US236326A - Charles p - Google Patents

Description

(Model.)

C. P. GROUT.

- Dental Enggilfle.v No. 236,326. v vPatented* Jan. 4,1881.

Unirse STATES PATENT Oria-CE..

CHARLES P. GROUT, OF NEV YORK, N. Y.

DENTAL ENGINE.

SPECIFICATION forming part of Letters Patent No. 236,326, dated January 4, 1881.

Application filed June 24, 1880. (Model.)

To all whom it may concern Beit known that I, CHARLES P. Gaoufr, of the city of New York, in the county and State ot' New York, have invented certain new and useful Improvements in that class of machines for transmitting motion commonly known as Dental Engines,77 of which the following is a specification.

One of my improvements consists in the combination, in a dental engine ormachine, for transmitting motion, of a base, a standard, a driving-Wheel supported in said standard, and a universal joint forming a connection between the said base and standard, and preferably, also, a clamping device for securing said standard in different positions.

Another of my improvements consists in the combination, in a dental engine, of a standard, a drivin g-wheel supported in said standard, and having a crank attached thereto, a treadle adapted to be adjusted around said standard at different angles thereto, and a rod forming a direct connection between said treadle and crank.

Another of my improvements consists in the combination, in a machine for transmitting motion, of a base comprising an arc-shaped treadle-support, a treadle tted upon said support, a driving-wheel and crank, and a rod forming a direct connection between the treadle and crank, the whole arranged so as to permit the horizontal adjustment ofthe treadle along said guide.

Three of my improvements relate to those machines in which the upper portion of the standard is hinged or pivoted relatively to the lower portion and a spring is employed for bringing the standard automatically back to a vertical position when desired.

One of such improvements consists in the combination, with such a standard, of a stationary clamping plate, a spring actuated plate or piece, and a clamping-screw carried by the standard, whereby facility is afforded for holding the upper part of the standard at an angle to the lower part thereof by friction, or by securely clamping it in position.

Another of such improvements consists in a novel means whereby the Lipper or hinged portion of the standard may be locked to or released from the spring which tends to bring it to a vertical position.

The third of such improvements consists in a novel means for adjusting the power of the above-mentioned spring.

Other improvements consist in the combination of two shafts, two hinged frames comprising bearings for said shafts, pulleys upon said shafts for the reception of a band, and guide-pulleys, over which said band is deiiected as the frames are turned relatively to each other to bring the shafts toward a position in line with each other; also, -in a novel arrangement and construction of hood attaohed to said frames for concealing the pulleys and band.

Other of my improvements consist in various combinations of parts and details of construction embodied in the upper part of the machine, wherebyr a greater range of adjustment is secured, and which are to be hereinafter fully described.

1n the accompanying drawings, Figure 1 represents a side view, partly in section, of a machine embodying my invention. Fig. 2 represents a side view thereof, at right angles to Fig. 1, and also partly in section. Fig. 3 represents a horizontal section through the standard ofthe machine, at about the center of the ,driving-wheel bearin g. Fi guet represents a detail view of the treadle, connecting-rod, and crank. Fig. 5 represents a detail view, hereinafter to be explained. Fig. 6 represents a side view of the two hinged frames, with a hood of modified form attached thereto 5 and Figs. 7 and 8 represent detail views, upon an enlarged scale, of a. modified arrangement of guide-pulley for use in connection with said frames.

Similar letters of reference designate corresponding parts in all the figures.

A designates the base of the machine, to which is secured the standard, consisting of a lower portion, B, and an upper portion, Bl.

O designates the driving oriiy wheel, mounted in bearings in the part B of the standard, and in the present example of my invention the shaft of said fly or driving wheel forms the and connecting them together.

pivot which supports the upper portion, B', l

of the standard, and upon which the latter may turn.

As clearly shown in Figs. l and 2, the standard is connected to the base by a universal or ball-and-socket joint, D, which may be tightened by a lever, a, so as to hold the standard at an angle relatively to the base. Though a ball-and-socket joint is preferable, a simple knncklejoint might be used.

To the shaft of the driving-wheel C is attached a crank, C', which is actuated by a treadle, C2, through a connecting-rod, C3. To adapt the treadle and rod for operating the crank when the standard is swung out of a vertical position, I attach the said connectingrod to the crank by a ball-aiid-socket-joint, b, and to the treadle by inserting said rod in a socket, c, attached to the treadle, wherein it may be secured by a set-screw, d. The connectingrod C3 is composed of two pieces connected by a piece, C4, which comprises two sockets for the reception of balls upon the ends of the pieces forming the connecting-rod The piece G4 is pivoted at e to the lower part of the standard, so as to serve as a radius-link.

