US1835135A

US1835135A - Scbew and nut turning device

Info

Publication number: US1835135A
Application number: US348323A
Authority: US
Inventors: Frederic E Bertrand
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1929-03-19
Filing date: 1929-03-19
Publication date: 1931-12-08
Anticipated expiration: 1948-12-08

Description

Dec. 8, 1931. F. E; BERTRAND SCREW AND NUT TURNING DEVICE Filed March 19,l 1929 /NVENTUR Patented Dec. 8, 1931 UNITED STATES PATENT OFFICE FREDERIC E. BERTRAND, F LYNN, MASSACHUSETTS, ASSIG-NOR TO UNITED SHOE MACHINERY' GOBPOBA-TION, OF PATEBSON, NEW JERSEY, A CORPORATIQN OF'NEW JERSEY SCREW AND NUT TURNING DEVICE Application led March 19, 1929. Serial No. 348,323.

This invention relates to screw and nut turnin devices and is herein illustrated as embodied in a tool adapted to drive a heel fastening of the type disclosed in my copending application Serial No. 288,620, filed June 27, 1928.

For the purposes of the present disclosure it is sufficient to say that a'fastening of the kind referred to comprises a screw, adapted to be driven into a heel held against the heel seat of a lasted shoe, and a nut threaded upon the shank of the screw and arranged to be screwed down into en agement with the top of a last in the shoe a er the screw is driven l into the heel.

It is an object of the present invention to 'i provide improved means for turning the screw and the nut, independently, in one operation.

With this object in view, an important feature of the invention consists in the combination of a screw driver and a wrench mounted I concentrically, both tools being normally driven by a rotating power shaft, and special g5 connections being provided between the screw driver and the shaft to permit operation of the screw driver to cease, after the screw is driven home, while operation of the wrench continues, to drive the nut home.

Inasmuch as the nut must progress axially along the screw when the nut is driven home after rotation of the screw has ceased, the invention further provides, in combination, a reciprocable screw driver and a nutturning Wrench which is reciprocable both with the screw driver and independently thereof. In a convenient form of the invention the screw driver may be arranged within the wrench, being normally substantially Hush therewith but readily retractable and both the screw driver and the wrench being connected to the power shaft by yieldable clutches which permit-the required relative movements and independent operations of the two tools. Y

The fore oing and other features of the invention and the benefits to be derived from its use will be better understood and appreciated from the following detailed description of a practical embodiment thereof when read in connection with the accompanyingl drawings, in which Figure 1 is a view in front elevation, with parts shown in section, of a tool embodying the invention;

Fig. 2 is a perspective view of the wrench driving clutch disassembled; and

\ Fig. 3 is a similar view of the screw driving clutch.

In Fig. 1 of the drawings 10 indicates a rotate freely within a cylindrical handle 24 in which the said shank portion of the wrench is journaled, relative longitudinal movement of the handle and the wrench being prevented by a cap 26 screwed upon the upper end of the wrench shank, and a collar 28 secured to the wrench shank by -a set screw 30, thrust washers 32, 34 being interposed between the ends of the handle and the cap 26 and collar 28 respectively.

The handle 24 is adapted to be grasped by the operator, and power to rotate the wrench 18 is derived from a rotating power shaft 36 which may be driven in any suitable way as, for example, by the screw driving shaft of a machine such as that disclosed in United States Letters Patent No. 1,7 22,992, granted August 6, 1929, upon .my application Serial No. 54,046, filed sept. 2, 1925.

The power transmitting connections between the shaft 36 and the wrench 18 coluprise the clutch illustrated in Fig. 2. The

driving element 38 of this clutch consists of a sleeve surrounding the shaft 36 and pre- Vented from rotation relative thereto by the co-operntion of flat faces 40 formed upon the shaft with similar flat faces 42 formed upon the interior of the sleeve. The lower ends of the clutch driving element 38 is formed with a series of teeth 44 arranged to engage 1n notches 46 in the upper end of the driven element 48 of the clutch. 'Ihe driven element 48 also comprises a sleeve surrounding the power shaft 36 and has projecting from lts side a spline 50 which is slidable longitudinally in a slot 52 formed in the wall of the wrench shank 22.

It will now be apparent that rotation of the power shaft 36 will be transmitted to the wrench shank 22, and the wrench 18, by the

clutch members

38, 48 as long as the teeth 44 are engaged in the notches 46. This engagement is effected and controlled by a longitudinally expansive spring 54, bearing against the lower end of the clutch member 48, to which spring further reference will presently be made.

A screw driver head 56, formed for driving engagement with the head 12 of the screw, is mounted within, and concentrically with, the wrench, the screw driver head being freely rotatable within the shank portion of the wrench and freely movable longitudinally thereof.

