US1603037A - Recording pencil - Google Patents

Description

F. L. FELTY RECORDING PENCIL Original Filed June 25, 1923 2 Sheets-Sheet 1 v w A f 4 8a n 5" 6 f7? eo Q 0 90 o T o O as O I O 43 .54 I I" N 97"" 0 F161] '1 5 I r I r I I I I I I I F. L. FELTY Oct. 1z,192s.- I 1,603,037

RECORDING PENCIL Original Filed June 25, 19 2 sh 2 Patented Oct. 12, 1926.

UNITED STATES FQANKLIN L. FELTY. OF CHICAGO, ILLINOIS.

RECORDING PENCIL.

Original application filed June 25, 1923, Serial No. 647,542. Divided and this application filed February The present invention relates to a recording pencil for use in tachometer-s or similar instrumentalities, and has particularly to do with the arrangement of the writing bed or surface used therewith, and to the refinement and improvement of the mechanisms of such devices.

The objects of the invention include the production of a recording pencil for indicating by a continuous line the effect of specific external conditions upon an indicating instrument in which the pencil is used.

Other objects of the invention are the provision of an improved assembly for a re cording mechanism, an advance in structural details therefor for simplifying the production and useof such instrumentalities, a refinement of parts and st-ructu 'al details for the attainment of higher efficiency, and generally, a novel writing member for use with a tape-advancing device.

These, and such other objects as may hereinafter appear, are attained by the novel construction, combination, and arrangement of the various parts of the device, all of which are fully disclosed in the specification which follows and in the two sheets of drawing hereto appended and made a part of the specification, and in which Figure 1 is an enlarged top view of the device and a surrounding mechanism, comprising adjacent parts of a tachometer;

Figure 2 is an enlarged detail in elevation of the actuating means for the recording pencil taken on the line 2-2 of Figure 1;

Figure 3 is an elevation of the recording pencil taken on the line 3-3 of Figure 1;

Figure 4 is a detail of the indicator and adjacent scale; and

Figure 5 is a detail taken on the line 5-5 of Figure 3 and looking in the direction of the arrows there shown.

Like reference characters are used to designate similar parts in the drawings and in the description which follows.

Reference should be had to my eopending application for patent, Serial Number 647,- 542, filed June 25, 1923, and from which this application has been divided. As described and shown in said copending application, it is usual to provide a casing or housing for the recording pencil and the mechanisms associated therewith. A connecting member is arranged in such housing for engaging a flexible or other shaft geared to a rotating part of the device, the speed and travel of Serial No. 6,339.

which is to be measured and recorded. Any suitable connector member may be provided between such flexible shaft referred to and the speed indicating mechanism shortly to be briefly described, and which is contained wholly within the case.

In the copending application, a case having a. removable front 30 is provided. To removable front 30 is secured a platform or base 3'? upon which most of the mechanism of the device disposed. Several openings are provided in said front 30 for viewing the recording tape and speed indicator, and other indicators, but one only of these, a recording tape and speed indicator window 31, need be mentioned in this application, said opening being covered with a sheet of glass or other suitable transparent material. An index: 36, declaratory of thc'spec'd of the vehicle upon which the device is used, appears at one end, of window 31.

As bercinaluive indicated, most of the mechanism is disposed upon a platform or base 37 having an angular portion or flange 38 secured to front 30 by rivets or other suitable fastening means, the platform 37 being slightly off-set from said front 30 by bosses 39' or ribs, or by removable bars. To base 37, brackets, preferably also anchored to flange 38, are provided for various rotating parts.

Suitable shafts and gears are provided for translating the rotation of the flexible shaft connectedto the vehicle upon which the instrument is used to the several mechanisms which may be associated with the recording pencil, all of which shafts and gears are set forth in the complete instrumentality described in said previously mentioned copending patent application.

It is in said application disclosed how gearing is arranged to drive a horizontally disposed spindle 48 journalled in brackets carried upon the platform 37. Upon the right hand extremity of said spindle 48, as shown in Figures 1 and 2, is a head 50 having opposed radial lugs. Depending from head .50 and from the oppositely disposed lugs thereon, are ball governors 51 secured by bars 50 having pivot connections in said lugs. Increment of speed causes the balls 51 to fly outwardly from shaft 4C8 wncreby to horizontally move a sleeve 52 upon said shaft 48 and linked to said balls 51 by the members 51 pivoted at each end, such movement being against the resistance of a coil spring 53 disposed intermediate head and sleeve 52. A tensioniug sleeve 5i is disposed upon head 50, and by rotating said sleeve 5%, upon threads on the shaft or spindle spring 53 may be compressed o releaseth t icreby determining the rotatire speed necessary to force outwardly the balls any predetermined dis tance.

