US1827034A

US1827034A - Cant hoister

Info

Publication number: US1827034A
Application number: US439145A
Authority: US
Inventors: Mendenhall Charles Heath
Original assignee: Individual
Current assignee: Individual
Priority date: 1930-03-26
Filing date: 1930-03-26
Publication date: 1931-10-13
Anticipated expiration: 1948-10-13

Description

Patented Oct. 13, 1931 UNITED STATES ApiiiriagNr oFFicl-z f CHARLES HEATH MENDENHAL'IV.; oF Hoja/Inn,4 LOUISIANA l CANT Hors'rnn y Application inea March 2e, 1930.` serial No; 439,145.

erations may be performed upon them, the

reserve timbers being lowered when occasion requires. t

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the resent invention appertains.

With the foregoing and other obgects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes mav be made in the precise embodiment of the invention herein disclosed, within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings Figure 1 shows in elevation, a device constructed in accordance with the invention;

Figure 2 is an elevation wherein the structure ibs viewed at right angles to the showing of Figure 1.

The numeral 1 marks the tracks on which moves the carriage 2 that carries logs 9 to a saw 3, the logs resting against an abutment 4 on the carriage 2, the resulting product being a completed timber which is shown at 5.

The saw 3 is carried by a shaft 6or otherwise, the shaft being journaled for rotation on the foundation 7. The skids that carry the logs down to the carriage 2 are marked by the numeral 8, and the logs, as aforesaid, are designated, by the numeral 9.

A frame 11 is provided. A horizontal shaft 12 is journaled in bearings 14 on the frame 11 and is prevented from moving endwise by collars 15. One end of a flexible element 16 is wound about the shaft 12, the flexible element being continued over pulleys 17 on the frame 11. On the depending lower endiof the fleirible element 16 is mounted. a

counter weight .18.

Alarge beveled pulley 19 is connected by a clutch 2O to the shaft12, and the clutch 2O is under the control of alever 21 fulcrumed on any accessible partof the frame 11.

v Friction pulleys 22 are mounted on a shaft v L27 which is driven by a belt 28 and

pulleys

29 and 30 from the sawl yshaft 6. The pulleys 22 are under the control of a`yoke'23, so that either of the pulleys 22 may be broughtinto engagement with the large pulley 19, the yoke 23v being mounted to slide on the shaft 27. A link 24is pivoted` to the yokel 23 and is' pivoted to a bell crank lever`25'that is fulcrumed on the frame 11. A depending handle 26 is pivoted to the bell crank lever. o

FeXible elementsl are wound on the shaft 12 and carry dogs 32 at their lower ends, the dogs 32 being adapted to be set into the logs 9 on the'skids 8. 1 y j yThrough the instrumentality of the handle 26, the bell crank lever 25,.the link 24, and

Vthe yoke 23, the appropriate one of the pulleys 22 may be brought into frictional engagement with the large pulley 19. There is then established a driving chain comprising the` pulley 10, the shaft 6, the pulley SO, the b elt 28, the pulley 29, the shaft 27, the appropriate yone of the pulleys 22, the large pulley 19, and the shaft 12, the flexible ele ments 31 being reeled on the shaft 12 and the log 9 being lifted on the carriage 2, into engagement with the abutment 4.

When the carriage2 is reciprocated, the

Vsaw 3 will cut a slab off the log. It is then necessary to turn the logv over, so as to have another slab cut olf it. This can be done by means ofthe flexible elements 31 and the dogs 32, the yoke 23 being shifted, of course, 4to bring about a reversal in the direction of rotation of the shaft 12, whenever necessary.

The general construction is such that much heavy peavey work will be done away with and when the log is squared up to make the t-imbershown at 5, the timber, or several timbers,.may be hoisted away, and supported on suspension elements or hooks 33, which are hingedly mounted onthe frame 11, it

being possible to hold several sawed timbers in reserve, so that further operations may be performed on them, or for any other purpose.

1n the event that the operator does not wish to use the device for some consider'- able period of time, there is no reason for having the large friction pulley 19 in rotation. Under such circumstances, the lever 21 is operated to disconnect the clutch 20, so that the pulley 19 will be disconnected from the sha-ft 12. `When the clutch 2O is thrown out, the shaft 12 will be rotated by means of the flexible element 16 and the weight 18, to unwind the chains 31 from'the shaft,12:,.and the lower thek dogs`32 into position to be engaged with the log.

The pulleys 22' may beI so shifted with respect to the pulley 19 that neither of the pulleys 22 will engage the pulley 19, and, then, the shaft 12 will remain at rest; or either of the pulleys 22 may be broughtinto engagement with the pulley 19, to secure a direct rotation of the shaft 12, or a reverse rotation of the said shaft.

Vlhe device forming the subject matter of this application is simple in construction, but it will dispense with much heavy peavey work, arounda saw mill, and will make it possible to operate the mill with fewer laborers. rl`he output of the mill will be increased, also.

Having thus describedthe invention, what is claimed is:

In a device of the class described, a-track, a sawmill carriage movable along the track, a saw atv the side ofthe sawmill carriage, a foundation, skids carried by the foundation and leading'to the saw, a sawv arbor carrying the saw and journaled on the foundation, the saw arbor being disposed at right angles to the tracks and to the saw', a frame upstanding above the skids, a first shaft disposed at right angles to the sawarbor and journaled on the frame, above the saw shaft, first flexible elements wound about the rst shaft, logengaging means carried by the flexible elements, in operative relation 'to the skids, a second flexible element wound about the first shaft and'operating counter to the first flexible elements, aweight attached to the second flexible element, a second shaft disposed at right angles to the first shaft and journaled on the frame, means for rotating the saw arbor, an operative connection between the second shaft and the saw arbor, a first bevelled wheel loose on vthe first shaft, a clutch connecting the first bevelled wheel with the first shaft, yoke vslidable longitudinally on the second shaft, means under the control of anoperator for sliding the yoke, bevelled wheels -on the second shaft and movable, one at a time, by the yoke, into eng-agement with the firstbevelled wheel, and suspension elements on the frame,

CHARLES HEATH MEN DENHALL.