US797029A

US797029A - Driving mechanism.

Info

Publication number: US797029A
Application number: US22953404A
Authority: US
Inventors: John Ulrich
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-10-22
Filing date: 1904-10-22
Publication date: 1905-08-15
Anticipated expiration: 1922-08-15

Description

No. 797,029. PATENTED AUG, 15, 1905.

J. ULRICH.

DRIVING MECHANISM.

APPLICATION FILED OUT. 22, 1904.

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C. Stou ghion. 8263526 I I raga BY I ATTORNEYS PATENT OFFICE.

JOHN ULRICH, OF COLUMBUS, OHIO.

DRIVING MECHANISM.

Specification of Letters Patent.

Patented Aug. 15, 190

Application filed October 22, 1904. Serial No. 229,534..

To all whom it may concern:

Be it known that I, JOHN ULRICH, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio. have invented a certain new and useful Improvement in Driving Mechanism, of which the following is a specification.

My invention relates to a new and useful improvement in driving mechanism for drills,

cutters, and the like.

The object of the invention is to provide simple means of superior construction for transmitting motion and driving the several parts.

Another feature resides in gears traveling at unequal speeds and a stop mechanism arranged between the gearsto automatically cut off the power when one gear has gained a full revolution on the other.

Finally, the object of the invention is to provide a device of the character described that will be strong, durable, and eflicient and simple and comparatively inexpensive to make and one in which the several parts. will not be liable to get out of working order.

With the above and other objects in view the. invention consists of the novel details of construction and operation, a preferable embodiment of which is described in the specification and illustrated in the accompanying drawings, wherein Figure 1 is an under side plan view with the bottom of the casing removed for more clearly illustrating the parts. Fig. 2 is a vertical sectional view taken on the line a' m of Fig. 1. Fig. 3 is a side elevation, the casing being removed. Fig. 4 is a plan view of the parts shown in Fig. 3, and Fig. 5 is a cletailed view showing the upper gear in section on the line yy of Fig. 1 and the stop-clog and other portions in elevation.

In the drawings the numeral 1 designates the drive-shaft, which is formed with an integral laterally-extending head 2. The head 2 is adapted to fit in a registering recess 3 of a drive-gear 4. The drive-gear 4 is formed upon its upper surface with an'annular ring projection 5, formed with an angular groove 6. A gear 7 provided with a shouldered sleeve 8, loosely encircling the drive-shaft 1, is formed in its under surface with an annular recess 9 and a downwardly-projecting track portion 10, which registerand engage with the annular ring 5 and groove 6 of the drivegear 4, as clearly shown in Fig. 2. The track 10 is formed with a V-shaped recess 11 at one side, adapted to receive a round-pointed dog 12, carried by the drive-gear 4t and a notched plate 13. The dog 12 is set into the notched plate 13, so as to lie flush with the periphery thereof when the same revolves, which it is caused to do by a key 14, securing the said plate to an extension 15 of the shaft 1. It will be apparent by observing Fig. 5 that the V-shaped recess 11 is slightly wider than the point of the dog 12, and owing to the fact that the gear 1 revolves at a higher rate of speed than the gear 7 when motion is imparted to the said gears the rounded end of the dog12 will be caused to ride down one of the inclined walls of the recess 11 and travel on the surface of the annular track 10 until the said fast gear has gained a complete revolution upon the slow gear, when the dog will drop into the recess 11 and momentarily lock the two gears together after the said dog has traveled completely around the track.

