US651828A

US651828A - Mechanical movement.

Info

Publication number: US651828A
Application number: US73589699A
Authority: US
Inventors: Alexander W Copland
Original assignee: Individual
Current assignee: Individual
Priority date: 1899-11-06
Filing date: 1899-11-06
Publication date: 1900-06-19
Anticipated expiration: 1917-06-19

Description

No. 65|,828. Patented lune I9, |900.

A. W. CDPLAND.

MECHANICAL MOVEMEVNT.

(Application led Nov. 6, 1899.)

(No Model.)

wSvaaAttorney NTTED STATES PATENT OEEIGE.

ALEXANDER XV. COPLAD, OF BOSTON, MASSACHUSETTS.

MECHANICALMOVMENT.

SPECIFICATION forming part of Letters Patent No. 651,828, dated .Tune 19, 1900.

Application filed November 6, 1899. 4Serial No. 735,896. (No model.)

To all whom iz'; may concern.-

Be it known that I, ALEXANDER W. Cor LAND, a citizen of the United States, residing at Boston, Suffolk county, Massachusetts, (post-office address 252 Massachusetts avenue,) have invented certain new and useful Improvements in Mechanical Movements, of which the following is a specification.

This invention pertains toimprovements in mechanical movements having a variety of capacities, but intendedv principally for the conversion of continuous rotary motion into intermittent reciprocating motion at varying speed. An exemplifyin g utilization of the movement may be found in connection with cake and confection machines in which it is desirable to operate reciprocating valve-rods, plungers, or other parts at stated times and at varying speeds, the motion being derived from a continuously-rotating shaft.

My invention will be readily understood from the following description, taken in connection with the accompanying drawings, in Which- Figure 1 is a front elevation of a device embodying my invention; Fig. 2, a plan thereof, parts appearing in horizontal sect-ion in the plane of line a of Fig. 1; Fig. 3, a diametrical section of the compound cam and its' clamp in the plane of line d of Fig. l; Fig. 4,

Aa horizontal section of the main cam-arm in` the plane of line bof Fig. 1, and Fig. 5 a horizontal section of the main cam-arm and supplementary cam-arm in the plane of line c of Fig. 1.

In the drawings, 1 indicates a fixed frame part; 2, a cam-shaft journaled therein and designed to have continuous rotary motion; 3, a peripheral cam secured to the cam-shaft, the peripheral contour of the cam being d etermined by the nature of the motion to be produced, as hereinafter more f ullyexplained 4, a second peripheral cam also secured to the cam-shaft alongside cam 3, the two cams forming together a compound cam and being preferably formed in one piece, as seen in Fig. 3, and adjustably secured to the cam-shaft, as will be explained; 5, a collar fast on the camshaft 2 and disposed within a counterbore in the compound cam, the it of the compound cam upon the shaft and collar being such that the cam may turn upon the cam-shaft; 6, a

`clamp-collar loose upon the cam-shaft to the .between clam p-collar and the front wall of the compound cam, thus clamping the cam rigidly to the cam-shaft in adjusted angular relationship; 8, a kpivot with its axis paral# lel to that of the cam-shaft; 9, a cam-arm swinging on the pivot 8; 10, a roller carried by cam-arm 9 and engaging the periphery of cam 3; l1, an upward extension of cam-arm `9, horizontally slotted for the reception of a sliding block; 12, a block adapted to slide .in the slot of extension 11; 13, an adjustinga screw in extension 11 at oneend of the slot therein and adapted to limit or entirely re strict the sliding motion of block 12 in'its slot; 14, a pivot`carried by sliding block 12; 15, a pivot-shaft with its axis parallel to that of cam-shaft 2; 16, an arm mounted on pivot-shaft 15 and having a curved slot;

17, a toothed segment secured to the rear face of slotted arm 16, to one side of the slot therein; 1S, a sleeve passing through the slot in arm 16 and having at its rear end a an'ge engaging against the rear face of the arm, the forward end of this sleeve projecting some distance forward of arm 16; 19, a pointer se-` cured to the flange of .sleeve 18 and projecting outwardly and forwardly to the front face of the arm to serve in indexing the position lof the sleeve lengthwise iu the slot; 20, a

sleeve loose on the forward portion of sleeve 18, its rear end impinging against the front face of arm 16; 21, a nut screwed upon the front end of sleevelS and adapted to force Y sleeve 20 against arm 16, and thereby clamp sleeve 18 to the arm; 22, a spindle axially journaled in sleeve 18; 23, a pinion fast' on the rear end of spindle 22 and gearing with toothed segment 17; 24, a handle on the for ward end of spindle 22 to serve in turning the spindle and pinion; 25, a link pivoted at one end to pivot 14 of sliding block 12 and at the other end pivoted on sleeve 20; 26, an

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arm ,projecting from the hub of slotted arm 16; 27, a rod pivoted to the extremity of arm 16, this rod being the exemplifying element to which reciprocating motion is to be imparted; `23, a so'nd cam-arm pivoted on. the hub of cam-arm 9 and projecting substantially at right angles from cam-arm 9; 29, a

roller mounted in the extremity of cam-arm 28 and engaging the periphery of cam 4; 30, a spur projecting upwardly from cam-arm 28; and 31 a set-'screw engagingthrough a lug upon the rear face of cam-arm 9, its point impinging againstspur .A

