US1706901A - Driving mechanism - Google Patents

Description

Mlch, 235,192.9.. E. B. ROBY 1,706,901

DRIVING MECHANISM Fired sept. 4, 19.26

5 Sheets-Sheet l` l EDWARD B.. ROBY.

BY mw A TTORNE Y IN VEN TOR Marc-|126, 1929. E. B.' may 1,106,991;

DRIVING 'MEGHANI SM Filed sept.4, 1926 s sheets-sheet 2 f INVENTOR EDWARD B. ROBY.

E. B. ROBY 1,706,901

DRIVING MECHANISM Filed sept. 4, 1926 5 Sheets-Sheet 3 a IIIA INVENTOI? EDWARD B. ROBY A TTORIVEY Patented Mar. 26, V1929.

UNITED STATES PATENT OFFICE.

EDWARDS. ROBY, OF TROY, NEW YORK, ASSIGNOR TO S. AND FOLDNG MACHINE COMPANY, ING., OF `(It-BEEN ISLAND, NEWJYORK; A GORPORATIONOF NEW YORK.

nRivING MncHANisM;

Application filed September 4, 1926. Serial No. 133,544. i

The present invention broadly relates to a driving mechanism adapted .to impart an 0s.- cillating or rotating motion toa lever ora crank and in particularit relates to a mechanism of the type shown in my prior applica-V tion, Serial No. 53,246, tiled August 29, 1925, in which the motion of the lever or crank, is controlled by manipulations of a foot lever.

The invention deals with a driving mechanism for machines, which includes two rotate ing members continuously powei driven in opposite directions, to which rotating members a lever or crank is adapted to be opera7 tively connected or disconnected by manipulations of a footlever under the control of the operator of the machine. iJVlien the lever or cranli is operatively connected withone of the said rotating members it is caused tobe rotated Vin one direction, and when it is opera tively connected with the other of said rotating members it is caused toberotated in the opposite direction.

The object of the present invent-ion is to simplify and render more eifective the meclianism. Briefly stated, the present invention consists in the employment of a different, more simple and effective means for engaging the lever or the crank to the oppositely rotating members, whichvserve to drive it.

The invention will be more fully understood from a considerationof the following description of the accompanying drawing forming a part-of this speciiicationand'in which Figure 1 shows in side elevation a part of. a machine provided with the driving:mecha` nism of the invention. i

Figure 2 isa plan sectional view through the center of the driving mechanism.

Figure 3 is anenlarged elevationalvieiv partly in vsection of the driving mechanism, f

Figure 4 is an enlarged view in elevation illustrating the means for operatively eli-- orY disengaging the lever or c- 'ank tov be operated to the eppositely rotating meni- Figures 7., 8 and 9 are viewsv similar toy Figure 4, but showing the `engaging means in differentposition.

rlnd Figure 10 is a` sectional view von the line 10e-10. of Fignre.. i i

Referring now to the drawings iii which like reference numerals indicate like parts throughout the various views, the numeral, 10, indicates the frame of a machineequipped with the driving mechanism of the present invention. Motion is communicated to the op-` erating elements of the machine through a member, 11, in the nature of a connecting rod. This member is adapted to impart reciprocatingmotion to a piston 11a to which it iscon-` iiectcdiby a pivot shaft 1lb, the piston being mounted for movement on a vertical rod, 12,V mounted in the frame of the machine and is also adapted to impart rocking motion to other parts of the machine (not shown). The

member, 11, is pivoted to a lever, 13, at 14,

and is actuated by said lever. The lever, 13, is mounted on a shaft, 15, which extends horilzontally through the machine and has a bearing 13 which` also serves as a support for rod 12, as shown in Figure 1. A lever, 16,` is also pivoted to the lower part of the frame of the machine at 17 and has a foot piece, 1S,`

for the operator of the machine. When the foot of the operator is taken off the foot piece, the lever, 13, assumes the vertical position shown in Figure 1, Vbut when the operator of the machine depresses the foot piece, 18, the lever, ,13, cis rotated counter-clockwise, as seen in Figure 1, through anangle of 180 and to a position diametrically opposite to i that shown in Figure 1; As long as the operator of ,the machine keeps depressed the footfpiece 18,1t-he lever, 13 stays in thisfpcsitiombut as soonas he lets upon the foot piece, the lever,

