US1531281A

US1531281A - Machine for grinding the ends of arbors for the balance wheels of clocks or similar articles

Info

Publication number: US1531281A
Application number: US629006A
Authority: US
Inventors: Jules F Garbin
Original assignee: WILLIAM L GILBERT CLOCK COMPAN
Current assignee: WILLIAM L GILBERT CLOCK Co; WILLIAM L GILBERT CLOCK COMPAN
Priority date: 1923-03-31
Filing date: 1923-03-31
Publication date: 1925-03-31
Anticipated expiration: 1942-03-31

Description

'Mch 31. 1925.

MACHINE FOR GRINDING THE ENDS oF ARBoRs .FCR .THE BALANCE vlli'ivrh's gg CLOCKS 0R SIMILARv ARTICLES r A Filed March 31, 1925 V 4 Sheets-Sheet 1-.

IIIHIII'/ "HWI MI HI Il' munnunmn 1w' MINI, NIH llf" March 31, 1925.

1,531,281 waans 'CF J. F7, vGARBIN MACHINE Fon GRINDING THE Enns oF AnBoRs Fon THE: BALANCE CLOCKS 0R SIMILAR ARTICLES Filed Ilarch 31, 1923 4 SheetslSheet 2 STW ' 'Marh 31'. 1925.

1,531,211.: GARBIN ARBORS FOR THE BALANCE WHEELS' 0F IMU-AR ARTICLES J. F. MACHINE FOR GRINDING THE ENDS OF CLOCKS OR S Filed March 31, 1925 gy W .Wi/W

Patented Mari. 31, 1925. y l l UNITED, STATES JULES F. GARIBIN. OF `WIINS'IED, CONNECTICUT, ASSIGNOR TO WILLIAM L. GILBERT` PATENT loFFici-z;

' CLOCK COMPANY,4 OF WINSTED, CONNECTICUT, A CORPORATION OF CONNECTICUT.

MACHINE non. GRINDING THE ENDS OF ARBORS FOR'THE BALANCE WHEELS 0F CLOCKS OR SIMILAR ARTICLES.

Application led March 31, 1923. Serial No. 629,608.

,To all whom t may conorn:

Be it known that I, JULES F. GARBIN, acitizen of the United States, residing at Winsted, county of Litchfield,.State of Connecticut, have invented a certain new and useful Improvement in Machines for Grinding the Ends 'of Arbors for the Balance Wheels of Clocks or Similar Articles, of which the following is a full, clear, and exact description.

My invention relates Vto machines for grinding arbors for the balance wheels of clocks or similar articles, and has for its object to provide amachine of this character which is simple in construction and highly eiiicient in operation.

'The following isa description of my invention reference being had to the accompanying drawings, in which,-.

Figure 1 is a view in perspectiveof a p0rtion of a machine embodylng the features of the invention in their preferred form;

. Fig. 2 is a sectional plan view of the same taken substantially on the line 2-2 of Fig. 3; Y

Fig. 3 is a sectional view, on an enlarged scale, taken on the line 3 3 of Fig. 2;

Fig. 4 is a side elevation, partly in secl tion and with parts broken away, of the machine; and

Fig. 5 is a detail sectional view, on an en-Y largcdscale, taken on the line 5-5 of Fig. 4.

The machine illustrated in the drawings is particularly adapted for use in grinding the ends of arbors `for the balance wheels of-clocks, kthe ends of the arbors. bein previously pointed and hardened. As own,

the machine is provided with a magazine 2,

a ycarrier wheel 4 `for7feeding theA arhors from the magazine 'and discharging them through an aperture 6 in a base plate 8 of the' machine frame and. grinding

wheels

10 and 12 for operating on the ends ofthe arhors, respectively, as thearbors are being carried by the carrier wheel. The axes of the

wheels

10 and 12 are respectively above. and below the horizontal plane passing through the axis of the carrier. The magat zine 2 is secured on a bracket 13 on the base plate 8 and comprises a hopper having an upwardly and rearwardly inclined bottom wall 14 and vert-ical sides 16. The carrier wheel is carried hy a shaft 18 which extends through and is` journaled in bearings in plate-8. The carrier wheel 4 is provided with a series of transversely extending semi-cylindrlcal recesses 34 in its periphera surface, the'rccesses being of suitable size to receive the arbors from the magazine during the rotation of the carrier wheel.

