US1437846A - Sawmill carriage - Google Patents

Description

INVENTOR Patented Dec. 5, 1922.

2 SHEETS SHEET I.

ATTORNEY -H. C. HILKE.

SAWMILL CARRIAGE.

. APPLICATION FILED NOV. 22. 192ll,437,846.

Patented Dec. 5, 1922.

2 SHEETS-SHEET 2.

INVENT'OR: flew/y 6 52/41? ATTORNEY Patented Dec. 5, 1922.

newer-c. nrnnn, or sna'r'rnn, wrisnrne'ron.

SAWMILL CARRIAGE.

Application filedNcvember 22, 1921. Serial 1 lo. 516,92U.

This invention relates to power log shii't-i ing apparatus, and its object is the provision of simpleand efiicientdevices for use upon sawmill-carriages for controlling and Shiiting logs thereon.

The invention consists in the novel construction, adaptation and combination of parts hereinafter described and claimed.

In the accompanying drawings,- Figure 1 1s a plan view llustrating sawmill apparatus including a carriage with devices embodying my invention a plied thereto. Fig. 2 is a transverse sectional view taken substantially through 2-2 of Fig. 1. Fig. 3 is a side elevation to an enlarged scale of one of the power cylinders, with thevalve 'asing shown in longitudinal section.

In said drawings, the reference numeral 5 designates, generally, a sawmill carriage mounted on track rails, such as 6, and provided with transversely arranged head blocks 7 upon which are mounted knees 8. These knees are advanced or retracted in unison by means of screws 9 operatively connected to an operatingshaft 10 of suitable set works. At oneside of the carriage track is a saw indicated by 11 and located between a log deck 12, shown only in 2,

anda system of rollers 13 which are shown in Fig. 1. Located below the log deck 12 are transversely arranged skid bars lawhich are fulcrumed at their ends remote from the track to chairs 15g and are supported adjacent to their other endsby connecting rods 16 of power cylinders 17 whereby the last named ends of the barsmay be elevated through slots such as 12 provided in said log deck.

All of the devices above referred to are or may be similar to what are now employed in sawmill practice.

According to the present invention, I provide upon the carriage a plurality of transversely disposed power cylinders 18, two being shown, of the oscillating type having the trunnions, as 19, journaled in bearlngs 20 of frame bars 21 which are rigidly secured to thecarriage frame members 5 andb and constitute parts of the carriage.

Within the respective cylinders are pro vided pistons whose rods 22 are pivotally connected by pins 23 with the ends of arms 2-1 which are fulcrumed by pins 25 to the frame bars 21 in proximity with the inner side 5 of the carriage. i I

The arms 24 areiarranged so as to be swung through an arc of about 100, that is to say trom an approximately horizontal position to a short way beyond a vertical position, the extreme positions of an arm are respectively indicated dotted lines a' i and]; n 1g.

urthermore. the arms when in their retracted, or horizontal positions he entirely below the plane of the tops r headiblocks andin action protrude thereabove.

power ,medium. preierably compressed air, which is furnished to either ends selectively oi the cylinders '18 through the medium or pipe lines. 25 and 26 between the cylinder trunnions'19 and a valve casing 27 which is also connected by a pipe 28 with a source or reservoir of the powermedium.

Each of the cylinders 18 is provided interiorly withpassages as indicated by dotted lines 25 and 26 Fig. 3, affording communication from the respective pipes25 and 26 to the opposite ends, respectively, of both of said cylinders. The valve casing as illustrated-in 3 is provided with a bore 29 having at aboutits midlength an inlet open ing 28 from the supply pipe 28. I

At opposite sides of opening'28 the casing is provided with ports 25? and26 which communicate withthe pipes 25 and-'26.- Also provided in the casing are exhaust apertures 31 and 32 which are disposed between each nication between either of the ports andv the adjacent exhaust aperture while permitting the flow of the power medium from the supply opening 28? and the other of the ports. The valve is operatively connected as by a rod 35 with an arm 36 of a con- Said arms are actuated by any suitable .tion of a log as trolling post 37 which is rotatably moved as by means of a handle arm 38.

When it is desired to elevate or swing the arms 24% from positions as a Fig. 2 into the 5 position, the operator stationed on the sawmill-carriage 5 manipulates the post 37 to move the valve into the position in which it is represented in Fig. 3,

l/V'th the valve thus disposed, the power medium admitted to the back ends of the several cylinders project the piston-rods 22 outwardly to produce appropriate move-.-

ments to the respective arms, the power medium from the other ends of the cylinders exhausting throughpipe line 26, and port 26 and aperture 32 into external atmosphere.

To restore the arms 24 to their at positions, the operator regulates thevalve to reverse the travel of the power medium as above explained to and from the ends of the cylinders.

The above described log shifting apparatus is employed most advantageously when the arms 2% are in their Z) positions to serve as a buffer to cushion the impact of heavy logs when being thrust from the log deck onto the saw carriage to thereby relieve the latter, and more especially the knees 8 thereof, from jars or shocks. Another important function of the apparatus is the rolling of a log, while upon the carriage, into positionsto have slabs sawed therefrom to produce what is conventionally known as a cant in the manufacture of lumber.

Such log rolling is most conveniently accomplished by operating my devices in conjunction with the skid bars 14 which are accordingly raised shown in Fig. 2 to present an abutmentor stop for the lower por- B, for example, in turning the same by means of the arms Another function of the apparatus is the pushing of slabs from the carriage in any position of me earriage, and for transferring cants or sawed lumber from the carriage to the rollers 13 when the carriage is opposite the same. Still other important uses of the apparatus whether used independently of or in conjunction with the knees 8, log handling devices, etc, will it is thought, be apparent to sawmill operatives.

In addition to the advantages above referred to afforded by my invention in controlling logs, cants, etc, it obviates the relatively slow and laborious use of hand tools such as pickaroons, peevies, or the like, which have hitherto been utilized for such purposes.

What I claim, is,

1. The combination with a sawmill-carriage provided'with head-blocks, of devices adapted to be used interchangeably for work shifting and buffer purposes and carried on said carriage intermediate adjacent headblocks thereof, said devices each comprising an arm pivotally connected adjacent to one of its ends to the carriage, fluid actuating powers means connected to the other end of the respective arm, and means for regulating the action of the aforesaid power means whereby said arms are simultaneously moved into and out operable positions selectlvely.

2. The combination with a sawmill-carriage, of a plurality of arms pivotally connected at one end of each to the carriage adjacent to its inner side, power cylinders provided on the carriage, piston rods extending from said cylinders and connected to the respective arms, and means including valve devices whereby a fluid power medium is supplied. to and exhausted from opposite ends respectively of all of said cylinders to cause said arms to be moved into or from their operable positions selectively.

3. The combination with a sawmill-carriage provided with head blocks, of log turning and shifting devices mounted upon the carriage, said devices comprising a plurality,

. HENRY C. HILKE. Witnesses PIERRE BARNES,

M. G. SUPPLE.

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