US981464A - Wall-paper perforator. - Google Patents

Description

T J.-NASHE WALLPAPER PBRFORATOR. APPLIOA'I'ION FILED APR. 16, 1910.

Piatented Jan. 10, 1911.

7 I IIVI/IE'IIITOH ThoaNas fl/ W/T/VESSES. w 1%4/ WWW tinrrn sitar THOMAS J. NASH, OF LINCOLN, NEBRASKA, ASSIGNOR 'IO CAPITAL NOVELTY COMPANY, OF LINCOLN, NEBRASKA, A CORPORATION.

WALL-PAPER PERFORATOR.

Specification of Letters Patent.

Patented Jan. 10, 1911.

Application filed April 16, 1910. Serial No. 555,884.

T 0 all whom it may concern:

Be it known that I, THOMAS J. Nnsn, residing at Lincoln, in the county of Lancaster and State of Nebraska, have invented certain new and useful Improvements in all-Paper Perforators, of which the following is a specification.

This invention is an improved wall paper perforator and it generically has for its object to provide a device of the character stated of a simple and effective construction which can be cheaply manufactured and which will readily serve its intended purposes.

Heretofore wall paper perforators have been provided in which both rotary and reciprocating electric motors have been employed but they have usually been of complicated structure, thereby resulting in too great expense for manufacture, and furthermore no adequate provision has been made to overcome friction in the moving parts and undue loss of power.

It is therefore one of the primary objects of this invention to overcome these defects, and to this end I provide the rotatable electric motor of any approved type mounted on a suitable base which slides over the work, the motor frame carrying the support for the needle holding guide, the construction of which guide and of the needle holder, together with its connection with the motor, forms one of the essential features of the invention. The needle holder guide is of tubular form and receives a tubular needle holder and acts as a support therefor. The holder has a grooved curved segment or seetor in which the crank pin of the motor balance wheel operates, the curvature of the. segment or sector bears such relation to that of the path of movement of the crank pin that a quick motion will be given to the needle holder at the lower part of its stroke and a slower movement will be imparted thereto through the upper part of its stroke, thus allowing a shorter stroke to be used to reduce the friction of the moving parts.

Another object of my invention is to provide for suitably lubricating the needle holder on its bearing or support in a mannor to prevent the lubricant running or dropping down onto the work.

The invention also resides in those novel details of construction, combination and arrangement of parts all of which will be first fully described and then be specifically pointed out in the appended claims and illustrated in the accompanying drawings, in which:

Figure 1, is a perspective view of the invention. Fig. 2, is a central vertical longitudinal section, the motor being shown in elevation with a part of its casing broken away and shown in central section. Fig. 8, is a front end view of the invention. Fig. i, is an inverted plan view thereof.

Referring now to the accompanying drawings in which like letters and numerals of reference indicate like parts in all of the figures, l designates the base which is pro vided with the upwardly projected body a having a seat 5 in its upper surface to receive the motor 6 which is secured to the base by a machine screw 7. The base 1 is formed with an integral U-shaped runner 2 of circular cross section, as shown at 3, to present smooth rounded surfaces to the work on which the invention is being used.

8 is a block or rod having a reduced threaded portion 9 that projects through an aperture in the casing of the motor 6 and is secured to the motor frame by check nuts 10 and a machine screw 11 which engages the part 9 of the support 8 to prevent turning thereof. The support 8 is drilled at 12 to receive a tube 14 which is held in place by a set screw 15 and which forms the needle holder guide and bearing member.

The needle holder consists of a tube 16 closed at its lower end and slidably fitted onto the guide 14:, as clearly shown in Fig. 2 of the drawings, by reference to which it will be observed that the needle holder closed end 17 is bored at 18 to receive the needle 19 which is held in place by a set screw 20.

21 is a curved segment or sector which is bored to tightly fit onto the needle holder 16 to move therewith and which is provided with a curved groove 22 of a curvature in excess of that of the path of movement of the crank pin 24 that operates in the groove 22 for a purpose hereinafter stated. The crank pin 24 is rigidly secured to the balance wheel 23 that is mounted on the motor shaft 26 and the pin 2% carries an anti-friction roller 25 within the groove 22, as shown in the drawings. By curving the groove 22 on the arc of a circle having as its radius a length greater than that of the radius of curvature of the path. of movement of the pin 24 a quicker travel of the needle holder will be induced during the time the crank pin 24 is passing through the lower half of its path of movement than will be imparted to the needle holder during the time the crank pin 24 is passing through the upper half of its path of movement thereby insuring a quick entry and withdrawal of the needle 19 into the work and the slower movement of the needle holder from the work upward and back to the work again, thus reducing the friction in the moving parts by enabling a shorter working stroke to be used than in other machines which have come to my attention.

