US1828576A - Troweling machine - Google Patents

Description

Oct. 20, 1931. T N 1,828,576

TROWELI NG MACHINE Filed May 20, 1929 2 Sheets-Sheet 1 Z i J WHHESSES v 'I'homas I QlCLtL n- ATTOR NEYS T. PALA TINI 1,828,576

Oct. 20, 1931.

TROWELING MACHINE v 2 Sheets-Sheet 2 Filed May 20, 1929 INVENTOR Thomas Palalii/rw ATTORN EYS Patented Oct. 20, 1931 y Application filed may 20,

v e 'a troweling machine wherein a plurality of power driven trowels are provided and means" associated therewith for supporting the trowels so that ftheyfwillfunction in a horizontal; or vertical position so as to trowel pavements, walls, ceilings or the like.

A- further. object of the invention, more specifically, is to provide a troweling machine especially adapted for troweling pavements, the arrangement being such that a power ele ment is carried by a framework and an auxiliary frame is associated therewith carrying the trowels with means for raising or lowering the trowels so that they may be adjusted and also so that they may be moved from place to place Without contact with the supporting surface.

In the accompanying drawings,

Figure 1 is a top plan View of a troweling machine disclosing an embodilnent of the invention, the same beingshown in position for use;

Figure 2 is an end view of the structure shown in Figure 1;

Figure 3 is a front view of the machine shown in Figure 1;

Figure 4 is a fragmentary sectional View through one of the troweling machines and associated parts;

Referring to the accompanying drawings by numerals, 1 indicates a batch or section of concrete pavement which has been laid, and which is to be smoothed by hand trowels or some other means.

In the present instance a troweling machine has been positioned over the batch 1, as shown in Fig. 1, and this machine is adapted to move longitudinally over batch 1 and to trowe1 the same as it travels thereover. The device may be moved over batch 1 once or a number of times, as the occasion demands. In order that the troweling machine embodied in the invention shall function propf 'raownmne MACHINE v 1529. Serial noqsessas. I erly the side boards 2 and 3 used as moulds for the'cement batch 1 also act as tracks for the various trolley wheels 4 and 51 These wheels are carried by axles 6 and 7wl1ich e'xtend through suitable bearings carried on the under surface of the main frame- 8. On top of themain frame 8 is positioned an aux-- iliary frame 9 which is adapted to be moved upwardly and downwardly for dififerent purposes. The main frame 8 may be metal, wood or other material'and acts as a truck forgcarrying the auxiliary frame 9 and as]- sociated parts. Also mounted'on the' main frame isa platform 10 carrying the prime mover llgsaid prime mover being shown as an electric motor, although some other form of primemover may be used. The armature of motor 11, is connected throughsuitable F 'rnoivms PAL TI I; or Barman, NEW JERSEY:

gears 12 to the shaft 13 and also'tothe shaft 14. Shaft 13 'carries'a pulley 15, andshaft 14L carries a pulley 16. A belt 17 passesoveif pulley I16 and also the pulley 18 which is rigidly secured to shaft 7, whereby this shaft is rotated whenever motor 11 is'functioning. This causesa rotation of the traction wheels 5, whereby the entire machine is propelled along over the tracks 2 and 3. The rotation of the wheels 5 is slow compared with the various troweling disks 19, 20,21, 22'and 23. The pulley 15 accommodates a belt'24' which passes over pulley 25, said pulley 25 being a double pulley, so that belt 26 may pass there over and over the double pulley 27, and a belt 28 passesover double pulley 27 and overv dou-;

ble pulley 29. A cross belt also passes over pulleys-29 and over the double pulley 31. A belt 32 passes over thedouble pulley 31'and over pulley 33. Pulley 25 is rigidly secured to shaft 34, While pulley 27.is rigidly secured to shaft 35, whereby powerfrom pull'ey 25 will be transmitted to pulley 27 and thence through the belt 28 to pulley 29 which is rigidly secured to shaft Power is transmitted'from pulley 29 through the cross belt 30, to pulley 31 which is'rigidly secured to shaft 37. Belt 32 transmits power from pulley 31 to pulley 33, which latter pulley is rigidly secured to shaft 38; By reason of the construction just described the various shafts carrying the various troweling :disks are driven through power derived from the motor 11. Each of these disks is supported by a thimble 39 (Fig. 4), which thimble is connected in any suitable way to one of the transverse bars 40 of the auxiliary frame 9. Each of the trowels is formed with a flat bottom surface 41, as shown in Fig. 4;, and this surface merges into an inclined peripheral flange 42. As indicated by the arrows in Fig. 1, the trowels 19, 20 and 21 operate in the same direction, while the remaining two trowels operate in a reverse direction. The constant rotation of these trowels will produce the desired troweling effect on the concrete batch 1 and as these trowels may be operated at a comparatively high speed the machine may be moved rather rapidly over batch 1 and yet produce a good troweling action. It is known that heretofore in most instances hand trowels were moved back and forth over a batch of concrete, as for instance, a concrete sidewalk. This was to smooth the surface and to make a closer texture adjacent the surface. At each corner of the auxiliary frame is a screw 43 which has an abutment or shoulder 14 and a reduced guiding extension 45. By rotating these screws in the desired direction the auxiliary frame 9 may be raised or lowered slightly so that the troweling disks will operate at the desired level. Where the machinehas been moved over a batch of pavement in order to trowel the same and it is thought necessary to subject the batch to a second troweling operation the auxiliary frame 9 is raised bodily upwardly so that the troweling disks will be operated an appreciable distance above the concrete batch. The machine. is then pushed manually back to its starting point or the prime mover is reversed and the ma chine propelled back to its starting point. After having reached the starting point the auxiliary frame 9 and associated parts are lowered and a second troweling operation is performed. In order to provide a quick raising and lowering of the frame 9, shafts 46 and47 are mounted on the respectiy e frames illustrated particularly in Figs. 1 and'2, and similar shafts 48 and 49 are mounted at the opposite sides of the respective frames. Shafts 46 and 47 are'connected together by suitable toggles 50 at each'end, and similartoggles 51 connect shafts 48 and 49 at each end. Links 52 and 53, as shown in Fig. 1, connect certain toggles so that when the hand lever 54; is moved for shifting one of the toggles 50 motion will be transmitted to allthe other toggles and connected parts, whereby the frame 9 will be raised or lowered according to the direction of movement of lever 54. This raising and lowering of the frame is onlyslight, asfor instance, an inch or possibly two inches, and the belts 17 and 24 will permit this movement without becoming dislocated."

What I claim is 1. In a troweling machine, a plurality of troweling disks, means for rotating said disks and a pair of frames for supporting and moving the disks during their operation, one of said frames being provided with traction wheels and the other frame being provided with threaded members for varying the distance between the respective frames, and means coacting with both frames for quickly elevating one frame and all of said disks, whereby the machine may be moved from one place to another without the disks contacting with the ground. p 2. In a troweling machine of the character described, a plurality of troweling members, and means for supporting and driving said troweling members,.said supporting means including a rectangular frame provided with traction wheels, an auxiliary frame mounted on the first-mentioned frame,'anda screw at each corner of the auxiliary frame, each of said screws being provided with a shoulder and a depending restricted extension loosely fitting into the first-mentioned frame, whereby .when said screws are moved the frames are adjusted in relation to each other for varying'the contact of said troweling members.

THOMAS PALATINI.

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