Abstract:
A perforated tape reader for different width tapes comprising a rotatable spool member having tape edge guide sections of different widths and locations arranged around the spool. A detenting device for the spool forms a second edge guide means for the tape at a point spaced from the spool. A dirt and light excluding cover, when closed, maintains the tape in tape guided position on the spool and on a feed sprocket.
Abstract:
A two color printing ribbon mechanism for adding, calculating or the like machines in which the ribbon has two differently colored sections arranged end-to-end. Normally, a first and most frequently used ribbon section is held in contact with an inking device and the second less frequently used ribbon section is located at the printing line. During a cycle of the machine in which the first section is to be used for imprinting, and prior to the printing operation, the ribbon is moved endwise to locate the first section at the printing line and to move the second section into contact with a second and appropriately colored inking device. During a cycle in which the second section is to be used for imprinting, the ribbon moving mechanism is merely disabled, leaving the second ribbon section at the printing line during the printing operation.
Abstract:
A vibration absorbing support comprising a base having an upstanding post and a concentrically arranged flange surrounding the post with radially extending upstanding ribs therebetween. An annular elastomeric bushing is slidably fitted between the post and the flange and rests on the ribs. The bushing supports a base for a vibrating apparatus in such a manner that the elastomeric material is subjected to a shearing force in a vertical direction and a compressive force in a horizontal direction to permit a maximum amplitude of movement vertically and a restricted horizontal movement.
Abstract:
A key operated switch incorporated with a printed circuit board having conductors thereon and an upwardly extending conical post of non-conducting material between adjacent terminals of certain of the conductors. An expandable toroidal contact spring surrounds the post and is normally located above the conductors by virtue of its constriction against the conical surface. A depressible key member, which is normally held in raised position by the contact spring, is effective upon depression to move the spring into bridging contact with the conductors.
Abstract:
A key switch incorporated with a printed circuit board having conductors thereon and a bearing member loosely fitted in a hole formed between adjacent terminal ends of the conductors. A depressible key is slideable in the bearing member and has a generally conical surface engaging an expandable toroidal contact spring member which rests on an outwardly tapering surface of the bearing member. As the key is depressed the conical surface thereof expands the spring member downwardly over the surface of the bearing member and into bridging contact with the conductors.
Abstract:
A pulse type readout apparatus for data registering machines, such as mechanical adding and calculating machines in which data is transferred from the machine to a suitable remotely controlled device in parallel fashion by pulse signals. Such signals are formed by switch contacts which are momentarily closed by gear teeth carried by denominationally arranged differential actuators of the machine. The switch contacts are selectively moved into and out of cooperative relation with the actuators.
Abstract:
A printer is disclosed having type members carrying type characters, the members being yieldably advanced past a printing point and arrested by electromagnetically actuated pawls which are yieldably maintained in both retracted positions and arresting positions by snap-over springs. Abutments on the type members engage the pawls when the type members are in home positions to prevent accidental movement of the pawls to arresting positions. The electromagnetically operable means comprises pairs of side-by-side magnet modules in which each module is effective to retain the parts of an adjacent module in place.
Abstract:
A PRESSER DEVICE FOR MOVING A PAPER STRIP AND PRINTING RIBBON AT A CONTROLLED RATE OF SPEED AGAINST TYPE MEMBERS PRIOR TO STRIKING MOVEMENT OF PRINTING HAMMERS WHEREBY TO REDUCE PRINTING NOISE.
Abstract:
A printing platen comprising a relatively soft elastomeric body and a thin sheet of relatively hard plastic or metal which is held taut against the surface of the body by spring pressure at the point where printing is to occur.
Abstract:
The printing sectors of a data printing mechanism are provided with arcuate outwardly movable type sections which are flexed by an elongate printing member to squeeze selected type characters against a paper tape and platen. The printing member is also previously moved endwise under control of sensing means which is arrested by the sector containing the highermost significant digit to thus locate an actuating part of the printing member under only those sectors which contain the highermost significant digit and all lower order digits and/or zeros.