13, swings back. through the same angle to its-origiiial positionsliown in Figure 1. The means whereby the above motion of the lever, 13, is obtained forms the subject,` matter of thepresent invention. y. i

Mounted on the shaft, 15, are two oppositely rotating members shown in the form of an crdinarygear, 19, and an aunulargear, 20, which are arranged coneeiitrically and spaced apart. These gears are continuouslyrotated at a uniform speed in opposite directions as by means of; a small-pinion, 21, disposed be on the shaft, 15, is a crank armf25, havingan elongated bearing, A26, encirclingasaid shaft. The leiier, `13, isfrigidly securedto the `crank i arm,25, sovthat rotationof the latter produces` rotation of the former. The lever' 13 and arm i are preferably of unitary construction and the two'in fact form abell-crank lever pivoted on shaft 15. The crank arm is adapted to be operatively connected with either the gear, 19, or the gear, 20,sothat it `may be oscillatedback and forth' thereby to cause oseilla' tions ot the lever, 13.v The means wherebyv the crank arm is operatively connected to one or the other of the gears whentlie operator of the 'machine manipulates the foot lever, 16,

' is= the main novel .feature of the present invention over `that shown in my prior application, Serial No. 53,246, tiled August 29, 1925, referred to above. n v l .Y

In orderto operatively connect the Vcrank arm, 25, to-the'gear, 19,011 to the gear, 20, I

remploy an'e'sca'pement lever, 27, which is pivotednearthe end of the crank arm, 25, meansof'a short shaft, 28.` The escapement lever has a short arm, 29, best seen in Figure 3, .said` short arm having a bearing, 30, for a' horizontal shaft, 31, which is provided with a tooth, 92,' disposed between the gears, 19 and y2,0. y'The shaft, 31, is loosely mounted in the Y bearing, 30, and may oscillate therein. The

amount otoseillation, however, is limited by a pin, 33, best shown inFgure 10, which extends transversely through the shaft, 30,

and into slots,34, `formed in the short bearing 30. These slots permit the shaft to be 'oscillated through a certain angle. The

shaft, 31, isyieldingly maintained in the positionV shown in Figure lOby means of a spring, 35, encircling the bearing, 30, which spring tio-'operates with the pin, 33, to main? Y' tain it centrally disposed in the slots, 34, as

f as a pivot.

The ese'apement'lever is ycausedto be oscillated around the shat't28, as a pivot when the operator of the machine depresses the footV piece,'18, and -when so oscillated the escapement tooth, 32, is urged to engagement. with the annular gear, 20, in the manner shown in Figure7. 'The escapementlever, the crank arm,=andy the lever, 13, are Vconsequently ro-r tated counter-clockw1se as seen 1n Figure 3" by the annular gear, until the lever, 13, assumes a position diametrically opposite that shown in Figure 1, at which position: the

i ese'apement lever kis rocked on its pivot, 28,

to'disengage the tooth, 32, from Lthe annular gear and to move lit back, into its neutral povsition 'ass'hownvimFigures 4 and 8. The

tooth will remain in the neutral position as long as the foot piece, 18, is kept lowered by the foot of the operator. As soon as the operator takes his foot oli the toot piece, however, the escapement lever, 27, is rocked on its pivot, 28, in such a direction as to move the tooth, 32, into engagement with the gear, 19, as' shown in Figure 9. The escapement lever, the crank arm, and the lever, 13, are then moved back by the gear, 19, to the position shown in Figure 1, and when they have reached this position the escapement lever is rocked with respect to the crank arm in such manner as to disengage the tooth, 32, from the gear, 19, said tooth again assuming the neutral position where it will remain until the operator again depresses the foot piece.

