US1237025A - Mechanical cut-out gear. - Google Patents

Description

G. C. DAVISN.

MECHANICAL CUT-OUT GEAR. APPLICATION HLED AuG.5. 1916.

1,237,025. Patented Aug. 14,1191?.

4 SHEETS-SHEET 1.

G. c. DAWSON. MECHANICAL cuT-ou GEAR.

APPLICATION FILED AUG.5. 1916.

l Patented Aug.'14, 1917.

.Num HF MQW" G. c. DA'vl'vsoN. MECHANICAL CUT-OUT GEAR. I

APPLICATION FILED AUG.5. ISIS.

G. C., DAVISON.

MECHANICAL cuT-ou GEAR. APPLICATION HLED AUG5| 1916.

Patented Aug. 14, 1917.

4 SHEETS-SHEET GREGORY C. DAVISON, OF NEW LONDON, C

COMPANY, OE NEW YORK, N. Y.,

ONNECTICUT, ASSIGNOR TO ELECTRIC BOA-'2 A CORPORATION OF NEW JERSEY.

MECHANICAL CUT-'OUT GEAR.

Application led August 5, 1916.

To all whom it may concern Be it known that I, GREGORY C. DAvIsON, a citizen of the United States, and a resident of New London, in the county of New London and State of Connecticut, have invented certain new and useful Improvements in Mechanical Cut-0ut Gears; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to mechanical cutout mechanisms designed to positively stop a driven member after a predetermined number of revolutions, while allowing the rotation of the driving member to continue.

One object of the invention is to provide a cut-out of this character in which the connection between the driving and driven members is altered after a predetermined number of revolutions of the driven member so as to permit the overrunning of the driving member in the same direction of rotation, while still maintaining a driving connection between the members in the reverse direction of rotation of the driving member.

vA further object of the invention is to provide a mechanism of this character which will operatively connect a driving gear with a driven shaft on which it is mounted; which will involve no working parts of large diameter and which may be entirely inclosed within a surrounding sleeve or casing.

A further object of the invention is to provide a device of this character which upon each operation of the driving member in either direction will rotate the driven member a definite predetermined number of revolutions and without regard to the number of revolutions of the driving member eX-` cept, of course, that the rotation be continued long enough 'to effect the predetermined movement of the driven member, whereby a part to be adjusted from one eX- treme position to another may be operated by merely starting the rotation of the driving member in the proper direction and allowing its rotation to continue an indefinite period, even until vthe reverse adjustment of the part is to be effected, if the consumption of power is of no moment.

A further object of the invention is to provide a mechanism of this character which will be positive in its action, affording a Specification of Letters Patent.

Patented Aug. i4, i917. serial No. 113,263. i

Figure 1 is a longitudinal section through l a cut-out mechanism of struction;

Fig. 2 is a longitudinal section at right angles to Fig. 1 and on line 2 2 of Fig. 1; anc

Figs. 3, 4, 5 and 6 are transverse sections on the correspondingly numbered lines of Fig. 1.

Referring to the drawings, 8 indicates the drivingmember, here shown as comprising a bevel gear 8b whose hub is freely rotatable on the driven shaft 7, the gear having on its hub a counterbored sleeve 8a surrounding the driving shaft for a portion ofits length, but spaced therefrom by an annular recess.

The driving member may be held against longitudinal movement by a bearing collar 9 and the shaft 7 will also be held against longitudinal movement by suitable thrust bearings, not shown.

The driven shaft 7 is enlarged at that portion within the sleeve 8 of the driving member and has keyed to it by spline 7 for longitudinal movement on its enlarged portion a sleeve 14 Whose end projects beyond the end of the sleeve SaM and is provided witha shipper collar 21 by which the sleeve 14 may be longitudinally moved on the enlarged portion of the shaft 7 in a manner to be hereinafter described.

