US1448428A - Socket wrench - Google Patents

Description

Man. 13; 1923. 1,448,428

. 1.. J. BOWMAN SOCKET WRENCH Filed Nov. 29, 1921 5 sheets-sheet 1 I gwuentoz,

Mar. 13,1923.

L. J. BOWMAN SOCKET WRENCH Filed Nov. 29, 1921 5 sheets-sheet 2 gm newton Mar. 13, 1923. 1,448,428

L. J. BOWMAN Y SOCKET WRENCH Filed Nov. 29, 1921 5 sheets-sheet 5 61201: new

Patented Mar. 13, 1923.

UNITED STATES LESTEB'J'. BOWMAN, 0F ELKTOIL OBEGON;

SOCKET WRENCH.

Application filed November 29, 1921. Serial No. 518,634.

To all whom it may concern Be it known that I, Lns'rnn J. BOWMAN, a citizen of the United States, residing at Elkton, in the county of Douglas and State of Oregon, have invented a new and useful Socket WVrench, of which the following is a specification.

This invention relates to wrenches or the like, the primary object of the invention being to, provide a motor-driven wrench having a movable support to permit the wrench to be operated with facility.

Another object of the invention is to pro-.

vide a device of this character having an adjustable shank, to permit'the wrench to be employed. in various locations.

A still further object of the invention is to provide a novel form of clutch mechanism, whereby the tool may be thrown into and out of operation at the will of the operator.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, may be made within the scope of what is claimed, without departing from the spirit of the invention.

Referring to the drawings Figure 1 is a side elevational view of a wrench and its support.

Figure 2 is an elevational view of the wrench and motor housing, one of the side walls of the motor housing being removed. Figure 3 is a sectional view taken on line 33 of Figure 2.

Figure 4 is a sectional view taken on line 7 44 of Figure 2.

Figure 5 is a fragmentaldetail view of the adjustable shank. a portion thereof being broken away to illustrate the connection between the sections of the shank.

Figure 6 is a plan view of the device.

Figure 7 is a detail view partly in section, of one of the clutch elements.

Referring to the drawings in detail, the reference character 5 indicates the swinging support, which is formed of a pair of diverging arms 6 pivotally connected to the bracket 7, as through the medium of the pin 8, whereby the support may be swung in a horizontal plane, to various positions.

The rod 8' has its upper end anchored to a suitable supporting wall'as by means of the eye bolt 9, they opposite end of the rod having connection with the support 5 as through the medium of the eye bolt 10, which has connection with the support at a point adjacent to the outer end thereof.

Connecting the arms 6 at their outer ends, is a shaft 11 on which is keyed or otherwise secured the pulley 12 over which operates the flexible supporting cable 13, which also moves over the pulley 14. The pulley 14 is also mounted on the support 5 adjacent to the pivoted end of the support so that the weight 15 mounted at one end of the supporting cable 13 may hang adjacent to the supporting wall, to which the device is secured.

On the outer end of the cable 13 is secured the wrench proper which embodies a motor housing 16 formed preferably in sections, so that one section may be removed to view the working parts of the wrench.

Supported within the housing 16 is a motor 17 which is in circuit with a suitable source of electric supply as through the wires 18, there being provided a switch member 19 by means of which the rotation of the motor may be controlled at the will of the operator. the. motor shaft, which pinion is constantly in mesh with a gear 21 mounted on the shaft 22 which operates in the bearing 23. A pinion 24 is mounted on oneend of .the

A pinion. 20 is mounted on shaft 22 and mesheswith the gear 25 carried at one end of the shaft 26. which also carries the section 27 of the clutch mechanism. The housing is formed with an elongated bearing member 28 which supports the tubular member29 forming a part of the wrench shaft. The tubular member 29 is secured to the shaft 30, which shaft operates in the bearing 31 and carries the movable section 32 of the clutch mechanism. A switch controlling arm 33 is pivotally supported within the housing as at 34 and has one end thereof contacting with a portion of the clutch mechanism 32, whereby movement of the arm 33 results in a relative movement of theclutch section 32 to move the same into and out of engagement with the clutch member 27 to accomplish the rotation of the wrench.

Connected with the arm 33 is a clutch actuating member 35 which extends downwhereby the operator may conveniently move the clutch mechanism into and out of operation. A coiled spring 36 has connection with the arm 33 to normally urge the arm in a direction to disconnect the clutch sections.

Supported within the tubular member 29 is a tubular section 37 which is formed with a squared bore to accommodate the squared head 38 formed on one end of the shaft 39 that carries one section of the universal joint 40. The wrench proper is of the socket type as indicated at 41, the socket beingformed on the lower end of the rod 42 which has connection with the rod 39, as through the universal joint 40.

As shown more clearly by Figure 7 ot the drawing, the movable clutch member embodies a disk-like structure formed with a plurality of openings to accommodate the removable containers 43, which are threaded as at as. Within each of these removable containers 4:3 is a coiled spring 45 which encircles the rod 46 that has connection with a clutch element 4-.7, which may be formed of leather or other suitable material, the clutch elements 47 being movable within the containers, due to the construction as set forth.

In order that the wrench housing may be moved with "facility, a drum 48 is mounted on theshaft 11 on which drum operates the cable 49, the drum being also secured to the shaft 11 so that when the cable is movech over the pulley, the shaft will be rotated. to cause the wrench to be raised and lowered.

Associated with the drum 48 is a pivoted arm 50 which carries an extension 51 provided with a brake shoe 52 on one end thereof, the brake shoe being designed to engage one surface of the drum to hold the same against movement. A coiled spring 53 has connect-ion with the arm 50 and also has connection with the support 5 to normally urge the shoe 52 towards the drum. Carried at the outer end of the arm 50 is a pulley 5% over which the cable 49 passes, so that when the cable 4-9 is p-ullech the brake shoe 52 will be moved out of engagement with the drum 48 to permit rotation thereof for accomplishing the adjustment of the wrench proper.

In the use of the device, the motor 17 is placed in operation, which results in the movement of the clutch member 27. The member 35 is now operated to move the movablese'ction 32 of the clutch into contact with the clutch member 27 to impart rotary movement to the wrench proper.

From the foregoing it will be seen that due to the construction as shown and described, the wrench may be moved to various a positions to accomplish the seating of a nut or the like, the connection between the clutch members being such that the clutch members will slip when the nut under operation has been properly seated, thereby eliminating}; any possibility of the nut stripping the threads of the bolt to which the nut is applied.

Having thus described the invention, what is claimed as new is A motor-driven wrench including an adjustable support, a shaft mounted at the outer end of the support a pulley on the shaft, a drum on the shaft a brake arm carrying a brake shoe adapted to engage one end of the drum to control the movements of the drum and shaft a motor housing a cable moving over the pulley and adapted to support the motor housing, a motor within the housing, a socket wrench. supported by the housing, means for connectingthe socket wrench and motor, a flexible member wound on said drum andcontactingz with the brake arm. said flexible member adapted to move the brake arm to disengage the brake shoe and drum, when said flexible member is moved in one direction.

In testimony that I claim the foregoing as my own, I have hereto atfiized my signature in the presence of two witnesses.

LESTER J. BOWMAN.

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