US845687A

US845687A - Cutting and grinding machine.

Info

Publication number: US845687A
Application number: US28539605A
Authority: US
Inventors: Fredrick H Brown
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-11-01
Filing date: 1905-11-01
Publication date: 1907-02-26
Anticipated expiration: 1924-02-26

Description

No. 845,687. PATENTED FEB. 26, 1907.

P. H. BROWN. CUTTING AND GRINDING MACHINE.

APPLICATION rnlm) NOV. 1. 1905.

3 SHEETS-SHEET 1.

PATBNTED FEB. 26, 1907.

s SHEETS-SHEET 2.

fra /775* W5 ADV Q/QZWEZZ F. H. BROWN.

CUTTING AND GRINDING MACHINE. Anucwlwmmm N011. 1905.

No. 845,687. PATENTED FEB. 26, 1907.

' F. H. BROWN.

CUTTING AND GRINDING MAGHINE. Arrmoflron FILED NOV. 1, 1005.

a SHEETS-SHEET s.

FREDRICK H. BROWN, OF LEBANON, NEW HAMPSHIRE.

CU I'TING AND GRINDING MACHINE.

Specification of Letters Patent.

Patented 'Feb.2e,1eo7.

Application fil d November 1,1905. Serial Nb. 285,396.

To all whom, it may concern:

Be it known that I, FREDRICK H. BROWN, of Lebanon, in the county of Grafton and State of New Ham shire? have invented certain new and usefu Improvements in Cutting and Grinding Machines, of which the foilow ing is a specification.

My invention relates-to apparatus for cutting and grinding various objects, and more particularly to a machine for, operating upon the edges of lenses described in the patent to Frank A. Morgan and myself, No. 670,500, of March 26, 1901. Its principal objects are to simplify and generally improve such apparatus. y

In the accompanying drawings. in which similar characters designate like parts throughout the several views, Figure 1 is a top plan view of one embodiment of m invention. lsig. 2 is a vertical section t -erethrough on the line 2 2 oftig. 1. lig. 3' is" a similar view on the line 3 3 of f ig. 1, and 'l ig. 4 is an enlarged detaiL-in end elevation, of the diamond-holding arm.

The numeral designates a base upon which is mounteda casing 11 for a grinding wheel 12, the driving-shaft 13 of which may be journaled inthe-casing and in astandard 14, situated at one side thereof. The width of the casing is such that some lateral movement of the grinding-wheel in it is permitted. At the end of the driving-shaft opposite the standard is shown a pulley 14 by means of .which'rotation may be imparted to the shaft and wheel from some suitable source of pop er.

I 1 Near the front of the base are a pair of lugs 15 15, perforated toreceive and furnish bearings for ashaft 16. Sw ingingupon this shaft tow ard' and from the-wheel is a carrier 17, provided w ith separated arms, one having an index-dial 18, and in which arms are rotatably and longitudinally movable spindles 19 19 for lenscla'm s or work-holders 2O 20. The mounting 0 these spindles is fully set forth in the patent above referred to. 1. ixed upon each spindle outside its arm is a gear 21, meshing with a larger gear 22, fast upon the end of the shaft 16. Just inside the gear 22 which is nearest the standard 14 is secured a worm-wheel 23, having cooperating with it a worm 24, fixed to a shaft 25. This rounding the shaft 13 and bearing at its inner end about a cylindrical extension 28 from the casing. The sleeve is split longitudinally at one side, and upon opposite sides of the' openings are lugs 29, threaded to rece1ve a clamping-screw 30, which has at its upper 1 end an operating-crank 31. This 0 amp serves to fix the position of the sleeve upon the extension, allowing the worm to be swung into gear with its wheel to impart a longitudinal feeding movement to the workholder or thrown out. Secured upon the feeding-shaft, adjacent to thesleeve, is a spiral gear 32, meshing w ith a similar gear 33, situated in a chamber in the end of the sleeve and splined upon the shaft 13, so that it is compelled to rotate therw ith, while permitting the shaft to move longitudinally through it. The gear 33 is retained w ithin the sleeve.- chamber by a screw-cap 33 threaded into the outer end of the sleeve. Depending from the sleeve between the arm and the wheelcasing is shown a securing-arm 34, having an opening 35, containing a contact surface, which may be furnished by a transverse pin 36. With this pin may contact one of a series of teeth 37, formed in the edge of a bar 38, which has at its outer extremity afingerpiece 39. To the opposite end of the bar is attached a spring 40, which at its'forw ard extreme engages the downturned end 43 of a controlling-rod 43,-whiclrpasses through a perforated lug 4'4" on the carrier and extends rearw ardly above the spring through an opening 44 in the arm 34. In this opening is a pin or contact-face 45 for coaction with a shoulder or projection 46, by means of which the'controlling member may be fixed in its extreme forvs ard position against the tension of the spring. The rear end of the controlling-rod, as illustrated, is upturned at 47 and carries a finger-piece 48, by which the rod may be depressed to free the projection from its engagement.

