US807306A - Variable-speed mechanism for glass-working machines. - Google Patents

Description

"No- 807,306. PATENTED DEC. 12, 1905.

H. B; MURDOGK.

VARIABLE SPEED MECHANISM FOR GLASS WORKING MACHINES.

APPLICATION FILED 11110.4, 1904. RENEWED MAY 21, 1905.

;4LK-u- W/[rV/g 1211125525 I @muwiur ga git-arm UNITED STATES HORACE B. MUItDOOK, OF DETROIT, MICHIGAN.

VARIABLE-SPEED IVIECHANISIVI FOR GLASS-WORKING MACHINES.

I Specification of Letters Patent.

Patented Dec. 12, 1905.

Application filed August 4, 1904. Renewed May 27,1905. Serial No. 262.680.

To all whom, it may concern.-

Be it known that I, HORACE B. MURDOOK, a citizen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Variable-Speed Mechanism for Glass-Working Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to im rovements in variable speed gears especizilly applicable for use in connection with glass cutting or polishing machines, and particularly relates to that class of variable-speed mechanism wherein the driven shaft is provided with a friction-wheel adapted to be moved radially along a friction-disk carried by the drivingshaft.

The object of the invention, in addition to providing means for varying the speed of the grinding, olishing, or other rotary tool, is to also provi e novel means for shifting the friction-wheel along the driven shaft and securely locking same in its adjusted position when so shifted.

Other objects and advantages will appear from the following description, and the novel features of the invention will be more particularly pointed out in the claims.

To more fully understand the invention, reference is had to the accompanying drawings, forming apart of this application, in which like numerals and letters designate corresponding parts in the several views, and in which Figure 1 is a plan view of a machine with my invention applied thereto; Fig,2, a view in side elevation; Fig. 3, a view in front elevation; Fig. 4, a detail horizontal section through the driven shaft, friction-wheel, and mechanism for shifting said friction-wheel; and Fig. 5, a transverse section in detail through the driven shaft, showing means for locking the same thereon against independent rotary motion.

In the preferred embodiment of my invention I provide a framework 1 of suitable structure provided with the top plate 2, having an aperture 3 therethrough. 4 represents transverse tie-rods, which may be ordinary piping and which extend beyond the end faces of said framework, formin a support for tanks 5, located beneath an adapted to catch the water from the grinding or cutting tools. 6 represents vertical rods suitably supported by said framework and top plate, and pivotally mounted at the upper end of said rods are swinging brackets 7, adjustably held in any position by the setscrew 7 a and provided with a pivotallymounted support 7 for the work, which sup port 7 may be locked by the adjustmentscrew 7 8 is a similar bracket mounted below the bracket 7 on the uprights 6 and provided with the set-screw 8 a swiveled seat 8*, and a set-screw 8 for obvious purposes.

In Fig. 3 I have shown the work-supporting bracket mounted on one of the uprights 6, while the operator s seat is swung on the other support but it is obvious that the bracket 7 may be duplicated on the other side for swinging the work into position with respect to the rotary tool at the opposite end of the machine. When not in use, the worksupporting bracket and seat may be folded inward out of the way, as illustrated in Fig. 1.

Referring now to the driving mechanism, a designates the driving-shaft, loosely journaled in suitable bearings on the top plate 2 and capable of limited longitudinal movement. The end of this shaft is provided with the friction-disk A, operating through the slot 3 and provided with the central aperture A", the free end of the shaft being engaged by a set-screw a, fora purpose hereinafter referred to. Any suitable mechanism may be employed for driving the shaft a; but for the purpose of illustration I have simply shown the pulley a thereon driven by the cable a J ournaled in suitable hearings on the top plate 2 is arranged the driven shaft or workarbor b, disposed at right angles to the driving-shaft and provided with the customary rotary tools 9. This shaft is provided with a plurality of angular grooves b disposed longitudinally thereof, and mounted on said shaft is the friction-wheel B, provided with similar-shaped grooves B in cross-section, adapted to aline with the grooves b", but of a varying depth longitudinally to receive the longitudinally-beveled diamond-shaped keys 0, secured at one end to a collar C, provided with the annular slot 0.

The friction-wheel B is preferably pro- 'vided with a projecting hub B, formed integral therewith, having the annular slot B therearound.

D is a rod suitably mounted in the supwheel, and a lever pivota ports (1 on the top plate 2 and is disposed substantially parallel with the driven shaft or arbor b. Slidably mounted on this rod D is a sleeve E, provided with an inwardly-extending yoke or arm e and an outwardly-extending handle 6. F is a lever having the centrallyenlarged ortion F apertured to encircle said sleeve I and pivotally secured thereto, as at f". This lever F at its inner end f operates in the annular groove 0 and at its outer end f forms a handle cooperating with the extending arm (2 for operating the locking mechanism for the friction-wheel.