The

grinding wheels

10 and 12 preferably of emery are mounted on the inner ends of shafts 36 which are journaledin bearings in blocks 38 mounted on the 'base plate 8. The shafts 36 are eachfdriven through a pulley 40 secured on its shaft between the Shaft bearings on the block 38. The axes of the polishing or rinding wheels'lO and 12 are arranged at .t e proper angle with relation to the .axis of the carrier wheel 4 to bring their peripheral surfaces in position to effectively act on the ends of the arbors, and the axis of the polishin wheel 10 is spaced a distance a ve the plane of the airis of the carrier wheel 4, and the or grinding axis of the grinding wheel 12 is spaced a "distance below the plane of the axis of the carrier wheel so that the arbors arerst acted upon by the grinding wheel lO and then after passing t e plane of the axis of the carrier wheel 4 are acted upon by theA grinding wheel 1,2. The machine is further provided with means for spinning the arbors in the recesses while they are being acted'upon by`the grinding wheels and for positioning the arbors in the recesses as they grinding wheels act to spin the arbors in the' recesses againstthe action thereon oflthe grinding wheels, the belt being driven at .horizontal plane of the axis of the carrierwheel. The pulley 44 is carried by a shaft 48 which extends through and is journaled in bracket arms 50 mounted on the machine base plate 8, the shaft being driven through a belt and pulley 52 carried thereby. The

pulley 46 is loosely mounted on a stud 54 secured on the free end of an arm 56 pivotally mounted on a pin 58 secured in a hanger 60 on theunder side of the base plate 8. The arm 56 is urged `downwardly to place the desired tension on the belt 42 by means of a coiled spring 62 having one end secured to the free end of the arm 56 and its other end secured to a depending post 64 on the under side of the base plate 8.

The

belt pulleys

44 and 46 are so positioned with relation to each other that the belt is inclined slightly with relation to the plane of rotation of the carrier wheel so that the belt as it is being driven tends to shift the arbors engaged thereby axially toend ward the left, viewing Fig. 5. As the arbors are carried into position to be engaged by the belt, however, their left-hand ends are brought into engagement with the free portion of a spring arm 66 which is secure by a screw 68 to a guide plate 70 hereinafter described. As the ends of the arbors ride over the spring arm 66 they are shifted by the arm toward the right until their ri ght-hand ends are brought into engagementwith a guide plate 72 hereinafter described, this shifting movement of the arbors being effected against the action of the belt 42. While the right-hand ends of the arbors are in engagement with the guide plate 72 they are carried by the carrier wheel into engagement with the peripheral surface of the grinding wheel 10 at a little distance above its center. Upon engagement with the inding wheel, the curved end of the spring arm 66 permits them to be shifted by the belt 42 toward the left across the peripheral surface of the grinding wheel 10 and this shifting movement of thel arbors toward the left continues as they approach the plane of the axis of the carrier wheel, the ends of the arbors leaving the grinding wheel when the arbors are near the -plane of the axes of the carrier.. wheel and grinding'wheel 10. This -completes the grinding operation on the right-hand ends of the arbors. As the arbors pass the free end of the spring arm 66 at about the plane of the axis of the carrier wheel their' shifting movement toward the left by the action of the belt 42 continues so as to first bring the left-hand endsof the arbors in contact with the inner portion of the peripheral surface of the grindingv Wheel 12 near the plane common to its axis and the axis of the carrier wheel and then to shift the arbor ends across the peripheral surface of the grinding wheel 12 until their left-hand ends are Ibrought into engagement with the guide plate which prevents further shifting movement of the arbors by the action of the belt 42 and thus positively determines the extent of the grinding action on the lefthand end of the arbors.

The axial movements of the arbors are thus effected by the guide arm 66 and the belt 42 and in the embodiment shown the movement during both grinding actions is all due to the belt and in one direction, this being preferable. After each arbor passes the grinding wheels 12 it is carried by the carrier wheel to a position directly above the aperture 6 through which it is permitted t0 drop into a receptacle located beneath the machine, a spring plate 74 being suitably arranged to engage the arbors after they reach a position above the aperture 6 to insure their discharge from the carrier wheel. As shown the plates 70 and 7 2 are arranged substantially in alinement with the inner faces of the vertical sides of the magazine.

2 and the forward portions' of the plates are cut away at 76 so as to closely surround threaded through central apertures in saidprojections with their ends abutting said bracket arms. Byadjusting the screws 8O and 82 the

guide plates

70 and 72 may be adjusted as desired toward and from the peripheral surfaces of the

grinding wheels

10 and 12.