When the worm 24 is not in mesh with its Wheel, the shaft 16 may be manually rotated by means of a handle 49, projecting from the side of one of the gears 22. The movement of the carrier toward and from the wheel under the influence of the spring may be limited by a stop-screw 50, contacting with a projection 51, rising from the base.

The hand-feed is particularly used in cutting the edges of lenses, and for this purpose an arm 52 is mounted to swing at the outer side of the carrier between conical-pointed 'screws 53, threaded through lugs 54 upon the carrier. The arm 52 has at its free end mine its position.

- correct position. This abutment by its con-' wall of the bore, and the holder may be retained in a position within the guide member by a projection 58, extending through a slot 59 in the guide and movable into an angularportion thereof. At the end of the guide portion opposite the diamond-holder is shown an enlargement 61, having an opening in which operates a screw 62, controlling the movement of a contact member 63, which may have adjacent to it a scale 64 to deter- This contact member cooperates with the edge of, a pattern-disk 65, fixed upon the holder-spindle opposite the index 18, and when the spindle is rotated and the contact member pressed against the disk it causes the diamond to inscribe upon the lens the outline of the disk. The patterndisk may also contact with an abutment 66, carried by a stem 67, adjustable through a sleeve 68, fixed in a standard 69, supported upon the base. The outer face of this abutment presents the same curvature as the periphery of the wheel and may be adjusted with relation thereto by turning a fingerpiece 70 to shift the spindle within the sleeve, a scale and index-point 71 indicating' the tact with the pattern-disk when the carrier is drawn inwardly by the spring causes the edge of the lens to be uniformly presented to the grinding-surface of the wheel throughout its rotary movement, this rotation being effected by the automatic feed.

The end of the shaft 13 is shown as extending but a short distance into the bearing a in the standard 14 and may there be provided with a ball or antifriction member'72 for contact with the adjacent end of a head or sliding member 72. In this head is an opening 73, movable in alinement with a slot 74' in a standard-bearing to receive a spring 75, which may be fixed at its lower en to the standard. The opposite end of the driving-shaft may have a second ball or antifriction member 76 for contact with the inner face of a cam-disk 77, fixed at the center of a Wheel 78, journaled upon a standard 78 Over this Wheel and a-relatively small wheel 79, which may be furnished by a hub upon the end of the roljacent gear 22, passes a belt 80, by which the cam-wheel is rotated from the feed-shaft 16. The tension of the spring is communicated to the driving-shaft through the head, forcing the opposite extremity of the shaft against the disk and causing this member to reciprocate the shaft across the work-holder, the extent of this reciprocation preferably being substantially equal to the width of the grindingface.

