D. l. FISHER.
APPLICATION FILED SEPT. I3. IaIa.
Patented Sept. 26,1916.
2 SHEETS-SHEET l.
Duncan Iza/Sher D. J. FISHER.
APPLICATION man sP.T..\3. 1913.
1 ,1 99,1 6.8. Pafented Sept. 26, 1916.
2 SHEETS-SHEET 2.
'DUNCAN J'. FISHER, OF KEYSTONE, -1VIONTANA.
'Specification of Letters Patent.
Patented Sept. 26, 1916.
Application filedSeptember 13, 1913. VSerial No. 789,627.
To'afZZ fwwma't may concern Be it known that I, DUNCANJ. FISHER, a citizen of the United States, Vresiding at Keystone, in the lcounty of Missoula and State Iof vMontana, have invented new anduse'ful Improvements in False Sets, ofwhich the following is alspecication.
This Ainvention Irelates to :an yimproved false set. Y
The object of the invention is to :provide a false set for use between ithe permanent setland the breast `in working drifts or itunnels, `wherein it is desired -to .prevent `'loose earth or rock orjgravel from falling in.
A further object `is .to provide a false set, which 1may be `substituted for -one of the broken permanent sets to hold "or Ysupport the top spiling or -lagging in 'place until a new :permanent set 'has ibeen ipositi'oned.
A further object is to providefa false set, which will not only support the breast but which .will also support Vthat portion ofthe top -and side spiling Lextending from ythe breast to the permanent fsets.
A still furtheriobject iis to provide a false set in which means are provided for :successively `building up or positioning the 'breast boards and supporting the saine while gthebore ofthe tunnel is being worked.
Still further objects and Inovel vfeatures ofconstruction will be 'more 'fully described in connection with'the accompanying drawings, and will be more particularly `pointed out in andbythe appended claim.
EIn 'the 4drawings:-1l3`i,f ure 1 illustratesone form 'of Ymy improved false set, show-v ing the `same interposed between a perma- -nent set and the breast of aidrifft or `tunnel which is being worked. Fig. '2 is a vperspective view of detached portions ofone of the false upright posts, showing Ethe parts' in approximate relative positions 4such as they would fassume when assembled. Fig. 3 is a view `in elevation of a breast rod 'with coacting portions therefor in sec'tion.
Like characters l of reference designate similar 'parts throughout the different iigures of the drawings.
For ypurposes of illustration, 1 haveshown my improved fa'lselset `positioned 'for working a ydrift or `tunnel and 'between 'the breast 1 `and the permanent set 'which flatter lmay Y comprise upright timbers@ and a horizontal top beam .3. VSide spi'ling-is lindicated at l and top spilling at "5, and Il have fshown enough of the same to illustrate how lthis 'spil'ing Ais prevented from falling inwardly ordownwardly at points between the Lpermarient set and the breast.
Referring more .particularly to the strucfture'constituting my invention, the `numeral :6 designates, generally, ftwo upright false set post structures, which `may be mounted orsupportedon jack boXes 7. The jack boxes 7 rest upon aV spacing plate 8 `which may be provided with one or more kribs 9 to hold the jack boXes against inward displacement and tomore rinly foundation the false posts 6.
10, which not only serves Vto support the Etop spiling 5, but which is also'constructed ito resist 4inward displacement of the upper ends or tops of 'the posts 6, as will 'hereinlafter more fully appear. posts 6 are :supported against movement rearwardly from the breast '1' by `strut rods andi-12 adapted to be interposed between lthe false set posts and the permanent set. The 'breast boards 13 are supported by the false set lposts 6 by a plurality of breast K holes 17. The opposite margin lof the `side 16 is provided withsupporting notches 19, the purpose of which will presently appear. The 'side -1'5 is provided with supporting i'notches 2O and also with supporting notches 21. yNear the opposite margin, said side is provided with holes The slabs or sides of each post are provided with a` base, which may bevinth'e form of a base `plate 23, and the side margins thereof are recessed in vdove tailed form, as indicated at 24E. rEhe lower vrends of the `slabs are'provided with dove ita1ils`25 land 26, shaped'to `it the dove "tailed lrecesses :24, 'thereby structurally uniting the side slabsl with lthe base plate against any "lateral movement outwardly of the former. The side slabs are shouldered at 27 and '28 for engagement with the ibase with respect thereto. 1 may connect the vside On the upper ends of the 'false posts 6, I dispose a cfalse sill -or beam The false set`l L of a jack screw, the enlarged turning hub of which is indicated at 31 and is provided -with openings to receive a jack rod or like implement, not shown. The lower end 32 j of the jack screw has threaded engagement 1n the upper wall of jack box 7, and it will be readily seen from the foregoing that the false set post 6 may be jacked up or down to the proper elevation.
