US372317A

US372317A - William a

Info

Publication number: US372317A
Authority: US
Publication date: 1887-11-01
Anticipated expiration: 1904-11-01

Description

(No Nlodel.)

W. A. KNOWLES.

I DENTAL ENGINE. A No. 372,317. Patented Nov. 1. 1887.

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wiLLIAMA. KNowLEs, or ALAMEDA, CALIFORNIA.

DENTAL ENGlNE.

` SPECIFICATION forming part of Letters Patent No. 372,317, dated November 1, 1887.

l Application tiled May 14, 1887. Serial No. 238,166. (No model.)

T0 all whom, it may concern.-

Be it known that I, WILLIAM A. KNowLEs, a. citizen of the United States, residing in the city and countyof Alameda and State of California, have invented a new and useful Dental Engine,'of which the following is a specifica:

tion.

My invention relalesto improvements in dental engines, which will be understood by reference to the accompanying drawings and the letters referring thereto.

Figure 1 is a side elevation showing the crane-arm in section and broken ofi' and a broken part of the cable-sleeve; Fig. 2, a side elevation showing the cable-sleeve and cablerod broken off; Fig. 3, a longitudinalsectional elevation of the same, as shown in Fig. l; and Fig. 4` is a side elevation of a machine constructed in the simplest form, without any means of tipping the cable down when not in use. Fig. 5 is an enlarged broken view of the tip-down bracket M, designed to show the stopspring S more clearly than it is shown in Figs. 1 and 2.

A represents the end of any crane lever or arm to which my'improvement is attached;B, the top frame for the reversing-gear and driving-pulley; C, the set-screw for the top of the driving-spindle; D,' the lock-lever for the setscrew O, to preventthe same from loosening; E, the lock-spring, which operates the locklever D to hold it in place; F, the spindle for the driving-pulley and reversinggear; G, the upper, and H' the lower, bevel-wheel of the reversing-gear; I, the driving-pulley; J, the driving-cord; K, thebevel-pinion which drives the cable; L, the supporting-bracket sleeve shown in Fig. 4, and M the pivoted bracket shown in Figs. l, 2,. and 3; N, the pivot, by means of which the bracket M is hinged; O, the lock-lever for holding the bracket M in gear; P, the thumb-piece for operating the 1edriving pinion; V, the head-block for the cable-sleeve; W, the eablesleeve.

X represents the adjusting-collar; Y, the set-screw for setting the adj listing-collar fast.

Z represents the stop-rest by which the machine is held in gear.

A represents the vertical guide-slot in the 4bracket M, to allow the post U to be raisedY and lowered and the gear to be reversed.

B represents the adjusting-pin which is attached to the post U, and operates through the vertical guideslot Aand the cam guideslot R.

C represents the'cable-rod.

D represents the spring which returns the lock-lever O.

E represents the hanging pivotpost, which forms the bearing for the supporting-bracket sleeve L and the step or bearing for the spindle F to revolve in.

G represents a stop.

The following is the operation of my im! proved engine: In Fig.- l the pinion K is shown in gear with the bevel-wheel H, and the driving-cord J revolves the pulley l continuously in the same direction. The thumb-piece T is now thrown out to the left and held in that position bythe cam or inclined spring-cam S, while the pin B', being held at one position laterally, is forced down by means of the angular slot R, thus keeping the pinion K in gear with the bevel-wheel H and revolving the same in a corresponding direction. To reverse the action of the pinion K, the thumb-piece T is operated, turning the cam-sleeveQand moving the slot R over the pin B', thereby raising the pinion K up against the wheel G and caus- .ing it to revolve in the opposite direction.

As the thumb-piece T is passed over the spring cam-stop S, the stop S rises up behind the same, thus holding it in place and the pinion K in gear, as has been shown. It will be seen that as the supporting-sleeve L has its bearing upon the hanging-post E and revolves concentrically withthe spindle F, it may be revolved about four-fifths of a revolution, thereby allowing the drill-cable to be used in any rel quired direction horizontally.

The object of employing the collar X is to .any unnecessary vertical movement in the f1t- ICO -the pivot N.

ting upon the hangingpost E. Vhen it is required to tip the cable down, (as is euston1- ary for preserving the ilexible eable,) the looklever O is tipped down by pressing the thumbpiece I), and the stop-rest Z is released and the cable is turned down, the bracket turning upon Vhen raised again, it is only necessary to raise the cable-sleeve XV to a horizontal position,when the stop rest Z passes to the end ofthe lock-lever O, and the spring D throws the lock -lever O in behind the same, thereby locking the pinion K in gear with either the bevel-wheel G or H, as it may be set.

The set-screw Gis furnished with a concave bearing for the top of the spindle F,and when turned tothe right point for the required bearing the catch-lever D is dropped between the eogs, and holds the saine from turning back. The lever D is held in Contact by the spring E, as shown in Figs. 1 and 3.

Having thus described niy invention, what I claim, and desire to secure by Letters Patent, is, in dental engines- 1. The combination, with a crane or supporting-arm A, of the top franie, B, the conebearing C, the lock-lever D, the spring E, and the hanging pivotpost E', for the purpose of supporting and adjusting the spindle F, and gear G, H, and constructed and 0pcrated substantially as and l'or the purposes set forth.

2. The Combination, with a crane or supporting-arm, A, ofthe top frame, B, the conebearing C, the loeklever D, the spring E, the

hanging pivot-post E', and the adjusting-e01- lar X and set-screw Y, for the purpose of supporting and adjusting the spindle F, the gear G, H, and I, and furnishing a bearing and adjustment for the supporting sleevebracket L, constructed and operated substantially as and for the purposes set forth.

3. The combination, with a crane or supporting-arm A, having a top frame, B, of a eene-bearing C, the lock-lever D, spring E, the hanging pivot-post E', the adjusting eollar X, the supporting-bracket sleeve L, with lever O and P, and spring D', for the purpose of adjusting and operating the tip down bracket M, constructed and operated substantially as and for the purposes set forth.

4. The bracket M, hinged at N, having the spring eain or stop S, the vertical slot A,and the lock-notch Z and stop G', in Combination with the earn-sleeve Q, having the angular slot R, and thumb piece T, and with the attaching pivot-post U, having the adjusting-pin B',and with the supporting-brachet sleeve L, having the lock-lever O, with thumb-piece l), and spring D, for the purpose of releasing the tip-down bracket M, allowing the eablesleeve V to swing horizontally, and for reversing the movement of the drill-cable, constructed and operated substantially as and for the puposes set forth.

YVILLTAM A. KNO\VLES.

Witnesses:

JOHN H. RnDs'roNn, J. H. BLOOD.