US1873250A - Bushing extractor - Google Patents

Description

Aug. 23, 1932. w J, ADOLPH 1,873,250

BUSHING EXTRACTOR Filed'Jan. 5, 1929 26 1 FIG. 3

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ATTORNEY Patented 23, 1932 UNITED STATES WALTER .1. ADOLPH, or BROOKLYN, NEW YO K; ASSIGNOR'TOBELL mmrndm'ntt- ORATORIES, INCORPORATED, on NEW YoR N. Y., A coRroRA'noN or NnwYoRK u f BUSHING Ex'rRA c'ro I Application filed January 5, 1929. Serial No. 330,444.

This invention relates to extracting tools and has particular reference to a type of extracting tool which is well adapted for use for extracting sleeves or bushings from their 1 supports.

In telephone switchboards, for example, a relatively great number of jack sleeves are mounted in insulating bars which are arranged in superposed rows. Each of these sleeves is secured against movement in its insulating bar by a press fit adjustment or by a pin of relatively small diameter'or both. In such switchboards in order to insure positive contact between the plugs and their associated switching elements, it is necessary that the amount of clearance between the plugs and sleeves be as small as practicable, which necessitates the frequent replacement of the sleeveswhich have been worn out.

By the use of the tool of this invention worn out sleeves or bushings are extracted from their supporting members in a con: venient and simple manner. 7

According to this invention a tap is screwed in the sleeve or bushing to be extracted by turning a handle. A 'counternut on the stem of the tap is provided for locking the jack sleeve with the tap, after which a butterfly nut is screwed against an abutment piece at the end of a tubular shaped shell having prongs which abut against the face of the panel, the continued movement of the butterfly nut being efiective to impart an axial movement to the tap and thereby withdraw the jack sleeve from the panel.

Referring to the drawing Fig. 1 is an assembly view of the extracting tool showing the tap in position inthe bushing;

Fig. 2 is an end view thereof and;

Fig. 3 is an assembly view of the tool showing a number of operating parts partially in section.

In the drawing 10 represents a tubular shaped shell which is provided at one end with prongs 11 and 12 to which are secured as by rivets the insulating block or pads 13 and 14 respectively. In shell 10 there is slidably mounted a sleeve 15 having one of its ends screw-threaded for engagement with a nut screw 16, the sleeve .being held against gagingv a key-way 18 inthe shell 10." Nut screw 16 and the sleeve 15 with which it engages are held in position concentric with respect to shell 10 by a ring portion 19 in tegrallyformedwith the nut screw'16 apin 20 whlch fits a peripheral recess 21 in the'ring portion being provided for'hold'ing "the-nut '16 against axial movement in the shell and a friction washer 22 is interposed between'the 'nut screw 16 and the shell for a*w'ell-' known purpose. v, y p

In sleeve 15 there is rotatably mounted'a spindle 23 provided at one end with a collar 24 abutting against the end of the sleeve '15 and at the other-end with ahandle 25 held securely thereon by a pin 26, a friction washer 27 being interposedbetween the handle 25 andthe nut. 16. The spindle 23 is provided at one end with anaperture'28in' which a tap 29 is mounted and held securely thereon by pins 30 and disposed at right angles to each other as shown in Fig. 3. The stem of tap 29 has a threaded portion 32 on which a knurled nut screw 33 is mounted. The tap 29 is preferably of the right hand I-Iarvey grip type thread and the threadedportion' of the tap'stem of theordinary U. S; standard left hand'thread type. This construction permits locking the bushing'togbe'extracted onto the tap' positively for permitting the back Fig. 1 by turning the handle 25. The counternut 33 is then screwed tight against the bushing for looking it with a tap. Uponthe rotation of butterfly nut screw 16 and due to the fact that this nut screw rests against the rotary movement in the shellby ailiey 17 enend of the tubular shell 10, which has its prongs 11 and 12 in abutment against the support of the bushing, the sleeve 15 is thereby forced to move axially for extractingthe V bushing from its mounting. The insulating pads 13 and 14 are provided for preventing injuries to the bushing supporting member and to prevent the accidental short-circuiting of other switchboard parts with which it may come into contact during the extraction of the bushing from its support.

What is claimed is: 1. In a bushing extractor, a tubular shaped shell, a threaded sleeve slidably mounted in said shell, .a nut engaging the sleeve'andl abutting against the end of said shell, a rod rotatably mounted in said sleeve, a tap carried by said rod, a handle. at-Lthe otheryend of said rod, a threaded portion: formed ad'- ;1

jacent the effective portion of said tap, and a nut engaging said threaded portion-for lock ing thebushing to said tap.

2. In a bushing extractor, a tubular shaped shell having prongs, a nut screw rotatably mounted in said shell, a threaded v sleeve tele- .scopically mounted in. said shell and engaging. said nut screw, a rod rotatably mounted v in said sleeve and having a shoulder'portion abutting. one endiof the sleeve, a tap v secured at one endof said rod, a handle secured at the otherend of the rod andlabutting .thenut screw, the movement of thehandle being effective to cause the engagement ofthe tap withthebushing and the movement of the V a nut screw being effective to engage the prongs of the shell against the support of the bush- I ing, the continued. movement of the nut screw, being efi'ective to impart an axial movement I to the tap'for withdrawingthe bushing from i Q its support.

3. In a bushing extractor,a tubular shaped shell, a peripherally disposed pin carried by sa-id shell, a threaded sleeve telescopically arranged in said shell, a tap rotatably mounted in said sleeve, a handle for turningsai d tap, a rod connecting said tap to said handle, means to-preventrelative axial movement of c said rod and sleeve, a nut threadedly engaging the sleeve and abutting the'shelLjsaid v r v nut having a peripheral groove engaging said 1 pin on said shell, the rotation of said nut Qcausing reciprocation ofthesleevefor moving the tap axially.

In witness whereof, I hereunto subscribe V i my; name this. 31st day of December, 1928.] WALTER ADOLPH,

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