The rotation ofthe compound cam will obviously impart positive oscillating motion to the cam-arms 9v and 28 and to extension 11 of cam-armi). Assuming set-screw 13tobe adjusted to entirely restrict the sliding motion* of block 12, then itis obvious that the full motion ofextension 11 will be imparted toA arni 16 and corresponding reciprocating niotion'be imparted` to rod 27:

l By loosening nut 21 and turning handle 24; the pivot at theright-hand endoflink 25 may be adj usted to various radial ldistances from the centerzof shaftll, thus permitting of an adjustment of the degree of` stroke of rod 27 relative to the. degree of motion produced by the cams,y

This adjusttnentfalso varies thejdegree of44 oscillation of arm 16, and the adjustment may be availedV of, rif desired, int-determining the` degree of rotatory `motion impartedY to pivotshaft 15 incase that shaft is utilized for purposes other thantha't of ra mere pivot for arm 16. If'se-t-screw 13 be so adjusted as to permit Vmore or, less sliding motion of block 12 inthe slot -ot extension 11,then-tl1e motion transmitted to arm 16 will be a corresponding degree lessfthan the motion of extension 11 and intervals of rest will occur at'the end Aof each swing of arm 1G, and consequently at each endof each strokeof rod 2 7. `By

loosening bolts 7 the compound cam may be turned upon cam-shaft 2 and then reclamped, thus providing for the adjustment ot the time ofmotion of the parts actuated bythe cams .p1-relative to the time ot' motion of any other device which may happen to derive its motion from cam-shaft'2. v

Such contour is to be given to cam 3 aswill impart the desired outward motion to camarm 9. The contour of this cam 3 mayl be produced in any manner desired and modiiied as desired. After the contour of cam 3" `is .satisfactory then the contour of came 1 n'ust be made reciprocal to it-that is to say, for 7every position of roller 10 asproduced *Y bythe rotation of cam 3 roller 29 must find a bearing-point` `upon 'cam 4, lwhose contour must be Vfor-med accordingly. Set-screw 31 serves asa means for adjusting roller 29rel` ative to rollerlO so as to yavoid lost motion. The contourof cam3 having been produced satisfactorily,the giving of cam 4 a reciprocal contour involves an exceedingly-simple process. The compound cam, the contour of cam 3 being finished and the contour of cain 4 beingunfinished, is mounted for rotationand equipped with the cam-arms and roller 10,

the latter engaging theI periphery of cam 3.

Amilling-cutter is put in the place ofrollerk 29. yRotary cutting motion being given to the milling-cutter and rotary feeding motion being given tothe compound cam, the periphery of cam v4 becomes milled in reciprocal correspondence with that of cani 3.

j I claim asmyinvention-l j 1. In a mechanical movement, the combination, substantially as set forth, of a rotary cam-shaft, a'cam. thereon, .a pivot with its axis parallel with the cam-shaft,l a cam-arm mounted on said pivot and engaging said cam and provided Witha slot, a block adapted to slide in-said slot as the camarm rocks, aV pivot carried by said block, anda link connected with'said pivot. n

2. kIn a mechanical movement, the combination, substantially as set forth, of a rotary `cam-shaft, a cam thereon',` a pivot with its axis parallel-with theV cam-shaft, a cam-arm mounted` onf said pivot and engaging-said Vcam and provided with a slot, a block adapted to slide in said slot asthe calm-arm rocks, a pivotcarried by said block, a link connected withsaid pivot, and a set-screw in said cam-arm at one end of the slot therein adapted toyadjustably limit thesliding motion `of the blockin the slot.y Y l d 3. In a lmechanical movement; the combination, substantially as set forth,` of a rotary cam-shaft, afcam thereon, a pivot with its axis rparallel with the cam-shaft, a cani-arm-y mounted ou said lpivot and engaging saidcam a second pivot with its axis, parallel with the cam-shaft, an arm mounted onsaid second pivot and provided with a 'curved Islot, a

ptoothed segment secured to said slotted arm,

a' hollow pivot engaging saidcurved slot, a clamp-nut upon said hollow pivot for clamping said pivot 'in selected position inrsaid` 1 slotted arm, a spindle journaled in said hol- *low pivot, a pinion mountedon-s'aid spindle andl engaging said toothed segment, means lfor turning said spindle, anda link connecting saidihollow pivot andsaid cam-arm.

4. In a mechanical movement, the combination, substantially as set forth, of a rotary cam-shaft, a compound peripheral cam, as

described, secured thereon, a'pivot'with its axis parallel with the cam-shaft, a pair of united cam-arms mounted on said pivot and engaging said cams respectively and having a slot, a .block fitted for sliding motion in said slot as the cam-arm rocks, a pivot carried by said block, a screw in said cam-arm at one end of said slot for limiting the sliding inotion of the block in the slot, a second pivot with its axis parallel with the cam-shaft, an arm mounted on said second pivot and having a curved slot, a pivot adjustable in said curved slot, and a link connecting. said lastmentioned pivot and the pivot carried by the sliding block.

' vALEXANDER W. ooPLAND.

VWitnesses:

Ronm.` W. HUNTER, H. SToRER BARRY.

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