US2005100A

US2005100A - Tiltable table top

Info

Publication number: US2005100A
Authority: US
Inventors: William J Merrigan
Original assignee: HERBERTS MACHINERY Co Ltd
Current assignee: HERBERTS MACHINERY Co Ltd; HERBERTS MACHINERY COMPANY Ltd
Priority date: 1934-08-27
Filing date: 1934-08-27
Publication date: 1935-06-18
Anticipated expiration: 1952-06-18

Description

June 18, 1935. w. .1. MERRIGAN 2,005,100

TI LTABLE TABLE TOP Filed Aug. 2'7, 1954 2 Sheets-Sheet 1 [17 venfor WJ M err/jam June 18, $350 w. J. MERRIGAN TILTABLE TABLE To? Filed Aug. 27, 1954 2 sheets-sheet 2 AK T0 inventor I J Wdf Merr 'gqn b fl/zoma'ua Patented June 1 8, 1935 UNITED STATE PATENT OFFICE a 10"Claims; (01. 31 1-38) This invention relates primarily to tilting table top constructions such as those employed uponcircular saws and analogous machine's;-

,;An object of this inventioniis to provide .an

improved tilting table top construction, enabling the table-top to be easily and quickly adjusted into any tilted position and frictionallylocked or held in suchpositionr More specifically, an object of the invention is to provide an improved 1 trunnion construction f or, tiltably'. supporting :the table top wherein, on'the operation of asingle tightening lever, both. trunnions of the table top will'besubjected to radial pressure forcing them against their respective bearings to lock or frictionally hold the table top inadjusted position.

A further object of the invention is to provide a construction for tilta-bly and adjustably sup-= porting a tabletop on its support, which can be easily, quickly and cheaply; manufactured and assemble tion. VI A Another object of theinvention isto provide an; improved construction forcircular saws;

the like, which employ rotating shafts or,spin-i dles-on which the saw or equivalentcutting. means i's mounted, which isso designedas to enable the bearings therefor-to be easily-mounted on the base-of themachine I Another object of the invention is to provide atable-top over which there is ;an adjustable fence havinglaterally extending arms at its forward end which. bear upon and are tightened againstthe forward edge of the table, and to provide ears onthe ends of the f rWard edge of the tablev which effectively; widen the; table, enabling the fence. to be adjusted over the complete width of the table. 1;

With the foregoing and other objects in view which will bemadernanifest. in the following detailed description and specifically pointed out inthe' appended claims,. reference is had to the accompanyin drawings and illustrative embodi- I ment offthe invention, vwherein: I I 1 l isa view-inside elevation of a circular saw oi'iwhich the invention has been embodied.

' 2 is-a vievv'v in front elevation of the -same.

Fig. 3 is a view in rear elevation of the same.- I

' Fig. 4 is a longitudinal verticalcentralsection through the circular saw. u I II 5 is a sectional vi 'w taken substantially upon the line 55 upon Fig.4., 1 I I ,Fig 6 isa vertical'section taken substantially upon the line66 upon Fig. 4.-

I Referring to the accompanying" drawings wherein similar reference characters designate d and which will be of durable construe,

