US78725A - Luther h - Google Patents

Description

@atten gratie iatrirt @Hina Letters Patent No. 78,725, dated Jima 9, '1868.

IMPROVEMENT IN SEINGLE-lltiAUlElIllES.-

I iiieidgehnh vatterrit fr iu fipa titta's atentairh making parini tigt same.

T0 ALL WHOM IT MAY CONCERTS:

Bc it known that I, LUTHER H.DODGE, .offOshkosln in the county of Winnebago, and State of Wisconsin, have invented-new and useful Improvements in Shingle-Machines; and I do hereby declare'that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make anduse the same, reference being had to the'accompanying drawings, forming part of thisvspecication.

Figure 1 is a sectional view of that part of a shingle-machine having my improvement-s. Thesection" is takenthrough the lineg/ y, fig. 2. i

Figure 2 is a cross-section of the same through the line a: ce, g. 1.

Similar lettersof vreference indicate corresponding parts.

This Ainvention refers to shingle-machines, aud is more particularly designed as an improvement upon that known as the Valentine shingle-lmachine, though it may be applicable to other machines' hav-ing asuilciently similar operation of the carriage. f In Valentines machine, the tables are operated to -feed the bolt to the saw by means of right-angular arms, placed transversely through horizontal shafts at each end vof the framing. As the armsrevolve in opposite directions, the tables arebrou'ght together above the san', working against the foro e of'a bent spring between the tables. As soon as the arms clearthe edges of the sliding tables, the latter .are thrown back to their original position vby thel bent spring. By this constructionthe lumber is fed tothe' saw more rapidly during the rst'half of a out', when the saw has the highest velocity, and slower during the latter half of the cut, in rder to keep the saw constuntlyat a uniform velocity. l

It consists'nl actuating the carriage holding the 'shingle-block back from the saw by the positive movement of a revolving arm, thus dispensing with the spring now used for that purpose, and obviatingthe'disadvantages attending the use of such springs.4

In the machine alluded to as being improved by my invention, the carriage is returned from the saw by the action of a spring, the use of which has the following objections:

First. The retrograde movement of the carriage isl often irregular. i Second. The carriage is frequently sent back againstthe cross-bar or hurter with too forcible an impact, which jars and deteriorates the machine, often causing the samjeto get out of repair.

Third. On other occasions, when the lubricating-oil on the guides becomes gumme`d, the return of the carA ringe is too slovhwhich causes it to meet the feed arm at the wrongftime'. Y

' Fourth.` A large percentage of vshingles is spoilcd'by the concussion of the carriage, when actuated by a lspring as above'istated, for such concussion dislocates theshingle-block from its propery position, and one shingle is cut before the block settles back to its correct position. 1

Fifth. The spring, also, is frequently broken, thus occasioning expense and loss of time in replacing iti By my improvements the above-cited objections are obviated, and the machine is made to run uniformly,

and with less consumption of lubricating-material'. It is also more easily attend-ed.

The improvements will, by reference to the drawings, be seen to consist of the arm a, and its gearing rand other parts, all of which will hereinafter be more fully set forth.

A is thegeneral frame of a shingle-machine, Vone'end only being showluas the saw Works in the middle of the frame-end, the carriage and its' feeding-mechanism being, in practice, duplicated at the other e'nd.

, A is the horizontal saw, revolving upon the vertical shaft A.

-B is the carriage, which slides in guides to and fro before thc sary, in theusualmanner.

On the shaft P, which bears the usualfc edarms'h, I place' ayloose sleeve, m, having keyed or otherwise aixed thereto thearm g, which bears a slotted-arm extension, a, adjustable, as shown., by set-screws u. Thisv extension terminates-in a stud or wiper, a', similar to `those shown ate, on'the arms b.

The bevel-uheel M is keyed on the shaft Pfas shown, and. engages with'the similar w shaft R. A vberelfvvheel, Q, keyed on the same vshaft R, engages a bevelnvheel, L, keyed on the sleevem, or cut thereon, as may be. v v

'lhe shafts l? and R have" bearings,- as' shown, the extensions A 'furnhing one. bearing .for the shaft R heel N, keyed onthe The gearing, M, Q, N, and L, is so proportioned', asi-ltoproduce double the motion of the arm a tothat of -b.

From the carriage B there projects aniarm, D, the outer endof which terminates in plates d d, as shown, and Within which che stud e enters when feeding the block u'pto the saw.

The return of the carriage and block was -heretofore -produeed by nspring, as above stated,fbutby my improvements the arm a, and its stud a" ere employed, which, vasthe sleeve mlrev'olv'es, produces th'e return. of the 'carriage-block' by the employing of the said stud a upon ai`shoulder-plate, E, affixed by bolts and nuts z' to the arm D, and on `the side opposite' to the plates dtd, as shown. The red outlines .shown at D B ,exhibit the -carriange inthe uct of being brought beck arm d, the latter heing'shox'vn in red outlines also.

Thus the arriage bearing thel shingle-block is returned -from-the-:znv with a regular and4 Il oeitiveV motion,

thhbcbnduces to the perfect and economical working of the machine, ashas 'been thoroughly established by the daily-employment of a full-sized machine in practieal use. A

My improvements are of small eomparutve cst,a}nd` cnn .be readily'atta'ehed tothe'machines new in use without altering lthe generalform of thefsaine.'4 l i I claim as new, `anddesire to ,secure byLetters Patent- -The combination-,ofthe 'shaft P,`,eleevlo m, bevel-xiheel'sM N L, the arms a armD, and plate E of the carriage, substantially as described, for the purpsegspeoied. I l 4 v v LUTHER H. DODGE.'

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