The portion of the sleeve within the eX- tension 8a is of a substantially smaller diameter than the internal diameter of the eX- tension except at the end of the sleeve where it is provided with a collar 14a having in two opposite sides longitudinal recesses 14d, as more fully shown in Fig. 3 of the draw- 1n Y he extension 8a is provided on two opposite sides with longitudinal enlargements in the'middle portion of each of which is fixedly attached a key 13 of a width to fit the longitudinal grooves 14d of the collar 14 and form a driving connection between the sleeve and the extension..U The keys 13de such preferred connot extend the full length of the extension a, but at one end of each longitudinal enlargement there are providedV pawls 10 operating to effect a driving engagement with the collar 14a in one direction of rotation, the enlargements at the other end of the keys 13 being provided with pawls 11 to eect a driving connection in the other direction ofl rotation. Tflach of the pawls 10 and 11 is composed of a block sli'dingly mounted for radial movement in the longitudinal extension of the' sleeve 8a with a portion of its inner face curved to fit the curve of the base of the groove 14d, one end of the block being cut away to provide an inclined face whereby the pawl will be moved outwardly by the edge of the collar 14a upon rotation of the driving member in one direction. Each pawl is backed by a compression spring for holding it yieldingly toward the sleeve 14, the spring being backed by a suitable cap 12 closing the opening back ofthe pawl.

The sleeve 14 is shifted longitudinally by means of a nut 19 working on a threaded sleeve 18 xed'ly attached to the driven shaft beyond its enlarged portion, the nut 19 being formed with a fork .20 engaging the pin set in the oppositeV sides of the shipper ring 21 carried by the end of the sleeve 14. The n ut 19V is held against rotation on the thread 18 by a fork 19 projecting from one side of the nut and working on a fixed rod 17 supported along' side the shaft. rllhe rod 17 carries a scale 15 on which may be engraved scale marks indicating the amplil tude of movement of the nut 19 and sleeve 14. In the drawing two scale marks 15a and 15b, indicating the full extent of movement of the sleeve, are shown, the fork 19 carrying a pointer 16 cooperating with the scale marks.

The operation. of the device will now be described. Let us assume that the parts are in the position shown in Fig. 1 and that it is desired to rotate the driven shaft 7 in the direction of the arrow 8C, Figs. 1, 3 and 5. In the position in which the parts are shown, the ring 14a of the sleeve 14 lies entirely to the left of the keys 13 with the full width of the notches 14d`engaged by the pawls 10 in a position to communicate motion in the direction of the arrow 8C from the driving member carrying the pawls 10, to the sleeve 1:4 keyed on the driven' member. The direction of the thread in the sleeve 18 is such that rotation in the direction of the arrow 8C will shift the nut 19 longitudinally of the thread away from the enlarged*A portion of the` shaft 7 or toward the scale mark 15b. As soon as the rotation ofthe shaft through the pawls` commences the nut will begin to travel along the thread', drawing the sleeve 14V with it, whereby theV notches 14d in the collar of thek sleeve pass from engagement with the pawls 10 into engagement with the keys 13 of the driving member. The keys thereafter transmit the rotary movement of the driving member to the driven member, the longitudinal movement of the sleeve 14 continuing as will be obvious until the end of the sleeve 14 clears the end of the keys 13, that is until the longitudinal movement of the sleeve equals the distance between the lines 14 and 14, Fig. 1 of the drawing. Then the end face of the sleeve 14 reaches the point 14 the notchesl in the collar 14a will clear the keys 13 and be engaged only by the pawls 11. The pawls 11, as previously stated, have their working edges arranged oppositely to the edges of the pawls 10 so that the pawls 11 will not drive the sleeve but will pass freely out of the notches, allowing the driven shaft to come to a stop and the driving shaft to continue in rotationin the direction of the arrow 8C.

rlhe pitch of the thread of the sleeve 18 is selected with relation to the amplitude of movement of the sleevel 14` such that it will require the desired number of revolutions to shift the sleeve 14 from one extreme position to the other, as indicated by the lines 14 and 14 or between the scale marks 15a and 151. Y