" a table top H, which is mounted for tilting adjustment. On the underside of the table top H there are trunnions l2 and 13 which may be cast 5 integral with the table. topjas shown, or se'parately attached thereto." 1 These trunnionspresent semi-circular peripheries which rest on bearingsgenerally designated as M and I5, respectively, formed at the ends of "base I0. In'accordance with conventional practice, the bearings for the trunnions have their center portion relievedas indicated at It. The outer sides of the trunnionsar'e recessed as indicated at l! and I8 and present semi-circular beveled 1 surfaces "I 9 and 20.- O'nefiend of the base I!) is-provided with a sta-' tionaryclamping lug or bracket 2 l'which extend'sinwardly 'soxas toflb'e engage'able by the beveled surface [9. .At, the opposite end of the base l0 astud or bolt 22 extendsout of thebase on which is mounted a movable lug or clamp 23. 'This movable lug or clamp-carries a base 24 disposed betweenztwo vertical ribs 25 on the base so as to hold the movable lug or clamping member against rotation on stud or bolt 22. Movable lug 23 is engageable with the beveled surface 20 on trunnion l3. 7 The. outer surface of lug "23 is cammed'as indicated'atZB and is engageable by a' camrned surface 26 on lever 21 which is mounted for rotation on the outer end of bolt 22; Wherethe invention is' used on a circular saw, or the" like, the slot 28 formed in the table top is arranged in alignment with the centers of the trunnions Il and IS. TO permit adjustment,- lever 21 is rotated so as to loosen lug 23 and the. table top bodily tilted, the trunnions sliding on their respective bearings; When it isin 'adjus'ted position it may be frictionally held or locked in such position by reversely rotatinglever '21 which forces lug 23 toward its trunnion l8. This causes a slight shift in a longitudinal direction 'of the tabletop and its trunnions, forcing trunnion 11 against lug 2| and by the engagement with the beveled surface 19, trunnion-ill will be pressed in a radial direction down against bearing I4. At the same time, the tightening of lug 23 against beveled surface 20 imposes a radial pressure on trunnion l8 down against its bearing Hi;- In this Way, movement of the single lever '21 at the front of the machinecauses both trunnions to be forced againsttheir respective bearings and, the table. ,01 to beheld in adjusted position.

Screw 29 which is shown as adjustably mount,- ed on anear3ll atthetop of the base provides astop engageable by the underside of the table 55.

, edge beyond the sides of the table top. Pref-- top limiting its tilting movement in one direction to horizontal. The circular saw indicated at 3| is mounted on a transversely extending spindle 32 which is rotatable in a bearing 33. To

facilitate manufacture, assembly and the instalits bolts 36 may be merely dropped in the notches.

34 and 35 and on tightening the bolts 36, the

bearing and shaft or spindle 32 will be. mounted in place. The pulley by which the spindle is driven is indicated at 31.

Other constructions illustrated on the present saw consist of an arm 38 mounted on the base which extends up over thetabletop. Pivotedthereto there is a link 39 to which is pi voted a saw guard 40. Groove 4| which is formed in the table' top surfacereceives slidably 'a mitre cage 42. A fence43 is;provided at its'forward' end with laterally extending arms 44. A rod 45 extends'through the fence and has a downwardly bent rear end '46 engageable with the back edge of the table top. This rod has a thumb nut threaded thereon, which,.on being tightened, will .crowd the fence rearwardly and force arms 44 intoengagement with the forward edge of the table top, thus positioning the body of the fence43 parallel. to the :circular saw 3|.

At the forward corners of the table top there arelaterally extending ears 48 which project laterally beyond the sides of the table top and form extensions or continuations of the forward erably, the top surfaces of these ears aredisposed below the working. surface .of the table top so as to avoid machining them.

{The presence of these' ears enables the body of the fence to be moved to. the extreme side edges of .the table top, .thus enabling the use of. the entire table top surface and the catching of material a distance from the saw equal tothe distance between the saw and the extreme edge of. the tabletop.

From the above described constructions it will be appreciated that ,a novel,usimple and advantageous mounting is provided for tiltable table tops enabling the table top to be easily andquickly adjusted into any tilted position and thereafter-firmiyheld in. such position by imposing a greater pressure on the trunnions against their respective bearings. This radial pressure is imposed on both trunnions by the operation of a single tighteninglever at the front of the machine. Various changes may be made in the details of construction without departing from the spirit or scope of the invention as deflnedby the appended claims. 1

I claim:

1. A tilting table top construction comprising, a

support, a table top movable for inclination thereon, substantially semi-circular trunnions carried by the table top, bearings for the trunnions on the support, said trunnions presenting beveled surfaces on their sides, stationary-means on the support engageable with the beveled surface on one trunnion, and movable means engageable with the beveled surface on the other trunnion for'tightening the table top and trunnions toward the stationary means and thus causing the trunnions to be tightened against their bearings to hold the table top in adjusted position.

