US1827052A - Log barker - Google Patents

Description

Oct. 13, 1931.

C. B. THORNE LOG BARKER Filed June 27, 1930 2 Sheets-Sheet 1 FIG. 2.

C. B. THORNE Oct. 13, 1931.

LOG BARKER 2 Sheets-Sheet 2 Filed June 27, 1930 i tions; to

by'min-imizing: the load, that is to say, where 7 considerable lifting force is 'requiredtby roll-,c

Patented Oct. 13, 1931 i j CARI Boson 'rnoimnior amu e oNrARIqcANAna-f f LOG imaxnn fApplicatlonfi ile d June ,27, L930, Serial No.'4=64,240. v

Theinvention relates to a log barker, as described in the present specification and illustrated in the accompanying drawings that form part of the same. i

The invention consists essentially in recip rocating the disturbing members under the pile of logs in order to'keep theselogs continuously tumbling and rolling in their passage to the discharge, as pointe'dout'in the 1-1 claims for novelty following a description of an acceptable form ofthe invention." The-"objects of the invention are to strip the bark from the'logs gathered together'in considerable piles and at the same time maintain'the onward movement by facilitating the depletion of the pile at the delivery end, after the logs have had full opportunity to rub sufficiently to be relieved of the bark; to economize in'so far astime and labor are concerne;

' 2 nd complete the stripping of great 'quant1- ties of logs in one treatment or a succession of similar treatments and tliUSfi-VOld' much extrahandling often required through the return of the logs for further stripping operaconserve the power. at great plants ing the logs and effecting the rolling by a contributory rolling motionadanted to. turn the Wings in a natural movement,andr at the same time facilitatetheir discharge and generally to relieve thecon-gestion in'logpilesandprovide an efficient and simple means ofdisturbance:

. In the drawings' Figure lis a. plan view of the pocket showing the l supporting and disturbingmembers. 1 c v 1 GFigure 2'is an elevational view of theioperating. mechanism as illustrated in Figure and showing the-pocket section. 5 7

FigureB is a perspective detail of the reciprocating carriage and disturbing, members. r

Figure 4 'is an elevational detail of the ,jicarriage without'the'front cross beams. 1

Figure .5 is a cross sectional view on the line 5-5 in Figure-'1. s 1

Like numerals of reference indicatecor- 51:5 respending parts" in the various figures;

said ends comparatively loose,

.25 and 26 joined d 28.

shaft 23' and the lower bearing beams carry 2 containing logs in carry the chains so Referring to the drawings, the numeral 15, indicates a pocket having at one'end the inclined feed platform 16 down which the logs are rolled into the pocket and at the other end the dischargerun'way :17,which extends '36 from the end wall l8 inclined. towards said runway. 1:1 a

' The chains 19 extend-from end to end of the pocket at the bottom-and are fixedly secured at theends 20 and 21 and hang between this slackness being taken-up by the disturbing members, indicated-by the sprocketwheel's 22. i

The sprocket wheels 22 are fixedly mounted 0n theqshaftw23 and this shaft is journalled dfi in the carriageQ-i at the upper end'thereof.

The, carriage is formed of the end frames by the cross 'b eams' 27 "and The upper bearing beams :29 carry-the the shaft 31, while the legs, 32 have the axle bearings "33'for the, axles of the carriage wheels 34-which roll on-the tracks 35 and 36.

.- The gears 37 coact on the one hand vwith thesprockets 22 and on the other hand with the racks 38, these racks being rigidly secured tothe ties 39, which also supportthe tracks or rails 35 and 36,1butare within the trackwaythat is to say; between the rails.

Two of thesprockets 22 are"intermediate 1 of the outer sprockets'which coactwith the" racks therefore it is bymeans of these racks that the gears 37 are turned, which insures "the rotation of the shaft 23 and consequently of the sprockets-22; 935

j The chains 19 operate in the longitudinal openings 40 *formed by the spaced beams 4;1 which constitute thebottom of the pocket 1 betweenthe end .walls, and vit is between these beams in the openings iO that the sprockets 22' project upwardly into the pocket and. thateach chain: engages the logs and it is while the sprockets are running along and revolving in the openln-gs 4:0 s0 that'the rollingimotion is imparted to the logs, which are indicated by. the numeral 42. v Thecarriage 2a is drawn backwardly and forwardly, that is to say, it reciprocates and there are of. course several ways of recipro eating this carriage. Perhaps the simplest way to reciprocate this carriage is by means of cable with steam as the power, therefore the steam engine 43 is shown at one end and this steam engine 43 through its pitman 44 and crank 45 operates the shaft 46, carrying the flywheel 47.

