Tiltable table top

June 18, 1935.

W. J. MERRIGAN

TILTABLE TABLE TOP

Filed Aug. 27, 1934

2,005,100

Sheets-Sheet 1

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June 18, 1935« w. j. merrigan 2,005,100

TILTABLE TABLE TOP

Filed Aug. 27, 1934 2 Sheets-Sheet 2

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/Forneys.

Patented June 18, 1935

2,005,100

UNITED STATES PATENT OFFICE

2,005,100

TILTABLE TABLE TOP

William J. Morrigan, Los Angeles, Calif., assignor to Herberts Machinery Company, Ltd., Los Angeles, Calif., a corporation of California

Application August 27, 1934, Serial No. 741,641

Claims. J

This invention, relates primarily to tilting table top constructions such as those employed upon circular saws and analogous machines.

An object of this invention is to provide an S- improved tilting table top construction, enabling the table top to be easily and quickly adjusted into any tilted position and fnationally locked or held in such position. More specifically, an object of the invention is to provide an improved 10 trunnion construction for tiltably supporting the table top wherein, on the operation of a single tightening lever, both trunnions of the table top will be subjected to radial pressure forcing them against their respective bearings to lock or fric]₅ tionally hold the table top in adjusted position.

A further object of the invention is to provide a construction for tiltably and adjustably supporting a table top on its support, which can be easily, quickly and cheaply manufactured and 20 assembled and which will be of durable construction. - , ·' - -..-Another object of the invention is to provide an improved construction for, circular saws, and the like, which employ rotating shafts or spin25; dies on which the saw or equivalent cutting means is mounted, which is so designed as to enable the bearings therefor to be easily mounted on the base of the machine»

Another object of the invention is to provide 30 a table top over which there is an adjustable fence having laterally extending arms at its forward end which bear upon and are tightened against the forward edge of the table, and to provide ears on .the ends of the forward edge of the 35 table which effectively; widen the.table,- enabling the fence to be adjusted over the complete width of the table. ..With the foregoing and other objects in view which will be made manifest; in the following 40 detailed description and specifically pointed out in the appended claims, reference is had to the accompanying drawings and illustrative embodiment of the invention, wherein:

Fig. 1 is a view in side elevation of a circular 45 saw on which the invention has been embodied.

Fig. 2 is a view in front elevation of the same. Fig, 3 is a view in rear elevation of the same.

Fig. 4 is a longitudinal vertical central section through the circular saw. , ,

Fig. 5 is a sectional view taken substantially upon the line 5—5 upon Fig. 4..

Fig. 6 is a vertical section taken substantially upon the line 6—6 upon Fig. 4.

Referring to the accompanying drawings 55 wherein similar reference characters designate

Cl. 311—38) similar parts throughout, the circular saw illustrated has a base 10 constituting the support for a table top 11, which is mounted for tilting adjustment. On the under side of the table top it there are trunnions 12 and 13 which may be cast 5 integral with the table top as shown, or separately attached thereto. These trunnions present semi-circular peripheries which rest on bearings generally designated as 14 and 15, respectively, formed at the ends of base 10. In accordance 10 with conventional practice, the bearings for the trunnions have their center portion relieved as indicated at 16. The outer sides of the trunnions are recessed as indicated at 17 and 18 and present semi-circular beveled surfaces 19 and 20. 15 One end of the base 10 is provided with a stationary clamping lug or bracket 21 which extends inwardly so as to .be engageable by the beveled surface 19. At the opposite end of the base 10 a stud of bolt 22 extends out of the base On v/hich 20 is mounted a movable lug or clamp 23. This movable lug of clamp carries a base 24 disposed between two 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 25 23 is engageable with the beveled surface 20 on trunnion 13. The outer surface of lug 23 is cammed as indicated at 26 and is engageable by a cammed surface 26' on lever 27 which is mounted for rotation on the outer end of bolt 22. 30

Where the 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 17 and 18. TO permit adjustment, lever 27 is rotated so as to loosen lug 23 and the 35 table top bodily tilted, the trunnions sliding on their respective bearings. When it is in adjusted position it may be frictionally held or locked in such position by reversely rotating lever 27 which forces lug 23 toward its trunnion 18. This causes 40 a slight shift in a longitudinal direction of the table top and its trunnions, forcing trunnion 17 against lug 21 arid by the engagement with the beveled surface 19, trunnion Ί 7 will be pressed in a radial direction down against bearing 14. 45 At the same time, the tightening of lug 23 against beveled surface 20 imposes a radial pressure on trunnion 18 down against its bearing 15. In this way, movement of the single lever 27 at the front of the machine; causes both trunnions to 50 be forced against their respective bearings and the table top to be held in adjusted position.

Screw 29 which is shown as adjustably mounted on an ear 30 at the top of the base provides a stop engageable by the under side of the table 55

2,008,100 top limiting its tilting movement in one direction to horizontal. The circular saw indicated at 31 is mounted on a transversely extending spindle 32 which is rotatable in a bearing 33. To 5 facilitate manufacture, assembly and the installation of this spindle on base 10, one side of the base is notched as indicated at 34 to receive a part of the bearing and adj acent this large notch there are bolt receiving notches 35 which 10 are open at their upper ends. The bearing with its 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 15 driven is indicated at 37.

Other constructions illustrated on the present saw consist of an arm 38 mounted on the base which extends up over the table top. Pivoted thereto there is a link 39 to which is pivoted a 20 saw guard 40. Groove 41 which is formed in the table top surface receives slidably a mitre cage 42. A fence 43 is provided at its forward end with laterally extending arms 44. A rod 45 extends through the fence and has a downwardly 25 bent rear end 46 engageable with the back edge of the table top. This rod has a thumb nut 47 threaded thereon, which, on being tightened, will crowd the fence rearwardly and force arms 44 into engagement with the forward edge of 30 the table top, thus positioning the body of the fence 43 parallel to the circular saw 31.

At the forward comers of the table top there are laterally extending ears 48 which project laterally beyond the sides of the table top and 35 form extensions or continuations of the forward edge beyond the sides of the table top. Preferably, the top surfaces of these ears are disposed 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 to 45 the distance between the saw and the extreme edge of the table top.

From the above described constructions it will be appreciated that a novel, simple and advantageous mounting is provided for tiltable table 50 tops enabling the table top to be easily and quickly adjusted into any tilted position and thereafter firmly held in such position by imposing a greater pressure on the trunnions against their respective bearings. This radial pressure is im55 posed on both trunnions by the operation of a single tightening lever 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 defined by the appended 60 claims.