US471797A - Zabby lassor - Google Patents

Description

v(No Model.)

Z. y LASSOR.

GHANNELING MAGHINB.

No. 471,797. Patented Mar. 29, 1892.

UNITED STATES PATENT OFFICE.

ZABBY LASSOR, OF STINESVILLE, INDIANA, ASSIGNOR OF TWO-THIRDS TO CHARLES C. DUNN AND FRANK MOORE, OF SAME PLACE. I

CHANNELING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 471,797, dated March 29, 1892.

Application nea Mara 2s, 1891.

To @ZZ whom it may concern:

Be it known that I, ZABBY LAssoE, a citizen of the United States, residing in Stinesville, county of Monroe, and State of Indiana, have invented certain new and useful Improvements in Stone Channeling Machines, of which the following is a specification.

This invention relates to improvements in stone-channelin g machines which travel back and forth over the stone to be channeled and produce the channel by theaction of cutters arranged and secured together in gangs; but my invention, however, is more especially directed to improvements in thel clamping devices for rigidly securing together the cutters of a gang. These gangs of cutters operate by gravity-that is to say, they are raised by power and dropped by gravity to strike successive blows, whereby the channel is formed, and are, therefore, necessarily quite long, very heavy, and require correspondingly ponderous clamping-plates for holding them together when in operation. The clampingplate must not only hold the cutters, but guide them in their descent, and to this end are vertically channeled to receive fixed guide-plates or trackways directing their movement, and, besides, must be so constructed as to provide for their connection with the devices for raising the cutter gangs in position to strike blows. As heretofore constructed, these clamps have been made in two parts, one part of which may be said to be the fixed jaw or main body of the clamp, and having cast therein the guidechannels and projecting therefrom a lug for connecting it with thelever or other device for elevating the cutters. The other part ofthe clamp constitutes the movable jaw thereof and is secured to the sliding but otherwise fixed jaw by bolts, which have usually been passed through the movable jaw and screwed into the fixed jaw, so as to firmly clamp the gangs of cutters lyingbetween these two jaws. In the practical opertion of these machines, notwithstanding the very strong and ponderous construction of these clamps, and owing to the sudden and violent jars they are subject to when the cutters are in operation, these bolts fre- Serial No. 386,788. (No model.)

qnently break, and more frequently both the fixed jaw and the movable jaw are fractured and broken at their corners, where they are the weakest, because, as will be understood, the bolts must be at a point on either side of the cutters and on a line passing through the channeled portion of the fixed clamping- Jaw.

The object of my invention is to provide an improved clamp which shall be simple, durable, and effective, and in which the parts are so constructed and arranged as to be capable of being readily and. conveniently put together or taken apart for repairs or renewal; and my invention consists in certain features of novelty in the construction, arrangement, and combination of parts hereinafter described with reference to the accompanying drawings, and more particularly pointed out in the claims.

In the said drawings, Figure 1 illustrates a perspective view of so'much of a stone-channeling machine as embodies my invention; Fig. 2, an inner face view of the base or back plate of the fixed but sliding jaw of my clalnp Fig. 3, a transverse section on the line 3 3 of Fig. 1, with the actuating-lever shown in full lines; Fig. 4, a similar but enlarged detail view of the clamp with the cutters removed, and more particularly illustrating the bolts and position thereof for locking the movable jaw of the clamp to the fixed jaw for clamping the gang of cutters; Fig. 5, a front eleva- `tion of the fixed but slidingjaw of the clamp,

more particularly illustrating the arrangeverse section on the line 6 6 of Fig. 3.

Similar letters and numerals of reference indicate the same parts in the several figures of the drawings.

A indicates a gang of cutters of the usual form and clamped together toward their upper ends by an ordinary clamp B, and bearing at these ends on the usual and ordinary face-plate C of the machines in which said cutters are designed to be employed. Upon their rear sides and toward their lower ends these cutters bear and slide upon afixed bedplate D, rearward of which is a revolving cam E, the purpose of scribed.

The bed plate D is bolted in the usual manner to the frame of the machine and projects outwardly beyond and downwardly to within a short distance ofthe rails F, as shown, for the purposes of illustrating the rela tive position of the bed-plate andl the cutters thereof, it being understood that the track upon which the machine moves is a temporary track, and is usually so constructed as to be bodily laterally movable for the purpose of transferring the machine to outa. new channel, the track governing the direction as to the line of the channel. The bed-plate is provided with a slot, (see Fig. 3,) through which projects a clamp G, provided on each side with channels embracing the bed-plate, which thereby forms a trackway guiding the clamp G and in turn the cutters while in' operation, thecutters being elevatedl by means of arms e e, actuated by the cam E,and by reason of one'of said arms working in a rear- Wardly-projecting lug g of the clamp.v As heretofore constructed, these'clamps have consistedof but two parts or casingsw-namely, they movable or clamping jaw andthe slidingor' otherwise fixed jaw4the fixed jaw having which will presently be decast' therein a' channel embracing the' slotted' walls'of the bed-plate.

