US373293A - Stroke-jointer - Google Patents

Description

(No Model.) 3 Sheets-Sheety 1. E. JENNBRv/G. EISERER. STROKE JOINTER.

No. 37 .293 Patented Nov. 15, 1887.

3 Sheets-Sheet 2.

(No Model.)

E. JENNER 8v CT. EISERER.

STROKE JOINTBR.

N Pinna Hummm-4pm. wmingnn. n c,

(Normaal.) 1 l ashe'ets-s-heet 3. E. JENNER & G. EISERER.

STROKE JOINTER. l

No'. 373,293. Patented Nov. 15, 188,7.

fw f I if -Ja N. PETERS. Pnuwulhogmpner. Wamingnx. D4 C.

` A' UNITED STATES .PATENT OFFICE.

ERNSTJENNER AND GEORG EisEER, OF OHIOAGO, ILLINOIS.

STROKE-'JolNl-Ea.

SPECIFICATION forming part of Letters Patent No. 373,293, dated November 15, 1887.

application filed May a1, 1887. sel-m1 No. 239,804. (Nomodel.)

To all whom z5 may concern.-

Beit known that. we,`.E1 2NsT. JENNR and GEORG` EIsERERjsubjecrs of the Emperor of Germany, residing at Chicagmin the countyy ofl Cook andv State of Illinois, have inventedj certain vnew 'and useful Improvementsr in` Stroke-Jointers, of which the following is aj specification, reference being had therein to the accompanying drawings;

This invention relates to machines for planingr the edges of planksgor strips to be per-j fectly straight and smooth for. forming close! Machines for that, Vpurpose have heretofore generally -consisted of joints when put together.

a frame guiding the reciprocating.planer-head and provided with an adjustable support for holding the plank or strip to b e planed, and of a shaft journaled in standard-bearings secured'upon the floor some distance away from the machine, and having mounted loose and tight pulleys for driving by a belt and a balance-wheel, with a. cranklpin connected with the planer-head by a pitman for reciprocatingl such planer-head. This arrangement for thus transmitting a reciprocating movement has many disadvantages-it takes up much floor room in the shop, the strain ,and momentum of reciprocation being sustained by the floor cause the entire building tol shake, and the long pitman thus projecting endangers t-he workmen.

vide a machine that is compact and complete within asingle frame inwhich the distance ofre-i ciprocation of theplaner-head can be instantly adj usted, and wherein .the momentum ofreciprocation is counteracted; and with these Objects vin view our invention consists of the novel devices and combinations of devices hereinafter described and specifically. claimed.

In the accompanying drawings, Figures 1 and 2 represent side elevations ofthe machine,

showing the planer-head on its two opposite 1egs,1, andhavinga dovetailed groove, 2,

vserted the planer- knives 8 and 4, one above vand the other below a dividing-strip, 5.

Upon the front edge and against the`front face of frameA is secured the board-supporting frame C by a thumb screw, 6, passed ,through a slot, 7, in the .pendent iiange 8, and

adj nstably holding it byaset-screw, 1l, passed f planednin its upper surface for. guiding the planer-head B, that in its vertical face `has in through such slot and tapped into a prot'uber-` ance, l2, of frame C, that enters the slot in bracket 10, for guiding the same. The lower end of the vertical leg of each-T shaped bracket 1() has a lug, 13, tapped by a screw, 14:, andthese screws 14 are pivotedin eye-lugs 15 of frame C, and have collars 16 and sprocket-wheels 17, that hold the screws vertically, and one of these screwshas formedto its Vlower end a crank, 18. VAu endless chain, 19,

stretched oversprocket-wheels 17, will cause both screws 14. to move simultaneously, and as turned by crank 18 in one direction or ani 1 other to raise or lower the brackets 10. Now, it is the object of our invention to pro` Upon the rear ends of T-shaped brackets 10 is secured byV hinges the rear edge of table D,` the front edge of which is supported on the Apoints of set-screws 20, tapped through the forward ends of brackets 10, for adjusting table D to a horizontal or angular position.

The upper planer-knife, 3, is to be adjusted for cutting a heavy chip, wherefore the board to be planed on its edge is supported on the shelf of standard 9 and on strip 5, after which the smooth cut is made by the lower planerknife, 4, wherefore the board is placed upon the table D, butting against standard 9;

So 'far described 1 thedevices, excepting slot 7 Of frame c, and thumbscrew 6, for adj ustably securing frame C, are old, and we do not` claim the same, and now we will proceed with describing our improvements in devices for reciprocating the planer-head.

