US1235403A - Guard. - Google Patents

Description

D. C.'WEAVER. GUARD APPLICATION FILED OCT. 20. 1916.

1 ,235,403. Patented July 31, 1917.

2 SHEETSSHEET I.

atfoznw D. C. WEAVER.

GUARD.

APPLICATION FILED OCT. 20. 1816.

1 35,403; Patented July 31, 1917.

2 SHEETS-SHEET 2.

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DAVID CLARK WEAVER, or SALEM, OREGON, nssieiion 0E own-HALE ro susaiv J.

WEAVER, or SALEM, OREGON.

GUARD.

Specification of Letters Patent.

Patented July 31, 1917;

To all whom it may concern Be it known that I, DAvID C. WEAvER, a citizen of the United States, residing at Salem, in the county of Marion and State of Oregon, have invented new and useful In1- provements in Guards, of which the following is a specification.

The invention relates to an improved guard designed for use in wood working machines, particularly with planers of the type known as jointer or bur planers.

The improved guard is designed to cover and protect the knives at all times, except when in actual use, whereby it is impossible for the workman to become injured by the knives.

The invention in the preferred form of de tails will be described in the following specification, reference being had particularly to the accompanying drawings, in which Figure l is a plan view showing the plan ing machine with the improved guard applied thereto.

Fig. 2 is a side elevation of the same.

Fig. 3 is a side elevation from the opposite side.

Fig. at is a perspective view of the guard proper and connection.

Fig. 5 is a plan view of the guard extended.

Fig. 6 is a transverse section through the guard.

Referring particularly to the accompanying drawings, the improved guard comprises a metallic member 1. the side edges of which are divergent from the supported end of said member to provide a comparatively wide operative end :2. The under side of the member 1 is recessed at 3. said recess opening through the outer side of the member and through the inner end providing an abutting wall 4 at the inner side of the member, as shown. An adjusting plate 5 is movably fitted in the recess 3, and adjustable laterally with relation to the main memher 1, being formed with a series of open ings 6 adapted to cooperate with the pin 7 depending from the main member, whereby the plate may be held at variable lateral adjustments with respect to the main member, for a purpose which will later appear.

The guard including a main member 1 and an adjusting plate 5 is rotatably supported upon a shaft 8 having a reduced upper end 9 to seat in registering openings 10 in the adjusting plate and main member, the opening in the plate being formed with lateral recesses 11 to receive the cross pin 12 mounted in the shaft, whereby the shaft and plate are fixed against independent movement. A. set screw 13 passes through an opening in the top of the main member and is threaded into the end of the shaft to secure the parts against endwise separa tion.

The shaft 8 is rotatably mounted in the opening 14 formed in the top 15 of the planer in advance of the planing knives 16, so that the operative end of the guard overlies and protects said knives being held against fixed guide 17 through the medium of an operating means, including a rod 18 removably inserted in the opening 19 formed transverse the shaft and extending transverse the planer top beneath the same. The rod is headed so that it may be freely removed from the shaft in one direction, the opposite end of the rod being formed with a notch 20 to receive one end of the cable 21, the opposite end of which is connected to the weight 22 passing over the guide pulley 23 secured to the planer. The weight operates to exert sufiicient pull upon the rod 18 to maintain the guard overlying the knives and against the fixed guide.

In operation, the guard will efiectively protect the knives, maintaining them covered except during actual use, it being understood that the material to be operated upon is introduced alongside the edge of the guard and displaces the same as it is advanced to be engaged by the knives. When the guide 17 has been adjusted to give a wider cut the guard may be correspondingly increased in size by adjusting the plate 5 with relation to the main member as heretofore described.

For convenience, in dismantling the guard, I provide hook 25 adjacent the weight connection, so that the latter may be suspended, the cable end removed from the rod 18, the latter removed from the shaft opening and the guard and shaft together removed from the planer top.

What is claimed is 1. A guard for planer knives operating through a planer table, comprising a vertical shaft rotatably mounted in the table remote from the knives, means for maintaining rotative tension on the shaft in one direction, a guard for the knives including a main plate arranged to cooperate with the shaft, with interlocking means on the plate and shaft to hold the plate against in-, dependent rotary movement on the shaft while permitting free longitudinal movement of the plate in one direction, a second plate mounted for rotative movement on the shaft, the ends of the plates remote from the shaft and adjacent the knives being arranged for relative adjustment and locking of the plates.

2. A guard for planing knives operating through a table comprising a shaft mounted for rotative movement in the table remote from the knives, an arm extending from the shaft, a Weight connected to the arm to maintain rotative tension on the shaft, and

neesnoe a guard comprising a main plate having a hearing to engage the shaft, said bearing being formed with a slot to engage a pin carried by the shaft to fix the main plate on the shaft, a second plate superimposed on the main plate and mounted on the shaft for free rotative movement, the main plate remote from the shaft being formed with a series of apertures, and a pin carried by the second plate to engage in any one of the apertures in the main plate to adjust the plates with respect to each other.

In testimony whereof I affix my signature in presence of two witnesses.

DAVID CLARK XVEAVER. Witnesses:

R. H. RUTHERFORD, 'lnno. LENGELE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Eatents, Washington, 33. G.

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