US1911355A - Double action ratchet brace - Google Patents

Description

y 30, 1933- R.. E. DORMAN 1,9

DOUBLE ACTION RATCHET BRACE Filed Aug. 31, 1931 2 Sheets-Sheet 2 IN VEN TOR: Z W

A TTORNEY Patented May 30, 1933 RALPH E. DOB-MAN, or NITTAN PENNSYLVANIA 1 DOUBLE A cTIo RA'rcHET BRACE Application filed August 31, 1931; Serial No. 560,287.

7 This invention is a double action ratchet brace for wood boring and the'like.

One object isto provide a boring tool operable in comparatively restricted places,

such as corners or laterally through joists under floors.

Another object is to provide a tool of the kind referred to having a lever operated chuck, the latter being adapted for continuous rotation in either direction desired, under the oscillating driving action of the lever.

Another object is the provision of a ratchet boring brace operable through an oscillating hand lever and through a gear train transmitting the lever action to the chuck, there being a reversible ratchet control for the gear mechanism, wherebythe chuck may be caused to rotate continuously in either direction notwithstanding the oscillating motion of the handle. 7 1

WVith these and such other objects and advantages as may appear, attention is called to the following specification and to the accompanying drawings as constituting a part thereof and wherein Figure 1 is a side elevation of the tool assembly, the rotatable connection between handle and chuck being in section to. show the arrangement of the adjustable lock ball races and ball bearings; v

Figure 2 is an enlarged detail of the medially mounted gear train or system for driving the chuck, portions of the handle and chuck being broken away;

Figure 3 is a section on the line 3- -3 of Figure 1; V

Figure 4 is an enlargedsection on the line 44 of Figure 1; V

Figure 5 is an enlarged section on the line 5-5 of Figure 3;

Figure 6 is an enlarged section on the line 66 of Figure l.

The invention comprises a handle bar 1 with hand knob '2 at its'upper end, having a medially located, transversely extended and preferably integrally formed gear shaft hub 3 and having its lower end journaled and threaded as shown at 4. Agear shaft 5 is passed tightly through the hub 8 and a pair of bevel gears 6" andpreferably integrally connected and smaller ratchet gears 7 are freely mounted upon the ends of this shaft; Side plates 8 having inturned margins 9 are set overthe outer sides of these gears, the plates which the ends of the shaft 5 are passed. Bushings 11 are then set over the ends of the shaft 5 and into the holes 10 of the plates, the plates having holes 10 formed through them adapted to align with the ends of the shaft 5. Threaded bores '12 are extended into the ends of the shaft 5 and set screws 13 are set thereinto with their heads overlying the bushings lland thus locking the gears in place. A spacer 14 is provided with side plates 15 extended within'the plates 8, and set screws 16 are passed through the plates 8 and 15 and through spacing bushings 17 into threaded bores 18 formed in the spacer 14. Additional set screws 19 are having holes 10 through passed through the outer ends of the plates 15 into the spacer. An operating lever 20 has an end threaded at 21 into the front side of the spacer 14, and a ratchet control plate 22-, having the inturned pawl engagingfingers 22a, is pivotally mounted at the front of the spacer 14 overthe end of the lever 20, which plate, the latter being held against lateral displacement by a nut 23 and set screw 24. Two pairs of oppositely arranged pawls 25-26 are loosely pinned at- 27 to the inner faces of the side plates 8, the inturnedmargins 9 of which are cut out as shown at 28 to permit the free play of said pawls as well as to permit access thereto. The inner ends of the pawls are adapted to shiftingly engage the ratchets 7 at either side, while outer ends are freely disposed within the fingers 22a. braced between the pawls so as normally tend to throw them into. engagement with the ratchets, but by shifting the control plate 22 either up or down, thefingers 22m at passes freely through said Expans on springs 29. are

either end will operate to force a lower pawl 25.,at one side out of-gengagement with-its ratchet, and simultaneously'an upper pawl 26 at the opposite side out of engagement withflits ratchet. The springs ,29-are enclosed within tubular guides or sleeves 42 and at their ends enter seats or sockets 43 formed in the pawls. Thus an upper pawl 26 at the first side and a lower pawl 25 at the opposite side will remain in engagement with their respective ratchets. Under this arrangement, it is obvious that oscillation of the lever 20 in a plane passing through the axis of the handle bar 1 will result in the continuous rotation of the ratchets 7 and connected gears 6 in thesame direction, since the pawls alternately engage their ratchets at top and bottom on opposite sides of the gear assembly. A lock screw .30 is threadedly passed through the plate 22 and the inner end slidably engages a series of corrulhwhereby the. latter is yieldingly retained in any adjusted position. A look nut 32 may be provided for the screw :30. A-connecting bevel ring gear or chuck gear 33, having .a sleeve 84 exteriorly threaded at 35, is rotatably mounted upon the lower end of the handle bar 1 in mesh with the gears .6, and a pair of interiorly threaded ring-like ball races 85. t'hreadedly engaging the threaded end of the bar land lockingly turned against one another, serve to lock the gear 33 to the bar. Ball bearings .86 are interposed between the sleeve'iSd-and the upper ball race 35'. -A chuck assembly .37 of conventional form, is provided ati'ts upper end with a rigidly connected socket V3.8 interiorly threaded and 'monnted upon the sleeve 34, with a ball bearing 3.9 interposed between the bottom .of the socket and the lower ball race 35. A set screw 40 serves to. lock the assembly together. Thus the chuck 37 will freely rotate under the rotation of the gears 6. adjnsti-ngthe rings .35 and jamming them together, and adjusting the socket relative to the sleeve 34, the chuck will smoothly rotate relative to the stationary handle bar '1.

Itis thought the use and operation of the tool will be fully understood from the foregoing description.

' Thile I have herein described a certain specific manner and method of constructing and assembling the elements of my invention, it is understood that I may vary from the same in minor details, not departing from the spiritof my invention, so as best to construct a practical device for the purpose intended, as defined in the appended claims; 7 V V 1.6131111: p 1. In a tool of the kind described, a handle bar, a chuck assembly journaled at one end of the handle bar, a beveled chuck gear con nected to: the chuck assembly and journaled on the handle bar,. a gear shaft extended diametrically through the; handle bar above the chuck gear, beveled gears journaledon the gear shaft; on opposite sides Lof-the handle ations 31 formed in the face of the spacer bar and meshing with the chuck gear, ratchet gears on the outer sides of the bevel gears, side plates journaled on the ends of the gear shaft outwardly of the said ratchet gears, a spacer, side plates on the spacer extended within and connected to the said side plates in spaced relationship therewith, an operating lever secured to the spacer, two pairs of, oppositely arranged pawls fulcrumed on the inner sides of the outer side plates the said pawls being adapted to engage the ratchet gears at their inner ends, expansion coil springs braced between the outer ends of each pair of pawls and adapted to normally hold the inner ends of the pawls in engagement with the ratch t gears,

a ratchet control plate journaled on the operating lever alongside the spacer, fingers turned inwardly from the edges of the ratchet control plate and adapted to engage the outer ends of the pawls, and means for securing the ratchet control plate in an adjusted position. v

2. In a tool of the kind described, in combination with a pair of spaced beveled gears journaled .on a gear shaft and driving a chuck assembly, ratchet gears carried by the beveled gears, side plates journaled on the gear shaft, a spacer secured between the out. er ends of the side plates, an operating lever extended from the spacer, a pair of pawls fulcrumed on each side plate and adapted to engage the ratchet gears upon opposite sides, expansion coil springs braced between the outer ends of the pawls and adapted to 109 RALPH E, DORMAN.

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