In order to enable the operator to adjust the treadle into convenient position for use, I attach to the base A an arc-shaped treadle-support, A', upon which the treadle maybe shifted horizontally at dit'erent angles relatively to the standard, the connecting-rod C3 forming a direct connection between the crank and treadle in whatever position the latter may be adjusted to. In the present instance afoot or block,f, is arranged to slide upon said support, and the treadle is hinged to said block or foot.

E designates a spring employed to bring the upper portion, B', ofthe standard back to a vertical position after it has been deflected in either direction.

In order to hold the upper portion of the standard in any desired position, and prevent its return by the spring E, I employ a stationary arc-shaped or segmental plate, F, and provide the said portion B' of the standard with a clamping-screw, g, which may be turned to lock the upper portion, B', of the standard at any position relatively to the lower portion thereof.

In lieu of employing the screw g to clamp the portion B' ot' the standard at an angle to the lower portion, I may employ a plate or piece, g', adapted to be pressed against the clamping-plate F by the pressure of a spring, g2, and thus effect the same result by the friction of the piece g' against the claml'iing-plate F, as shown in Fig. 2.

In order to adjust the spring E to the exact tension required, I employ a sheath, E', adapted to be adjusted up and down upon said spring, and forming an auxiliary spring of much greater strength than the spring E. When the sheath or auxiliary spring is moved upward the power or tension of the spring is increased, but when moved downward the tension thereot'is diminished.

In some cases it may be desired to dispense with the spring-power for raising the upper part ot' the standard-as, for instance, when it is desired to use the machine for a long time with the part of the standard inclined, I coilnect the spring E to a socket or sleeve, G, tit ting upon the upper portion, B', of the standard and adapted to slide up and down thereon. Vhen it is desired to disconnect the spring, the said sleeve or socket is raised into the position shown in dotted outline ill Fig. 2.

Supported upon the upper end of the portion B' ot the standard is a frame, H, fitting upon the standard, and secured in place by a set-screw, h. The frame II comprises a socket, H', to the interior ot which a sleeve, t', is fitted, and is provided with a set-screw,j, for holding the sleeve in any position after it has been vertically adjusted.

I designates a frame or yoke comprising bearings for a cone-pulley, I', and having a shank or stem, k, fitting in the sleeve The. frame or yoke I is composed ot' two pieces adapted to swing independently oteach other upon the shaft of the cone-pulley I' as a pivot.

I2 designates guide-pulleys, supported upon a shank or stem, l, which tits the interior ot' the standard B', and is adapted to be secured in any vertical position bythe screw l1., which holds the frame H in place.

It is obvious that when it is desired to pass the band J over any particular step ot' the cone-pulley I the sleeve v must be raised or lowered in the socket Il', so as to bring the step of said pulley opposite the upper periphery ofthe guide-pulleys l2.

To the yoke or frame I is hinged a second yoke or frame, K, which furnishes a hearing for the shaft K', to which motion is imparted from a pulley, m, upon the shaft of the conepulley I', by a band, u, passing around guidepulleys n' and over a pulley, a2, upon the end of the shaft K'. This affords provision for turning the shaft K into a position inline with the cone-pulley I', or into a position parallel therewith, or at any angle between said two extreme positions. When the shaft K is turned up into line with the pulley I a greater length of band i1, is required than when it is turned down into a nearly-parallel position, and to prevent undue straining of the band the guide-pulleys it are supported upon studs projecting from the pin or pivot 0, (sec Fig. 2,) which hinges the i'ranie or yoke K to the frame or yoke I', the said studs heilig eccentric to the center ofthe pin o. lVhen so constructed the lower side ot' the periphery of the guide-pulleys a' is nearly coincident with the center of pin 0, and in turning the frame K over parallel with the frame I the belt or band n is not strained. This same result may be accomplished by mounting the pulleys n' 011 studs a3, separate from the hinge-pin o, as

IOO

IIO

vss

shown in Figs. 7 and 8, and in such case the studs n3 are arranged to slide in bearings n4, and springs a5 are employed to press them outward from the centers of the shaft K' and of the cone-pulley I' when the two are inline with.

each other. As the band n is drawn over the pulleys n by the swing of the frameA K, the pulleys n' are moved inward against the pressure ot' the springs a5, and the straining of the band obviated.

In order to partly support the shaft K' and connections, when turned outward to an approximately horizontal position, as shown in Fig. 1, I employ a spring, p, coiled around the pin o, uniting the frames I and K, as represented in Figs. l and 5.

L L' designate two frames like the frames I and K, hinged together in the same way. The fratne L is loosely fitted upon the shaft K', and the frame L' supports the shaft M, which is intended to carry a tool.

Motion is imparted from a pulley, q, on the shaft K' by a band, r, passing around guidepulleys s and over a pulley, t, upon the shaft M, the guide-pulleys being similar to the pullcys u', and supported in the same way. The shafts K' and M are free to turn in their bearings in the frames supporting them, and are furnished with collars u, for preventing their shifting lengthwise.

