US788957A - Saw-handle fastening. - Google Patents

Description

No. 788,957. I PATENTED MAY 2, 1905.

' L. E. SMITH.

SAW HANDLE FASTENING.

APPLICATION FILED JUNE 11,1904..

1 4/0 71 v 79 l ivy/2% T NIH UNTTED STATES Patented May 2, 1905.

PATENT @rrrcn.

SAW-HANDLE FASTENING.

SPECIFICATION forming part of Letters Patent No. 788,957, dated May 2, 1905.

Application filed June 11,1904- Serial No. 212,147.

To all whmn it may concern.-

Be it known that I, LUTHER E. SMITH, a citi- Zen of the United States of America, and a resident of Shelburne Falls, in the county of Franklin and State of Massachusetts, have invented certain new and useful Improvements in Saw-Handle Fastenings, of which the following is a full, clear, and exact description.

This invention relates to saw-handle-fastening devices; and it has for one of its objects the provision of such a device which may be readily attached to and removed from the sawblade.

My invention has, furthermore, for its object the provision of means whereby saws of different widths may be clamped in the handle portion, the necessary change being easily and rapidly effected.

My invention has, furthermore, for its object the combination, with the saw-receiving member, of a clamping member cooperative with the former in firmly attaching the handle to the saw-blade.

A further object of my invention may be attained by the peculiar construction and organization of the clamping member, which constitutes also a means for preventing accidental rotation of the device when in place on the saw and is so organized as to leave the handle proper entirely free and unchanged.

My invention is clearly illustrated in the accompanying drawings, in which similar characters denote similar parts, and in which Figure 1 represents a saw-blade with handles embodying my improvements. Fig. 2 is a central section of the handle, showing the manner in which the saw-blade is held. Fig. 3 is a view taken in a plane at a right angle relative to Fig. 2. Fig. 4 is a detail view of the saw-receiving member or strap, and Fig. 1 represents a modification thereof.

In the drawings, S denotes a saw-blade having the usual uncut end portion S, adapted to enter a saw-receiving member, consisting in the preferred form thereof shown of a rigid strap 10, open at its upper end to straddle the reduced end 11 of an adjustable holder 12, shown herein as a bolt in screw-threaded engagement with a ferrule 13. The upper end or hub 14 of this ferrule is chambered out to receive the handle 15 whereby the sawblade is manipulated.

Pivotally supported between a pair of ears 16 at 17 is a clamping member 18, adapted to be swung upward to the position shown by dotted lines in Fig. 2 to permit the saw end S to be entered into the strap 10, and the pivoted end of the clamping member is formed eccentric, so that when the lever portion 18 is depressed the saw-blade is firmly clamped in position. The under surface of the clamparm 18, which engages the top edge of the saw, extends very slightly beyond a line perpendicular to said edge and passing through the center of the arm-pivot 17, so that the cam-ended lever-arm in coming to the position shown in Fig. 20f the drawings is brought to such position by having the most salient point of the binding-cam crowd itself to place, and tendency of the lever to be self-releasing is obviated. In order to safeguard .,against any lateral movement of the lever end 18 relative to the upper edge of the saw, said lever is provided with a groove 18, the walls of which are disposed at opposite sides of the blade, and therefore keep the blade S and the lever 18 in proper alinement.

Means are provided for balancing the point of support of the saw in relation to the clam ping-point, these means consisting of a downwardly-extending grooved flange or projection 19, against the lower edge of which the saw-blade rests at a point opposite the clamp 18, thus insuring rigidity of the ferrule 13.

In Fig. 4 I have shown a modified form of the receiving member, which here consists of a hanger 20, having a slot 21 for the reception of the saw-blade.

From the foregoing description it is obvious that the clamp may be operative on sawblades of different widths, inasmuch as the distance between the saw-supporting face 11 and the ferrule flange or projection 19 and clamp 18 may be varied by turning the hangersupport 12 in the proper direction.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. The combination, with a ferrule having a saw-engaging ledge, and a saw-receiving I O a saw-engaging ledge, and a slotted saw-hanger in screw-threaded engagement therewith, of a clamping-lever having a groove for engaging said saw-blade.

Signed by me at Shelburne Falls, Massachusetts, in presence of two subscribing witnesses.

LUTHER E. SMITH.

Witnesses:

RODERICK J. RUSSELL, CLIFTON L. MOKNIGHT.

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