US1486808A - Portable saw - Google Patents

Description

c. E. SMITH vPORTABLE: sw`

March 11 `1924,

or" a F'i d Ma; l1921 J-gIl-n 1 16 v 17 l ya Patented Mar. 11, 1924.

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CURTIS E. SMITH, OF ST. JOSEPH, MISSOURI.

PORTABLE SAW.

Original application filed May 17, 1921, Serial Nlo.y 470,333. Divided and this application filed July 31,

1922. Serial No. 578,7195. y

To all whom t may concern.'

Be it known that I, CURTIS E. SMITH, a citizen of the United States, residing at St. Joseph, in the county of Buchanan and State of Missouri, .have invented certain new and useful Improvements in Portable Saws, of which the following is a speciiication.

This invention relates to devices for sawing materials such as wood, and is more particularly directed to an adjustable bed for supporting the materials in a number of positions.

An object of this invention is to Aprovide an adjustable bed for supportingmaterial to be sawed in a number of diil'erent adjustable positions, whereby any cut of the material desired may be had, the adjustment being such that the material may be provided with a longitudinal groove, thus forming a 2o cut without entirely ripping` through the thickness of the material.'

Another object of the invention is the provision of a mitre gage in connection with the adjustable bed whereby different kinds of mitreV joints may be ha With the foregoing and other objects in view which will appear as the description proceeds, the invention consists of certain novel details of construction and combination of parts which will be hereinafter more fully described and pointed out in the claims, it being understood that various changes may be made in the construction and arrangement of the parts without departing from the spirit or sacrificing any of the advantages of the invention as set forth in the appended claims.

In the drawing Fig. 1 isa View in perspective of the adc justable table or bed showing longitudinal grooves and a mitre gage anda straight gage used in connection therewith. i

Fig. 2 is a perspective view of a modified form of bed with one side inclined at an angle of degrees to the other side.

Fig. 3 is a cross section of Fig. 1.

Fig. 4 is a cross section of Fig. 2.

In order to provide awider range` of usefulness, 'and for the convenience in the operation of my saw described and claimed in my application iiled May 17, 1921 Serial No.

470,333, onwhich Patent No. 1,450,459 was granted April 3, 1923, of which the present application is a division, I have provided the r bed of my saw casing 1 with a bed plate 2 pivotally connected at one end to the casing by means of two studs 14 projecting from the side of the casing and engaging in slots 14a in side members 15 as shown in Fig. 2. These side members extend from the underside of the bed plate and in spaced relation to each other, and are adapted to engage the sides of the casing to hold the bed plate in position. Nuts 18 engage the threaded ends of the studs 14 for locking one end of the side members 15 in position. In the end-of each of the side members 15 opposite to the slots 14- are slotsl adapted to receive bolts 17 fastened in the side of the casing having on their ends nuts 18. By means of these slots,` bolts and nuts, the bed plate may be adjusted to diierent angular positions in relation to the top of the housing 1. The slots 14a permit a slight sliding movement of the bed plate when it is adjusted by mea-ns of the bolts operating in their respective slots.

On the top face of the bed plate, I have provided on each side of a saw slot 3 therein, longitudinal grooves 19 adapted to receive a tongue 20 of the mitre gage 21 shown in Figs. 1 and 3. The mitre gage is made of any suitable material with its forward end sheared off at an angle of 45 degrees and its upper face 29 inclined at the same angle to its lower face. At the outer edge of the mitre gage there is a downwardly and inwardly extending lip 22 which engages the edge and part of the under face of the bed plate to hold it in place. When it is desirable, this mitre gage can be locked in position by means of a ythumb screw 23, but when I am using the mitre gage for the purpose of holding and positioning the material sawed, the screw is not in use. Otherwise, the tongue 20 operating in the groove 19 coopcrates with the lip 22 engaging the longitudinal edge of the bed plate for holding the gage on the bed plate when being adjusted longitudinally of the said plate.

Vhen I desire to saw-material of a definite width, I place on one side of my bed plate a straight gage 24 which can be adjusted upon the bed plate and so held by means of athumb screw 24.

In the operation of the adjustable bed and mitre gage 21 for forming cuts of various widths, lengths and depths, the material 'is placed in position on the mitre portion 29 of the gage after the mitre 21 has been E! 1,4se,eos

properly adjusted. The bed 2 is likewise adjusted to determine the depth of the cut made by a saw operating through the slot 3. The timber is then moved forwardly into the saw when the desired out is made.

