US1185194A - Hand-power stump-extractor. - Google Patents

Description

J. F. GORMAN. HAND P OWEB STUMP EXTRACTOR.

APPLICATION FILED OCT-111 915.

Patented May 30,1916.

lA/VE/VTOR John F German.

J'OI-IN F. G'OBMAN, 0F SEATTLE, WASHINGTON.

HAND-POWER STUMP-EXTR-ACTOR.

Specification of Letters Patent.

Patented May so, 1916.

Application filed October 1, 1914. Serial No. 864,545.

To all whom it may concern:

Be it known that 1, JOHN F. GORMAN, a citizen of the United States, and resident of Seattle, in the county of King and State of Washington, have invented a new and useful Hand-Power Stump -Extractor, of which the following is a specification.

My invention relates to improvements in hand power stump extractors, and the objects of my improvements, are: 1. To provide a simple and durable construction combining great power with low cost of manufacture. 2. To provide a simple means of securing high, low and reverse speeds. 3. To provide a portable device of extremely light weight.

Having thus indicated the ends sought by me, reference is to be had to the accompanying drawings forming a part of this specification in which similar characters of reference indicate corresponding parts in all of the figures.

In the drawings: Figure 1 is a plan view of the machine in the ordinary operating position. Fig. 2, is a vertical section of same in the central plane. Fig. 3, is a bottom view of the driving and controlling mechanism in the reverse position with parts broken away. Fig. 4, is a bottom view of the same with a driving mechanism released.

As illustrated 1 and 2 constitute a portable frame made of any suitable material in which the entire mechanism is inclosed. As shown in Fig. 2, the memebrs 1 and 2, preferably of cast metal are connected by the bolt '3 and spacer 4. At the rear end the said members are held in alinement by the bolt 40 connecting the projections 5 and 6, while the forward thrust of the frame member 2 is borne by the projection 7 of the frame 1. By this construction great rigidity is secured with a minimum of connecting parts. It is apparent that the frame member 2 may be fitted to the projection 7 without finishing the contiguous faces of the castings at this point.

The drum 8 of cast metal incorporated with the ratchet wheel 9 is rotatably mounted in the bearings formed by hubs on the frame members 1 and 2 as shown. Said drum is rotated clock wise as shown in Fig. 1 by the pawls 10 and 11 engaging respectively the interior and exterior faces of the ratchet wheel 9. Said pawls are mounted on ournals 12 and 13 incorporated with the rocker I l. The pawl 10 is held in position by the upper flange of the drum 8, and the pawl 11 by washer and split pin. The rocker 14 mounted in the hub forming part of the frame 1, is held in position by the flange 15 in the groove formed by said rocker and the collar 16, rigidly attached thereto,preferably by set screws as shown. Rocking motion is given to the rocker 1 1 by the hand operated lever 17 fitting over the square portion of said rocker.

Vfhen it is desired to operate the drum at high speed for the purpose of moving light ob ects, or of taking up slack in the line, the lever 17 may be placed on the square portion of the clutch member 18 engaging corre sponding teeth upon the drum 8, thus rotat ing the drum during clock wise rotation of the' lever. When the lever 17 is moved counter clock wise the drum is held stationary by the pawls 10' and 11 retained in engagement with the ratchet wheel 9 as to be hereinafter described. Meanwhile the teeth of the clutch member 18 move upon the corresponding teeth of the drum 8 and are brought again into engagement therewith by the spring 19 through the medium of the belt 20 moving freely in the drum 8. 7

Referring to the Figs. 1 and 2, during the clock wise rotation of the drum at either high or low speeds, the pawls 10 and 11 are held in engagement with the ratchet wheel 9 by the springs 21 and 22 through the medium of the members 23 and 24, pivotally mounted upon the inner face of the frame member 1. These members 23 and'24 are operatively connected to Z shaped members 28 and 29, the connection of which to be more fully described. The Z shaped 1nemhere are in turn pivotally attached to a thumb nut 27 located intermediate the said members 23 and 2 1. Thus when the thumb nut is turned clock wise, the Z shaped memother, causing the outer ends thereof to be disengaged from the notches provided in the slots in the frame member 1. The springs 30 which cause said members 28 and 29 to be held in the notches during counter clock wise rotation of the ratchet wheel are held in compression thereby.

