US1246969A - Device for compressing springs. - Google Patents

Description

H.. I. MAcKEEVER. =oEv|cE ron comrnsssma srnmes.

"Patented m. 20,1917;

. APPLICATSON FILED NOV. 21' I916- 246 UNITED srarns PATENT OFFICE.

HAmiY I. MAoKEEVER, or SAN rmmcrsoo', oALIroRNIA.

' DEVICE FOR CGMPRESSING SPRINGS.

Application filed November 27, 1916. Serial No. 133,599. I

To all whom it may concern:

Be it known that I, HARRY I. MAoKEEvnR, a citizen of the United States, and a resident of the cit and county of San Francisco, State of alifornia, have made a new and useful invention-to wit, Device for Compressing Springs; and I do hereby declare the following to be a full, clear, concise, and

exact description thereof.

The invention is'a device for compressing springs and is particularly designed for conveniently compressing and placing the springs around the stems of gas engine valves, to mount the valves, and for compressing said springs to remove the spring abutments on the stems in order to remove the valves.

-In this specification and the annexed drawing I illustrate the invention in the form which I consider the best, but it is to be understood that I do not limit myself to such form because the'said invention may be embodied in other forms, and it is also to be understood that I intend to cover the invention in whatever form it may be embodied within the scope and spirit, of the claims following the description herein.

Referring to the drawing: Figure 1 is a side view of the device shown in the act of compressing a gas engine valve spring on the valve stem.

' Fig. 2 is an enlarged side view of the device. v

Fig. 3 is a front elevation thereof.

Fig. 4 is a view of the device showing it in the act of compressing and placing a gas engine valve in position around the valve spring.

Fig. '5 is a detail view of the end of th lowerarm of the device.

The device is formed with a u shaped frame 1 having two arms 2 and 3 and their connecting member 4. The .arm 2 has a fork 5 at its extremity adapted to surround a rod such as the stem of a gas engine valve. A bearing 6 is provided at the extremity of the arm 3 in which is slidably mounted a plunger 7, one end 'of' which extends below the arm 3 in alinement with the center of the fork 5. An operating lever 8 is pivoted at 9 to the upper end of the hearing 6 at the-side of the axis of the plunger toward the frame members 4, to which lever the upper end of a link 10 is pivoted at 11.

The plunger 7iis provided with a series of holes 12 which register with a slot 13 in said Specification of Letters Patent.

Patented Nov. 20, 1917.

' quire. On the upper face of the arm' 2 rests a bracket 16 having side flanges 17 which engage the side faces of said arm and hold the bracket in sliding alinement with the arm. A presser foot 18 is provided on the outer end of said bracket which is'adapted to engage the lower end of a spring or the I spring abutment at said end of the spring.

A screw 19 having a butterfly head 20, extends through a slot 21 in the upper wall of tlwfibracket 16 and screws into the arm 2 so that said head engages said upper wall of the bracket, wherchv the bracket is adjnstably secured to said arm. Upon loosening said screw the bracket may be moved along the arm 2 and the presser foot 18 adjusted to the proper position with relation to the crotch of the fork 5, so that upon securing the bracket in such position by the screw, said presser foot may engage the spring abutmen collar on the valve stem and hold. the crotch of the fork slightly away from the valve stem.

In order to explain the operation of the inventionas clearly as possible that part of.

a gas engine including the valve mechanism 96 is illustrated in Figs. 1 and 4. in which figures 30 indicates the valve casing of the engine; 31 a valve; 32 the Valve stem; 33 the valve spring surrounding the stem; 34 the spring abutment collar on the stem abutting the lower end of the spring: 35 the pin extending through the stem for holding the abutment collar in position on the rod against the spring; 36 the cam plunger for engaging'the lower end of the valve stem to actuate the valve; and 37 the hearing on the engine in which the cam plunger operates. The operation of the invention is as fol 'lows When it is desired to remove the valve from its operative position on the engine, the cap inclosing the opening in the valve casing above the valve is first removed; the device is then placed in the position shown in Fig. 1 with the plunger; 7v raised by lever 8 and projecting through said valve casing opening and engaging the top of the valve oil word to the side of 31 in the center thereof, on 5 surroundveg the lov stem 32 end engegi said abutment collar engaging the edge oft s: o color 1111f. h the crotch of the fork slightly e the valve stem so that crotcn will rub against the and create The lever 8 then sw g down of ng which operation the distance between the lever pivot 9 and the l. lr end plnngei pivot 14 increases, which senses the phwejer i to press upon the valve and ni s t e no opposite to the side pivoted, thus locking the plunger in its lowermost position and the deuce in its spring compressing position with the shutment collar above the pin 35. The pin is then driven out of the valve stem The level 8 is then lifted which allows the frame it t descend and the spring 33 to expand The device is then removed and the valve is removed through the opening in the top of the valve casing.