2. A tilting table top construction comprising,

. table top,

a support, a table top movablefor' inclination thereon, substantially semi-circular trunnions carried by the table top, bearings for the trunnions on the support, said trunnions presenting beveled surfaces on their outer sides, a stationary lug onthe support engageable with the beveled surface on one trunnion, and a movable lug onthe support engageable with the beveled surface on the other trunnion, and'means for tightening the movable lug toward its trunnion and .the stationary lug so as to tighten the trunnions against their bearings. I

3. Atilting table top construction comprising a support, a. table top movable for inclination thereon, arcuate trunnions rigidly carried by the table top, bearings for the trunnions on the support, stationary ineans adjacent one bearing engageable by the side of its trunnion, and movable means adjacent the other bearing engageable with the side of its trunnion to bodily shift the tabletop and trunnionsto cause the stationary'means to be engagedand the table top to be" held in adjusted position.

4. A tilting table top constructioncomprising a support, a'table top movable for inclination thereon, arcuate trunnions rigidly carried bythe table top, bearings for the trunnions 'on the support, stationary means adjacent one bearing en'- gageable by the side of its trunnion, and movable means adjacent the other bearing engageable with the opposite side of its trunnion to bodily shift the table top and; trunnions to cause the stationary means tobe engaged and the table top to be held in adjusted position.

5. A tilting table-top construction comprising a support, a table top movable for inclination thereon, arcuate trunnions'rigidly carried by the table top, bearings forthe trunnions on thesupport, there being a beveled" surface on the side" of at least one trunnion, stationarymeans adja? cent one bearing engageable by the beveled surface, movable meansadjacent the other bearing engageable with its trunnion to bodily shift'the table top and trunnionsto' cause the stationary means to be engaged and the table top to be held' in adjusted position.

- 6. Atilting table top construction comprising a support, a table top movable for inclination thereon, arcuate trunnions rigidly carried by the table top; bearings for the trunnions on the support, there'being a beveled surface on the side of at least one trunnion, stationary means adjacent one bearing engageable by the, beveled' 'surface, movable means adjacent the other bearing engageable with the opposite 'side of itstrunnion to "bodily shift the table top and trunnions to cause the stationary meansto be engaged and the table top to be held in adjusted position.

7. A tilting table top construction comprising a support, a table top movablefor inclination,

thereon, arcuate trunnions rigidly carried by", the bearings for the trunnions on the sup? port there being a beveled surface onJth'e side of atleast one trunnion, stationary means adjacent one bearing engageable by the *side of. its trunnion, movable means adjacent the other bearing engageable with thebeveled surface, and means for tightening the movable means tobodily shift. the table top and-trunnions to causethe stationary means 'to be engaged and. the table top to be held in adjusted position.

8. A tilting table top construction comprising a support, a table top movable forinclination thereon,,arcuate trunnions rigidly carried by the table top, bearings for the trunnions on the sup port, there being a beveled surface on the side of at least one trunnion, stationary means adjacent one bearing engageable by the side of its trunnion, movable means adjacent the other bearing engageable with the beveled surface on the opposite side of the trunnion, and means for tightening the movable means to bodily shift the table top and trunnions to cause the stationary means to be engaged and the table top to be held in adjusted position.

9. A tilting table top construction comprising a support, a table top movable for inclination thereon, arcuate trunnions rigidly carried by the table top, bearings for the trunnions on the support, there being a beveled surface on the sides of the trunnions, stationary means adjacent one bearing engageable with the beveled surface of its trunnion, movable means adjacent the other bearing engageable with the beveled surface on the opposite side of its trunnion, said movable means being operable to bodily shift the table top and trunnions to cause the stationary means to be engaged and the table top to be held in adjusted position.

10. A tilting table top construction comprising a support, a table top movable for inclination thereon, arcuate trunnions rigidly carried by the table top, bearings for the trunnions on the support, therebeing a beveled surface on the sides of the trunnions, stationary means adjacent one bearing engageable with the beveled surface of its trunnion, movable means adjacent the other bearing engageable with the beveled surface on the opposite side of its trunnion, said movable means being operable to bodily shift the table top and trunnions to cause the stationary means to be engaged and the table top to be held in adjusted position, the beveled surface being so arranged that when the stationary means is engaged and the movable means is caused to engage its beveled surface the trunnions will be tightened thereby against their respective bearings.

WILLIAM J. NIERRIGAN.