US1578370A - Machine control - Google Patents

Description

Mai-ch 53 1926.-'- 15.578320 F. N; Ross.

MACHINE CONTROL 'Filed April 26, 1923 I 3 sheetsgs ee't 1 March 30,1926. I 1,578,370 7 F. N. ROSS MACHINE CONTROL Fild April 26, 1923 3 Sheets-Sheet -:s

Patented Mar;

=1 ;UN1 D s T TES P ATE F I E -E FREDERICK N. ROSS, or ronrmo, MICHIGAN, ASSIGNOR, BY MEsNE assirenivrnnrrs} To- THE ra'rnn'rsutrron COMPANY, A QQEPORATION 0F ooN'n omc r.

ACHINE conrnonf Application" area 'Apri1 26,

To'all whom it may concern Be it known that Fnnnnnron N. Ross, a

citizen of the United States, residing at Pon tiac, in the county of Oakland and State of Michigamhas invented certainfnew and useful Improvements in Machine Controls, of which the following is a specification.

This invention relates to machine controls and more particularly to a power control Another object is to construct the control mechanism so as to'enable the clutch tripping mechanism to be automatically reset, and" positioned in readiness to repeat the clutch tripping. operation when actuated.

In the drawings: 7 IF ig. 1; is. a sideQelevation' partly in' sec.-

'tion, Ofa'machine with my clutch and tripping mechanism attached thereto.

Fig. leis a detail of the rock arm.

Fig. 2 is a view similar to Fig-1 showing the electrical circuit closed, but with the clutch parts disengaged.

Fig. 3 is a similar view showing the electrical circuit closed v and the J clutch parts in engagement.

Figat is a vertical sectional view taken through the clutch parts. i v

Fig. 5 is a section on the line 5'-5 of Fig.

4, showing the spring for causing the clutch partsto first engage.

Fig. 6 IS a view similar to Fig. 5, showing thev spring expanded to engage. thev clutch parts. I

Fig. 7 is a section. on the line 7'7 of Fig.- 4.

Fig.8 is a detail of the driven member.

. This machine control is shown in'my prior Patent No. 1,508,253, issued Sept. 9, 1924;, applied to a button attaching machine, but ohviously this control mechanism could be applied to any machine where it is desired to have the moving parts rotate through one revolution, and to have the clutch automat ically disengage and stop the said moving parts.

I designate a machine as A, which is provided with a shaft 1) that can be suitably connected to the operating mechanism of the machine. The shaft 7) will he referred to as the driven member.

1923: Serial m; e34,711."

orgeared directly 'to a motor o-r as I a shown in Fig. 4. The driving. member '0" is provided with a pulleywheel d,keyed'there motor M, is provided with a switching mech- The driving member 0 may be connected 7 anism 7, which consists of a button 9 which i's'adapted tobe pushed in to close the con:

tacts hjthereby closing the circuit. and star't mg a motor which will continuously drive Referring to Figs. land' will be seen that the switch actuating lever pivoted 'on the stud k to the machine support a. The

the driving member 0 until such time as 1 the contacts hare opened.

buttong is of the usual construction'and contains. a spring for normally pressing the button outwardly fto, open the contacts h. 'As'sho wn in Fig; 1 the switchis 1 p Pivoted to the machine support a as-at L, is a rock armjo'whiclrcarries a roller '29, that 'is adapted to engagewiththe cam face 9 carried by the switch actuating lever Roller 12 is journalled on the pin gr carried by the said rock arm 0, and a rod 8 connects the pin 1' with the compound foot lever 25, hereinafter to be described. I v

The compound foot lever (Fig. 1 is hinged to a support it as at o, the saidsupport u being supported by the cross member w carried by the legs of the table The compound foot lever consists of twov pedals 1- and'2, each hinged at v, and coupled'together by the bolt' 3' and nut eh ,The draft rod 8 is secured only to the pedal 1 and a spr ng f5, having one end secured to the :draftfl-rod s by a collar 6, and the other end secured to the table, tends to hold the pedals, f, rodand rock'arm in theposition as shown in Fig.-l.f The operator presses the heel of his 'foot down on the foot- .lever 2," as, at 7, which becauseof the bolt and nutconnection '3 and t, causes'thepedal ,1 and draft rod 8 to move downwardly part way. This causes the rock, arm 0 to be pulled down, causing the roller p to bear on the cam face q of the switch actuating lever'e, causing the same to assume the position as shown inthe full line position in Fig. 2. The cam surface 8, 1( see Fig. T 2) follows the are of a f. circle having its center at n where the rock-arm 01s pivoted, so that a further movement of 1 H0 the rock'arm and roller, by pressing the j.

. lever 1 down withthetoe, will not afieet the switch actuating lever i, but onlyprevents the. switch from being opened.

