US629836A - Machine for trimming stereoscope-hoods. - Google Patents

Description

N0. 629,835. Patented Aug. I. I899. H. 0. WHITE 8. C. LEFFLEFL MACHINE FDR TBIIMMNG STEREOSCOPE H0008 (Application filed Sept. 16, 1897.)

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Nu."629,836. Patented Aug. l, &899.

H. C. WHITE 8'. C. LEFFLER.

MACHINE FOR TRIMMING STERE'USCOPE HOODS.

(Agplication filed Sept. 16, 1897.; '(No Madal.) 4 Sheets-Sheet 3.

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Patented Aug. I, I899.

H. 0. WHITE & G. LE FFLER.

, MACHINE FOR TRIMIMNG STEBEOSGOPE HOBBS.

(Application filed Sept. 16, 1897. illolodel.) 4 Sheets-Sheet 4.

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UNITED STATES PATENT OFFICE.

HAWLEY 0. WHITE, OF NORTH BENNINGTON, VERMONT, AND CHARLES LEEELER, OF NEW YORK, N. Y., ASSIGNORS TO THE H. 0. WHITE oOM- PANY, OF NORTH BENNINGTON, VERMONT.

MACHINE FOR TRIMMING STEREOSCDPE-HOODS.

SPECIFICATION forming part of Letters Patent No. 629,836, dated August 1, 1899.

Application filed September 16, 1897. Serial No. 651,850. (No model.)

To all whom, it may concern:

Be it known that we, HAWLEY 0. WHITE, residing at North Bennington, in the county of Bennington and State of Vermont, and CHARLES LEFFLER, residing at New York, (Brooklyn,) in the county of Kings and State of New York, citizens of the United States, have invented certain new and useful Improvements in Machines for Trimming Stereoscope-Hoods; and we do hereby declare the following to be afull, clear, and exact description of the invention, suchas will enable others skilled. in the art to which it appertains to make and use the same.

This invention relates to machinery for automaticall y trimming the edges of stereoscopehoods to fit the human face. The style of hoods in most common use at the present time are made of veneers or thin laminae of wood laid up in glue with the grain of'the wood transversely crossed and are bent into the form of an elliptical cylinder. The trimming is accomplished by meansof a central vertical block for holding the hood of such dimensions that the hood maybe slipped down over the same, a series of sliding cutter-heads carrying properly-shaped knives orcutters, a

' corresponding series of guides upon which the cutters are mounted arrangedradially around the central block, and "a cam located beneath the guides and revolving about a ver- 7 upper part of the machine.

tical axis concentric with the central block and adapted to cause the said cutter-heads to successively approach and recede from the central block by engaging projections on their lower sides, byaneans of which motion the knives are brought into contact with the hood and the trimming is effected;

The above-mentioned elements, with their necessary accompaniments, together with suitable mechanism for driving the cam, coustitute our invention,"the' same being illus= trated by the accompanying drawings.

Figure '1" is a 'planview of the machine. Fig. 2 is a half side elevation and half-section, taken on the line A B of Fig. 1, of the Figs. 3 and 4: are details of a clamp for holding the hood.

' Fig. 5 is an end elevation of the complete machine, the driving-pulley only being ofnit ted. Fig. 6 is a side elevation of some of I the parts for controlling the driving devices, "of which Figs; 7, 8, 9, and 10 are details.

Fig.11 represents the hood to trim which the machine is designed. Fig. 12 is an elevation ofone of the cutter-heads, together with its knife and its canrengaging member.

Figs.

13 and 14 are respectivelyplan and elevation of the holder for the central block, which slightly-raised surface or boss is attached a holder 14: by means of screws 14*. Upon this holder rests the central cutting-block 15, made of hard wood or iron and secured to 14 by dowel-pins 14 and stud 14, a loose collar 14 on upper end of 14 being held down against the block 15 by the washer 1-? and screw 14 Figs. 1, 2, and 5'sl1ow the hood-blank 27 in place on the block 15. This hood is shown in detail in Fig..11,the dotted outlines representing the original shape before triniming and the full lines the form for fitting around the forehead and nose of the observer, to which shape it is cut by the machine. About the block 15 is cut a groove 15 of the same shape as the trimmed edge of the hood. This groove is filled with some soft metal, as lead or Babbitt, which forms a backing for the severed edge of the hood and also a stop against which the knives may impinge withoutinjury. Projections 15". carry this groove 15 slightly below the bottom of'the block, so as to insure a perfect backing of the whole line of cut. Finger-recesses in the top-cornor of the block 15 facilitate the removal of the detached edging aftenthe -hood has been trimmed.