In order to prevent the hair or whiskers of an operator from catching in the belts or bands n and r, I employ guards or hoods O, attached to each of the frames I K L L', and serving to conceal the pulleys over which the bands'u and r pass, as clearly shown in Fig. 5.

In lieu of the form of hood shown in Figs. 1, 2, and 5, I may employ a hood composed of sections O', as shown in Fig. 6, the two end sections heilig permanently attached to the frames I and K, and the several sections being so constructed that they telescope one within another when the frames are swung together from the position shown in Fig. 6. The several sections may be connected at their lapping` edges by pins, and working in slots, so that the separation at the edges is prevented.

By my invention I provide a dental engine in which varied adjustments of the several parts are readily effected, and a very wide range of adjustment secured, which are the great aims in constructing such a machine.

Although my improvements are here shown as embodied in a dental engine, I do not intend to limit them to machines for dental use only; but they may be embodied in similar machines for other purposes.

I am aware that I am not the irst inventor of a dental engine comprising a tilting upright and means for securingitin a normallyinclined position, and I do not, therefore, claim this as my invention. y

What I claim as my invention, and desire to secure by Letters Patent, is-

l. The combination, in a dental engine, of

a base, a standard, a driving-wheel supported in said standard, and a universaljoint forming a connection between said base and standard to permit the tilting of the latter from a vertical position in any direction, substantially as specitied.

2. The combinatiomin a dental engine, ot a' base, a standard, a driving-wheel supported in said standard, a universal joint forming a connection between said base and standard to permit the tilting of the latter from a vertical position in any direction, and a device for rigidly securing said standard in diierent positions to which it may be adj Listed, substan.

tially as specitied.

3. The combination, in a dental engine, of a base, a standard, a driving-wheel and crank supported in said standard, a treadle, a balland-socket or universal joint between the base and standard, and a rod with a ball-and-socket or universal connect-ion between said treadle and crank, substantially as specified.

4. The combination, in a dental engine, ot' a standard, a driving-wheel supported in said standard and having a crank attached thereto, a treadle adapted to be adjusted around said standard at different angles thereto, and

a rod forming a direct connection between said crank and said treadle, substantially as specitied.

5. 'Ihe combination, in a dental engine, of a driving-wheel, a crank attached thereto, a base comprising an arc-shaped treadle-support, a treadle adapted to be adjusted horizontally upon said support, and a rod forming a direct connection between said treadle and said crank, substantially as specified.

6. The combination of the base A, the arcshaped treadle-support A', the standard B B', the ball-and-socket joint D, the driving-wheel C, the crank C', the treadle C2, rod C3, and radius-link e, all substantially as specified.

7. The combination of the standard B B', the stationary clamping -plate F, the clamping-screw g, the plate g', and spring g2, substantially as specitied.

8. The combination, in a dental engine, of a standard composed of a lower and an upper portion hinged together, a spring attached to one portion and engaging with another IOO IIS

for holding the two portions in line one with the other, and a sheath longitudinally adjustable on said spring for increasingor diminishing its tension, substantially` as specified.

9. The combination, in a dental engine, of a standard composed of a lower and an upper portion hinged together, a spring attached to the lower portion, and a socket adapted to slide longitudinally upon the upper portion, and engaging with said spring, whereby a convenient means is ait'orded for disconnecting the spring from theupper portion, substantially as specitied.

10. The combination, in a dental engine, ot' a driving-wheel, a vertically-arranged conepulley, guide-rollers for deecting a band from the driving-wheel to the cone-pulley, and a i'rame or yoke supporting the eene-pulley and adapted to be vertically adjusted for bringilrgr any step of said pulley opposite the guide pulleys, substantially as specified.

11. The combination ofthe tubular socket H', the vertically-adjustably sleeve 17, the frame I, provided with the stem 7:, fitting' in said sleeve, and the cone-pulley supported in the frame I, substantially as specified.

l2. The combination of the frames I K, hinged together, and the spring p, arranged substantially as specified.

13. 'lhe hinged frames I K, and the hood composed of sections O', the two end sections being,` permanently attached to the said frames,

and the others adapted to telescope or slide one Within the other, substantially as specified.

14. The combination of two shafts, frames I K, hinged together and comprising bearings for said shafts, pulleys m n2, a band, n, passing around said pulleys, and guide-pulleys u for said band, substantially as specified.

15. The combination of the frames I K, hinged together by the pin o, the pulleys m n2, and the guide-pulleys u', supported upon movable studs u, and springs a5 for bearing upon said studs, substantially as specified.

CHAS. I. GROUT.

Witnesses:

FREDK. HAYNES, A. C. WEBB.

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