The driving member is provided with an enlarged portion 9 which is counter-bored as at 10'; the shait b, or what is termed the driven member, is provided with-a flange portion 11, near its outer end and a stud portion" 12, which is adapted to enter with-- inthe counterbored portion 10 oi the driv i fg member :Fitted r'o Stud tion" 12, is a roller retaining ring 13, which is p shouldered, as 14. .The reduced portion 1 surrounds part of the stud portion12oi' p the driven member.

20fis contained flwithinthis counterbored. port1on,hav1ngone end abutting a pin 21,

, is flattened as atthe locations 18. rollers 17'which are supported'in the roller the driven member and is adapted tofit. within thecounterbored portion 10 of the driving member. The reduced endofithe roller retaining ring is provided with a plurality of holes 16, in. which rollers 1' 7, are looselyfitted.

The stud portion 12 of the driven member retaining ring as described, arefadap'ted to engage. with these flattened portions 18 of I The roller retaining ring 13 iscounterbored as at 19, and a spring carriediby the flange 11 of the driven mem;

ber, andtheother', end of the spring abut ting a pin 22, carriedfby the roller retaining ring 13. The roller retaining "ring '13 is 7 adapted to abut "the flange 1150f the driven member and the, end of the enlarged portion '9 ofthe driving member is arrangedtoabut the shoulderlt of the roller retaining ring 13 V taining ring 13 having a shoulder 24:, which is'adaptedto be engaged by the shoulder 25 of the finger 26, the said finger being pivoted on the stud 7%.; [Finger 2? pivoted on the stud his adapted'to engage inthe notch 28 earned by the flange 11 of the dr1venmem-Q- her, and a spring 29 hasone'en'dsecured to the finger 27 and the other'end secured to the pin 30 carried by thefinge'r 26.}1- '1his spring 29 forces the finger27 into the notchw28, and-' also tends to k861i the finger 26 hearing against the outer circumferential surface of the'roller retaining r1ng'13,thus

tending to keep the 's'houlder'25 or" the. finger 26, in engagement with the shoulderl24c, car ried by the roller retaining ring. I

In Fig.3, 1 show-the positionassu'med by the tripping mechanism when the toe of the operators foot presses down on the pedal 1, as at 31. (Fig. 1.) This will cause the draft rod 8 and rock arm 0 to move downwardly to complete thestroke, the roller 79' riding upon the cam surface 8 Pivoted at 32 to the rock arm 0, is; a trip lever 33', which is'provided with a shoulder 34:, adapted to engage the shoulder 35, carriedby the The said A tooth"23 is provided on the roller re- 1 rollers 17 arecaused to retreat backwardly finger 26. A springc 37 has one end secured to the extension 38 of the tripping 'lever,;and

the other end secured to the rock arm 0 as p at 39,.whmh wi'll tend to holdtheshoulder 3 1 of the tripping lever in engagementwith said shoulder 35 carried by finger 26. ."Upon pulling the draft rod 8 secured to the rock arm o downwardly to complete the stroke, the trip 33 rocks the finger'26 downwardly, and disengages the shoulder 25' of the finger 26 from the shoulder 24, carried by the roll er retaining ring-13. I Y v V; When the shoulders 2st and aredisen gaged, the spring 20 @which is compressed and bears upon the pins 21 and 22', 'will force the retaining ring 13in a clockwise moveinent as indicated by the arrow in Fig.1'6. 1

As'the pin 21 .i's carried byth'e flange'll,

the finger'27 which engages in theInotch 28 carried 7 by' flange 11, prevents'the spring l I 20 from forcing the'pin 21 in a counter. clockwise movement, and as a' result; the only way the spr ng oa'n- -e2 pand is by pushing the retaining ring 13' in a clock, a

wise inoveinenh 'As shown 'inQFig. 3,

the moving of the-retaining ring 13' which loosely supports the rollers17 will cause the said rollers to ride on theiiattene'd cam surfaces 18 until'the rollers [engage the rotating driving member 0. The driven member is thus caused to rotate with the driving mem- The tripping lever 33 is depressed a rient distance so-that the shoulder 35g'carried by thefinger 26, willslip byv the shoul-- der 3 1 of the tripping lever, the finger 26 c then returning to bear against the -circ.um erential surface of the: retaining ring 13.

