US1113591A

US1113591A - Handsaw.

Info

Publication number: US1113591A
Application number: US82234114A
Authority: US
Inventors: Joseph Wood
Original assignee: Individual
Current assignee: Individual
Priority date: 1914-03-04
Filing date: 1914-03-04
Publication date: 1914-10-13
Anticipated expiration: 1931-10-13

Description

J. WOOD.

HANDSAW.

APPLICATION FILED MAR.4, 1914.

1,113,591, Patented 0ct.13,1914.

THE NORRIS PETERS C0,. PHOTOLITHO" WASHINGTON. D. C.

UNITED STATES PATENT OFFICE.

JOSEPH woon, or EVERETT, ivrnssacnosn'rrs.

I-IANDSAW.

AppIication fiieaivrareaa'. 1914. sa is No. 822,341. ,7

To (ZZZ whom it may concern.

Be it known that I, J osnrrr 001), a citizen of the United States, and a resident of Everett, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Handsaws, of which the following is a specification.

This invention relates especially to a hand saw for the use of butchers, the saw comprising a frame, a saw blade and mechanism for straining the blade to fit it for use and for loosening the blade to permit its removal.

The invention has for its object to provide an improved construction enabling the blade to be quickly tightened and loosened and providing a saw which is suitably strong, simple and durable.

The invention consists in the improvements which I will now proceed to describe and claim.

Of the accompanying drawings forming a part of this specification: Figure 1 represents a side view of a saw embodying my invention, the blade being strained; Fig. 2 represents a side view of a portion of the saw, the blade being loosened and a part of the handle being broken away; Fig. 3 represents a section on line 33 of Fig. 1; Fig. 4 represents a section on line l4e of Fig. 1; Fig. 5 represents a section on line 55 of Fig. 1. i

The same reference characters indicate the same or similar parts in all of the views.

My improved saw comprises a rigid frame composed of a back 12, an outer arm 13 adapted to detachably engage the outer end of a saw blade 14, and an inner arm 15 carrying a strainer lever hereinafter described, said backing arm being preferably,

made from a single bar of steel formed as shown by Fig. 1.

To the outer end of the arm 15 is connected by a pivot pin 16 an ear 17 formed on a lever 18, the arm 15 being slotted as shown by Fig. 5 toreceive the ear 17. The lever 18 has a downwardly projecting shorter arm with which the inner end of the blade 1-1 is engaged at19, and an upwardly projecting longer arm.

20 represents a handle adapted to be grasped by the operator and having a slot inits forward portion, the sides of said slot constituting two ears 21 which bear on 0pposite sides of the frame. The body of the handle'ispreferably made of wood and the slot is preferably provided with a metallic lining composed of side members 22 and a back member 23 formed as shown by Fig. 2.

The lining members are attached to each other and to the wooden body of the handle by transverse screws or rivets 24. The

upper forward portions of the cars 21 are hinged to the frameby means of a pivot pin or stud 25, which holds the inner sides of theears or the lining members 22 thereof in close sliding contact with the sides of the frame, as shown by Fig. 4-; The inner end of the 'slot orthe lining member 28 therein has an elongated outer surface constituting an abutment which is in sliding contact with the longer arm of the straining lever 18. Said longer arm is arranged to enter the slot and bear on the said abutment.

hen the handle is swung from its operative position, as indicated by Fig. 2, the lever 18 is held by the blade in a position inclined relatively to the abutment, the

blade being therefore loose and adapted to be removed from the frame. When the handle is swung to its operative position relatively to the frame, as shown by Fig. 1, the abutment slides in contact with the lever 18 and forces saidlever to the position shown by Fig. 1, its shorter arm being thus moved away from the outer frame arm 13 and caused to strain the blade, the lower portions of the ears 21 of the handle being at the same time caused to bear on opposite sides of'the inner framearm 15. It will now be seen that when the handle is in its operative position the lever 18 is .held

thereby in its straining position, the longer arm of said lever and the inner frame arm '15 being at the same time located in the handle slot so that the frame arm 15 supports the handle against lateral twisting movementsand prevents strain on the pivot 25, the longer arm of the straining lever 18 being at thesa-me time covered and securely protected against sidewise displacement.