To insure the arbors being properly maintained in the recesses in the carrier wheel as they are being operated upon, a pair of guide plates 84 are provided having their rear edges curved so as to follow the contour 1 of the peripheral surface of the carrier wheel and to almost engage the cylindrical surfaces of the arbors adjacent to opposite edges of the friction belt 42. The guide 'plates 84 are secured by a bolt 86 to a block 88 mounted on the base plate 8.

From the foregoing it will be apparent that the machine operates entirely automatically to feed the arbors from the magazine and into position to be opcratedupon by the grinding wheels and, after being operated upon bythe grinding wheels to discharge them from the machine. Also that the arrangement of the grinding wheels and the devices for presenting the arbors to the lll) action of the grinding wheels is such as to insure the ends of the arbors being ground rapidly and with a uniform degree of accuracy.

The blocks 38 on which the grinding wheel shafts are mounted are Vadapted to be adjusted to adjust the position of the grinding wheels at right angles to their axes to corn-- wheel carrying blocks 38v are adsjustably mounted on the'base plate 8 by means of guide bars 90 secured on the base plate and received in longitudinally extending grooves in the blocks 38. An adjusting screw 92 eX- tends through an elongated slaot 94 in each block 38 and is screw-threaded into the bar 90, and an adjusting screw 96 is screwthreaded into the forward end of each block and is held from axial movement by collars 98 thereon arranged at opposite sides of a stop member 100 secured to the base plate 8, the adjusting screw 96 extending through a slot in the member 100 so that by loosening the screw 92 land adjusting the screw 96 each block 38 may be adjusted as desired. i

In operation the carrier is preferably driven so as to revolve at the rate of about two revolutions per minute while the belt 42 is driven so as to rotate the arbors on their axes at about 3000 revolutions per minute, and the

grinding wheels

10 and 12 are driven at the rate of 10,000 revolutions r minute.

As will be evident to those Vskilled ink thev art, my invention permits of various modi lar articles having tapered ends having, in

combination, a magazine, means comprising a rotating carrier wheel for feeding articles having tapered ends from the magazine with the ends of the rarticles projecting beyond the sides of the wheel, and means for rinding rst one and 'then the other oft e tapered ends of the articles as they are being thus fed.

2. A machine for grinding the ends of arbors for the balance wheels of clocks or similar articles having tapered ends having, in combination, a magazine, means comprising a rotating carrier wheel for feeding articles having tapered ends from the' magazine with the ends of the articles projecting be ond the sides of the wheel, means for shifting the articles axially first in one direction and then the other on the carrier wheel, anda pair of rotating grinding wheels constructed and arranged to grind the tapered ends of each article during said shifting movements thereof, respectively.

3. A machine for grinding the ends of arbors 'for the balance wheels of clocks er similar articles having tapered ends havin, in combination, a rotating carrierv wheel having recesses in its peripheral surface for receiving articles having tapered ends with the ends of the articles projecting beyond 1 the sides of the wheel, and means for grinding the tapered ends of the articles comprising a pair of rotating grinding wheels, means cooperating with said carrier wheel to axially shift each article in its recess in one direction, and a traveling belt passing over a portion of the peripheral surface of said wheel in a plane inclined to the axis of rotation ofsaid wheel so as to rotate said articles in said recesses, and impart an endwise thrust thereto in the other direction so` that the ends of said article are successively presented to the action of. said grinding wheels, respectively.

4. A machine for -griiiding the ends of.

arbors for the balance wheels of clocks oi' similar articles having tapered ends having, in combination, a rotating carrier wheel having recesses in its peripheral surface for receiving articles with the tapered ends of the articles projecting beyond the sides of the wheel, and means for grind-` ing the ends of the articles comprising a pair of rotating ygrinding wheels, and means for shifting said articles axially in one direction so as to present the end of each of -them as they are being fed to one'of said grinding wheels, and a traveling belt passing over a portion of the peripheral surface of said wheel in the same direction as the direction of rotation of said wheel but at a greater speed vso as to rotate said articles .in said recesses, the direction of travel of said belt being at an acute angle to the plane of rotation of said wheel so as t0 shift said articles axially in the other direction after being-presented to said first grinding wheel, to present its opposite end to the other grinding wheel.

5. A machine for grinding the eiidsof arbors for the balance wheels of clocks or similar articles having tapered ends having, iii combination, a rotating carrier wheel hav- 'ing recesses in its peripheral surface for surface of said wheel in the same direction as'the direction of rotation of said wheel but at a greater speed so as to rotate said articles in said recesses, the direction ot' travel of said belt being atan acute angle shifted by said belt.

