US1501249A - Manipulating device for springs - Google Patents

Description

July 15", 1924.

N. SULENTIC MANIPULATING DEVICE FOR srames Filed March 22. 1923 gwuentm:

JYL'choZas 5a Zenti a,

?atented July 15, 1924.

NICHOLAS SULENTIC, OF WATERLOO, IOWA.

MANIPULATING DEVICE FOR SPRINGS.

- Application filed Mai-ch22, 1923.

T 0 all whom it mag concern:

Be it known that I, lliononas SULnNTIo, a citizen of the Republic of Austria, and a resident of Vi aterloo, Blackhawk County, Iowa, have invented certain new and useful Improvements in Manipulating Devices for Springs, of which the following is a specifi cation.

My invention relates to improvementsin manipulating devices for springs, and the object of my improvements is to furnish means conveniently associated and combined adapted for use in first compressing and then removing a. coiled compression spring from a valve-stem, then re-compressing the sprin and lastly replacing the spring on the valve-stem and securing it thereon.

This object I have accomplished by the means which are hereinafter described and claimed, and .which are illustrated in the accompanying drawings, in which Fig. 1 is an elevation of my improved combination spring remover and compressor, as employed in the first part of the operation in the removal of a coiled spring from a valve-stem; Fig. 2 is a fragmental elevation of the associated compressor for compressing the spring after removal; Fig. 3 is a fragmental plan view of the elastic jaw members of the lower one of the pair of spring remover jaws, and Fig. 4 is a perspective View of the elastic clip device employed to receive the spring from the compressor jaws and replace it on said valve-stem.

The combination spring compressor has a flat rack-bar 1 provided along one longitudinal edge with the rack-teeth 2. This bar 1 at one end is turned at a right angle to provide a jaw shank 3. The numeral 4 denotes a pair of like but reversed forkmembers secured by means of rivets 5 to opposite faces of said shank 3. The free ends of the jaw fork-members 4 are shaped into outwardly curved clips 6 whose tips 7 are bent outwardly, said clips being elastic and having along their lower edges the shelving or flanged projections 8 in the same transverse plane.

The numeral 9 denotes a housing having a longitudinal slideway passage therethrough to slidably receive the rack-bar 1. In said housing is rotatably mounted a shaft 11 carrying a spur-pinion 1O meshing with the teeth 2 of said rack-bar 1, and a handled crank 12 is mounted on an outwardly pro- Serial No. 626,989.

jecting end of said shaft to manually rotate the pinion to slide the housing to and fro along the rack-bar, a pawl 15 being pivoted at 14 on the housing to engage said teeth, and being resiliently controlled by a light bar-spring 16, within an opening 13.

The housing has a member or shank 17 which projects in parallel with the shank 3, the shank 17 having its outer part bent downwardly to provide an integral finger 18 in line with the center of the bifurcated clips 6.

On the rack-bar 1 near its angular connection with said shank 3 is a projecting part or jaw which diminishes in width outwardly and carries on its opposite sides the oppositely directed projections 21, and the middle of the latter and of said jaw are shaped into a cross-shaped and diminished part 31. On the housing 9 is a projecting jaw 19 of the same shape as the jaw 20 but reversed and alined with the latter.

The numeral 28 denotes a small clamping device made from a piece of elastic sheet metal. This piece is suitably cut out to have like end members 29 terminally bifurcated at 30, these end members being bent at right angles in the same direction from a medial part 28, and the latter is preferably narrower than these end members, to render the device more elastic in the bending of the members at their angles.

In said Fig. 1 is shown in cross section a portion of a cylinder-head 22 of an internal combustion engine provided with a valve-seat to seat a valve 23, the latter having a stem 24 which projects downwardly through a bearing opening and has a coiled compression spring 25 thereon retained by a removable pin 27. When it becomes necessary to remove the valve in order to repair it or re-grind the valve-seat, my device may be used as follows. The resilient clips 6 are passed about the lower part of the spring 25 with the washer 26 seated on the inturned flanges 8. The crank 12 is rotated to shift the housing downwardly to engage the finger 18 with the center of the top of the valve, and continued use of the crank causes the spring 25 to become "compressed and lifted upwardly away from the pin 27 which may be then easily removed, so that when the jaws are separated by a reverse rotation of said crank, the device may be taken away, and then the valve removed.

The spring may be replaced as follows. It isplaced between the other pair of jaws 19 and 20, the latter brought toward each other to engage and compress the spring. The clamping device shown in Fig. 4 is then used to receive and carry the compressed spring by slipping its bifurcated members 29*30 over opposite ends of the spring and then releasing the jaws l9 and 20. The spring is carried to and slipped over the replaced valve-stem 24:, the pin 27 re-inserted in the stem, and the clamping device 28 then removed, the reacting released spring returning the valve 23 to its seat. 7

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is:

1. In a device of the character described, a rack-bar having rack-teeth and having a jaw-projection, a boxing slidable to and fro along said rack-bar and having a jaw-projection opposed to and cooperative with the first-mentioned jaw-projection, a pinion meshing with said rack-teeth and rotatably mounted on'said boxing, and a pawl pivot-- ally mounted on said boxing, resilientlycontrolled, and meshing yieldingly with said rack-teeth, said aws being shaped with :facing diminished alined projections to adjustingly centera coiled spring therebetween.

2. In a device of the character described, a rigid body having a jaw thereon formed with a diminished cruciform detent, and another body slidably adjustably mounted on the first-mentioned body and having a like jaw thereon with a diminished cruciform detent, said detents being in alinement.

Signed at Waterloo, Iowa, this 20th day of February, 1923.

NICHOLAS SULENTIC.

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