Power to rotate the screw driver 56 is derived from the power shaft 36 by the agency of connections comprising the screw driving clutch illustrated in Fig. 3, wherein 58 designates the driving element and 60 the driven element. The clutch driving element 58 consists of a sleeve surrounding the shaft 36 and movable longitudinally thereof but prevented from rotation relative thereto by the co-operation of a key 62, secured in the shaft, with a slot 64 formed in the interior of the sleeve 58.

The lower end of the clutch driving element 58 is provided with notches 66 which co-operate with teeth 68 projecting from the upper end of the driven element 60 of the clutch which also consists of a sleeve surrounding the lower end of the shaft 36. The

' clutch element 60 is rotatable relatively to the shaft 36 but is prevented from longitudinal movement relative thereto by a shoulder 70 formed upon the shaft and the enlarged head 72 of a retaining screw threaded into the end of the shaft, between which shoulder and screw head a reduced portion 74 of the clutch member 60 fits. The screw driver head56 is screwed into the lower end of the driven element 60 of the clutch, which' and the wrench may be rotated at the same time or either may be rotated independently of the other, it being understood that the power shaft 36 rotates continuously.

The teeth 44, 68 and the notches 46, 66 are so formed that each clutch will transmit, without slipping, suiiicient power to drive the screw and nut, respectively7 but will yield and slip as soon as the screw and nut are driven home in order that damage or breakage may be avoided. v

In order topermit reciprocation of the screw driver and the wrench, both together and independently, the power shaft 36, upon the lower end of which the screw driver is supported, is arranged to slide axially through a bearing 78 in the cap 26 which is screwed upon the upper end of the wrench shank 22. A loose sleeve 80 surrounds the shaft 36 adjacent to the cap 26, and the upper end of a rather light expansive spring 82 bears against the lower end of said sleeve. The lower end of the spring 82 bears against a collar 84 secured to the shaft 36, the tendency of the spring 82 being to project the shaft downward until the screw driver head 56 is about flush with the wrenchr 20. The spring 82, however, yields suliciently easily to permit the wrench to be moved downward after the screw being driven by the screw driver has encountered enough resistance to cease turning and, consequently, has ceased to move downward.,

In the use of the device the power shaft 36 rotates continuously. The handle 24 is grasped by the operator and the screw driver head 56 is engaged with the head of the screw, which will be driven home, whereupon the

screw driving clutch

58, 60 will yield and slip. Continued downward pressure upon the handle will cause the wrench 18 to be projected further downward, the wrench engaging and turnin the nut 16, causing it to progress axially a ong the screw until the nut is firmly seated against the work, whereupon the wrench driving clutch 38 48 will also yield and slip. At this time both the screw andnut are driven home and, upon withdrawal of the tool, the spring 82 projects the screw driver to its original, normal position ready for operation upon the next screw.

Having described the invention, what is claimed as new and desired to be secured by Letters Patent is:

1. In a screw and nut driving device, the Combination of a rotating power shaft, a screw driver. and a wrench concentric with each other and both normally driven by said shaft, and connections between the screw driver and the shaft permitting operation of the screw driver to cease while operation of the wrench continues.

2. In a screw and nut driving device, the

screwdriver and a wrench both mounted concentrically with said shaft and both normally driven by the shaft, and connections between the screw driver and the shaft permitting operation of the screw driver to cease while operation of the wrench continues.

3. In a screw and nut driving device, the combination of a rotating power shaft, a screw driver and a wrench concentric with each other, and individual clutches connecting the screw driver and wrench res ectively to said shaft, said clutches being a apted toyield and slip independently of each other, whereby both a screw and a nut upon the screw may be driven home independently in one operation. y

'4. In a screw and nut driving device, the combination of a rotating power shaft, a screw driver, a wrench, two clutches, the driving element of each clutch being constrained to rotate with the power shaft and the driven elements ofthe clutches transmitting force respectively to the screw driver and the wrench, and a spring common to both clutches for pressing their driving and driven elements into driving engagement with each other.

5. In a screw and nut drivin device, the combination of a hollow hand e, a wrench mounted to rotate in the handle, a screw driver mounted to rotate within the wrench, a power shaft mounted to rotate within the wrench relatively to the screw driver, both the screw driver and the shaft being axially movable relatively to the wrench, and clutches connecting the shaft to the wrench and the screw driver, respectively.

6. In a screw and nut driving device, the

combination of a hollow handle, a wrench mounted to rotate in the handle, a screw driver mounted to rotate within the wrench, a power shaft mounted to rotate within the wrench relatively to the screw driver, both the screw driver and the shaft being axiall mov able relatively to the wrench, and ciitches connecting the shaft to the wrench and the screw driver, respectively, an element of one clutch being 'splined to the shaft and an element of another clutch being splined to the wrench.

In testimony whereof I have signed my name to this s ecification.

FREERIC E. BERTRAND.