The driving member may be allowed to continue its rotation until it is desired to turn the part adjusted by the shaft 7 to its original position, or the driving member may be stopped after its rotation has been continued for a time known to be more than sufhcient to effect the desired movement of the part to be adjusted. When it is desired to return the ultimately driven part to its original position the direction of rotation of the driving member is reversed, as indicated by the arrow 8d. As soon as the pawls 11 reach the notches in the collar 14av of the sleeve 14 in this direction of rotation their driving teeth will engage the shoulders formed by the edge of the notch and rotate the driven shaft in the direction 8b. The rotation of the screw 18 in this direction will obviously shift the nut 19 and the sleeve 14 in the reverse direction, thereby bringing the notches 14fL again into engagement with the fixed keys 13, the collar traveling the length of the keys until its inner edge clears the end of the casing and the notches are again engaged solely by the pawls 10. In this direction of rotation the pawls 10 will not rotate the sleeve, and the driven shaft will come to rest with the parts in the position shown in the drawing. A

My improved cut-out mechanism will be particularly useful for adjusting parts from a definite operative to an inoperative position, and vice versa", where considerable power is required to effect the adjustment. One such use which may be mentioned is the adjustment of the bow rudders of submarine boats, which rudders are folded or extended according to the desired operation of the boat. To adjust the rudders the operator has merely to start the motor or other driving connection for the gear 8b in the proper direction and let it run for a suiicient time to be sure that the full movement of the rudder has been accomplised. The rudder will automatically stop when the full adjustment is accomplished without attention from the operator. l

I claim:

l. In a power transmitting mechanism the combination of a driving and a driven member7 connections between said members for effecting the rotation of the driven member from the driving member, said connections comprising a coupling operative in one direction of rotation ooi: the driving member,

and means operated by the movement of the members after a predetermined number of revolutions for rendering said coupling m- .operative in the then direction of rotation oi' the driving member but not in the opposite direction, said connections including a plurality ofcoperant clutch-members one of which always rotates with the driving member irrespective of the condition of the coupling.

2. In a power transmitting mechanism the combination of a driving and a driven member, connections. between said members for effecting the rotation of the driven member from the driving member, said connections comprising a coupling operative in vboth directions of rotation of the driving member and means operated by the movement of the members after a predetermined number of revolutions for rendering said coupling inoperative in the then direction of rotation of the driving member and maintaining said coupling operative in the opposite direction of rotation of the driving member, said connections including a plurality of coperant clutch-members one rotatingwith the driving member and the other rotating with the driven member.

3. In a power transmitting mechanism the combination of a driving and a driven member, driving connections between said members operative in one position of adjustment to transmit power in .one direction of rotation and in another position of adjustment to transmit power in the opposite direction of rotation of the driving member, and a control mechanism for said driving connections operated by the rotation of the driven member to adjust said driving connections from one said position to the other said position after a predetermined number of revolutions of the said driven member, said connections including a plurality of coperant clutch-members one carried by the driving member and the other carried by the driven member.

4. In a power transmitting mechanism the combination of a driving and a driven member, driving connections between said members operative in one position of adjustment to transmit power in one direction of rotation andin another position of adjustment to transmit power in the opposite direction of rotation of the driving member, the said driving connections being designed to permit overrunning of the driving member in one direction of rotation in each of the said positions of adjustment, and a control mechanism for said driving connections operated by the rotation of the driven member to adjust said driving connections from one said position to the other said position after a predetermined number of revolutions of the said driven member, said connections including a plurality of coperant clutchmembers operatively connected to the driving and driven members whereby one of the clutch-members moves in a circular path while the other moves in a spiral path during rotation of the driven member with the driving member.

5. In a power transmitting mechanism the combination of overlapping driving and driven members, a clutch between said members, a control mechanism for said clutch for automatically rendering it inoperative in one direction of rotation without rendering it inoperative in the opposite direction of rotation, said control mechanism being operated by the rotation of said members to effeet the release of said clutch in one direction of rotation after a predetermined number of revolutions of the driven shaft.

