US1314728A

US1314728A - Mechanical movement

Info

Publication number: US1314728A
Authority: US
Publication date: 1919-09-02
Anticipated expiration: 1936-09-02

Description

G. 0. AMES.

MECHANICAL MOVEMENT.

APPLICATION men SEPT. 21, was.

1 ,3 1 4,728 Patented Sept. 2, 1919.

3 SHEETS-SHEET I- fi'law% A TTORIIEYS MECHANICAL MOVEMENT.

nrrucmon FILED SEPT. 21, 1918.

1,314,728; Patented Sept. 2, 1919.

3 SHEETS-SHEET 2.

WITNESSES W4 %wu "Llaw 94 4 TTORNEYS G. C. AME S.

MECHANICAL MOVEMENT.

APPLICATIONFILED'SEPT-2|. ma.

Patented Sept. 2, 1919.

3 SHEETS-SHIN 3 A UORNEYS which a shaft 3 GEORGE oonNrIE n AMES, or SAN rmmorsoo, camronnm.

MECHANICAL MOVEMENT.

S peciflcation of Letters Patent.

Patented Sept. .2, 1919.

Application filed September 21, 1918. Serial No. 255,094.

To all whom it may concern:

Be it known that I, GEORGE CORNFIELD AM s, a citizen of the UnitedStates, and a resident of San Francisco, in the county of San Francisco and State of California, have invented certain new and useful Improvements in Mechanical Movements, of which the following is a specification.

My invention is an improvement in mechanical movements, and has for its object to provide a movement of the character specified especially adapted for converting reciprocating movement into rotary movement.

In the drawings:

Figures 1, 2 and 3 are front views of the improved movement, showing the parts in different positions; i Fig. 4 is a section on the line 44: of Fig. 2;

Figs. 5, 6 and 7 are diagrammatic sectional views showing the various positions of the parts of the returning mechanism for the pistons;

Fig. 8 is a side view of a portion of the returning bar.

In the present embodiment of the 1nvention a suitable supporting frame 1 is provided, the said frame in the present 1n- -stance being substantially rectangular and having an intermediate cross bar 2 upon is journaled, the said shaft carrying a mutilated gear wheel '4. The shaft 3 is the element to be rotated, and the reciprocating elements are in the form of pistons (not shown) which are mounted to reciprocate in

cylinders

5 and 5 arranged at the top and bottom of the frame and at one end thereof'as shown. These

cylinders

5 and 5 each work steam in one direction, the cylinder 5 being supplied with live steam-at the end "remote from the frame 1 while the cylinder 5 is supplied with steam at the end adjacent to the frame.

The motive fluidis supplied to the cylinders by a supply pipe 6, which communieates with a pipe '7 extending between a pair of valve casings 8 and 8. Pipes 9 and 9* lead from the valve casings to the cylinders,

and the

valves

10 and 10 within I these casings are operated by levers "Hand 11. pivoted to the frame and connected at one 'end to the valves by links 12. The levers are provided at the ends remote from the valve? casings with rollers which are adaptp-edto be engaged Joy cam flanges or ribs 13 on the face of the mutilated gear wheel 4. There are three ofthese flanges or ribs so that each lever and each valve will be operated three times during each complete rotation of the gear wheel'to admit steam to the atljlacent cylinder. Each wheel 4 has threeseries 14 of gear teeth, all the series containing the same number of teeth and the spaces between the series are of the same length as the series, so that there are three mutilated sections of the wheel and three toothed sections, each having a length of sixty degrees. I

A rod 15 is connected with each piston and each rod 15 is connected at its outer 'end, that is, at the end remote from the piston, with a rack bar 16, each rack bar movlng in a guide 17 at the opposite end from the cylinder. Each rack bar carries a serles of fourteen teeth, and they are adapted to engage the teeth 14 of the wheel. It will be noticed that the motive fluid is admitted to the inner end of the cylinder 5 and to the outer end of the cylinder 5, so that the admission of motive fluid to the cylinder 5 will drive the piston to the right of Fig. 1, while the admission of motive fluid to the cylinder 5 will drive the piston to the left of Fig. 1, that is, each rack bar is fluid operated in one direction and is moved in the other direction by the other rack bar, the connection being such that said first named rack bar is moved with twicethe speed of the last named or actuatingrack bar. A lever 18 is pivoted at each side of the frame 1, that is, at the top and bottom of the said frame, each lever having a longitudinally extending slot 19 at one end which engages a pin 20 on the frame. At the opposite end each lever is pivoted to the adjacent rack bar, as indicated at 21. Thus the lever at the leftof Fig. 1 is pivoted to the rack bar at the 'bottomof the figure and has a lost motion connection with the frame 1 at the top of the'figure. Each rack bar 16 carries a rigid arm 22, each of the said arms extending inwardly at approximately a right angle to the length of the bar, and

