US1900017A - Apparatus for disconnecting threaded members - Google Patents

Description

March 7, 1933. 3 KENNEDY 1,900,017

APPARATUS FOR DI SCONNECTING THREADED MEMBERS Filed Jan. 31, 1931 IN-VEN TOR.

1.35 Fig. 2 is a plan view thereof;

Fig. 3 is a detail sectional view showlng' Patented Mar. 7, 1933 1 UNITED STATES GRAFTON sQKENNEDY, or DAYTON, OHIO APPARATUSFOR DI SCONNECTI NG TI E-I READED MEMBERS Application filed. January 31, 1931 Serial No. 512,716.

(GRANTED UNDER rm; Aer or marten a, 1's83,AsA MENDEn APRIL so; 1928; 370 o. e. 757) The invention described herein may-be manufactured and used by or for the overnment for governmental purposes, without the payment to me of any royalty thereon.

This invention relates to an apparatus for disconnecting threaded members and has reference more particularly to an arrangement which permlts operation from a remote point.

7 The removal of a booster casingfrom a loaded projectile is a task fraught w th danger and consequently is carried out by placing the operator and the pro ectile on opposite sides of a strong protective wall. The present apparatus designed to accomplish 215 this task is characterized by a novel arrangement for initiating rotation of the wrench, or by a special head adapted tov hold the member that is unthreaded and by a carriage for retracting the projectile.

With the foregoing and other objects in i the invention resides in the novel arwhich the pedestals .11 are supported.

view, rangement and comblnation 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.

A practical embodiment of the invention 1s illustrated in the accompanying drawing, v

wherein:

I Fig. 1 is a longitudinal sectional view of the apparatus constructed in accordance with the invention;

the adapter and holder in place on the projectile.

Fig. 4 is a detailed sectional view of the ratchet mechanism.

Referring to the drawing by charactersof reference:

The apparatus consists essentially of a horizontally disposed wrench in the form. of a shaft 5 which is inserted through a protecting wall 6 whereby the handle portion 7 I and the head 8 are on opposite sides of the wall. The shaft has a plurality of supports, one of them consisting of a bearing sleeve 9 '50 retained in the wall by plates 10-10 that are *justably supporting bearin .handwhee1 D wheel 24:

connected by tie rods lland the remaining ber 13 provided'with set screws 14: for adblocks 15. A p 16 is mounted on the shaft 5 between the pedestals and is secured by the set screw 17.

' 'On the reduced extremity 18 of the handle portion 7 there is rotatably mounted a'lever 19 having a counterweight 20 wherebythe lever is normally maintained in anupright position. The lever is formed with a tubular portion 21 in which is housed a pawl 22 normally urged by a spring 23 to engage a ratchet fast on the handle portion of the shaft 5.. A laterally. projectingfinger 25 on a the pawl 22 is disposed in the path of a cam surface 26 on the upper extremity of a bar 27 which is secured by'means of bolts 28 to a 'Ilgld. base which may be the bed 29 .on

The headv8 of the wrench is in the form of'a pair of spaced jaws 30 parallel to the axis of the shaft 5 and designed to receive an adapter31 which is secured in place by a set screw 32. The engaging portions of the adapter are designed to be a complement to the particular type of bolt head to be engaged.

In the example given the member 33that' is to be unthreaded is formed with a conical head 34: having notches or slots 35. As clearly shown in Fig. 3, the adapter'31 is formed to fit overthe head 34 and is provided with te5ethv or blades 36 for engaging inthe slots 7 Where the member 33 is hollow and internally threaded, a holder 37 is associated with the adapter 31 and is in the form of a collar bolt, the stem of which is threaded into the member 33 after the adapter 31 has been fitted thereon so that the collar 38 rests against the adapter and serves to hold the adapter in place on the member 33 during the operation of moving the assembled units into a position with respect to. the head of' the wrench whereby the jaws embrace the adapter and the set screw 32 may engage it.

' The objectfrom which the member 33 is to be removed, in the present instance a protheadapter and wrench head and having 'securable to the wrench means for externally engaging a member to jectile 39, is clamped in a vise 40 fixed to a carriage 41 which is arranged to ride on a series of spaced rollers 42. A flexible cable 43 having a hook 44 engageable with an eye 45 onthecarriage is passed. between. adjacent rollers at. apoint where it is desired to arrest movement of the carriage. A weight 46 on the rope serves as a gravity actuator normally tending to move. the carriage. The movement of the carriage is arrested by disconnecting the hook therefrom and this is accomplished by the rotary motion. imparted to the hook when it passes over the roller 47 as-clearly shown in dotted lines in. Fig. 2..

The method of employingthe apparatusi's asfollows The adapterBl is fitted; onithemember. 3.3 andzthe. holder .37 threaded thereinto hold. the adapter in place., The projectile 39 is. then clamped; in. the vise 40- and; the carriage 41 moved towards the protecting wall until the holder 37 contacts-theheadv of the wrench between the jaws 30. The set screw 32 is. then turned. to engage the adapter and the collar 38 of the holder.

The hand wheel 1.61is then. turned: to; rotate the shaft 5 and unthread. the member 33 from the projectile which is free to move away from; the wrench. and permit the withdrawal of the member 33-. When the last thread is disengaged the carriage moves to. the position shown in dotted linesin. Fig. 2v and the member 33' is supported by the wrench; being removed by loosening the set screw 32:

Frequently the leverage afforded by the hand: wheel 1'6'is insufficient to initiate unthreading. In this event the lever 19 is'act'ed on. and? as soon as the finger 25. clears the cam surface 26 the pawl 22 is urged by its spring into engagement with theratchet wheel 24, which. being fast on the shaft 5, thusimparts rotation to. the shaft. Upon release of the lever the counterweight20 returns the lever tov the upright position where the cam 26 is in position to disengage. the pawl from the ratchet wheel. v

I claim:

1'. In apparatus of the class described, a Wall, a'shaft passing through the wall, a hand wheel on. one end of the shaft, a wrench. head on the other end of the shaft and including spaced jaws parallel to the shaft,

head and having be unthreaded, a holder confined between means for internally engaging a member to be unthread'ed, a work-holding carriage, a series of rollers forming a support for the carriage, and a gravity actuator including a'fiexible cable passing over one of the rollers and a hook carried by the cable for detachably engaging the carriage.

2. In apparatus of the classdescribed, a shaft. means for mounting the shaft, a

an adapter wrench head on one end of the shaft, a handwheel on the other end of the shaft, a ratchet wheel on the shaft adjacent the handwheel, a counterbalanced lever journaled on the shaft adjacent the ratchet wheel, a. spring pressed pawl housed in the leverand normally urged to engage the ratchet wheel, and a cam for withdrawing the pawl when the lever isin. normal counterbalanced position.

3. In apparatus of the class described, a carriage, means onthe-carriage for holding a piece. of work, a series of rollers forming a support for the carriage, and a gravity actuator including a flexible cable, passing over one ofthe rollers and a hooli carried by the GRAETQN S.,

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