US2214890A

US2214890A - Switch for electric pencil sharpeners

Info

Publication number: US2214890A
Application number: US220117A
Authority: US
Inventors: Jr William L Rhodes
Original assignee: Mitchell Thomas P
Current assignee: THOMAS P MITCHELL
Priority date: 1938-07-19
Filing date: 1938-07-19
Publication date: 1940-09-17
Anticipated expiration: 1957-09-17

Description

P 17, 7940 w. L. RHODES. JR

I SWITCH FOR ELECTRIC PENCIL SHARPENERS Filed July 19, 1938 2 Sheets-Sheet 1 a4 W 1: z.

Aiiorney's Sept. 17,1940. w. 1.. RHODES. JR 2,214,890

SWITCH FOR ELECTRIC PENCIL SHARPENERS Filed Ju1y'l9, 1935 8 2 Sheets-Sheet 2 I Inventor Patented Sept. 17, 1940 UNITED STATES PATENT OFFICE swrrcn FOR ELECTRIC PENCIL snmENEas Willia'm L. Rhodes, In, Aiken, S. 0., assignor oi! one-halite Thomas P. Mitchell, Aiken, S. 0.

serted in the sharpener to operate an electric motor for driving the sharpener.

A further object is to provide a switch mechanism of this character of simple and practical construction, which is neat and attractive in appearance, eilicient and reliable in performance,

m relatively inexpensive to manufacture and otherwise well adapted for the purposes for which the same is intended. I

Other objects and advantages reside in the detail of construction and operation as more fully 5 hereinafter described and claimed,'reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which- Figure 1 is a side elevational view with parts broken away and shown in section. I

Figure 2 is an end elevational view, and

Figure 3 is a bottom plan view.

Referring now to the drawings in detail, wherein for the purpose of illustration I have disclosed u a preferred embodiment of the invention,-the

numeral 5 denotes a base secured in spaced relation above a sub-base 6 by screws or the like I. To the upper surface of the base-6 is secured a pair of spaced brackets 8 between which is mounted a pencil sharpener 9 of conventional construction.

The sharpener is arranged foroperation by an electric motor i0 having a drive gear Ii operatively engaged with a pinion l2 mounted on the shaft I; of the sharpener. interposed in the circuit wires l4 leading to the motor is a toggle switch having its operating lever I 6 projecting downwardly through an opening in the base 5. The switch i5, motor l0 and gears l l and I! are m enclosed in a suitable housing I! secured to the upper surface of the base5.

At the forward end of the sharpener is positioned a shaft i1 upon which is'rotatably mounted a pair of spaced guide wheels I! of conventional construction and having milled pe- As more clearly illustrated in Figure 2 of the drawings. one edge of the roller is positioned in partly overlying relation with respect to the pencil receiving opening i9 when the latter is positioned in alignment with the sharpener Q. 5 To the lower end of the arm 2i is pivotally secured one end of a rod 24 extending through a, slotted opening 25 in the front edge of the base 5 and extending horizontally beneath the base with its other end provided with a yoke 28 10 engaging the lever ii of the switch ii. The intermediate portion of the rod 24 is freely inserted in an opening 21 of a bracket 28 secured to the underside of the base 5, said bracket constituting a fulcrum point for the rod. Springs ll 29 and 30 are connected to the rod at opposite sides of the bracket and extend in opposite directions for attaching to the respective opposite sides of the base 5, to yielda-bly maintain the switch in its off position. 90

In the operation of the device as the pencil .is inserted in the opening is the arm 2i will be actuated to close the swtch through the connection thereof by mean of the rod 24 in a manner as will be apparent. The free rotation of the roll- 86 er 22 enables the pencil to be inserted and removed wlthout binding against the arm 2i.

It is believed the details-of construction and manner of operation will be readily understood from the foregoing without further detailed explanation.

Having thus described the invention, what I claim is- 1. A switch operating mechanism for electrically operated-pencil sharpeners comprising an 88 upstanding arm pivotally mounted intermediate it ends, a pin projecting longitudinally from the upper end of the arm, a roller journalled on the pin and positioned in the path of a pencil when inserted in-the sharpener for pivotally actuating 4c the arm, and a horizontally extending switch operating rod secured to the lower end of said arm for closing a switch upon insertion of a pencil in the sharpener, and spring means yieldably urging the rod into a position for opening the switch. I

"2. A switch operating mechanism for electrically operated pencil sharpeners, comprising a vertically positioned arm pivotally mounted intermediate its ends, a pin projecting longitudio0 nally from the upper end of the arm, a roller journalled on the pin and positioned in the path of a pencil when inserted in the sharpener for pivotally actuating the arm, a horizontally extending rod pivoted intermediate its ends and Bi mounted intermediate its ends to the sharpener with the upper end of the arm in the path of a pencil inserted into the sharpener for actuating the arm and a rod pivoted intermediate its ends beneath the base. one end of the rod being connected to the switch and the other end of the rod being connected to the lower end of the arm for transmitting actuating movement of the arm to the switch.

WILLIAM L. RHODES, JR.