatably and slidably supported thereby, band for preventing a free rotative movement of the spindle, a ratchet and pawl. for

rotatively actuating the spindle step by step, means for moving the spindle longitudinally forward and back, a work holder secured to the s indle, and means for positively looking t e s indle when released.

9. ,A g ass grinding machine comprising a supporting bracket, a spindle rotatably a brake and slidably supported thereby, a brake band for preventing a free rotative movement of the spindle, a ratchet and pawl for rotatively actuating the spindle step by step, means for moving the spindle longitudinally forward and back, a work holder secured to the spindle, a locking lever for preventing rotation of the spindle, and a stop mechanism adapted to release the locking lever.

10. A glass grinding machine comprising a supporting bracket, a spindle rotatably and slidably supported thereby, a brake band for preventing a free rotative movement of the spindle, a ratchet and pawl for rotativel y actuating the spindle step by step, means for moving the spindle longitudinally forward and back, a work holder secured to the spindle, a locking lever for preventing rotation of the. spindle, a driving clutch, a, stop mechanism adapted to release the clutch, and a locking lever for the spindle adapted to be released when the stop mechanism is actuated. 11. A glass grinding machine comprising a spindle adapted to be rotatively and axially moved, a work holder attached to the spindle, a locking lever for positively preventing rotation of the spindle, a driving clutch, a stop rodadapted to release the clutch in one position, and to retract the locking lever in its opposite position.

12. A glass grinding machine comprising a spindle adapted to be rotatively and axially moved, a Work holder attached to the spindle, a locking lever for positively pre- .100 venting rotation of the spindle. a driving clutch, a stop rod adapted to release the clutch in one position and to retract the locking lever in its opposite position, and means dependent upon the work holder for 105 releasing the stop.

13. A glass grinding machine comprising a spindle adapted to' be rotatively and axially moved, a work holder attached to the spindle, a locking lever for positively pre- 110 venting rotation of the spindle, a driving clutch having a laterally extending release key, a spring tending to set the clutch, a stop rod adapted to engage the key and release the clutch in one position, a spring 115 tending to hold the rod in said position, a latch adapted to hold the rod in a retracted position, a cam on the rod adapted to'release the locking lever in the retracted position of the stop rod, and means dependent 120 upon the work holder for releasing the stop rod.

the stop rod, a, laterally extending arm on.

the stop rod, and an actuating pin on the Work holder adapted to engage the arm and release the stop rod when the work occupies a predetermined position on the holder.

15. A glass grinding machine comprlsing a grinding wheel, and a fixed rigid and nonyielding stop extending close to the cutting edge of the wheel and adapted to determine the de th of the cut.

-' 16. glass grinding machine comprising a cutting wheel, a support on which the wheel is mounted, a pair of rigid non-yielding stop -members secured to the support and extending close to the cutting edge of the Wheel.

17. A glass grinding machine comprising a cutting wheel, a support on which the wheel is mounted, a pair of rigid non-yielding stop members secured to the support and extendlng close to the cuttingedge of the ished in a single plane to determine the depth of the cut. f

In. witness whereof, I have hereunto set my hand this thirteenth day of June, 1919.

' EDWARD A. RYON.

,wheel and having their outer surfaces fin-