each arm carries at its inner end 'a roller 23.

Each lever 18 is provided intermediate its ends with an offset portion 24 as shown more A coil spring 'vided, one opening 26 being between the small end of the cam and the shoulder formed at the junctionof the offset port1on with the body of the lever, thevother being intermediate the ends of the These openings26 and 27 are ofya size to permit thepassage of the roller 23, and 'a guard or switch plate 28 is; pivotedto :the lnirh end of the incline, as indicated at 29, in a position such that it ;will normally cover the-opening 27 on the inclined face of the "V f 30 normally pulls the plate toward the inclined face ofthe'tcam and,

'referringto Figs. 5', 6 'and 7, it will be noticed thatthe said face is rabbeted to receive-the plate. A second coi1' spring31 is arranged beneath the plate, acting'normally to press. the: .plate outwardly into the "posi tion of Fig." 6, the springsi '3O and3'1being 7 arranged within recesses 'in the cam. 1" When the roller engages the inclined'face 0f the cam 'as showniin .Fig." 5 "it will ride' down the lined face; of the cam and over :the opening 27, because ofi-the interpositlon-of the s'witch origuard plate '28, and will'pass through the opening26,*as?shown inFig. 6. WV-hen, however,'the roller'23strikes the cam at' theopposite s ide from the inclined face, "it will pass throughithe opening 27,

swingingthe 'plate28 aW a'y fromthe said opening as shown in Fig. 7 Thesearms 22 are so arranged that that;'arm connected with the upper rack bar'willengage thele ver connected with 'the lower rack bar as the piston ;-in the: cylinder 5! moves outwardly under the influence "of the motive fluid, and: will swing the lever"18,imoving the rack bar 15 in 'connecti'on'with'o the cylind'er '5 outwardly, and attwice the speed of thepiston inthe cylinder 51 Thus each rack bar as itm'oves awayfrom the'cylinder'or toward'the cylinder under the influenceof-the motive fluid will move the other. rack bar in thesame direction but at twice the speed, i i

The operation is asfollowszReferring to Fig; 1, motive fluid is-just-being-admitted' to that endrof the cylinder5 remote from the wheel 4, and a rack bar 16 is-beginning to :move-toward the right ofFig. 1 under the influence ofthemotive-fluid; 11; carries the wheel 4 with it, because of the engagement of the teeth of 'the' rack bar with the adjacent series 140f teethion the wheel. At this tune the piston in'the cylinder 5 is at the end of its inward movement, and the teeth'of the rack bar 16*pertaining-"to said cylinder areout of engagement, with the adjacent series 14' of teeth. lAsfthe rack -bar 16moves,tothe right of'Fig.1', the arm 22 connected with the rack bar'will engage the lever 18" pivoted at the topiofj the frame 1, in the manner shown 'in" Fig."'5. The

r will ngage 'the'rguard :or' switch plate I 28, and will swing the lever, the lower end of thelever moving toward the right and carrying the'lower' rack bar toward the right. This movement will continue until the roller '23 has rolled the full length of the incline 25 and is ready to pass through the opening 26.