Specification of Letters Patent. t ht t 3, 1914,

' Means are provided forisecuring the handle in its operative relation to the frame, said means preferably including a detent 28 which may be formed. on the linlng member 23 andislocated adjacent to thepivot 16 of the straining lever, and a U-shaped latch 29, which is secured by and ad ted to swing, on the pivot 16, the neck po -h the latch being adapted to frictionally engage the rear side of the detent 28, as shown ion of r downwardly out of engagement with the de tent 28.

The longer arm of the straining lever 18 is preferably provided with an adjustable runner 30 adapted to bear on the elongated abutment, said runner being preferably the head of a screw, the threaded shank 31 of which is: engaged with a tapped orifice in the longer arm of the lever 18. By turning said screw to adjust the head or runner, 30 outwardly from the edge of the lever 18 the tension imparted to the blade by the described'operation is increased.

It will be seen that the described construction issimple, strong and durable, and enables-the blade to be quickly and tightly strained and as quickly released. The slotted handle forming the ears 21 which bear on oppositesides of the frame and its arm 15 so that the frame supports the handle against twisting strains is an important feature of my invention, said ears also forming a housing or casing for the longer arm of the straining lever. The elongated abutment at the inner end of the'slot in the handle is also an important feature, said abutment adjustment applying pressure to the lever moving the latter to its straining positio'n- Having described my invention, I claim:

1. A saw comprising a rigid frame having a back, a blade-engaging outer arm, and a lever-carrying inner arm,a handle having a slot in its forward portion, the sides of which form ears pivoted to the frame and bearing on opposite sides thereof, the inner end of said slot constituting an elongated abutment, a lever fulcrumed on the inner frame arm and having a shorter blade-engaging arm and a longer arm adapted to ex tendinto said slot andbear on said abutment, the handle being adapted to swing to and from its operative position relatively to theblade, and the lever being moved to a blade-straining position by the abutment whenthe handle is moved to its operative position, and means for confining the handle in said position.

2. A saw comprising a rigid frame having a back, ablade-engaging outer arm, and a lever-carrying inner arm, a handle having a slot in its forward portion, the sides of which form ears pivoted to the frame and bearing on opposite sides thereof, the inner end of said slot constituting an elongated abutment, a leverfulcrumed on the inner frame arm and having a shorter blade-engaging arm and a longer arm adapted to extend into said slot and bear on said abutment, the handle being adapted to swing to and from its operative position relatively to the blade, and the lever being moved to a blade-straining position by the abutment when the handle is moved to its operative position, a fixed detent on the handle adjacent to the fulcrum of the lever, and a latch pivoted to the inner frame arm and adapted to engage said detent to confine the handle in its operative position.

3. A saw comprising a rigid frame having a back, a blade-engaging outer arm, and a lever-carrying inner arm, a handle having a slot in its forward portion, the sides of which form ears pivoted to the frame and bearing on opposite sides thereof, the inner end of said slot constituting an elongated abutment, a lever fulcrumed on the inner frame arm and having a shorter blade-engaging arm and a longer arm adapted to extend into said slot and bear on said abutment, the handle being adapted to swing to and from its operative position relatively to the blade, and the lever being moved to a blade-straining position by the abutment when the handle is moved to its operative position, and means for confining the handle in said position, the longer arm of the lever being provided with an adjustable runner contacting with the abutment whereby the tension of the blade may be regulated.

1. A saw comprising a rigid frame having a back, a blade-engaging outer arm and a lever-carrying inner arm, a handle composed of a wooden body having a slot in its forward portion forming two cars, and a metallic lining in said slot, the sides of the lining bearing on opposite sides of the frame, and a lining at the inner end of the slot constituting an elongated abutment, a pivot pin connecting said ears and the sides of the lining with the frame, and a lever fulcrumed on the inner frame arm and having a shorter blade-engaging arm and a longer arm adapted to extend into said slot and bear on said abutment, the handle being adapted to swing to and from its operative position relatively to the blade, and the lever being moved to a blade-straining position by the abutment when the handle is moved to its operative position, and means for confining the handle in said. position.

In testimony whereof I have aflixed my signature, in presence of two witnesses.

JOSEPH WOOD.

Witnesses ARTHUR H. BnowN, P. W. Pnzznrrr.

Copies o this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, 110.