When it is desired to allow a gradual reverse motion of the drum the tension in here 28 and 29 are caused to approach each with a the cable 25 being sufficient to effect such rotation, the engagement of the pawls l0 and 11 with the ratchet wheel 9 is controlled as shown in Fig. 3. ii reciprocating motion being given by the lever 17 either pawl as 11 is held in contact with the ratchet wheel 9 by friction against the teeth thereof until it occupies a position near the end of its backward stroke as shown by dotted lines. At this point the forward motion of the alternate pawl 10 effects a slight forward rotation of the ratchet wheel releasing the contact of the pawl 11 therewith. The spring 26 compressed between the pawls 10 and 11 thrusts the pawl 11 to the position shown in full lines.

T he thumb nut 27 rotatably mounted in the frame member 1, more clearly shown in Fig. 1, having been rotated to the position shown in Fig. 3, the Z shaped members 28 and 29 thrust the members 23 and 24 against the springs 21 and 22, to the position shown.

The Z shaped members 28 and 29, preferably of wire, have outward projections engaging the thumb nut 27 and inward propections extending through slots as shown, in frame member 1. Springs 30 inserted in these slots retain the members 28 and 29 in notches in said slots as shown in Fig. 3. Upon the forward motion of either pawl as 10, the inclined face 31 engaging the member 23 forces said pawl again into engagement with the ratchet wheel 9.

l/Vhen it is desired to completely release the drum 8, the thumb nut 27 is turned to the position shown in Fig. l, thrusting the members 23 and 2-1 to the extreme outer positions, and the spring 26 thrusts the pawls 10 and 11 completely out of engagement with the ratchet Wheel 9.

The cable 25 is secured to the drum 8 by means of the key-hole shaped slot 32 in said drum, the end of said cable being provided projection capable of passing through the large end only of said slot. The rear end of frame member 1 is provided with a wedge 3%. The tail hold 35 extend ing around a groove in the slidable wedge draws said wedge toward the lips 33 and is securelyheld by friction with these members. The wedge 34 is preferably mounted upon a projection cast to the frame 1 and is held in position by bolt 36 passing through said projection. This wedge is slidable thereon as shown in dotted line in Fig. 1 to permit the withdrawal of the tail hold 35.

Having thus indicated the ends sought by me what I claim as new and desire to protect by Letters Patent is:

1. In a stump extractor, the combination with a frame, a drum rotatably mounted therein, a ratchet wheel rigidly connected to said drum, a rocking member rotatably mounted within the frame in the same plane as the ratchet wheel, said ratchet wheel provided with outer and inner teeth, reciprocating pawls pivotally connected to said rocker and adapted to engage the outer and inner teeth of said ratchet wheel, means for controlling the contact of said pawls with said ratchet teeth, said means provided with spring actuated parts for predetermining the action of the controlling means, springs connected to the main frame and bearing against the controlling means of the respective pawls, and a lever adapted to be attached to said rocker for producing the rotary motion to said drum.

2. In a stump extractor, the combination with a frame, a drum rotatably mounted therein, a ratchet wheel rigidly connected to said drum, means of rotating said drum independently of said ratchet wheel, a rocking member rotatably mounted within said frame in the same plane as the ratchet wheel, said ratchet wheel provided with outer and inner teeth, reciprocating pawls pivotally connected to said rocker and adapted to engage the outer and inner teeth of said ratchet wheel, a thumb nut controlling means having connecting links, pivoted members operatively connected to said connecting links, said pivoted members adapted to engage said pawls, slots having notches provided in said frame, springs interposed in said slots and adapted to press said links into said notches thereby predetermining the action of said pivoted members in their contact with said pawls, springs adapted to compress said pivoted members against said pawls when not withheld by said controlling means, and a spring located between said pawls for disengaging their contact with said ratchet teeth when the contact of the pivoted members with said pawls has been withheld by said controlling means, and a lever adapted to be attached to either said rocker, or to the means of rotating said drum, for producing high and low speeds of said drum.

JOHN F. GORMAN. Witnesses H. C. AULD, E. B. HERALD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington. D. C.

Images