In practice, l have found it often con- Y.

venient to cut what I call a reverse mitre. For this purpose, I have provided a secondary bed plate 26 of the shape shown in Figs. 2 and fl, a portion 27 of which is horizontally disposed with a portion 28 inclined at an angle or" a5 degrees to the horizontalvpart,

the line of intersection between the-inclined portion 28 and the horizontal portion being in alinemeiit with the saw when said bed is located in operative relation with thetop ot the easing lf ln this case the table should be so mounted with the horizontal portion spaced above the housing that the under ace of the inclined portion will not contact with the upper end ot the housing, as shown in Figure 4f. The bed plate shown iii Figs. 2 and 4 is provided with gi'ooif'es l5), same as those shownin Fig. l and for the saine purpose, the mitre gage being adaptedi'or use upon this forni as wellas that shown in Fig.V

1. By use of the mitre gage 2l, shown in Fig. l, on'the inclined portion of the bed shown in Fig. 2 l can out a double initre oint. Y The ordinary'double mitre joint is formed by properly adjusting the mitre gage 2l in position on the inclined portion 28 of the bed 26. The material is placed on the mitre element 29 of the gage 21 so that the longitudinal edge of the timber will be alined with the saw. Y Y Y Y As the material is moved lengthwise of the bed and in tace to Vtace engagement with theV ,plate mounted on the housing and adjustable verti'cally andV longitudinallyT oi the top oi said liousiii0'.lonffitudinal grooves` in the bed 2:. c h

plate, a mitre gagehaviiigi a Vdepending toiigue'slidable iii a groove, nie-ans on the gageVV embracing a longitudinal edge ot theV bed ilate and coo eratinv with saidtonvue n -a n b n n u b n sliding .in the groove for maintaining said gage in position on the bed plate, said gage lia-ving an inclined :tace adapted `to support a piece of material to be sawed and a saw slot centrally7 disposed in theibed plate and in line'with the Vinner edge of the gage.

v2. In a portable saw, a housing, a bed plate Y -mountedonthe bed plate. Y* i Y i In testimony whereof I atliX my signature.

mounted on the housing and adjustable vertically and longitudinally of the top of said housing, longitudinal grooves in theV bed plate, mitre gage having a depending Y tongue slidable'in a groove, with a portion of the gage extending beyond the longitudinal side edge of the bedfplate and around and beneath said bed plate and embracing a longitudinal edge of the bed plate and'cooperating with said tongue'sliding in the groove ffor maintaining said gage in position on the bed plate, said gage having an inclined face adaptedto support a piece ot material to be saived and a saw slot centrally disposed in the bed plate and in line with the inner edge oit' the gage, and means'orloching the gage in position on the bed plate,V

3. ln a portable saw, a housing including :two side walls spaced to receivethe sawbetween theni, a bed plate mounted on the housing and adjustable vertically and longitudinally of the top of said housing, said bed plate having a horizontal portion and a portion inclined downwardly at an angle tothe horizontal p'oitio'n'the anglebeing adjacentY the plane-ot a saw between the housing walls with ythe lnjirizontal'portion Yspaced from the top of the housing, longitudinal grooves in the bedplate, a-mitre gage having a depend-V ling tongue'slidable ina groove, means on the Vgage embracing a longitudinal edge of the lied plate andicoopeiatiiigwith saidtongue sliding in the groove for maintaining said having an inclined tace adapted to support apiece of -inatcrial to be saw'ed andl a saw slot centrally disposed in the bed plate and in line with the inner edgevot the gage.

el.. In a portable saw, a housing including vtwo sidewalls spaced to receive the saw besoi soY

`gage in position-onthe bed plate, said gage llltl tween them, a bed plate mounted on the housing ha'vinga horizontal portion Vthe angle bc- ;ing adjacent the'plane of a'saw vbetween the housing VVwalls* and a portion'inclined Y downwardly at an angle tothe;horizontalportion with the horizontal portion'r'spaced troni the top ot the housing.

5. ln a portable saw, a housing including two side walls spaced to ieceivethesaw 'bei Vtween them, a `bedplatejfnionnted oiiftheV lll) housing 'and adjustable vertically Yand longiv tudinally of the top ofrsaid housing,sai d bed platehaving Va horizontal portion and a portion incliiieddownwardly atVV an angle to the Y horizontalA portion Ytherangle being adjacent v the plane oitl a saw between the liousinglwalls with the horizontal portionfspaced i'roin the top of the housing,longitudinal grooves -inV the bed plate andra mitre gage Vslidrably i CURTIS'E. SMITH. Y

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