On the shaft, 15, of the mechanism a gear, 37, is loosely mounted. This gear is of somewhat peculiar design and is best shown in Figure. 2. One-halt the gear has teeth extending entirely around its circumference and forms an ordinary pinion, the other half of the gear has only a single tooth, 38, on its circum'lerence, the rest of the cireumference of this part ot the gear being in the torni ot f a smooth cylinder with a radius equal to the radius of the pitch line of the teeth. The single tooth, 38, `[its in a notch, 39, at the end of the escapement lever, 27, as will be seen from Figure 3. lVhen the tooth, 38, is in the notch on the lever the escapement tooth, 32, is in the neutral position shown in Figure 4t. yThe end of the lever, 27, is also formed with two curved portions, 40 and 41, which have radii equal to that oit the pitch line ot the escapement gear, 37, but the centers ot the curves are oii'set tom the center of the gear. The'escapement gear, 37, is adapted to be rotated through an angle ot 180O so that the tooth, 38, will assume a position diametri 'ally opposite to that shown in Figure 3, which position of the tooth is shown in Figure 6. The rotation of the gear is caused by the operator of the machine through the 'foot lever, 16.

The teeth o1E the gear, 37, which extend entirely around its circumference mesh witl the teeth of a gear segment, 42, which is mounted on a horizontal shait, 43. The gear segment is adapted to be oscillated by the toot lever,1(i, through a link, L14, one end oi which is' pivoted to the lever, 1G, at 45, the other end of which pivoted to the gear .segment at 16. rfhe 'toot piece, 18, is biased to its` elevated position shown in Figure 1 by means` of a coil spring, 17. In this position the gear segment, Ll2, has rotated the pinion, 37.y into the position shown in Figure 3, at which position the eseapement tooth, 32, is in the nentral position shown in Figure at and the lever, 13, is in the vertical position shown in Figure 1.

In the operation and use of the above meehanism, when the operator of the machine steps fit) on the 'loot piece, 1S,the gear segment, 4 2, immediately rotates the escapement gear, 37, through an angle 01""180O to the position shown in Figure 6. rlhe tooth, 38, on the es* capement gea rocks the escapement lever, 27, clockwise, as seen in Figure 3, around the pivot, 28, and the curved surface, Ll1, ot the lever bears against the cylindrical part ont the gear. This rocking of the escapoment lever causes the oscapement tooth, 32, to engage with the teeth of the annular gear, 9.0, so that the escapement lever, the crank arm., and the lever, 13, are rotated as a unit counterclockwise around the shat't, 15. As it rotates, the curved portion, 11, of the escapement lever slides over the cylindrical part of the eseapement gear, 37, and is thus maintained in a lixed angular position with respect to the crank arm so that the tooth, 32, is held in engagement with the annular wheel, 20. `When, however, a rot-ation ot 18()O has obtained, the notch, 39, in the escapement lever strikes the tooth, as indicated by the linesin Figure so that the escapement lever, 27, is rocked back on its pivot, Q8, to disengage the tooth, 232, from the annular wheel as indicated in Figure t3 and to move the tooth to its neutral position. The rotating parts, that is, the escapement lever, the crank arm, and the lever, 13, new come to rest in the position shownV in dotted lines in Figure G and will remain iin that' position as long as the operator of the machine keeps the toot piece, 18, depressed. lli'hen, however, the operator lets up on the foot piece, the spring, 47, urges the toot lever, 16, in such manner as to rotate the gear segment -i-Q, counterclockwise, as seen in Figure 6, and to littV the l'oot piece, 18, to its elevated position shown in Figure 1. l/Jhen the gear s' ment is thus rotated, the escapement gear, 3T, is rotated back from the position shown in Figure to the position shown in Figure 3, and when thus rotated the tooth, 38, rocks the escaplmentlev 1r, 27, around the pivot, 28, so as to cause the curved portion, ett), of the lever to bear against the cylindrical portion ot the escapement gear and to urge the tooth, 32, into engagement with the rotating gear, 15), in the manner shown in Figure 9. r1`lie gear, 19, consequently, rota-tes the escapement lever, the crank arm, and the lever, 13, as a unit bach to their original positions shown in Figures 1 and lVhen the escapement lever has reached this posit-ion, the notch, 539, at its end strikes the tooth. 238, causingr said lover to be rocked around the pivot, 28, to disengage the tooth, 82, from en ement with the gear, 19, and to move it to its neutral position where it will remain the 'loot lever is again depressed. The rotating parts consequently come to a stop in their original position, shown in Figures 1 and 3. In order to insure an accurate functioning ot the mechanism, spring bumpers, a8, may, if desired, be employed, which will stop the motion ol the parts at the exa-ct position desired and will absorb the shock due to the sudden stopping ot the moving parts.

