US671488A - Handsaw attachment. - Google Patents

Description

No, 67|,488. Patented Apr. 9, 190|.

E. A. mcH'ALscHEck. HANDSAW ATTACHMENT.

(Applicntion led Feb. 8, 1901.)

(No Model.)

UNITED l' STATES A PATENT OFFICE.

EMIL A. MICHALSCHECK, OF BIGSTONE, SOUTH DAKOTA.

HANDSAW ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 671,488, dated April 9, 1901.

Application tiled February 8, 1901.V Serial No. 46,549.' (No model.)

T0 a/ZZ whom t may concern:

Be it known that LEMILAMICHALSCHECK, a citizen of the United States, residing at Bigstone, in the county of Grant and State of South Dakota, have invented a new and useful Handsaw Attachment, of which the following is a specification.

This invention relates to handsaws; and it lhas for one object to provide a construction of handle and an attachment therefor wherewith the sawdust will be blown away during the sawing operation to clearly expose the line on which the sawing is to be done, a further object of the invention being to provide such a construction as will insure automatic operation of the blowing attachment.

In the drawings forming a portion'of this specification, and in which like numerals of reference indicate similar parts in the several views, Figure l is a side elevation showing a portion of a handsaw and illustrating in section an air-pum p attached thereto in position todischarge air over the teeth of the saw, at the handle end of the latter. Fig. 2 is a transverse sectional view through a portion of the saw-handle and through the barrel of the airpump.

Referring now to the drawings, there is shown a handsaw, including a blade 5 and a handle, which latter includes a body portion G, attached to the saw-blade in the usual manner, and a grip 7. The grip 7 is formed separate from the body of the handle and at its upper end-that is, the end adjacent to the back ofthe saw-it is hinged to a projecting lug 8 of the body 6 through the medium of a common form of hinge 9. Thus the grip may be freely moved with the lower end thereof in the plane of the'bl'ade and toward and away from the body of the handle.

Upon one side face of the body 6 of the handle, and at the lower end thereof adjacent to the blade 5, there is mounted rigidly the barrel 10 of an air-pump, said barrel being disposed slightly inclined, with its discharge end in the direction of the teeth of the saw, and at said discharge end of thepump there is connected a flexible dischargepipe ll, of lead or similar material, which may be easily bent to direct the discharge of air to the exact point desired. l

In the barrel of the pump is a piston 12, having a rod 13, which leads from the rear end of the pump and is disposed in a recess in the grip 7 and in which it is held by means of a set-screw 14C. Y

With this construction it will be seen that when the saw is pushed forwardly through lthe medium of the grip the piston or plunger Ais moved forwardly through the pump-barrel to discharge the air therefrom along the sawblade and past the teeth thereof, so that the air will strike the material being sawed and on the line along which the saw isprogressing, so that the sawdust will be blown away. When the saw is drawn in the opposite direction, the handle has initial lost motion, at which ti me the piston or plunger is drawn rearwardly through the pump-barrel to fill it with air ready for the next forward stroke. Thus as the saw is operated the pump-piston is reciprocated for the purpose designed.

It will be understood that in practice modifications of the specific construction shown may be made without departing from the spirit of the invention.

It will be noted that the pump-barrel is provided with a cap which acts as a stop for the piston and li mits the outward-swinging move.

ment of the grip 7, and by adjusting the piston-rod in the recess in the grip the throw of the plunger or piston may be varied, as understood, and the pivotal movement of the grip determined.

What is claimed is- 1. The combination with a saw having a handle including relatively-fixed and movable members, of a pump-barrel mounted upon one member of the handle,and a plunger for the barrel operatively connected with th other member of the handle.

2. The combination with a saw having a handle including a member Xed to the sawblade and a member pivoted to the fixed niember, of a pump-barrel mounted upon the xed member and having a plunger operatively connected to the pivoted member.

3. The combination with a saw having a handle including a member xed to the blade and a, grip member hinged et one end to the fixed rnember,of a pump-barrel mounted upon the fixed member with its discharge directed to the saw-teeth, and a plunger for the barrel and having operating connections with the free end of the grip member.

VIn testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two Witnesses,

EMIL A. MICHALSCHECK. Witnesses:

JOHN MICHALSCHEOK, ANTON MILLER.

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