US1368256A

US1368256A - Circular-saw guide

Info

Publication number: US1368256A
Authority: US
Inventors: Harris George Stanley
Original assignee: Individual
Current assignee: Individual
Priority date: 1919-09-04
Filing date: 1919-09-04
Publication date: 1921-02-15
Anticipated expiration: 1938-02-15

Description

G. S. HARRIS. ClRCULAR SAW GUIDE. APPLICATION FILED SEPT. 4. 1919.

1,368,256. Patented Feb. 15, 1921.

VEN 70A? 680/7: 5/00/ 7 War/7 UNITED STATES PATENT OFFICE.

GEORGE STANLEY HARRIS, 0F MORESBY ISLAND, BRITISH COLUMBIA, CANADA,

ASSIGNOR TO HOWARD B. HARRIS, OF FENDER ISLAND, CANADA,

CIRCULAR-SAW GUIDE.

Specification of Letters Patent.

Patented Feb. 15, 1921.

To all whom it may concern:

Be it known that I, GEORGE STANLEY HAR- nrs, a subject of the King of Great Britain, and a resident of Moresby Island, in the Province of British Columbia, Canada, have invented certain new and useful Improvements in Circular-Saw Guides,of which the following is a specification.

My invention relates to'improvements in circular saw guides, and the object of my invention is to provide a saw guide which is simple in design and construction and easily adjustable, which is powerful, cheap to manufacture, and the use of which enables the saw to be changed readily and quickly, without the use of any tools whatever, hesides eliminating entirely all danger to' the sawyer.

I attain this object by the construction illustrated in the accompanying drawings in which-- Figure 1 is a plan view of the guide.

Fig. 2 is a side elevation.

Similar figures of reference indicate similar parts throughout the views.

1 indicates the base of the guide, preforably constructed of sheet steel and provided with holes 2 and 3 adjacent each end whereby it may be bolted to the saw husk, these holes being slotted to provide for the longitudinal adjustment of the guide for different sized saws.

4 indicates a lug formed integrally on one side of the base provided with a pin 5 on which the guide levers 6 and 7 are pivotally mounted, these levers being formed at their outer ends as jaws 8 carrying tapered wooden plugs 9 and 10 between which the saw revolves when the device is in place. The lower lever 6 is extended at its opposite end and to the extended end is rotatably secured a screw 11 which is threaded through a lug 12 formed on the guide base, the screw being provided on its free end with a head 13 by means of which it'may be rotated and mounted on the screw is a disk 14 designed to be screwed against the lug to act as a lock nut for the screw in any adjusted position, from which it will be seen that, the lever 6 being pivoted at 5, operation of the screw 11 will swing the lever about its pivot and that the lever may be locked in any pivotally adjusted position.

The upper lever 7 is mounted on top of and extends to approximately intermediate and 10.

the length of, the lower one, and is slotted in the end, as at 15, so that it may be pivotally ad usted by the operation of a screw 16 mounted in lugs 17 and 18 and which screw is provided with a fixed collar 19 which normally engages the slot 15. The screw 16 is provided with a head 20 andlocking disk 21 similar to those of the screw 11 already descrlbed, and the lugs 17 and 18 which carry the screw 16 are formed integral with a plate member 22 hingedly connected at the end opposite thelug end to the lower lever 6, this plate member being provided with a slot 23 adapted to engage over an upstanding lug 24: secured to the lever B and provided with a hole through which a split'pin 25 may be passed to prevent inadvertent lifting ofthe member '22. l

26' indicates a lug-formed integral with the base which passes over the

levers

6 and 7 as shown so as to hold the levers rigid while in operation and thus prevent any vibration which might be caused by the friction between the saw and the wooden plugs 9 The manner in which the device is used may be described briefly as follows: The guide is bolted to the saw husk by means of bolts passed through the slotted holes 2 and 3, so that the head 13 of screw 11 is in a convenient position for operation by the sawyer, the saw then lying between the jaws 8 and when the saw is running at speed the jaws are moved in until the wooden plugs just touch the saw. Guiding of the saw through the log is effected by the rotation of screw 11 in the required direction, as the operation of this screw moves both levers 6 and 7 about the pivot 5, while should it be desired to change saws, the split pin 25 is withdrawn and the plate member 22 swung upwardly, thus disengaging the collar 19 from the slot and allowing the lever 7 to be swung out clear of the saw. The plugs 9 and 10 may be easily replaced by opening the jaws and tapping them on the small end, when they will drive'out easily from the tapered holes in the jaws, allowing new plugs to be inserted readily and quickly.

From the foregoing it will be seen that I have devised a saw guide which is simple, compact, and powerful and the use of which insures safety to the operator.

What I claim as my invention is 1. A saw guide comprising a base mem- 110 Q neeaese ber provided with a pivot, a long lever jawed at one end mounted adjacent said jaw on said pivot, a short lever disposed on top of the long one jawed at one end and slotted at the opposite end also mounted on said pivot, both of said jaws being arranged one on each side of the saw, a manually operable screw secured to the end of the long lever opposite its jawed end threaded through a lug carried by the base member, and a plate member hingedly connected at one end to the long lever and having mounted on its opposite end a manually operable screw provided with a traveling collar detachably engaging the slotted end of the short lever.

2. A saw guide comprising a base member provided with a pivot, a long lever awed at one end mounted adjacent said jaw on said pivot, a short lever disposed on top of the long one jawed at one end and slotted at the opposite end also mounted on said pivot, both of'said jaws being arranged one on each side of the saw, a manually operable screw secured to the end of the long lever opposite its jawed end threaded through a lug carried by the base member, a plate member 'hingediy connected at one end to the long lever and having mounted on its opposite end a manually operable screw provided member.

3. A. saw guide comprising a base member provided with a pivot, a long lever jawed at one end mounted adjacent said jaw on said pivot, a short lever disposed on top of the long one jawed at one end and slotted at the opposite end also mounted on said pivot, both of said jaws being arranged one on each side of the saw, a manually operable screw secured to the end of the long lever opposite its jawed end threaded through a lug carried by the base member, a plate member hingedly connected at one end to the long lever and having mounted on its opposite end a manually operablescrew provided with a fixed collar detachably engaging the slotted end of the long lever, means forpreventing inadvertent lifting of said plate member, and a lug secured to said base formed as a jaw in which both said levers are slidably engaged whereby vibration of the levers during operation of the saw is prevented.

Dated at Victoria, B. (1., Canada, this 9th day of Aug, 1919 A. D.

' GEORGE STANLEY HARRIS.