US1359386A - Adjustable speed-controlling device for log-chtjtes - Google Patents

Description

0. W. JOHNSTON. ADJUSTABLE SPEED commoume DEVICE FOR LOG CHUTES.

APPLICATION FILED JULY 23,1919.

JIM/6n for cfa/znaiwz Patented Nov. 16, 1920.

. 0. w. JOHNSTON. ADJUSTABLE SPEED CONTROLLING DEVICE FOR L0$ GHUTES.

APPLICATION FILED JULY 23, I919. 1 ,359,386, Patented Nov. 16, 1920.

I 2 SHEETS-SHEET 2- In (/6 74 $0 r 0. Hdfihnatan UNITED STATES PATENT OFFIE..

OMER w. JOHNSTON, or LIBBY, MONTANA, ASSIG-NOR or ONE-HALF To LARMON G. ToWNsENi), or LTBBY, MONTANA.

ADJUSTABLE SPEED-CONTROLLING DEVICE FOR, LOG-CI-IUTES.

To all whom it may cdncern:

Be it known that I, OMER V. JOHNSTON, a citizen of the United States, residing at Libby, in the county of Lincoln and State of Montana, have invented certain new and useful Improvements in Adjustable Speed Controlling Devices for Log-Chutes; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to means of retarding the speed of logs by adjustable control in passing through log chutes.

An important object of this invention is to provide an adjustable speed checking device for log chutes which may be safely operated at a point spaced considerably from the chute.

A further object of the invention is to provide an adjustable speed checking device for log chutes capable of withstanding the great strain incident to abruptly stopping logs in their passage through the chute.

A further object of the invention is to provide an adjustable log check device consisting of a plurality of dogs set at an angle and adapted to engage the logs in passing through the chute, the inclination of the dogs being adapted to more tightly draw the log into contact with the bottom of the chute.

A further object of the invention is to provide a device of the character described which is simple to operate, adjustable of control, reliable in use, and cheap to install in log chutes of the standard construction.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this application and in which like numerals are employed to designate like parts throughout the same,

Figure 1 is a fragmentary side elevation 4 of a log chute having my improved log checking device applied thereto,

Fig. 2 is a plan view of the same,

Fig. 3 is a bottom plan view of the same,

Fig. 4 is a transverse section taken on line 4-4 of Fig. 1, and,

Fig. 5 is a perspective of one of the log engaging dogs.

In the drawings wherein for the purpose Specification of Letters Patent. P t t Nam 1 192@ Application filed July 23, 1919.

Serial No. 312,795.

nally extending inwardly inclined timbers 11 adapted forslidably supporting logs. As is obvious the upper end of the chute is arranged at the receiving point for the logs and the lower end of the chute is arranged at the discharge point for the logs.

The upper faces 12 of the timbers 11 are inclined inwardly and have their opposed sides spaced to permit of the discharge of any particles which may drop from the logs. The inner edge portions of the timbers 11 are provided with inwardly inclined tubes 13 receiving dogs 14. As indicated in Fig. 1 the dogs are set at an acute angle to the longitudinal axis of the logs, preferably at about 85 degrees. The upper ends of the dogs 14 are inclined as indicated at 15 to provide penetrating points 16. The angular disposition of the dogs 14 with relation to the logs passing through the chute causes the logs to move in very close contact with the chute upon being engaged by the dogs. As indicated in Fig. 5 the dogs 14 are provided on their forward sides with channels 17 adapted to receive bark or other particles of wood deposited within the tubular members to prevent the dogs from jamming within the tubular members.

The dogs 14 may be adjusted to the desired position with respect to the inclined surfaces 12 of the timbers 11.

The operating means for the dogs include a pair of levers 18 having eyes 19 in their outer end portions and receiving bolts 20 of a lesser diameter of the interior diameter of the eyes. The connection between the levers 18 and the bolts 20 permits of the pivotal movement of the levers. The dogs 14'are provided in their lower portions with slightly ofiset eyes 21 receiving the operating levers 18. Nuts 22 have threaded engagement with the bolts 20 and may be regulated for adjusting the position of the levers 18.

As indicated in Fig. 1, an operating arm 23 has its forward end portion mounted on a transverse support 24 secured to one of the beams 11. A pin 25 carried by the upper side of the transverse member 24 extends through an opening 26 in the arm 23 and serves to pivotally connect the arm 23 to the member 24. The intermediate portion of the arm 23 supports the overlapped end portions of the levers 18 and is adapted to be elevated or lowered as desired for regulating the position of the dogs 14. A pulley 27 secured to the under side or" the chute supports a.

flexible element 28 connected to the rear end portion of the arm 23. The flexible element 28 is of rope or any other desired material and extends to a point spaced from the chute. The operator of the chute may regulate the positions of the dogs 14 by operating the flexible element 28.

One or more adjustable speed controlling devices may be operated from a single point. Protector aprons 29 are provided for the upper sides of the dogs and reinforcing plates 30 are provided for the lower sides of the dogs. The reinforcing plates 30 are countersunk in the chute and are adapted to prevent the dogs 14: from splitting the chute.

While l have shown and described the preferred embodiment of my invention, it is understood that I may make such minor changes in arrangement and construction of parts as will remain within the spirit of the invention and the scope of the appended claims.

Having thus described my invention, what I claim is l. The combination with a log supporting chute including log supporting means, of a plurality of log engaging members extending above and below the log supporting means, levers connected to said log engaging members, means to support the levers, said levers being overlapped an operating arm pivoted to the chute and supporting the overlapped portions of said levers, and a regulating element connected to said operatmg arm.

2. The combination with a log chute ineluding log supporting means, of a plurality of dogs extending through the log support ing means and having their lower end portions provided with eyes, levers extended through said eyes and having their inner end portions overlapped, means to support the outer end portions of the levers, and an operating member connected to the overlapped portions of said levers.

'below the log supporting means, levers connected intermediate their ends to sald logv engaging members, means to adjustably and pivotally support the outer end portions of the levers, the inner end portions of said levers being overlapped, an operating arm having its forward end portion pivoted to the chute and supporting the overlapped portions of said levers intermediate its ends, and a regulating element connected to the rear end portion of said arm.

In testimony whereof I aflix my signature in presence of two witnesses.

OMER w. JOHNSTON- Witnesses L. G. TowNsnNn, DAVID BOYLE.

Images