US1190764A - Speed-changing device. - Google Patents

Description

L. L. HAZEN.

Patented July 11, 1916.

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attowma L. L. HAZEN.

SPEED CHANGING DEVICE. APPLICATION FILED AUG-14,1914.

Patnted July 11, 1916.

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SPEED CHANGING DEVICE.

APPLICATION nuzu AUG-14. 1914.

Patented July 11, 1916.

4 SHEETSSHEET a.

L. L. HAZEN.

SPEED CHANGING DEVICE.

APPLICATION FILED AUG-14, 19M.

4 SHEETS-SHEET 4.

Patented July 11, 1916.

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. LYSIJE 1L. HAZEN, OF JB EAVER FALLS, PENNSYLVANIA, ASSIGNOE, F ONE-HALF 'llU A. HAZEN, 0F BEAVER, FALLS, PENNSYLVIA.

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Specification of Letters Patent.

Patented duly ill, .llhllh'.

application filed August 1t, 1914. Serial Ito. 856,363.

To all whom it may concern:

Be it knownthat ll, LYsLE L. HAZEN, a citizen of the United States, residing at Beaver Falls, in the county of Beaver and State of Pennsylvania, have invented certain new and useful Improvements in Speed- Changing Devices, of which the following is a specification.

This invention relates. to a speed changing device and the principal object of the invention-is to provide a device which is so constructed that the s eed of a machine may be gradually increase or decreased without any undue shock and without danger of portions-of the machine being broken.

it very often happens that when the speed of a machine is increased or decreased by throwing gears into and out of engagement,

the gears will be broken or the machine otherwise injured due tothe sudden jolt of starting and this iswhat this device is intended to overcome. I

Another object of the invention is to so construct the device that the machine may he. quickly moved from a high speed to a low speedy and slowly moved from a low speed to a high spee This invention is illustrated in the accompanying drawings, wherein Figure 1 is a view showing the device in side elevation; Fig. 2 is a transverse sectional view taken along the line 22 ofFig. l, the gears and fly wheel being shown in elevation; Fig. 3 is a sectional view taken along the line 3-3 of Fig. 2; Fig. l is a sectional view taken along the line l-4l of Fig. 1; Fig. 5 is a sectional. view taken along the line 55 of Fig. 4t; Fig. 6 is a sectional view taken along the line 6-6 of Fig. 2; Fig. 7 is a sectional view taken along the line 77 of Fig. 6; and Fig. 8 is 'a fragmentary view of a portion of the machine.

' The driven shaft 10' which forms a portion of a suitable machine provided with a rotating shaft is rotatably mounted in the bearings ll of the frame 12 and carries fly wheels 13 which are located outside the frame and gears or pinione it and lh'which are located between the hearings ll. This shaft 11.0 is continuously rotated while the machine is in operation and therefore the machine which it leads to and forms part of will be continuously rotated and not interrupted in its operation. etwwn thebcarlugs 11 there is ovided a traclt lt in which there is slidably mounted a rack bar 17 which rests uuon the rollers 18, thus permitting the rack bar to reciprocate easily. The outer end of the rack bar 17 is connected with a cross head 19 which slides in a suitable track including upper and lower bars 20 and 21 which have their outer ends connected by the vertical brace 22.

It is desired to transform the reciprocating motion of the rack bar into rotary motion for the driven shaft 10 and therefore there has been provided a shaft 23 which is rotatably mounted above the rack bar and carries a pinion'24 which is keyed to the shaft 23 and meshes with the teeth of the rack bar. Driving gears 25 and 26 are loosely mounted upon the shaft 23 upon opposite sides of the gear or pinion 24: and are held against longitudinal movement upon the shaft 23 by means of the disks or washers 27 and 28. These gears 25 and 26 are provided with extensions or shoulders 29 and 30 which form housings inclosing the rollers 31 forming part of the clutches 32 formed upon the shaft 23. One of these clutches is a right-hand clutch and the other a left-hand clutch. It will therefore be seen that when the bar 17 is reciprocating, the gear 25 will be rotated when the bar is moving in one direction and the gear 26' rotated while the bar is making a return stroke.