the parts being now indicated in Fig. 2. At the moment when the teeth 'of the upper rack bardisengage from the adjacent series of teeth on the wheel 4' the uppermost cam 13 will'pass out of engagement withfthe Now the lever 18at the 'left-offFig. --1 isreleased, the position of roller on the uppermost lever 11 and the lowermost cam 13: on the wheel will come into engagement with the roller on'thel e ver 11 atwthei bottom. Thus the valve in the casing8 will be closed and that in the casing 8" will be opened. Steam will now "flow into that end. of the cylinder 5 adj-a,-

cen't'to the wheel 4 and the piston in the said cylinder will be driven .tot'he left: At 1 I this moment the teeth of the rack bar ;16 I

will be in engagement with the lowerm'ost f;

series ofteeth on the wheelt, and the movement of rotation will be continued.- 'Atthe sam time the rack bar: ::at ther bo l Figs-"1, 2 and 3 will, through the arm22 connected therewith, return the rackbar *at :1

into rotary motion, comprising ,a' supporting,-

frame, a mutilated'gear wheel mounted on ioo the frame, said wheel having" three t'oothed V and three'plain portions atitsperiphery, racl; bar's atoppositesides of thewheel'for engaging the teeth "and having- "teeth: corresponding in number and-position-tothe teeth of the portions, a pair of'cylinders at one "end ofthe frame, a 'pistonin each cylinder connected to the adjacent rack bar for moving the same, means for admitting mo 'tive fluid to each cylinder and'to'the opposite ends of the cylinders to move the'pistons in opposite directions under-the influence'of the motlvefluld, means in connectionwith eachracl; bar for moving the other racki-bar with the said first named'rack bar when it is moved under the influence of the motive fluid at .twi'ce the ispeed'of the first" named rack 7 bar, said means comprising an'arm oneaeh rack bar, and a lever having a lost'mot on connection-with theframe adjacent to each rack bar, said levers being at opposite sides of the wheel, each armhavingapinfor err-- 1 5 having fmeans for engagingvthe pin'when gaging the adjacent lever, and. each lever the'arm' is moving in'one direction and for permitting the passageof the pin? when the arm is movingin the op-posite direction;

2. 'A' device for converting reciprocating into rotary motion, comp-rising a supporting frame, a mutilated gear wheel mounted on the frame, said wheel having three toothed and three plain portions at its periphery, rack bars at opposite sides of the wheel for engaging the teeth and having teeth corresponding in number and position to the teeth of the portions, a pair of cylinders at one end of the frame, a piston in each cylinder connected to the adjacent rack bar for moving the same, means for admitting motive fluid to each cylinder and to the opposite ends of the cylinders to move the pistons in opposite directions under the influence of the motive fluid, and means in connection with each rack bar for moving the other rack bar with the said first named rack bar when it is moved under the influence of the motive fluid at twice the speed of the first named rack bar.

3. A device for converting reciprocating into rotary motion, comprising a supporting 'frame, a wheel journaled on the frame, fluid controlled reciprocating rack bars arranged at opposite sides of the wheel, each rack bar being moved in one direction by the motive fluid and in the opposite direction to the other rack bar, the wheel having series of teeth for engagement by the teeth of the rack bars, means in connection with each rack bar for moving the other rack bar in the same direction and at a higher rate of speed when the said first named 'bar is moving under the influence of the motive fluid, and means controlled by the movement of the wheel for controlling the motive fluid fo the rack bars.

4: A device for converting reciprocating into rotary motion, comprising a wheel, rack bars at opposite sides of the wheel, fluid controlled means for moving each bar in one direction and in the opposite direction to the movement of the other bar, means controlled by the rotation of the wheel for controlling the movement of the bars, said wheel having series of teeth for engagement by the rack bars, and means in connection with each bar for engaging the other rack bar when said first named bar is moved under the influence of the motive fluid for moving said second named bar in the same direction as the first named bar and for releasing said second named bar when the first named bar is moved in the opposite direction, said connection moving the second named bar at twice the speed of movement of the first named bar.

5. A device for converting reciprocating into rotary motion, comprising a wheel, rack bars at opposite sides of the wheel, fluid controlled means for moving each bar in one direction and in the opposite direction to the movement of the other bar, means controlled by the rotation of the wheel for controlling the movement of the bars, said wheel having series of teeth for engagement by the rack bars, and means in connection with each rack bar for engaging the other rack bar when said first named bar is moved under the influence of the motive fluid for moving said second named bar in the same direction as the first named bar and for releasing said second named bar when the first named bar is moved in the opposite direction,

GEORGE CORNFIELD AMES.

Witnesses:

J. J. KERRIGAN, W. R. OAsTAGNn'rro.

CBpies of this patent maybe obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.