TheV result of castingv the fixed jaw in one piece,` as has already been intimated, results inthe total loss of that jaw should any part of it be broken', asv frequently happens, and as this breakage usually occurs through its iiange or lip embracing the outer side of the' bed-plate it is one purpose of my invention to so construct this iiXed'j aw that onlya portion of it is lost byy such breakage, and at the'same time to'have saidjaw as rigid and du'rable'a's thoughvcast in onepiece. To these en'd's the fixed jaw is cast or constructed in two pieces, which for the purposes of clearness will be described as the base-plate 3 and the faceplate 2; The base-plate 3 has integral therewith the lug g, before described, and formed in its face a dovetail groove. The face-plate has formed therewith a rib or tenon conforming to the groove' in the base=plate, said groove v and tenonl preferably tapering to ward one endl, `so that the two parts may be wedged tightly together, the face-plate hav ing at its rear side an offset and forming the bottom and frontwall of the groove or channel embracing the bed-plate D, the straight edge of the kbase-plate forming the other wall. To promote the locking of vthe base and face plates of this sliding but otherwise IiXed jaw of the clamp and to insure them against any possibility of moving upon each other after being united and in their operative position, a pin'- 4 vis projectedk through the base-'plate and the tongue or tenon of the face-plate; but any other form of key may answer the same purpose, although in any event it should be of such a character that while securely locking the two parts together it may be removed when for any reason it is desirable to separate them.

With the iiXed jaw ofthe clamp constructed inthe above-.described manner it will be seen lby an inspection of Fig. 3 that should the :face-plate become injured it may be removed from the base-plate by raising or lowering jthe clamp out of one end of the slot in the bed-plate, removing the pin 4, sliding the face-plate off of the base-plate, and as readily `and quickly substituting a new face-plate.

In order that the movable or grippingjaw of the clamp, whichis secured to the nXed jaw, may be readily removed when broken and in order that the-bolts usually employed for uniting the two jaws may also be readlly removed whenbroken and newonessubstituted, I employ-bolts 6, (see Fig. 4,) provided with screw-threads removed from their heads and next their opposite extremities orvpoints.

The face-plate of the clamp is'provided with countersinks at the inner-'face of itsiiangeV or lip,through which the bolts' pass, andV thence throughperforationsin the movable jaw, nuts 7, working on projecting'endsof these bolts, serving to tighten the' movable jaw onV the gang of cuttersconned between thisjaw and the sliding jaw. By this construction andarrangement of the bolts it is obvious that when broken the head end may be readily pushed or punched out of the sliding jaw, and ,that as they do not screw into the movable jaw the other ends may be as readily removed. The head end of the broken bolt may be dropped or readily pushed out'of the. baseplate of the xed jaw and the projecting or nut end of said bolt be readily grasped and .unscrewed from the sliding jaw, if screwed therein, though in practice there are preferably no screw-threads in the sliding jaw, and, as a result, this end of the bolt may likewise be dropped or easily pulled out of the sliding Y aw. J I-laving described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. In a stone-channeling machine, the combination, with the gangs of drills, of a clamp therefor, the sliding but' otherwise fixed jaw of which is composed of a face and back plate removably dovetailed together, and' an actuating-arm connected with the back plate, substantially as described. n g

2. In a stone-channeling machine, th'e'combination, with the gangs 'of drills, of aclamp therefor having a ii'xed jaw composed of two parts removably dovetailed toge'theigand a pin projecting through and locking said twoparts against a longitudinal movement along their dovetailed connection, substantially as de-h scribed. j

3. In a stone-channeling machine, the com'- bnation, With the gangs of cutters and a slot;

IOO

'red bed-plate, of the face-plate 2, having a fits, and a, removable jaw Secured to said facedovetaii tenen and being provided at both plantev for clamping the cutters Johereto, suhends of its rear side with offsets, the hasestantially as set forth. plate 3, overlapping said offsets, so as to form 5 therewith channels for the reception of the Witnesses:

edges of the bed-plate, and said base-plate l CHARLES C. DUNN, having al dovetail groove in which said tenon A FRANK MOORE.

ZABBY LAs'soR.

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