In a bracket-bearing, 21, secured against ICC screw, 26, the crank-pin 27.

one of the legs l, and a standard-bearing, 22, secured upon the iloor is journaled the driving-shaft E, having loose and tight pulleys 23 and 24 for driving by a belt, and having mounted upon its end a disk, 25, radially slotted for adjustably securing by a thumbrIhis crank-pill 27,by a pitman, 2S, is connected with a crankpin, 29, that is rigid with a wheel, F, having two grooves in ils periphery for the ends of a rope, 30, passed around the same from opposite directions about one-half its periphery, and is secured thereon. This rope 30 is wound over asmaller pulley, G, mounted upon a shaft, 31, upon which is also mounted a pulley, H, that is also provided with two grooves in its periphery.

rlhe shafts ot'whecls F and G H are pivoted between longitudinal bars secured against legs 1.

Grooved guide-1mlleys I I' are pivotcd with their journals in boxes 32,horizontally guided in brackets 33, secured against the opposite ends of frame A and provided with screws 34, for adjusting these boxes 32. To a couplinglink, 35, secured to the pendant 36, that is bolted to be rigid with planerhead B, are secured the ends of two ropes, 37 and 3S. The rope 37, being passed over pulley I, is then passed with its opposite end over about onehalf of the circumference of pulley H, and is secured thereto, while the rope 3S is passed over pulley I', and then over pulley H in the direction opposite to rope 37, and is secured thereon, both ropes 37 and 3S being stretched taut by moving pulleys I and I by means of screw 34. rlhe rotating movement of the main shaft E will tlansmit an oscillating movement to wheel F, which angle of oscillation may be increased or decreased by shifting thc crank-pin 27 away from or toward the shaft E. This oscillation of wheel F being transmitted to wheels G and H by rope 30 in an increased proportion, the ropes 37 and 3S again will transmit it to the planer-head to be reciproeated thereby, and for the purpose of breaking the momentum of reeiprocation to a certain extent the link 35 may be connected to the pendant 36, with interposed rubber blocks, that will make the pull elastic in either direction.

A further device applied to prevent shaking of the machine from the momentum of reciproeation consists in providing the disk 25 with cam projections 39, which,just at the point where the crank-pin passes the point reversing the motion, come in contact with a small roller, 40, of a lever, 41, pivoted at about its center in a bracket, 42, that is rigid with the frame, while its upper end connects with a rod, 43, that is passed through a rubber spring, 44, at the opposite end of frame A,

and is adjustably contracted against such spring by a nut, 45. The roller 40 will thus act as a brake forpreventing a backlash of the parts at the end of cach stroke of planerhead B.

It will he noticed that a machine thus constructed is complete within a compact framework, so as to occupy but little space, and is arranged to be easily adjusted for different lengths of boards or strips to be planed for jointing, and the operating parts are so constructed that they cannot readily get out of order. v

Vhat we claim isl. The combination, with-the planerhead and frame in which it is guided, of pulleys pivoted to the opposite ends of the frame, a pulley located below said frame, suitable mechanism for oscillating such lower pulley, and ropes secured to the planer-head, passed over the pulleys on thc ends of the fraineand wound in opposite directions upon the lower pulley and secured thereto, substantially as set forth.

2. The combination, with frame A and planer-head B, having pendant 36, of pulleys I I at opposite ends of the frame, pulley H beneath the frame, pulley G, secured on shalt with pulley H, pulley F, located on separate shaft, main shaft E, having crank-disk 25 and pitman 2S, ropes 37 and 33, connecting pendant 36 with pulley H in opposite directions, passing over the pulleys I l', and the rope 30, connecting pulleys G and F, substantially as described.

3. The conibination, with frame A and planer-head B, having` pendant 36, of pulleys I l at opposite ends of frame A, pulleys H, G, and F below the frame, arranged as described, main shaft E, and disk 25, provided with radially-adjustable crank-pin 27, and pitman 28, ropes 37 and 3S, connecting pendant 36 with pulley H in opposite directions and passing over pulleys I I, and rope 30, connecting pulleys G and F.

4. The combination, with the reciprocating planer-head B, and ropes, substantially as described, connected thereto, of the rotating shaft E, having the crank-disk 25, for operating the planer-head through the said connections, eam projection 39, provided upon the crank-disk, the lever 41, having roller 40, bearing on rim of disk 25, rod 43, connected to opposite end of lever 41, and spring 44, all substantially as and for the purpose set forth. In testimony whereof we affix our signatures in presence, of two witnesses.

ERNST JENNER. GEORG EISERER. Vitiiesses:

WILLIAM H. Lorz, Or'ro LUnKnR'r.

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