On releasing the foot pedal "1, the spring "again engages the-shoulder 25, carried by the;

finger 26. When these shouldersiengage, the retaining ring 13 will stop and the drivg en member?) will continue to rotate due to the momentum of. the machine, whereby the on the flattened camsurfaces 18, the said 'rollers thereby becoming disengaged from the driving member 0, which will cause the driven member 6 to also stop, thus stopping the machine mechanism to which the driven member is connected. 3

The relative movementbetween the roller retaining ring 13 and the driven member 5 will cause the spring 20 to be compressed due to the fact that the said spring is interposed between the pin 21 carried by the flange 11 of the driven member I), and the pin carried by the roller retaining ringlifi. The

finger 27 is timed to drop into 'the'notch 28 carriedby the flange 11 to prevent the reverse turning movement and to hold the spring under restraint. The potential energythei'eby stored in the spring is sulficient to actuate the roller retaining'ring 13 to engage the driving and driven members as described when the shoulders 2% and .25 are disengaged asthe operator presses the toe of his foot on the pedal l to. actuate the tripping mechanism. M When the operator leaves his position in front of the machine, hemust obviously re 'move his foot entirely away fromthe pedals,

thus releasing pedal 2, which he has held down'with the heel of his foot. The spring 5 causes draft rods and rock arm 0 to re turn to the position as shown in Fig. 1,

thereby allowing the spring pressed switch button 9 "to push outwardly, opening the contacts h, the electrical circuit to'the source or" power being thereby disconnected.

It is not possible to trip the machine without firstthrow-ing in the switch to start the motor which drives the driving member It will be thus seen that the operator can keep the'driving member 0 continuously rotating, by keeping his heel on the lever 2, and can trip the tripping mechanism at will by pressing downwardly on the pedal 1 with the toe of his foot.

The mechanism as described will positive ly stop the driven member at the completion,

of one revolution and even though the oper ator should keep the toe o1 his foot pressed down upon the pedal 1, the machine will stop because the tripping lever 33 is de pressed downwardly a sufiicient distance so that the shoulders 34 and 85 slip by each other allowing the finger 26 to bear upon.

member as is usual in clutches. l-Iowever,

the driven member is made up of two members, to wit: the retaining ring 13,.and the flange 11. These two members have relative movement which serves to throw in the gripping members, to wit: the rollers; or disengage these gripping members. This relative movement is secured by the interposition of a motor element between them, to

wit: the spring motor 20. Potential energy is stored in this spring motor at the end of each revolution of the clutch parts by reason of the momentum of the parts overthrowing said parts after the ring-13 has the finger 26. This momentum overthrows the flange ll'and pin 21, compressing the spring 20'. When in this compressed position before the compressionot the spring can cause a reverse turning movement, the fink been stopped by the tooth 23engaging with 'ger 27 drops into the notch 28 and holds '2 the two relatively movable driven parts under stress from'the spring20. Hence as already. explained, when the operation of thetoe of the-foot removesthe stop finger 26, the spring20-will cause relativemove.

ment between the two Idriven clutch parts thereby coupling the driven clutch parts f with the driving clutch member.

lVhat I claim is:

1. In a power control,'the combination of a source of power, driven. mechanism, a

clutch between the driven mechanism and 1 the source of power and provided with a stop shoulder, a pivoted clutch finger yieldingly held in engagement with said stop shoulder, and r a tripping mechanism including a tripfingeryieldingly held in engagement with said clutch finger whereby movementof said trippin'g mechanism serves to actuate the.

trip finger for retracting the clutch finger and disengaging the same, from the stop shoulder for the purpose'qof releasing the clutch, said trip fingerarranged to rotate about .a center remote from the pivot of said clutch finger, said trip. and clutchfin- *gers separating in diverging paths when moved, whereby the trip finger disengages from the clutch finger with the releasing ot' the clutch to allowthe clutch finger to again.

position itself so as to engagethe stop shoulder to throw out the'clutch at the. completion of one revolution. Y I

2. Ina power control, the combination of a source of power, driven mechanism, a

clutch between the driven mechanism and the source. of power and provided witha stop shoulder, a pivoted spring pressed clutch finger engaging said stop shoulder a mov: able arm pivot-ed on the opposite side of said stop shoulder and provided with a trip finger pivoted'the'reto, said trip finger Iengagin'g with the clutch finger, and a draft rod connected to said 'arm,whereby when the draft rod is actuated the arm ancltrip finger are moved, the said trip finger actullO ating the clutch finger to move the same,

said trip and clutch fingers separating in diverging paths when moved to release'the clutch and to simultaneously disengage the trip finger from the clutch finger for permitting the clutch finger to again engage the stop shoulder upon one revolution of the clutch parts for the purpose of throwing out the clutch to disengage the source of power from the driven mechanism.

Iii testimony whereof he has aflixed his signature.

lit)

FREDERICK N. Ross.

Certificate of Correction.

It is hereby certified that Letters Patent No. 1,578,370, granted March 30, 1926, upon the application of Frederick N. Ross, of Pontiac, Michigan, for an improvement in Machine Controls, were erroneously issued to The Patent Button'Company, Whereas said Letters Patent should have been issued to The Button Attaching Machine 00., a Corporation of Uonnectiout, said corporation being assignee, by mesne assignments, of the entire interest in. said invention, as shown by the records of assignments in this office; and that the said Letters Patent should be read With this correction therein that the same may conform to the record of the case in the Patent Office.

Signed and sealed this 1st day of June, A. D. 1926.

[SEAL] M. J. MOORE, Acting Commissioner of Patents.

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