In order to transmit rotary motion from the gear 25 to the shaft 10 there is provided a pinion 33 which is rigidly mounted upon the shaft 34 rotatably mounted in the bearings ll. This shaft 3t carries a pinion or gear 35 which meshes with the gear or pinion It and it will thus be seen that the rotary motion from the car 25 will be trans mitted to the shaft 3t t irough the medium of the gear 33 and willthen be transmitted from the shaft 341. to the shaft 10 through the medium of the gears 35 and 14:. it will thus he secn'that when the gear 25 is rotated as the bar 17 moves in one direction the shaft 10 will be rotated and that upon the return stroke of the bar 17, the shaft 10 will he caused to rotate in the same direction by the gear 26 which meshes with the gear l5. "Therefore the shaft 10 will always rotate in the same direction for the whole time when the bar i7 is moving.

Adjacent the frame l2 there is provided a second frame 36 which carries standards or hearinp 37 d 38. it drive shaft 33 tit till

littltill lllld its stub shaft 43 rotatably mounted in the bearing 37, a large gear 44.being..rigidly mounted upon the inner end of the stu shaft and meshing with the gear 40 6f shaft 39. In the outer face of the disk 42 there is formed a pocket 45 in which there is rotatably mounted a screw 46 carrying a pin 47. This pin 47 extends beyond the outer face of the disk 42 and extends through the coupling head 48 of thedriving arm 49, the

opposite end of which is connected with the cross head 19. It will thus be seen that as thedisk 42 is rotating, the arm 49 will cause reciprocatingmotion to be transmitted to the rack bar 17. It will alsobe noted that by adjusting the position of the finger 47 upon the screw 46, the length of the stroke given the rack bar 17 maybe regulated and thus the. speedat which the shaft 23' rotates controlled.

In order to adjust the position of the pin 47 upon the screw'46 it is necessary to rotate the screw and therefore there has been provided a miter gear 50 which meshes with a second miter gear 51 rigidly mounted upon the shaft'52 rotatably mounted in an open ing formed in the stub'shaft 43 of disk 42. This shaft 52 carries a larger miter gear 53 upon its opposite end which meshes with a relatively small miter gear 54 rigidly mounted upon the upper end of a vertical shaft- 55, the lower end of which is rota-.

tably mounted in a socket 56 formed in the frameor base plate 36. By causing this shaft55 to rotate inione direction the screw 46 will be turned to move the pin 47 toward the center of the disk 42 and by rotating the shaft 55 in the opposite direction, the

pin' will'be moved to the position shown in .Fig. 4. In order to accomplish this there are provided gear plates 57 and '58 which are rotatably mounted upon "the vertical shaft 55 and carry clutch collars 59 and 60. The beveled gear plate 57 meshes with a miter gear 61 which is relatively small and the beveled gear plate 58 "meshes with a beveled gear plate 62 which is of approximately the same size as ,the gear plate 58. These gears 61 and 62 are rigidly mounted upon a shaft 63 which carries a gear 64 meshing with the gear 41. It will thus be seen that the gear plates 57 and 58 will be contlnually rotated through the medium of the gears 61 and/62. It will be noted, however, that the ar 58 will rotate a great deal faster than t e gear return the clutch block 65 to the 57. It will therefore be seen that when the clutch block 65 is moved into the socket of the clutch collar 59, the shaft 55 will rotate at its lower rate of speed than it does when the clutch block is moved into the .socket of the clutch collar 60.

In order to move the clutch block 65 longitudinally upon the shaft 55 there is provided a rod 66.. which is rotatably mounted in-the bearings 37 and 67 and has its inner end bent to form an arm 68 pivotally connected with the fork 69 which fits into the annular groove 70 of the clutch block 65. A lever 71 is rigidly mounted upon the outer end of the rod 66 and is connected with the operating rod 72 which may be moved vertical ly by any suitable means. This rod 72 carries abutments 73 and 74 which extend toward the disk 42 so that they will be engaged by the finger 75 extending from the plate 76 secured to the outer end of the pin 47.