The spring, 35, which encircles the bearing', 30, insures a quick and rapid disengagement:- ot the escapement tooth from the gears and return to neutral. position when the lever, 27, is rocked on its pivot in the manner above described. The spring also serves to retain the tooth in its neutral position and prevents it from engaging in the teeth ot the gears, 19 and 20, except when theescapement lever is rocked on its pivot, 28. The spring pressed ball, 36, insures the accurate positioning olf the escapement lever with respect to the crank arm so that at the positions ol rest these elements bear a fixed relation to one another. The engagement ol the crank arm and the escapement through the spring pressed ball, however, is purely a trictional one which docs not prevent the rocking oi the escapement lever about the shatt, 28, as above described.

Many variations and alterations may be made in the mechanism specifically described above and l desire, therefore, to ho limited only by the state ot" theprior art and the scopo ofthe appended claims. i

claim: Y

1. A driving mechanism comprising rotary members continuously power-driven in opposite directions and concentrically disposed in spaced relation, a crank arm, a lever pivotedto said crank arm, means associated with the lever for engaging with either ot the rotary members, and means tor rocking the lever on its pivot.`

Q. A driving mechanism comprisinga rotary member continuously power-driven, a cranlr arm, a lever pivoted to said crank arm, means associated with the lever for engaging with the rotary member and means tor rocking the lever on its pivot to cause engagement ot said lever with the rotary member whereby the lever and the crank arm are driven by the rotary member and to cause disengagement ot said lever from the rotary member after a 'n'edetermined amountof rotation of the latter whereby the lever and the crank arm come to rest.

3. A driving mechanism comprising a shaft, a rotary member continuously power-- driven disposed on said shatt, a crank arm on the shalt, a lever pivoted to said crank arm, the end of the lever having'` a notch and a concave curved portion, means associw ated with the lever for engaging with the rotary member, a reciting member for the lever mounted on the shaft, said rocking member having a tooth adapted to engage in the notch oi the lever and a convex curved portion with a radius substantially equal to that of the concave curved portion of the lever, and means tor imparting` a rotary motion to said rocking member.

t. A. driving mechanism comprising a l cally disposed in spacelrelation on said shaft,

shaft, rotary members continuously power- Ydriven in opposite directions and concentricallyv disposed in spaced relation on said shaft, the outer of said members having an inward engaging face and the inner of said Amembers having'an outward engaging` face,

aV crank arm on the shaft, a lever pivoted to saidA crank arm, a vtooth associated with the `leverandA disposed between the rotary members,.and means for rocking` the lever on its Jivot. i Y I "5. A, drivingl mechanism comprising a shaft, rotary members continuously power driven in opposite directions and concentrioally disposed in spaced relation on said shaft, the outer of said members having an invvard engaging` ace and the inner ot said members having an outward engaging face, a crank arm onthe shaft', a lever pivoted to the cranli arm,l said lever having` a longv arm and a shortL a C ank arm on the shaft a lever pivotcd to said crank arm, means associated with the lever for engaging` with either ot the rotating members, means tor maintainingY said lever in such position with respect to the crank arm that the engaging' means is in its neutral position and out ot engagement with hoth rotary members, and means Ytor rockingsaid le ver on its pivot.

7. A driving mechanism comprising a shaft, rotary members continuously powerdriven in opposite directions and concentrically disposed in spaced relation on said shaft, a crank :crm on the shaft, a lever pivotcd to said crank arm, the end ol the lever having concave curved portions ot like radii and a notch centrally disposed between said curved portions, means associated with the lever tor engaging with either of the rotary members, a roc ring member for the lever mounted on the sl1att;said rocking member having! a tooth adapted to engage in the notch of the lever and a convex curved portion with a radins substantially equal to the radii of the concave curved portions oi the lover, and means toiimpartinga. rotary motion to said roching member.

In testimony whereof, I have signed my name to this specification this 30th day ot August, 1926.

EDVARD B. O'BY.

Images