it rack slidably disposed in brackets upon platform 37. but here not shown, has at one extremity a roller bearing 57 adapted to be seated said sleeve 52, whereby t impart a line-a d'iplacement of said rack 55 with the changing of the speed with which spindle id is revolved. it rock-shaft 58 is arranged transversely of base or platform 37. and journalled "in brackets or plates secured to the latter. Said shaft is oscillated by a pinion 59 at one end thereof in engagement with rack At the opposite end of shaft 58, an arm (39 is fixedly secured thereto, and by a linlr (31. a pencil carrier (32 having a somewhat triangular flat body and supporting a needle or indicator at one side, is reciprocated Oi) vertically upon guides or tracks 64;, as is shown in Figure 3. The tracks G l may be found by bending a rod into a J-shape and space bars 6% secured to front may be employed to rigidly secure such track 64:. The movement of link 61 is mathematically calculated with respect to sleeve 52 and the intermediate parts so that the movement of pencil carrier 62 along track 64 is directly proportional to the speed above Zero at which the Vehicle upon which the device is used trarels. is clearly indicated. the con nccting members intermediate the rock shaft 138 and pencil carrier (32 are adjustable to enla g'e the sphere of movement of said pencil carrier. On one side of carrier 62 are two grooved bearings and upon its other szde a single grooved bearing for riding on tracks 64:.

Pencil carrier 62 comprises a long narrow tube 65 adapted to receive lead 65% such lead being common in the art. Said tube 65 has an L-shaped slot 6-6 extending rrom the outer end thereof substantially to ITS innermost extremity. The outer end of said slot (36 is enlarged at A follower for such lead comprises a ball 67 (see Figure 1) disposed in said tube and removable therefrom through the enlarged portion (56, and said follower is actuated by pressure exerted thereupon by a pin 68, from which said ball depends, said pin 68 projecting through said slot (36. Pin 68 at its ot er end is pivotally secured to a pair of pivoted arms 69- and 69 the latter being rotatably or pivotally mounted upon a boss 70 on the pencil carrier Intermediate arms (59 and (39, a spring 71 may be em ployed for creating linear pressure againstball 67, the usual way of mounting said spring Tl being to anchor one end upon or about the boss 70 and allow the free end to impinge one side of arm 69.

For convenience in loading pencil tube (5.3, the enlarged section (3(3 of the slot 6 is usually placed in an elbow of tube as shown so that such extension or elbow provides a seat for the ball (3? when the latter is withdrawn from pressing upon the lead in tube 35. Pin 68 and the arm 69 project outwardly in such a degree when the ball 67 is in said elbow that said arm (l9 will engage or impinge against the housing for the device when cover 30 is about to be slipped into such case whereby to prevent the at tempted closing of the cover 30 upon the casewhen the pencil is not in a positive operating position. The link 61 is provided with a plurality of adjustments with res; ect to pencil carrier 62 and lever so that the movement and position of said pencil carrier 62 may be accurately adjusted to meet practical requirements and manujlacturing necessities.

Upon the platform 37 is situated a tape winziling mechanism, the tape carried there by being marked by the lead in tube 65. Upon base 37 is disposed a spindle (not shown) adapted to receive av roll of suitable recording paper or tape 88, which paper is first-threaded about a guide pulley 89 and thence onto a spindle 90 driven by a gear (not shown) and upon which a shell 91 having at its upper end a plurality of pins or notches 92 is locked into engagement by a pivoted handle or latch member 92 preferably upon the axis of spindle 90 and adapted to be folded downwardly intermediate two of pins 92 when the device is in an operable or recording position. (See figure 1.) Latch 93 is adapted to project upwardly sutliciently that when shell 91 is not locked upon spindle 90 it presents an obstacle engaging the instrument case whereby to prevent front 30 from being secured thereto.

After passing about shell 91, the tape 88 is again brought to bear upon guide pulley 80 and the portion of tape pulled thereover is drawn across opening 31 and to a second guide pulley and from thence to a receiving spindle or winding member, neither of which is shown. Pencil carrier and tube 65 are so positioned that the point of the lead carried by said tube 65 is brought to bear upon the outermost portion of tape 88 as it passes over guide pulley 89 for the second time, thereby recording upon the tape 88 an indication of the speed of the vehicle which marl: becomes immediately visible through opening 31. It will be instantly noted that the pencil impingement i had upon tape 88 where it comprises a double thickness with the result that its im ression is a more clearly defined mark. Suitable means are employed to equalize the movement of tape 88 between the several spindles mentioned.

A recording device comprising a body provided with a tube having a slot therein and an elbowed section, a bar of lead in said member agai nst said lead.

FRANKLIN L. FELTY.

tube, a follower for said lead comprising a ball member and a plurality of levers, said elbowed section forming a seat for said ball member when said tube is being reloaded, and a spring upon said body and engaging said levers for urging said ball

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