,of the projection therewith, this The general operation of this machine is similar -to that described in the patent; but it may be said that the lens is fixed between the holder members adjacent to the index, with the position of its axis determined thereby. At this time the clamping-screw 30 is loosened, freeing the engagement of the sleeve with the casing extension and allowing the spring 40 to exert its tension, (this being adjusted to the proper degree by the engagement of one or another of the teeth 37 with the contact-pin,) to raise the arm 26, throwing out the automatic ieed and at the same time through the controlling-rod swinging the carrier outward, The arm 52 is now raised and the diamond allowed to contact with the lens under the influence of the spring 57. Then upon applying the handfeed the lens may be rotated to-' cause the spring draws the carrier inwardly, so thatthe pattern-disk may contact with the abutment. The automatic feed now rotates the ilens so that its edge is ground by contact with the wheel. It should be noted that in addition to this function of raising the arm and drawing up the carrier the spring also acts upon the controlling-rod to raise it into coaction with its contact-face to insure en agement eing secured'by the attachment of the spring to the angular end of the controlling-rod. Attention may be further called to the fact that the reciprocation of the wheel across the edge of the lens to revent scoring instead of a movement of t e lens-holder simplifies the structure and obviates" the necessity of employing a flexible transmittingshaft or the like.

Having explained-the nature of my invention, I claim 1. A-grinding-machine comprising alongitudinally-movable shaft, a grinding-wheel carried thereby, a camfor moving the shaft, a holder cooperating with the wheel, means for rotating the holder, and means for operating the cam from the holder-rotating means.

2. A grinding-machine comprising a longitudinally-movable shaft, a grinding-wheel carried by said shaft, a cam-wheel cooperating with the shaft near one extremity, a head contacting With the opposite end of the shaft and being movable independently I thereof, a spring exerting its-tension upon the head to force it against the shaft, and a holder cooperating with the grinding-wheel.

3. The combination with a driving-shaft, of a member for operating upon the work, a movable work-holder, a bodily-movable intermediate, shaft, gearing connecting said in .termediate shaft with. the driving-shaft and holder, and means for simultaneously moving the workholder and intermediate shaft, the latter eflecting a change in the relation to the gearing.

4. The combination with a driving-shaft, of a member for operating upon the work, a movable work-holder, a bodily-movable intermediate shaft, gearing connecting said in.-

termediate shaft with the driving-shaft and bolder, and a spring operating to simultanework, a movable work-holder, a swinging member, a shaft journaled in said member, gearing connecting said shaft with the driving-shaft and holder, and a spring exertin its tension upon the swinging member an holder.

7. The combination with a driving-shaft, of a member for operating upon the work, a movable work-holder, a swinging member, a shaft journaled in said member, gearin connecting said shaft with the driving sha t and holder, and a spring exerting its tension upon the swinging member and holder, and means for varying-the point of attachment of the 8. The combination with the drivingshaft, of a member for operating upon the work, a movable work-holder, a swinging member, a shaft journaled in said member, gearing connecting said shaft with the driving-shaft and holder, a controlling member for the holder, and a spring exerting its tension upon the controlling member and holder.

9. The combination with a driving-shaft, of a member for operating upon the work, a movable work-holder, a sleeve which may turn about the driving-shaft, an arm projectinglfrom the sleeve, a shaft journaled in the arm, gearing connecting the arm-shaft with the driving-shaft and holder, and means for fixing the position of the sleeve about the driving-shaft.

10. The combination with a driving-shaft, of a member for operating upon the work, a movable'work-holder, a sleeve which may turn about the driving-shaft, an arm projecting from the sleeve, a shaft journaled in the arm, gearing c'onnectin the'arm-shaft with the driving-shaft and holder, a spring operating toboth turn the sleeve and move the holder, and means for fixing the position of the sleeve about the driving-shaft.

11. The combination with a driving-shaft, of a member for operating upon the work, a movable work-holder, a sleeve which may turn about the driving-shaft, an arm pro- ,jecting, from the sleeve, a shaft journaled in the arm,-- gearing connecting the arm-shaft with the driving-shaft and holder, a controlling member for the holder, and a spring connecting the controlling member and sleeve.

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

FREDRICK H. BROWN. Witnesses:

I. N. PULEY,

HENRY M. DAY.