The upper ends of the slabs 15 and 16 are connected by a cap 33, which is preferably of channel shape in cross section. The web 34 of the cap is mortised at 35 to receive tenons 36 and 37 formed on the slabs 15 and 16. The mortises 35 suitably shoulder the cap 33, so that at its end portions it rests upon the top edges of the slabs 15 and 16. The slabs may be united to the cap by screws 38.
Mid-braces 39, preferably in the plates, are provided with studs 40 adapted to tholes 41 and 42 in slabs 15 and 16. Key projections 43 are adapted to tit notches 44 and 45 so that the mid-braces will be structurally locked to the slabs 15 and 16 when the posts are assembled.
The channel caps form seats for the ends of a false set beam or sill 10, and the latter at one end is reduced to form an outwardly facing shoulder 46 for engagement with the web of the cap to resist inward movement of the post. rThe beam 10 is provided with a head 47 which is telescopically adjustable in the beamy 10, the head 47 having a reduced shank 48 slidably projecting into the beam 10. Set screws 49 are provided. to lock the extensible head so as to adapt the beam for tunnel work of di'erent widths. The head 47 is recessed so as to provide an outwardly spacing shoulder 50, adapted to engage the web of the cap and the outer portion of the head seats in the channel of the cap.
The manner in which the posts 6 are set up and braced will clearly illustrate how they are adapted to support the side spiling 4 against inward buckling while it will be clear that the top spiling is supported by the beam 10.
One of the breast rods is illustrated in detail in Fig. 3, and the same may consist of a shank or rod portion 51 having a ball 52 adapted to be socketed in a two-part base 53. The parts of the base may be held together in any desirable manner, and the base 53 is adapted to rest against the breast boards 13. The rod portionl may be provided with a hexagonal enlargement 54 and also with radial bores 55, whereby the rod may either be adjusted by a wrench or a turning bar. The opposite end of the rod 14 is threaded, as indicated at 56, for en form of `gagemen't with a redhead 57. The rod head may be in the form of a spindle having trunnion ends 58 adapted to seat in the notches and holes of the posts 6, in a manner which Y will now be described. It may be stated that the strut rods 11 and 12 are similar in construction to the breast rods 14, therefore a detailed description of Fig. 3 will suiiice.
I will now describe the manner in' which disposed against the uprights 2 of the per-` manent set, and the trunnions of the `heads are disposed in holes 22 and notches 19 of the post slabs.V The strut rods are then turned or jacked in their heads toimpart the desired supporting stress to the posts 6` .against movement toward the permanent set. As the tunnel is worked, one or more breastY boards 13 may be positioned inV place and held against the breast by the breast rods 14. The bases of the breast rods 14'engage the breast boards, and the heads of the breast rods have their trunnions journaledinthe notches 2O and holes 17 of the slabsj15 and 16, respectively. The breast rods will be jacked in their headsrto obtain the desired stress of engagement against the breast boards. After all of the breast boards 13 have been positioned in place, the breast planks 59 will be positioned, as shown. Plank rods 60, similar in all respectsto the strut and breast rods, but the heads of the plank rods, or rather the trunnions on oneside of the heads thereof, are journaled in holes 18, while their opposite trunnions are seated in notches 21. The disposition ofthe holes 18 with respect to the holes 17 provides for slightly canting the plank rods 60 with respect to the breast rods 14. After the breast planks are in place, it will be seen that the breast rods can be removed, as the plank rods will hold all of the breast boards in place. However, it will be necessary-to tighten up thesuccessively positioned breast boards, completely, before the breast planks can be located in position.v
Vhile I have herein shown and described f false set posts of sectionalskeleton forma tion, it will be understood that they may be made in one piece if the advantageous feature of adjustment by the jacks, together with other features, can be dispensed vwith and the posts made of diiferent sizes to accommodate different classes of'work.
The ease and facility with which this `false vided with trunnidgns adapted to be journaled in said uprights, the opposite ends of said strut rods having balls formed thereon, and
socket bases for the balled ends of said rods, substantially as described.
In testimony whereof I hereby aix my Y signature in the presence of two subscribing witnesses.
DUNCAN J. FISI-IER. Witnesses:
HAROLD SGANTMLBURY, EDNA BRoYLEs.
Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patenti,
. Washington, D. C.