The operation of the mechanism is apparent from the foregoing, but will be briefly summarized. When it is desired to change the speed of the arbor or driven shaft, the handles 6 and f are forced apart, withdrawing the keys 0 from engagement with the internal grooves of the friction-wheel B, when the wheel is shifted by means of the sliding sleeve E, the arm or yoke e engaging within the annular slot B of the friction-wheel. The desired degree of speed having been determined, the keys 0 are forced between the friction-wheel and its shaft, securely keying the same in its adjusted position. If it is desired to stop the motion of the tool-arbor, the friction-wheel B is shifted to the center of the friction-disk A and when opposite the aperture A will be out of contact therewith. It will be seen that the frictional contact be tween the disk A and the wheel B may be adjusted to a nicety by the adjustment-screw a. It is obvious that certain modifications might be made in the general construction and arrangement of the operating parts of my invention as hereinbefore described, and I donot wish to be limited to the, exact details disclosed.

What I claim is 1. In a variable-speed mechanism, the combination with a driving-shaft and means for rotating same, of a friction-disk carried by said shaft, a driven shaft disposed at right angles thereto and provided with a longitudinal groove, a friction-wheel carried by said driven shaft and slotted to register with said groove, a key operating in said groove and slot, means for shifting said friction-wheel along said driven shaft in engagement with the face of said friction-disk, and independent means for operating said key for securely keying said friction-wheel to its shaft when shifted.

2. In a variable-speed mechanism, the combination with a driving-shaft and means for rotating same, of a friction-disk carried by said shaft, a driven shaft disposed at right angles thereto and provided with a longitudinal groove, a friction-wheel carried by said driven shaft and slotted to register with said groove, a key operating in said groove and slot, a sliding arm enga ing said friction- Ily carried by said sliding arm and operatively connected to said key.

3. In a variable -speed mechanism, the combination with a driving-shaft and means for rotating same, of a friction-disk carried by said shaft, a driven shaft disposed at right angles thereto and provided with a longitudinal groove, a friction-wheel carried by said driven shaft and slotted to register with said groove, a key operating in said groove and slot, a hub carried by said friction-wheel provided with an annular slot, a collar secured to said key provided with an annular slot, a sliding arm engaging the annular slot of said hub, and a lever pivotally carried by said sliding arm and engaging at one end the annular slot of said collar.

4. In variable-speed mechanism, the combination with a driving-shaft and means for rotating the same, of a friction-disk carried by said shaft, a driven shaft disposed at right angles thereto and provided with a plurality of longitudinaly-disposed V-shaped grooves, a friction wheel carried by said driven shaft and provided with a plurality of V-sha ed slots to register with said grooves, a plura ity of keys having angular faces 0 erating in said grooves and slots, means for shifting said friction-wheel along said driven shaft in engagement with the face of said frictiondisk, and indepandent means for operating said keys.

5. In a variable speed mechanism, the combination with a driving-shaft and means for rotating same, of a centrally-apertured friction-disk carried by said shaft, a driven shaft disposed at right angles thereto and provided with a longitudinal groove, a friction-wheel carried by said driven shaft and slotted to register with said groove, a key operating in said groove and slot, means for shifting said friction-wheel along said driven shaft in engagement with the face of said friction-disk, and independent means for operating said key for securely keying said friction-wheel to its shaft when shifted.

6. In a variable-speed mechanism, the combination with a driving-shaft and means for rotating same, of a friction-disk carried by said shaft, a driven shaft disposed at right angles thereto and provided with a longitudinal groove, a friction-wheel carried by said driven shaft and slotted to register with said groove, a key operating in said groove and slot, means for shifting said friction-wheel alon said driven shaft in engagement with the face of said friction-disk, independent means for operating said key for securely keying said friction-wheel to its shaft when shifted, and means for regulating the degree of contact between said disk and wheel.

7. In a variable-speed mechanism, the combination with a driving-shaft and means for rotating same, of a centrally-apertured friction-disk carried by said shaft, a driven shaft disposed at right angles thereto and provided with a longitudinal groove, a friction-wheel carried by said driven shaft and slotted to register with said groove, a key operating in said groove and slot, a sliding arm engaging said friction-wheel, and a lever pivotally carried by said sliding arm and operatively connected to said key.

I 8. In a variable-speed mechanism, the combination with a loosely-journaled driving-shaft and means for rotating same, of a friction-disk carried by said shaft, a driven shaft disposed at right angles thereto and provided with a longitudinal groove, a friction-wheel carried by said driven shaft and slotted to register with said groove, a key operating in said groove and slot, a hub carried by said friction-Wheel provided with an annular slot, a collar secured to said key provided with an annular slot, a sliding arm engaging the annular slot of said hub, a lever pivotally carried by said sliding arm and engaging at one end the annular slot of said collar, and means for regulating the degree of contact between said friction disk and wheel, comprising a set-screw engaging the free end of said loosely-journaled driving-shaft.

In testimony whereof I affix my signature in presence of two witnesses.

HORACE B. MURDOOK.

. Witnesses:

H. H. HAGER, M. D. LINToN.

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