'At opposite ends of the longer diameter of the block 15 are levers 24c with fulcra at 25, the levers at their inner ends entering notches l t provided therefor in the holder lei and resting upon the bed 1 and having beneath their outer ends springs 26 to keep the inner endsidown in place upon the bed-plate. The

inner ends of these levers 24 act as stops or supports against which the hood is pressed when placed upon the block, and after the cut is finished and the severed portion removed hand-pressure simultaneously applied to the two outer ends of the levers raises the hood, so that it may be grasped and removed by the fingers. Apair of clamping- jaws 20 and 22, with tops curved approximate to and just below the line of out, are located opposite the fiat sides of the block for the purpose of clamping the. hood firmly to the block. From the back of the jaw projects a rod 21, which terminates at the back of the table in a rack 21, having downwardly-projecting teeth which engage the upperside of the pinion 17, as seen in Figs. 1 and 5. A similar rod 23 projects from the lower part of the jaw 22 and passes through a hole 14 in the blockholder 14 to the back of the table, where it terminates in a rack 23, which engages the under side of the pinion 17, as in Figs. 1 and 5. By means of a hand-lever 19 upon the shaft 18 of the pinion 17 the clamps may be drawn up against the hood. A housing 16 projects upwardly from the table and forms a bearing for the pinion'shaft, as well as a guide for the racks. The lever 19 has a backwardly-projecting arm 19, which brings up against a stop 19 when the lever is thrown clear back and the clamps are wide open.

Five cutter-heads carrying knives are arranged about the cutting-block, as seen in Figs. 1, 2, and 5, each mounted upon sliding ways and adapted to be moved back and forth thereon by the cam 28, located beneath the bed. These cutter-heads are all of similar construction, a detail in elevation of one of them being shown in Fig. 12. Asliding block 5, adapted to slide between the ways 3 3, has a vertical rib 5, between the high end of which and the inner raised end of the block fits a clamping-piece 8, screwed to the block 5 and carrying two horizontal set-screws, by means of which the endwise or forward projection of the knife may be adjusted. The knife 11, formed of fiat steel bent to the proper shape, rests upon the top of block 5 and is slotted for two main tightening-bolts, which pass downward through the knife into the block 5. A vertical roller 13 is carried upon a downward projection of the block 5 and engages the cam-race 28. The cutterheads (3 differ from 5 only in being wider at the top for the knives 12 and also in having three tightening and adjusting bolts. The cutter-head 4, however, carries two vertical knives 10 10, as shown in Figs. 1, 2, and 5, and is devoid of the vertical rib corresponding to 5 and 6, the method of attaching its cutters being similar to 5 and G. The work done upon the hood by the several knives is shown in Fig. 11, in which the positions from a to Z) are cutbyknives 10 10, bto cby knives 11 11, and c to d by knives 12.

