US2077405A

US2077405A - Sanding block

Info

Publication number: US2077405A
Application number: US67724A
Authority: US
Inventors: Enge Conrad Christian
Original assignee: Individual
Current assignee: Individual
Priority date: 1936-03-07
Filing date: 1936-03-07
Publication date: 1937-04-20
Anticipated expiration: 1954-04-20

Description

April 20, 1937. Q Q ENGE 2,077,405

SANDING BLOCK Filed March 7, 1936 2.9 26 27 31 Cz'a'amei'mvamon @Y my 2m ATTORNEY Patented Apr. 20, 1937 UNITED STATES PATENT OFFICE Application March 7, 1936, Serial No. 67,724

Claims.

'I'he invention relates to a sand paper holder and more particularly to a sanding or polishing n carries a resilient covering piece so that when` sand paper or emery cloth is attached to the block a smoother nish to a piece of work is assured and also eliminates premature wear of the emery cloth or sand paper.

2o A further object of the invention is the provision of a block of this character, which is simple in construction, thoroughly reliable and elective in its purpose, strong, durable and inexpensive to manufacture.

With these and other objects in view, the invention consists in the features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawing, which discloses the preferred embodiment of the invention and pointed out in the claims hereunto appended.

In the accompanying drawing:

Figure 1 is a top plan view of a block constructed in accordance with the invention and partly in section. y

Figure 2 is an end elevation thereof.

Figure 3 is a longitudinal sectional view ltaken on the line 3-3 of Figure l looking in the direction of the arrows.

Figure 4 is a sectional view on the line 4-4 of Figure l looking in the direction of the arrows.

Figure 5 is a perspective view of one of the gripping balls employed with the block.

Figure 6 is a view similar to Figure 1 showing 15 a modified form.

Figure '7 is a sectional view on the line 'I-l of Figure 6 looking in the direction of the arrows.

Figure 8 is a fragmentary horizontal detailed sectional view taken approximately on the line I-- of Figure 9.

Figure 9 is a sectional view on the line 9--9 of Figure 8.

Similar reference characters indicate corresponding parts throughout the several views in the drawinz.

Referring to the drawing in detail. particularly Figures 1 to 5 inclusive, A designates generally a block preferably made from-wood having a sunken area in its top to provide upwardly divergent ledges III while about the bottom working face and opposite longer sides of the block A is trained a resilient piece II, its side edges being carried on to the ledges l0 and made secure thereto by metal retaining strips I2, these being secured in place by fasteners I3. 10

Located in the sunken top of the block A is a plate I4 of metal, the same being of the required width and length and is made secure or xed by fasteners I5 which are driven into the block A through the top thereof. Riveted to this plate 15 are latching cams i6, these being adapted to swing on the rivets I1 which function as pivots therefor for biting engagement with a pair of clamping hails IB swingingly supported upon pivots I9 carried in downturned ends 20 of the plate 20 I4 and accommodated within insets 2l provided in opposite ends of said block A. These ballsV I8 are adapted to be swung to a gripping position to engage with overlapping edges 22 with relation to the strips I2 of a piece of sand paper 23 which 25 is adapted to be wrapped about the block A and overlie the resilient piece II which constitutes a backing for said piece of sand paper 23.

The latching cams I6 are formed with nger engaging extensions 24 so that they can be read- 30 ily manually manipulated for shifting the same into latching or unlatching position. These latching cams have serrated edges 25 so as to assure a positive and firm grip upon the hails i8 to avoid slipping of these latching cams when 35 thrown into latching position to hold the balls in clamping engagement with the overlapping edges 22 of said piece of sand paper 23.

The sand paper 23 when wrapped about the block A will be backed by the resilient piece Il 40 for the cushioning of such sand paper 23 in the use of the block for sanding purposes.

In Figures 7, 8 and 9 of the drawing there is shown a slight modification wherein the latching cams 26 are formed with externally ratchet faced 45 hubs 21, these being journaled on pivot bolts 28 mounted in a housing 29 beneath the plate 30 which is similar to the plate I4 and within this housing 29 is a ratchet spring 3| the same being adapted to play against the ratchet faced hubs 50 21 of the cams 26 so that ratchet action is had when these cams 26 are moved into latching or unlatching positions, the ratchet action being effective in throwing the cams 26 in either direction. 55

It is preferable to have the balls I8 provided with a central nib 32 for biting engagement with the serrated edges 25 of such cams I6.

It is, of course, understood that in lieu of the sanding paper 23 other abrasive material may be used, as for example, emery cloth serviceable for polishing purposes.

While it has been stated that preferably the block A is made from wood the same may be made from metal, such as aluminum, if found desirable.

What is claimed is:

l. As an article of manufacture a block having a sunken top providing angled ledges opposite r each other at the sunken top, a pair of latching cams swingingly supported in the sunken top, and clamping bails swingingly carried by the block and movable between the cams and said ledges for the clamping of abrasive material when wrapped about the block.

2. As an article of manufacture a block having a sunken top providing angled ledges opposite each other at the sunken top, a pair of latching cams swingingly supported in the sunken top. clamping balls swingingly carried by the block and movable between the cams and said ledges for the clamping of abrasive material when wrapped about the block fixed thereon, and a resilient backing on the block for said abrasive material.

3. As an article of manufacture a block having a sunken top providing angled ledges opposite each other at the sunken top, a pair of latching cams swingingly supported in the sunken top, clamping balls swingingly carried by the block and movable between the cams and said ledges for the clamping of abrasive material when wrapped about the block xed thereon, a resilient backing on the block for said abrasive material, and ratchet means coacting with said cams.

4. As an article of manufacture a block having a sunken top providing angled ledges opposite each other at the sunken top. a pair of latching cams swingingly supported in the sunken top, clamping bails swingingly carried by the block and movable between the cams and said ledges for the clamping of abrasive material when wrapped about the block fixed thereon, a resilient backing on the block for said abrasive material. ratchet means coacting with said cams. and serrations formed at the working edges of said cams.

5. As an article of manufacture a block having a sunken top providing angled ledges opposite each other at the sunken top, a pair of latching cams swingingly supported in the sunken top. clamping balls swingingly carried by the block and movable between the cams and said ledges for the clamping of abrasive material when wrapped about the block xed thereon, a resilient backing on the block for said abrasive material, ratchet means coacting with said cams, serrations formed at the working edges of said cams. and spurs on the bails cooperating with said ser` rations.

CONRAD CHRISTIAN ENGE.