When the clutch block is in the position shown in Fig. 4, the disk may rotate but the screw 46 will remain stationary and therefore the position of the pin 47 upon the screw 46 will not bechanged. If it is desired to decrease the speed at which the shaft 23 rotates, the rod 72 will be moved downwardly, thus turning the rod 66 and moving the clutch block 65 into the socket of the clutch .collar 60. The shaft. 55 will then be rotated and rotary motion transmitted to the screw 46. As the screw 46 rotates, the pin 47 will be moved toward the center of the disk, thus gradually decreasing the length of the stroke given the rack bar 17 until the finger 75 strikes the abutment 73 and moves the rod 72 upwardly a sufficient distance to rotate the rod 66 and osition shown in Fig. 4. If it is desired to increase the speed .of the machine, the rod 72 is,

raised, thusbringing the clutch block into the socketflof the clutch collar 59. The shaft 55 willnow rotate at a slower speed than it did before and the pin 47 radually.

moves along thescrew 46. until t e finger 75 strikes the abutment 74 and lowers the rod 72 to return the clutch block to the po- It will therefore be seen that sition shown. the speed of the machine can be slowly increased until the high speed is reached and the'clutch block'then automatically moved out of an operative position. It will also be seen that thespeed of the machine can be more rapidly decreased until a normal speed is reached andthe clutch then automatically thrown out of an operative position. I have therefore provided a very efii cientmachine for increasing and decreasing the speed of a machine with which it is connected and that the device cannot be broken or get out of order by being left in operation for too great a length of time since iaoonca when the speed has been increased to a cer-' tain degree, the clutch will be automatically thrown out and that the same result will be accomplished when the speed has been decreased as much as desired.

What is claimed is 1. In a machine of the characterdescribed a frame including a bearing standard, a disk provided with a stub shaft rotatably' supported by said bearing standard, a rotatable shaft extending through said stub shaft into a pocket formed in the outer face of said disk, a screw rotatably mounted in said pocket, a pin mounted uponsaidscrew,gears connecting said shaft and screw whereby said pin may be moved longitudinally-upon said screw when said screw is rotated, means for rotating said disk, means for rotating said shaft including a clutch and cooperating gears, and means operated by said .pIn

' for automatically moving said clutch. from an operative to an inoperative position,

2. A machine of the character described including a support, a disk rotatably carried by said support and provided wlth a pocket in its outer face,a screw rotatably mounted in said pocket, a finger carried by said screw and movable longitudinally thereon when said screw is rotated, means for rotating said screw ineled-ing a clutch and cooperating gears, means actuated by said finger for moving said clutch from .an

operative to an inoperative position, and means for rotating said disk.

3. In a machine of the character described a support, a disk'rotatably carried by said support and having a pocket formed therein, a screw rotatably mounted in said. pocket,

a rotatably mounted driving shaft rotatably carried by said sup-port, gears connecting said driving shaft with said disk, a shaft rotatably carried by said disk and extending into said pocket, gears connecting said second'shaft with said screw, a vertical shaft rotatably carried by said support, gears connecting said vertical shaft with said second mentioned" shaft, a shaft rotatably carried by said support, gears connecting said driving shaft with said last mentioned shaft, clutch plates rotatably mounted upon said vertical shaft, gears connecting said third shaft with said clutch plates whereby said clutch plates may be, independently rotated in opposite directions, a clutch block slidably mounted upon said vertical shaft, shifting means for moving said clutch block into engagement with a selected one of said 1 plates, a pin mounted upon said screw for longitudinal movement thereon, and means extending" from said pin for engaging the shifting means of saidclutch block to actuate the same and move said clutch block to an inoperative position upon said pin reaching opposite ,end portions of said screw." Y

4:. A machine of the character described 'includingarotatably mounted disk, a screw rotatablyconnected with said disk, a pin mounted upon said "screw for longitudinal movement thereon, means for transmitting rotary motion to said screw, said means including a clutch havingupper and lower clutch plates rotating in opposite directions, a clutch block slidably[mounted between said clutch plates, a rotatably mounted rod, a fork engaging said clutch block and connected with said rod whereby said clutch block may be moved in opposite directions vby rotatingsaid rod, a second rod connected tit connected with said disk, a pin carried by said screw and adapted for longitudinal movement thereon, a shaft for rotating said screw, means for rotating said disk, means actuated by said last mentioned means for transmitting rotary motion to said shaft,

sai last mentioned means including, a rotatable shaft, clutch plates rotatably mounted thereon, a clutch block slidably mounted upon said shaft between said clutch plates, means for moving said clutch block into engagement with a selected one of said clutch plates and including abutments, and means extending fromsaid pin for engaging said abutments to actuate said last mentioned means and cause said clutch block to be moved to an inoperative position.

In testimony whereof I aflix my signature in presence vof two witnesses.

LYSLE L. HAZEN. Witnesses:

EMIL H. Gnossnass,

L. M. SHRIVER.

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