Mounted beneath the table upon the shaft and carried by the bracket 33 is a wheel composed of two partsthe cam-race 28 and a bevel-gear 29. The bracket 33, which is bolted to the table, forms a bearin g for another shaft 32, perpendicular to the shaft 30, to which are keyed a bevel-pinion 31, which engages gear 29, and a clutch-collar 34. Acontinuously-driven pulley 36 is loosely mounted upon the outer end of the shaft 32, its motion being intermittently communicated to the shaft 32 through radial clutch-teeth 37, Figs. 7, 8, and 9, on the inner end of the pulley-hub and a reciprocating tooth on the periphery of collar 34. Upon the bracket 33, below the shaft 32, is secured a bracket 39, Figs. 6 and 10, which furnishes a bearing for a vertically-sliding cam 38. This cam 38 is adapted to rise and enter the groove of collar 34 and there acts to withdraw the tooth 35. The form of the top of the cam 38 is shown by Fig. 9. As the collar 34 revolves the lip of tooth 35 first strikes the cam at 38 being gradually withdrawn thereby until the tooth end of 35 has entirely receded from engagement with the clutch-teeth 37 when the lip strikes the stop 38 and further motion is prevented. A spring 35 forces the tooth 35 into the clutch. At all times when the cam 38 is outside of the groove 34 the tooth 35 is in engagement with the clutch, so that the connection is complete from the driving-pulley to the cutter-knives. A rod 41 forms a downward continuation of the cam 38 and is attached at its bottom end to a treadle 42, so that a downward stroke of the treadle will cause corresponding depression of the cam 38, withdrawing it from the groove of collar 34. Two spiral springs namely, a long spring 43, connected from the table to the treadle, and a smaller one 40, acting between shoulders upon the cam 38 and stand -act to lift the treadle, with the attached cam 38, and return the cam to groove of 34. A latch is provided for holding the cam down and the springs under compression, together with automatic means for releasing said latch at the propertime, so that the cam may enter the groove and stop the machine. This releasing mechanism is shown in Figs. 1, 5, and 10, and consists of a tripping-pin 51, suitably located on the outer face of the camwheel 28. A cooperating cam-lever 45, fulcrumed at 40,with a connecting-bar47 between and a crank 50, which, through a rockshaft 48 and crank 49, forms a virtual bellcrank connection with a pin 44, which passes through the stand 39 and is adapted to enter a notch in the stem of cam 38, which notch comes opposite the pin only when the cam is depressed. The weight 'of the connectingbar 47 acts to force the pin 44 inwardly. Then when the cam is depressed the pin 44 enters the notch in the stem of the cam 38 and holds the cam down until the tripping-pin 51 comes around and through the lever 45 and connections withdraws the pin 44, thus permitting the cam to rise and stop the machine.

Normally the cam is always in the groove of 34 and the machine at rest.

IIO

The operation of the machine is as follows: A hood-blank is slipped down over the cutting-block against the stop-levers 24, and the hand-lever 19 is pulled over, thus clamping the blank, the hand being kept on the lever during all that follows until the cutting is completed. The treadle 42 is next depressed by the foot, thus releasing the tooth 35 and starting the revolution of the cam-wheel 28. The cam-race will revolve until the trippingpin 51, which from the previous operation will have been left at rest just over the lever 45,, swings around and again trips the lever,

stopping the machine. During this one revolution the cam brings each cutter-head separately and successively up to the cuttingblock, thus making the several cuts upon the hood one at a time until at the completion of one revolution the cuts are all made and the machine stops. The hand-lever 19 is then swung back, so as to open the clamps. The severed waste edging is then lifted from the block with the fingers. The two levers 24 are then depressed,thus lifting the trim med hood, so that its projecting edge may be grasped and the trimmed hood removed, when a new one may be blocked and the operation may be repeated.

We therefore claim as our invention the following: o

1. The combination in a stereoscope-hoodtrimming machine of a cen trally-located hoodblank-supporting block, clamping devices for confining the hood-blank to the block, a series of knife-edge cutters for acting on the blank arranged to move on lines radiating from the block, and means for successively actuating said cutters to trim the blank.

2. The combination in a trimming-machine of a centrally-located hood-blank-supporting block, and a series of knife-edge cutters for trimming the hood-blank arranged to move on lines radiating from the block, and means for successively actuating said cutters to trim the blank.

3. The combination in a machine for trimming stereoscope-hoods, of a blank-support ing block, a series of ways radiating from said block upon which movable slides, each fitted with aknife-edge cutter, are adapted to be reciprocated, a rotating device beneath said slides having a single provision in connection with said slides for-individually and successively actuating them one at a time to trim the hood-blank.

4. The combination in a machine for trim= ming stereoscope=hoods, of a hood-blank-supporting block, clamping devices for confining the hood-blank to the block, a series of sectional knife-edge cutters and means for actuating the same adapted to successively trim apart only of the edge of the blank at a time, and means for detaching the trimmed blank from the block after the completion of the trimming process.

In testimony whereof we affix our signatures in presence of two witnesses.

HAWLEY 0. WHITE. CHAS. LEFFLER.

Witnesses as to White:

FRANKLIN Soo'r'r, VERA L. BULL.

' lVitnesses as to Leffier: WM. JANsoN, HENRY Bio.

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