By making the needle holder 16 of tubular form and closed at its'lower end and by making the guide 14 open-ended to fit into the needle holder, lubricant 27 may be admitted into the tube 14 which acts as a reservoir so as to always maintain the surfaces of contact between the moving part 16 and the guide 14 fully lubricated to reduce the friction on the contacting parts.

From the foregoing description taken in connection with the accompanying drawings, it is thought the complete construction, operation and advantages of my invention will be readily understood by those skilled in the art to which the invention appertains.

What I claim is:

1. A base, a rotatable shaft electric motor mounted on said base, a support secured to said motor over the projecting end of the motor shaft, a needle guide carried by said support, a needle holder telescopically mounted on said guide and connections between said motor shaft and said needle holder for reciprocating the same.

2. A base comprising a body, and a U- shaped runner portion, a rotatable shaft electric motor secured to said base, a support secured to said motor and projecting over the end of the motor shaft, a needle holder guide carried by said support, a needle holder mounted on said guide, and operative connections between said motor shaft and said needle holder having provisions in virtue of which a rapid movement is imparted to said needle holder during the lower portion of its stroke and a slower movement is imparted thereto during the upper portion of its stroke.

3. A base, a rotatable shaft electric motor secured to said base, a support secured to said motor and projecting over the end of the motor shaft, a needle holder guide carried by said support, a needle holder mounted on said guide, and operative connections between said motor shaft and said needle holder having provisions in virtue of which a rapid movement is imparted to said needle holder during the lower portion of its stroke and a slower movement is imparted thereto during the upper portion of its stroke.

4L. A base, a rotatable shaft electric motor having a casing secured to said base, said motor shaft projecting through said casing, a fly wheel mounted on the end of said motor shaft, a support secured to said motor casing and projected over said fly wheel, a needle holder guide carried by said support, a needle holder mounted on said guide, a grooved sector carried by said needle holder, a crank pin on said fly wheel to enter said groove of said grooved sector.

5. A base, a rotatable shaft electric motor having a casing secured to said base, said motor shaft projecting through said casing, a fly wheel mounted on the end of said motor shaft, a support secured to said motor casing and projected over said fly wheel, a needle holder guide carried by said support, a needle holder mounted on said guide, a grooved sector carried by said needle holder, a crank pin on said fly wheel to enter said groove of said grooved section, the curvature of said sector groove being greater than that of the path of movement of said crank pin.

6. A base, a rotatable shaft electric motor having a casing secured to said base, said motor shaft projecting through said casing, a fly wheel mounted on the end of said motor shaft, a support secured to said motor casing and projected over said fly wheel, a needle holder guide carried by said support, a needle holder mounted on said guide, a grooved sector carried by said needle holder, a crank pin on said fly wheel to enter said groove of said grooved sector, the radius of said sector groove being different from the radius of curvature of the path of movement of said crank pin.

7 A base, a rotatable shaft electric motor mounted on said base, a crank carrying member mounted on said motor shaft, a support held over said crank carrying member, a tubular needle holder guide carried by said support, a needle holder telescopically mounted on said guide and closed at its lower end, and means connecting said needle a holder with said crank carrying member in virtue of which the movement of said motor shaft will be imparted to said needle holder to reciprocate the same.

8. A base, a rotatable shaft electric motor mounted on said base, a crank carrying member mounted on said motor shaft, a support held over said crank carrying mem ber, a tubular needle holder guide carried by said support, a needle holder telescopically mounted on said guide and closed at its lower end, a grooved sector carried by said needle holder into which said crank projects to translate the movement of the motor shaft to said needle holder.

9. In a machine of the character stated, a rotatable shaft motor, a fixed needle holder guide, a needle holder telescoped over said guide, power translating devices connecting said needle holder with said motor shaft and including means for imparting a rapid movement to said needle holder during a part of its stroke and imparting a slow movement to said needle holder during the remaining part of its stroke.

10. In a machine of the character stated, a rotatable shaft motor, a fixed needle holder guide, a needle holder telescoped over said guide, power translating devices connecting said needle holder with said motor shaft and including means for imparting e "apid movement to said needle holder during a part of its stroke and imparting a slow movement to said needle holder during the remaining part of its stroke, said power translating devices comprising a grooved sector on said needle holder and a crank carrying member on said motor shaft cooperatively engaging said sector, the radius of curvature of said sector and the radius of curvature of the path of movement of said crank being difierent in degree.

THOMAS J. NASH.

Vitnesses GEO. E. HIBNER, W. J. CRANE.

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