Considerable diiiiculty has enced in placing the valve spring; in position owing to the fact that when its length is greater than. the distance the valve casing and the cam plun r been ing 37. The upper end of the spri must be placed against the lower well oi" t e velve casing to permit the valve stem to sorted therein in which position l end of the spring bends outward it past the top of the cam plunger h It is very difficult to compress the spring and bend it straight by hand to pet the abutment collar in "position on valve stem. The difiicnlty is overcome Icy In ivent-ion as follows: The upper end the spring 33 is first placed egains he lower wall of the valve casing; the valve stein and valve 31 are then introduced on gh the opening in the top of the valve casing end the valve stem inserted into he the plunger 7 is then introduced through the opening in the top of the valve casing against the valve 31 with the lever 8 in raised position; the abutment collar 3% is placed against the lower end otfthe spring; the fork 5 is brought under said collar. and. the presser foot 18 against the edge thereof; the lever 8 is then swung downward causing the frame 1 to move upward and the fork 5 to compress the spring until the lower end of the spring, the collar 84C and the fork 5 rest above the top of the coin plunger loser ing, 37 the lower part of the frame is then pressed inwardly against the tension of the curvature of the iowe end of the sprin heie the collar 34+. registers with farther npwerd and the for-h 5 l nshes tin collar on the valve stem and compresses the hole valve stem in which osition the device end the coilsi and spring ere. locked. by the lever and link, their connecting point Ill. to the left oi the plunger axis; the

gin then driven through the hole in the valve s the colleen under pressure of the spring,

end or the valve stem; the lever 8 k down to itsiowerrnost PGSIEIQHL during which movement the frame moves g 33 until the collar is sleeve the pin tem and the lever B raised to let down upon the pin. The valve is then properiy mounted and the device is removed.

Having" thus described my invention,-

ivhet l new end desire to secure by frame, s spring en gaging pert on said frame,

2, beer on said frame, a plunger reciprocetiv counted in ssid bearing in el1ne-' inent w staid engaging pert; aiever pivoteiy mounted on said theirs: and e A golunger,

said lever nod s YE comprising e on seidfrelne, 4 me e plunger reeiprd ment w. n otsil conne plunger and said leven. the ccnnetmig point of said lever and link being adopted to such. position when the plunger moved toward. said engaging part hv said lever and link, as to lock said in said position. Y It-h A. spring compressor comprising a, frame, a syring engaging pert on said. frame, it on said frame, at plunges reciprocstively mono ed, in said hearing in slinemeet with said pert e lever pivotsliy mounted on said frame at one side of the axis scid plunger, and a link connecting said plunger and said lever, the connecting point of said lever and said link being such as to swing to the side of the pivot of said lever when the plunger is moved to ward. said engeging part by said lever, whereby the plunger is locked in such peed tion. i I A spring compressor comprising a frame, spring engaging fork on said tee MAB

n'esser foot adjustably mounted on said rame' adjacent said fork and means for reciprocating said plunger. v

6. A spring compressor comprising a frame, a, spring-engaging part on said frame, a plunger reciprocatively mounted on said frame in alinement with said engaging part, a lever pivotally mounted on said frame, a link pivoted at one end to said lever, said plunger being provided with a plurality of holes and a pin adapted to be I inserted in any of said holes and to' connect lever, said plunger being provided with a plurality of holes, said bearing being prothe lower end of said link to said plunger.

7. 'A spring compressor comprising a frame, a spring engaging A part on said frame, a bearing on said frame, a plunger bearmg 1n reciprocatively mounted in said alinement with said engaging part, a lever pivotally mounted on said frame, a link pivotally connected at its upper end to said vided with a longitudinal slot with which said holes in the-plunger are ada ted to register, and a through said slot into any ofasaid holes in the plunger and to connect t' e'lower end of said link with said plunger 8. A spring compressor comprising a U shaped frame, an engaging part on one arm mounted on the and at its other end to pin'adapted to be lnsertedr of said frame, a bearing on the ,other arm I of said frame, a plunger reciprocatively mounted in said bearingin alinement with said engaging part, and means for recipro diatemember 0 said U-shaped'frame, and

a link connected at one end to said plunger said lever, the connecting point of saidlink and lever being adapted to cross the axis-of said plunger when the plunger is forced down by said lever and link and to rest at the side of the plungeraxis opposite the side at which the shaped frame, an engaging part. onI.-one arm lever pivot is located, whereby the plunger is locked in its lower position. I a

In testimony whereof, I have hereunto set my hand at San Franclsco,

20th day of November 1916.

In presence of- JOHN'R. OBER, P. S. PIDWELL.

California, this HARRY I. MAGKEEVER,

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