For forcing the dog 12 into the recess 11 I provide a flat spring 16, which is securely held in a cut-away recess 17 in the head 2 of the shaft 1, which cut-away recess not only holds the spring, but allows it free play, as is obvious by observing Fig. 2. The dog 12 is likewise formed with a cut-away opening 18, into which the opposite end of the spring is passed, as clearly shown in Fig.2. In Fig. 2 the dog is shown as resting in the recess 11, and it is readily discernible that when the dog is forced downward onto the track 10 the spring 16 is also bent down ward, thus holding the dog under tension and readily forcing it into engagement with the recess llwhen the latter passes over the said dog. The dog is formed at its lower end with an annular recess 19, which is adapted to receive the end of a rod 20, connected to a suitable cut-off mechanism, which when the said rod enters the recess 19 cuts off the power, thereby stopping the movement of the parts. When the parts are started, the rod 20 is moved backward, thus withdrawing it from the recess 19 and operating the cut-off, so that the parts start, thereby forcing the dog downward. The rod 20 being in line with the plate 13 will bear against the periphery thereof during its revolution and also against the face of the dog 12 until it is forced into the recess 11. The essence of this invention, however, resides in the driving mechanism and its parts. For the purpose of supporting and inclosing the parts I provide a casing 21, which is formed With a tubular extension 22, surrounding the sleeve 8 of the gear 7 and otherwise suitably constructed and arranged to inclose the parts.

The numerals 23 indicate portions of links or pitmen which are connected to the pistons of a suitable engine. The pitmen 23 are pivoted upon the wrist-pins 24 of cranks 25. The cranks 25 are formed integral with shafts 26, upon which are formed pinions 27 in mesh with the drive-gear 4. It is to be observed that the cranks are arranged at a quadrant to each other or one crank a quarter of a revolution in advance of the other, so as to facilitate the starting of the drill. The shafts 26 at their upper ends carry eccentrics 28, about which are arranged rings 29, formed on the ends of valve rods 30, which are suitably formed and connected with the valve mechanism of the suitable engine with which the pitmen 23 are connected. The cams and camrings are arranged to correspond with the positions of the cranks 25, so as to lead the same. It is apparent that the pinions 27 transmit motion to the drive-geare. A stub-shaft 31, having a screw-threaded engagement with the casing 21, is arranged centrally between the pinions 27 and is formed at its lower end with a head 32, through which the rod 20 of the stop mechanism passes, thus forming a support for the same.

Loosely confined upon the stub-shaft 31, between its head 32 and a washer-nut 33, is a double-faced pinion 3 1, formed with a large ring of teeth 35, engaging with the drive-gear 4E, and a smaller ring of teeth 36 in engagement with the larger gear 7 the large gear 4 transmitting motion to the double-faced pinion 34 by means of the teeth 35 and the latter transmitting motion to the large gear 7 by its teeth 36. It is obvious from this that motion is applied directly to the drive-gear and driveshaft, which imparts motion through the double-faced pinion 3 1 to the large gear 7 and also that the drive-gear4 revolves at a higher rate of speed than the large gear 7. It is, however, to be further understood that the differences in speed of the two gears is slight and that the drive-shaft 1 will be revolved a great number of times before the drive-gear 1 gains a complete revolution upon the drivegear 7 In view of the foregoing description it is not thought necessary to set forth the operation of the device in detail. A suitable tool or tools being connected to the drive-shaft and the rod 20 being moved backward, motion is imparted to the parts, and the gears Will revolve until the dog 12 is forced into the recess 11 by the spring 16 and the rod 20 moved forward by its engagement with the recess 19, thus cutting oi the power and stopping the parts.

Having now fully described my invention, what I claim, and desire to secure by Letters Patent, is-

1. In adevice of the character described, the combination with a drive-shaft and a fast gear and a slow gear, of driving means comprising crank-shafts, means operated by the crankshafts for transmitting motion to the fast gear, and rotatable means in engagement with the fast gear for transmitting motion to the slow gear.

2. In a device of the character described, the combination with a drive-shaft and a fast gear and a slow gear, of driving means comprising crank-shafts one set in advance of the other, pinions mounted upon the crank-shafts engaging with the fast gear, eccentrics mounted upon the crank-shafts, a pinion meshing with and driven by the fast gear, and a second pinion meshing with the slow gear and connected to and driven by the last-named pinion.

3. In a device of the character described, the combination with a drive-shaft and a fast gear and a slowgear, of driving means comprising crank-shafts in connection with pitmen of a suitable engine, one crank-shaft being set in advance of the other, pinions carried by the crank-shafts and meshing with the fast gear for driving the same, a double-faced pinion meshing with both the fast and the slow gears, and means for rotatably supporting the said double-faced pinion.

JOHN ULRICH. In presence of- A. L. PHELPS, M. B. SCHLEY.