6. A power transmitting mechanism comprising driving and driven members, a clutch between said members comprising two one-way clutch parts carried by one of said members, a cooperating clutch part carried by the other said member and adapted for coperation with either of said first mentioned clutch parts, and means operatively connected to the driving member for automatically etiecting the relative movement of said clutch parts to render said power transmitting mechanism inoperative in one direction of rotation after ai predetermined jmmber of revolutions of said driven mem- 7 In a device of the class described, the combination of overlapping driving and drivenmembers, a clutch mechanism between said members comprising two Oneway clutch parts operative in opposite directions connected to one of said members, an intermediate clutch part operative in both directions also connected to said member, a complementary clutch part carried by the other of said members and adapted to cooperate with all of the clutch parts of the iirst member, and means for automatically eiecting a relative movement of said clutch parts to bring said complementary clutch part successively into engagement with the clutch parts of said firstl mentioned member.

8. In a device of' the class described, the combination of overlapping driving and driven members, a clutch mechanism between said members comprising two oneway clutch parts operative in opposite directions connected to' one of said members, an' intermediate clutch part operative in both directions also connected to said member, a' `complementaryclutch part carried by the other of said members and adapted to cooperate with all of the clutch parts of the first member, and means for automatically effecting a' relative movement of said clutch parts to bring said complementary clutch part successively into 'engagement with the clutch parts of said first mentioned member, said last named means comprising a member having operative engagementv with the driven member for effectingvv the complete disengagement of said last mentioned clutch part with all but one of the clutch parts of said first mentioned member after a predetermined numb'er of revolutions of said driven member.

9. In a device of the class described the combination of a driving member and a driven member, a clutch mechanism between said members comprising` a pair of oppositely acting one=way clutch parts carried by said driving member, said clutch parts being arranged in axially spaced relation with an intermediate clutch party operative in both directions of rotation, a complementary clutch party carried by said driven member and mounted for longitudinal movement thereof, said complementary clutch part b`e ing adapted for coperation with all three of the clutch parts of the driving member, and means operatively connected to the driving member for longitudinally shifting said driven clutch part upon rotation of said driven shaft to bring'said driven clutch part into position to be engaged only by one of said one-way clutch parts after a predeter- Legacies mined number' of revolutions of the driven shaft.

10. In a device of the class described, the combination of a driven shaft, a' driving member mounted for rotation on said driven shaft, a clutch mechanism between said parts comprising a sleeve connected to the driving member extending' concentrically of the driven member, pawls at the opposite end of said sleeve, said pawls being arranged for operation in opposite directions of rotation, a key extending longitudinally of said sleeve between said pawls, a driven clutch part mounted for axial movement on said driven shaft and having a recess designed for cooperation with either of said pawls or with said key and means for longitudinally adjusting said last mentioned sleeve to bring said recess successively into engagement withthe first of said pawls, the key, and the secondv of said pawls.

1l. In a device of the class described, the combination of a driven shaft, a driving member mounted for rotation on said driven shaft, a clutch mechanism between said parts comprising a sleeve connected to the driving member extending concentrically of the driven member, pawls at the opposite end of said sleeve, said pawls being arranged for operation in opposite directions of rotation, a key extendinglongitudinally of said sleeve between said pawls, a driven clutch part mounted for axialmo'vement on said driven shaft and having a recess designed for Coperation with either of said pawls or with said key, and meansv for longitudinally adjusting said last mentioned sleeve to bring said recess successively into engagement with the first of said pawls, the key, and the second of said pawls, said means comprising a part threaded on said driven shaft and held against rotation and operatively connected to said driven sleeve to thereby effect the@ complete adjustment of said sleeve upon the completion of a predetermined number of revolutions of the driven shaft.

In testimony whereof I affix my signature.

GREGORY C. DAVISON.

Copies of this patentl may be obtained for v cents each, by' addressing'v the Commissioner f Patents, Washington, Il);V 0.,

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