6. A machine for grinding the ends of arbors for the balance Wheels of clocks or similar articles having tapered ends having, in combination, a pair of rotating grinding Wheels spaced apart and means for feeding a plurality of articles and successively presenting the ends of each of them to the action of the grinding Wheels, respectively.

7. A machine for grinding the ends of arbors for the balance Wheels of clocks or similar articles having tapered ends having, in combination, a rotating carrier Wheel having recesses in its peripheral surface for receiving the articles with one end of each article projecting beyond the side of the wheel, a traveling belt passing over a portion of the peripheral surface of said Wheel, means to move said belt relatively to said carrier Wheel so as to rotate said articles in said recesses, a rotating grinding Wheel constructed and arranged to act on said projecting end of each article as it is being rotated in its recess, and means for moving the articles longitudinally in their recesses as they are being acted upon by the grinding wheel.

8. A machine for grinding the ends of arbors for the balance Wheels of clocks or similar articles having tapered ends having, in combination, a rotating carrier Wheelhaving recesses in its peripheral surface for receiving the articles withv one end of each article projecting beyond the side of the wheel, a rotating grinding Wheel constructed and arranged so as to cause its peripheral surface to act on said projecting end of each article as the article is being carried by the wheel, for rotating said article in" its recess and for moving said article and said grinding wheel axially with relation to each other as the article is being acted upon by the Wheel.

9. A machine for grinding the ends of arbors for the balance wheels of clocks or similar articles having tapered ends having, in combination, a rotating carrier Wheel having recesses in its peripheral surface for receiving the articles with the ends of the articles projecting beyond the sides of the wheel, means for shifting each article axially first in one direction and then the other, and for rotating the articles in the recesses, and a pair of rotating grinding Wheels for acting successively on the ends of the articles during their shifting movement in one of said directions.

10. A machine for grinding the ends of arbors for the balance wheels of clocks or similar' articles having tapered ends havof said Wheel so as to tend to shift said articles axially in one direction, a` guiding member comprising a spring arm arranged to be engaged by one end of said articles to shift the articles in the opposite direction against the action of said belt and to permit the shifting action of said belt to be .effective to shift the ,articles in said first mentioned direction as their ends approach and ride olf of the free end of said spring arm, and a pair of rotating grinding wheels constructed and arranged to act successively on the ends of the articles While the articles are vbeing shifted by the belt.

1]. A machine for grinding the ends of arbors for the balance wheels of clocks 0r similar articles having tapered ends having, in combination, a rotating carrier wheel having recesses in its. peripheral surface for receiving the articles with the ends ofthe articles projectingbeyond the sides of the Wheel, a traveling belt passing over a portion of the peripheral surface of said Wheel in the same direction as the direction of rotation of said wheel but at a greater speed so as to rotate said articles in said recesses, the direction of travel of said belt being at an acute angle to the plane of rotation of said Wheel so as to tend to shift said articles axially in one direction, means for' shifting said articles axially in the opposite direction to a predetermined position and then to permit the shifting action of said belt to be effective to shift said articles in said first-mentioned direction, guiding members arranged to be engaged by the ends of the articles to positively limit their shifting movements in either direction, respec` Y about the axis of the wheel and then discharging them from the machine, a belt passing over a portion of the peripheral surface of the carrier wheel, in the same direction as the direction of vrotation of said 4 clined at an acute angle to the carrier wheel but at a greater s d and inane of rotation of the wheelso as to ten to shift the articles axially in one direction in the recesses, means including a spring for tensioning the belt, means for shifting each article axially in the opposite direction to a predetermined position and then permitting the belt to shift the article in said first mentioned direction, and a pair of grinding wheels constructed and arranged to act successively on the ends of each article While the article is being lshifted by the belt.

`13. A machine for grinding the ends' of arbors forl the balance wheels of clocks or similar articles having tapered ends having, in combination, a rotating carrier wheel having recesses in its peripheral'surface for receiving articles having tapered ends With the ends of the articles projecting beyondf the sides of the wheel,means for grinding one ofthe ends of the articles comprising `a grinding wheel, and means comprising a traveling belt passing over a portion of the peripheral surface of said wheel, and in a plane inclined to the axis ofrotation of said Wheel for moving the article longitudinally during the grinding operation.

14. Mechanism for feeding arbors for the balance wheels ofclocks or similar articles having, in combination, a rotating carrier wheel having transverse recesses in its 'peripheral surface for receiving the artic es, and means comprising a traveling belt passing over a portionof the peripheral surface of said wheel and in va plane inclined to the axis of rotation of said wheel for moving the articles longitudinally in their' JULES F. GARBN.