The pulley 48 carries the belt 49 and this belt is trained over the nulley 50 mounted on the shaft 51. The snaft 51 carries the bevelled gear 52 which coacts with the bevelled gear 53 mounted on the driven shaft 54. The driven shaft 54 carries the spiral gear 55, which coacts with the shift gear 56. r

The spiral shift gear 56 is mounted on the hub 57 which constitutes the clutch members 58 and 59, this hub 57 forming a sliding sleeve on the drum shaft 60. 1 e

The drum shaft 60 carries the drums 61 and 62 and these drums have the coacting clutch members 63 and 64 which have clutch teeth operating in opposite directions respectively, corresponding to the teeth of the clutch members 58 and 59.

The cables 65 and 66 are wound on the drums 61 and 62 respectively and the cable 65 extends to and is secured to the eye-bolt 67 rigid with the carriage 24 in the center of the front beam thereof.

The cable 66 extends from thedrum 62 and is trained over the pulley 68 mounted in a suitable hearing at the upper end of the standard 69 beyond the pocket at the opposite end to the drums.

This cable 66 is brought around said pulley and secured to the eye-bolt 7 O rigid with the carriage 24 on the opposite side to the eyebolt 67, consequently when the spiral gear 55 moves the spiral gear 56 in the direction of the drum 61, the clutch member 58 engages the clutch member 63, and this drum 61 is then rotated and winds the cable up thereon, while the drum 62 is free to unwind.

In this way the carriage is pulled towards the drums, but when the engine is reversed, the spiral gear 56 will be moved in the other direction, that is to say, towards the drum 62 and the clutch members 59 and 64 will be in engagement, consequently the drum 61 will be free of the drum 62 in operation.

This will pull on the cable 66 and draw the carriage 24 in the opposite direction, that is to say, on the return passage and these movements will be maintained constantly with the result that the sprockets are rolling along in the openings 40 and carrying said slack chains into the pockets, which has the effect of tumbling the logs in a rolling motion, somewhat similar to what may be called the natural rolling motion of their own, which has the effect of stripping the logs of their bark.

In order to keep this motion up automatically, it is desirable to install the trip rod 71 slidably mounted in the brackets 72 and havgitudinal ing the arms 7 3 and 74 engaged by the trip arm 75, rigid with the carriage 24.

The rod gear extends through to the reverse lever 7 6, by means of which the direction of rotation of the engine shaft is reversed.

In the operation, the logs are rolled along the feed platform into the pocket and this pocket fills up, and contains a great pile of logs constantly moving into the pocket and constantly moving out of it, as of course the idea. of the invention is to handle great quantities.

The reciprocating movement of the carriage 24 accounts for the constant travel of the logs and the stripping thereof while they are in the pocket. The speed of the carriage movement and the extent of the log rolling motions are regulated according to the circumstances of use and the constructional de tails are arranged accordingly.

The carriage is pulled along from one end to the other and back again and the chains engaging on the sprockets roll these logs against one another and tumble them, so that Coo the rubbing takes off the bark and at the same time keeps them in motion through to the delivery end and constantly rolling down the runway.

The feed is of course continuous and there fore the logs have no opportunity at the feed end to back up against the oncoming logs, while the runway at the discharge end is free and naturally the logs find their way along the line of least resistance and the final '100 result is the clean log barked in a way that will not chip it thereby eliminating the loss due to the chipping of logs in rougher machines.

What I claim is z- 1. In a log barker, a log pocket having feed and discharge ends and a bottom having lonopenings therein, slack chains secured at each end and extending along said openings and a carriage having drivensprocket members engaging said chains and lifting the logs in said pocket and reciprocating beneath said pocket.

2. In a log barker, a pocket having longitudinal openings in the bottom thereof and. rigidly secured slack chains extending along in said openings, a carriage reoiprooatively arranged beneath said pocket having suitable shaft bearings therein, a sprocket shaft and sprocket members mounted thereon and supported in said carriage, said sprocket members engaging and lifting said chains in their passage along said openings into'said pockets, a gear shaft, gears coacting with said sprockets mounted thereon and supported in said carriage, stationary racks extending along and suitably secured and coacting with said gears and means for reciprocating said carriage under said pocket. I

3. In a log barker, a log pocket having and a discharge runway and intermediately openings, slack chains rigidly secured at each end and extending along said openings, sprockets engaging and through said openings, a reciprocating carriage having a shaft journalled therein and carrying said sprockets, gears coacting with said sprockets and racks coacting with said gears, rails forming a trackway for said carriage, drums and cables connected with said carriage and forming the means of reciprocating the same beneath said pocket, motive power operatively connected with said drums and means operated by said carriage for reversing the direction of movement thereof at the end of its travel.

Signed at Montreal, Canada, of June, 1930. i

i CARL BUSCH THORNE.

this 6 day lifting said chains

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